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<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>As filed with the Securities and Exchange Commission on May&nbsp;1, 2009</B>
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    <TD align="left" valign="top">&nbsp;
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    <TD>&nbsp;</TD>
    <TD align="right" valign="top"><B>Registration No.&nbsp;333-</B><U>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></TD>
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<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
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<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>WASHINGTON, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT UNDER THE<BR>
SECURITIES ACT OF 1933</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></B>
</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>USEC INC.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact Name of Registrant as Specified in its Charter)</DIV>


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    <TD align="center" valign="top"><B>Delaware</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>52-2107911</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State of Incorporation)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer Identification No.)</TD>
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<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>2 Democracy Center<BR>
6903 Rockledge Drive<BR>
Bethesda, MD 20817</B><BR>
(Address of Principal Executive Offices)(Zip Code)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt"><B>USEC Inc. 2009 Equity Incentive Plan</B></DIV>


<DIV align="center" style="font-size: 10pt"><B>USEC Inc. 2009 Employee Stock Purchase Plan</B></DIV>


<DIV align="center" style="font-size: 10pt">(Full Title of the Plan)</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt"><B>John C. Barpoulis</B></DIV>


<DIV align="center" style="font-size: 10pt"><B>Senior Vice President and Chief Financial Officer</B></DIV>


<DIV align="center" style="font-size: 10pt"><B>USEC Inc.</B></DIV>


<DIV align="center" style="font-size: 10pt"><B>2 Democracy Center</B></DIV>


<DIV align="center" style="font-size: 10pt"><B>6903 Rockledge Drive</B></DIV>


<DIV align="center" style="font-size: 10pt"><B>Bethesda, MD 20817</B></DIV>


<DIV align="center" style="font-size: 10pt"><B>(301)&nbsp;564-3200</B></DIV>


<DIV align="center" style="font-size: 10pt">(Name, Address and Telephone Number of Agent for Service)</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer, or a smaller reporting company.
See the definitions of &#147;large
accelerated filer,&#148; &#147;accelerated filer&#148; and &#147;smaller reporting company&#148; in Rule 12b-2 of the Exchange Act. (Check one):</DIV>



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    <TD width="3%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
</TR>
<TR valign="top">
    <TD nowrap align="center" valign="top">Large accelerated filer <FONT face="Wingdings">&#254;</FONT>&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD nowrap align="center" valign="top">Accelerated filer <FONT face="Wingdings">&#111;</FONT>&nbsp;</TD>
    <TD align="center">&nbsp;</TD>
    <TD nowrap align="center">Non-accelerated filer &nbsp; <FONT face="Wingdings">&#111;</FONT><BR>
(Do not check if a smaller reporting company)</TD>
    <TD align="center">&nbsp;</TD>
    <TD nowrap align="center" valign="top">Smaller reporting company <FONT face="Wingdings">&#111;</FONT>&nbsp;</TD>

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<DIV align="center" style="font-size: 10pt; margin-top: 18pt">CALCULATION OF REGISTRATION FEE
</DIV>

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    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
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    <TD width="2%">&nbsp;</TD>
    <TD width="6%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="center" colspan="21" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Title of Securities</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Proposed Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Proposed Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Amount of</TD>
    <TD width="1%">&nbsp;</TD>
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<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">To Be</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">To Be</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Offering Price Per</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Aggregate Offering</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Registration</TD>
    <TD width="1%">&nbsp;</TD>
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<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registered (1)(2)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Share (3)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Price (3)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Fee (3)</TD>
    <TD width="1%">&nbsp;</TD>
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                    <TD valign="top" style="border-top: 2px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">Common Stock, par
value $.10 per share
</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 2px solid #000000">5,500,000 shares
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="top" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" valign="top" style="border-top: 2px solid #000000">6.29</TD>
    <TD nowrap valign="top" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="top" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" valign="top" style="border-top: 2px solid #000000">34,595,000</TD>
    <TD nowrap valign="top" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="top" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" valign="top" style="border-top: 2px solid #000000">1,930.40</TD>
    <TD nowrap valign="top" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="21" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

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<TR>
    <TD width="3%"></TD>
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    <TD width="96"></TD>
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<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>We are registering 4,500,000 shares pursuant to the USEC Inc. 2009 Equity Incentive Plan and
1,000,000 shares pursuant to the USEC Inc. 2009 Employee Stock Purchase Plan. Pursuant to Rule
416(a) under the Securities Act of 1933, this registration statement shall be deemed to cover an
indeterminate number of additional shares that may become issuable as a result of stock splits,
stock dividends or similar transactions pursuant to the anti-dilution provisions of the USEC Inc.
2009 Equity Incentive Plan and the USEC Inc. 2009 Employee Stock Purchase Plan.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Includes preferred stock purchase rights (the &#147;Rights&#148;) which, prior to the occurrence of
certain events, will not be exercisable or evidenced separately from the common stock. Value
attributable to such Rights, if any, is reflected in the market price of the common stock. The
terms of the Rights are described in the Rights Agreement, filed as Exhibit&nbsp;1 to our registration
statement filed on Form 8-A filed with the Securities and Exchange Commission on April&nbsp;24, 2001.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(3)</TD>
    <TD>&nbsp;</TD>
    <TD>Pursuant to Rule 457(h) of the Securities Act of 1933, and solely for the purpose of
calculating the registration fee, the proposed maximum offering price per share is based on the
average of the high and low sales prices of USEC&#146;s Common Stock on the New York Stock Exchange on
April&nbsp;28, 2009.</TD>
</TR>

</TABLE>



<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





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<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART I</B>
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS</B>

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The documents containing the information specified in Item&nbsp;1 and Item&nbsp;2 of Part&nbsp;I of the
registration statement on Form S-8 are omitted from this filing in accordance with the provisions
of Rule&nbsp;424 under the Securities Act of 1933, as amended (the &#147;Securities Act&#148;), and the
introductory note to Part&nbsp;I of Form S-8. The documents containing the information specified in Part
I will be sent or given to employees as specified by Rule&nbsp;428(b)(1) of the Securities Act. These
documents and the documents incorporated by reference in this registration statement pursuant to
Item&nbsp;3 of Part&nbsp;II of this registration statement, taken together, constitute a prospectus that
meets the requirements of Section 10(a) of the Securities Act.
</DIV>

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<DIV align="left"><A NAME="001"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II</B>
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B>

</DIV>
<!-- link2 "Item&nbsp;3. Incorporation of Documents by Reference" -->
<DIV align="left"><A NAME="002"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;3. Incorporation of Documents by Reference.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following documents filed by us with the Securities and Exchange Commission pursuant to
the Securities Exchange Act of 1934, as amended (the &#147;Exchange Act&#148;) are incorporated by reference
in this registration statement:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)&nbsp;Our Annual Report on Form 10-K for the year ended December&nbsp;31, 2008, filed with the
Securities and Exchange Commission, or SEC, on February&nbsp;26, 2009, and the portions of our Proxy
Statement, filed with the SEC on March&nbsp;19, 2009, for our 2009 Annual Meeting of Shareholders
incorporated by reference into our Annual Report;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)&nbsp;Our Current Reports on Form 8-K filed with the SEC on January&nbsp;13, 2009, January&nbsp;21, 2009,
February&nbsp;5, 2009 (Item&nbsp;8.01 only), February&nbsp;20, 2009 and March&nbsp;2, 2009; and
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)&nbsp;A description of our common stock and preferred stock purchase rights included under &#147;Item
1. Description of Registrant&#146;s Securities to be Registered&#148; in the Registration Statement on Form
8-A, as amended (File No.&nbsp;001-14287), as filed with the Securities and Exchange commission on April
30, 2008, including any amendment or report filed for the purpose of updating such description.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In addition to the foregoing, all documents subsequently filed by us with the Securities and
Exchange Commission pursuant to Sections&nbsp;13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to
the filing of a post-effective amendment which indicates that all securities offered under this
registration statement have been sold or which deregisters all securities remaining unsold, shall
be deemed to be incorporated by reference into this registration statement and to be a part of this
registration statement from the date of filing of such documents. Any statement contained in a
document incorporated by reference in this registration statement shall be deemed to be modified or
superseded for purposes of this registration statement to the extent that a statement contained
herein or in any subsequently filed document that is also incorporated by reference herein modifies
</DIV>



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<DIV align="left" style="font-size: 10pt; margin-top: 6pt">or supersedes such statement. Any statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this registration statement.
</DIV>

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<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;4. Description of Securities.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>

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<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;5. Interest of Named Experts and Counsel.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>

<!-- link2 "Item&nbsp;6. Indemnification of Directors and Officers" -->

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;6. Indemnification of Directors and Officers.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;145 of the General Corporation Law of the State of Delaware (the &#147;DGCL&#148;) empowers a
Delaware corporation to indemnify any person who was or is a party to or is threatened to be made a
party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal,
administrative or investigative (other than an action by or in the right of the corporation) by
reason of the fact that such person is or was a director, officer, employee or agent of such
corporation, or is or was serving at the request of such corporation as a director, officer,
employee or agent of another corporation, partnership, joint venture, trust or other enterprise.
The indemnity may include expenses (including attorney&#146;s fees), judgments, fines and amounts paid
in settlement actually and reasonably incurred by such person in connection with such action, suit
or proceeding, provided that such person acted in good faith and in a manner such person reasonably
believed to be in or not opposed to the best interests of the corporation and, with respect to any
criminal action or proceeding, had no reasonable cause to believe such person&#146;s conduct was
unlawful.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Delaware corporation may indemnify directors, officers, employees and other agents of such
corporation in an action by or in the right of the corporation under the same conditions, except
that no indemnification shall be made if such person is adjudged to be liable to the corporation
unless, and only to the extent that, a court determines that such person fairly and reasonably is
entitled to indemnity for expenses the court deems proper in light of liability adjudication.
Where a director, officer, employee or agent of the corporation is successful on the merits or
otherwise in the defense of any action, suit or proceeding referred to in this Item&nbsp;6 or in defense
of any claim, issue or matter herein, the corporation must indemnify such person against the
expenses (including attorney&#146;s fees) which he or she actually and reasonably incurred in connection
therewith.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Both our Bylaws and Certificate of Incorporation require us to indemnify each of our directors
and officers to the fullest extent permitted by law, subject to certain exceptions, in connection
with any actual or threatened action or proceeding arising out of his or her service to us or to
other organizations at our request.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;As permitted by Section&nbsp;102(b)(7) of the DGCL, our Certificate of Incorporation also contains
a provision eliminating the personal liability of a director to USEC Inc. or our shareholders for
monetary damages for breach of fiduciary duty as a director, subject to certain exceptions.
</DIV>


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<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In addition to indemnification provided for in our Certificate of Incorporation and Bylaws, we
have entered into indemnification agreements with our directors and executive officers. We intend
to enter into indemnification agreements with any new directors and executive officers in the
future. In addition, we maintain directors&#146; and officers&#146; liability insurance.
</DIV>

<!-- link2 "Item&nbsp;7. Exemption from Registration Claimed" -->

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7. Exemption from Registration Claimed.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>

<!-- link2 "Item&nbsp;8. Exhibits" -->

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8. Exhibits.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following is a list of exhibits filed as part of this registration statement.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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<TR valign="bottom">
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Exhibit No.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Certificate of Incorporation of USEC Inc., as amended (incorporated by reference to Exhibit
3.1 to the Quarterly Report on Form&nbsp;10-Q for the quarter ended March&nbsp;31, 2008).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated Bylaws of USEC Inc., dated December&nbsp;13, 2007 (incorporated by reference
to Exhibit&nbsp;3.1 of the Current Report on Form&nbsp;8-K filed on December&nbsp;13, 2007).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Rights Agreement, dated April&nbsp;24, 2001, between USEC Inc. and Fleet National Bank, as Rights
Agent, including the form of Certificate of Designation, Preferences and Rights as Exhibit&nbsp;A,
the form of Rights Certificates as Exhibit&nbsp;B and the Summary of Rights as Exhibit&nbsp;C
(incorporated by reference to Exhibit&nbsp;99 to Registration Statement on Form&nbsp;8-A filed April&nbsp;24,
2001).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Sonnenschein Nath &#038; Rosenthal LLP.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP, independent registered public accounting firm.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Sonnenschein Nath &#038; Rosenthal LLP (included in the Opinion filed as Exhibit&nbsp;5.1).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on the signature page of this registration statement).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">USEC Inc. 2009 Equity Incentive Plan (incorporated by reference to Appendix&nbsp;A of the
Definitive Proxy Statement on Schedule&nbsp;14A filed on March&nbsp;19, 2009).</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Exhibit No.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">USEC Inc. 2009 Employee Stock Purchase Plan (incorporated by reference to Appendix&nbsp;B of the
Definitive Proxy Statement on Schedule&nbsp;14A filed on March&nbsp;19, 2009).</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<!-- link2 "Item&nbsp;9. Undertakings" -->

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9. Undertakings.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">(a)&nbsp;The undersigned registrant hereby undertakes:
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">(1)&nbsp;To file, during any period in which offers or sales are being made, a post-effective
amendment to this registration statement:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(i)&nbsp;To include any prospectus required by Section&nbsp;10(a)(3) of the
Securities Act of 1933;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(ii)&nbsp;To reflect in the prospectus any facts or events arising after the effective
date of this registration statement (or the most recent post-effective amendment
thereof) which, individually or in the aggregate, represent a fundamental change in
the information set forth in this registration statement. Notwithstanding the
foregoing, any increase or decrease in volume of securities offered (if the total
dollar value of securities offered would not exceed that which was registered) and
any deviation from the low or high end of the estimated maximum offering range may
be reflected in the form of prospectus filed with the Commission pursuant to Rule
424(b) if, in aggregate, the changes in volume and price represent no more than a 20
percent change in the maximum aggregate offering price set forth in the &#147;Calculation
of Registration Fee&#148; table in the effective registration statement; and
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(iii)&nbsp;To include any material information with respect to the plan of distribution
not previously disclosed in this registration statement or any material change to
such information in this registration statement;
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<I>Provided, however</I>, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information
required to be included in a post-effective amendment by those paragraphs is contained in reports
filed with or furnished to the Securities and Exchange Commission by the registrant pursuant to
section 13 or section 15(d) of the Securities Exchange Act of 1934 that are incorporated by
reference in this registration statement.
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">(2)&nbsp;That, for the purpose of determining any liability under the Securities Act of 1933, each
such post-effective amendment shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that time shall be deemed to
be the initial bona fide offering thereof.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">(3)&nbsp;To remove from registration by means of a post-effective amendment any of the securities
being registered which remain unsold at the termination of the offering.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">(4)&nbsp;That, for the purpose of determining liability of the registrant under the Securities Act of
</DIV>

<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">1933 to any purchaser in the initial distribution of the securities:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;That in a primary offering of securities of the undersigned registrant pursuant to this
registration statement, regardless of the underwriting method used to sell the securities to the
purchaser, if the securities are offered or sold to such purchaser by means of any of the
following communications, the undersigned registrant will be a seller to the purchaser and will
be considered to offer or sell such securities to such purchaser:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">(i)&nbsp;Any preliminary prospectus or prospectus of the undersigned registrant relating to the
offering required to be filed pursuant to Rule&nbsp;424;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">(ii)&nbsp;Any free writing prospectus relating to the offering prepared by or on behalf of the
undersigned registrant or used or referred to by the undersigned registrant;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">(iii)&nbsp;The portion of any other free writing prospectus relating to the offering containing
material information about the undersigned registrant or its securities provided by or on
behalf of the undersigned registrant; and
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">(iv)&nbsp;Any other communication that is an offer in the offering made by the undersigned
registrant to the purchaser.
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">(b)&nbsp;The undersigned registrant hereby undertakes that, for purposes of determining any liability
under the Securities Act of 1933, each filing of the registrant&#146;s annual report pursuant to section
13(a) or section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing
of an employee benefit plan&#146;s annual report pursuant to section 15(d) of the Securities Exchange
Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering thereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">(h)&nbsp;Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be
permitted to directors, officers and controlling persons of the registrant pursuant to the
foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy as expressed in
the Act and is, therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred or paid by a
director, officer or controlling person of the registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person in connection with
the securities being registered, the registrant will, unless in the opinion of its counsel the
matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the
question whether such indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">



<!-- link1 "SIGNATURES" -->

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it
has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and
has duly caused this registration statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Bethesda, State of Maryland, on this 1<SUP style="font-size: 85%; vertical-align: text-top">st</SUP> day
of May, 2009.
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">USEC INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ John K. Welch
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">John K. Welch&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">President and Chief Executive Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>POWER OF ATTORNEY</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes
and appoints John K. Welch, John C. Barpoulis and Peter B. Saba, and each of them, the
undersigned&#146;s true and lawful attorneys-in-fact and agents, with full power of substitution and
revocation, for and in the undersigned&#146;s name, place and stead, in any and all capacities, to sign
any and all amendments (including post-effective amendments) to this registration statement on Form
S-8 and to file the same, with all exhibits thereto, and other documents in connection therewith,
with the SEC, granting unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary to be done, as
fully to all intents and purposes as the undersigned might or could do in person, hereby ratify and
confirming all that said attorneys-in-fact and agents or any of them, or their or his substitutes,
may lawfully do or cause to be done by virtue thereof.
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, this registration statement has
been signed by the following persons in the capacities indicated on this 1<SUP style="font-size: 85%; vertical-align: text-top">st</SUP> day of May,
2009.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="40%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="55%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">SIGNATURE</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">TITLE</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ John K. Welch
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">President, Chief Executive Officer and Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">John K. Welch
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">(Principal Executive Officer)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ John C. Barpoulis
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Senior Vice President and Chief Financial Officer</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">John C. Barpoulis
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">(Principal Financial Officer)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ J. Tracy Mey
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Controller and Chief Accounting Officer</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">J. Tracy Mey
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">(Principal Accounting Officer)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ James R. Mellor
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chairman of the Board and Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">James R. Mellor</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Michael H. Armacost
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Michael H. Armacost</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Joyce F. Brown
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Joyce F. Brown</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Joseph T. Doyle
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Joseph T. Doyle</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ H. William Habermeyer
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">H. William Habermeyer</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ John R. Hall
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">John R. Hall</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ William J. Madia
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">William J. Madia</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ W. Henson Moore
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">W. Henson Moore</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Joseph F. Paquette, Jr.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"> Director</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Joseph F. Paquette, Jr.</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<!-- link1 "Exhibit Index" -->

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>Exhibit&nbsp;Index</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Exhibit No.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Certificate of Incorporation of USEC Inc., as amended (incorporated by reference to Exhibit
3.1 to the Quarterly Report on Form&nbsp;10-Q for the quarter ended March&nbsp;31, 2008).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated Bylaws of USEC Inc., dated December&nbsp;13, 2007 (incorporated by reference
to Exhibit&nbsp;3.1 of the Current Report on Form&nbsp;8-K filed on December&nbsp;13, 2007).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Rights Agreement, dated April&nbsp;24, 2001, between USEC Inc. and Fleet National Bank, as Rights
Agent, including the form of Certificate of Designation, Preferences and Rights as Exhibit&nbsp;A,
the form of Rights Certificates as Exhibit&nbsp;B and the Summary of Rights as Exhibit&nbsp;C
(incorporated by reference to Exhibit&nbsp;99 to Registration Statement on Form&nbsp;8-A filed April&nbsp;24,
2001).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Sonnenschein Nath &#038; Rosenthal LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP, independent registered public accounting firm.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Sonnenschein Nath &#038; Rosenthal LLP (included in the Opinion filed as Exhibit&nbsp;5.1).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on the signature page of this registration statement).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">USEC Inc. 2009 Equity Incentive Plan (incorporated by reference to Appendix&nbsp;A of the
Definitive Proxy Statement on Schedule&nbsp;14A filed on March&nbsp;19, 2009).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">USEC Inc. 2009 Employee Stock Purchase Plan (incorporated by reference to Appendix&nbsp;B of the
Definitive Proxy Statement on Schedule&nbsp;14A filed on March&nbsp;19, 2009).</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>



</BODY>
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sv8
As filed with the Securities and Exchange Commission on May 1, 2009
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM S-8
REGISTRATION STATEMENT UNDER THE
SECURITIES ACT OF 1933
USEC INC.
(Exact Name of Registrant as Specified in its Charter)
Delaware
52-2107911
(State of Incorporation)
(I.R.S. Employer Identification No.)
2 Democracy Center
6903 Rockledge Drive
Bethesda, MD 20817
(Address of Principal Executive Offices)(Zip Code)
USEC Inc. 2009 Equity Incentive Plan
USEC Inc. 2009 Employee Stock Purchase Plan
(Full Title of the Plan)
John C. Barpoulis
Senior Vice President and Chief Financial Officer
USEC Inc.
2 Democracy Center
6903 Rockledge Drive
Bethesda, MD 20817
(301) 564-3200
(Name, Address and Telephone Number of Agent for Service)
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer, or a smaller reporting company.
See the definitions of "large
accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer
þ
Accelerated filer
o
Non-accelerated filer
o
(Do not check if a smaller reporting company)
Smaller reporting company
o
CALCULATION OF REGISTRATION FEE
Title of Securities
Amount
Proposed Maximum
Proposed Maximum
Amount of
To Be
To Be
Offering Price Per
Aggregate Offering
Registration
Registered
Registered (1)(2)
Share (3)
Price (3)
Fee (3)
Common Stock, par
value $.10 per share
5,500,000 shares
$
6.29
$
34,595,000
$
1,930.40
(1)
We are registering 4,500,000 shares pursuant to the USEC Inc. 2009 Equity Incentive Plan and
1,000,000 shares pursuant to the USEC Inc. 2009 Employee Stock Purchase Plan. Pursuant to Rule
416(a) under the Securities Act of 1933, this registration statement shall be deemed to cover an
indeterminate number of additional shares that may become issuable as a result of stock splits,
stock dividends or similar transactions pursuant to the anti-dilution provisions of the USEC Inc.
2009 Equity Incentive Plan and the USEC Inc. 2009 Employee Stock Purchase Plan.
(2)
Includes preferred stock purchase rights (the "Rights") which, prior to the occurrence of
certain events, will not be exercisable or evidenced separately from the common stock. Value
attributable to such Rights, if any, is reflected in the market price of the common stock. The
terms of the Rights are described in the Rights Agreement, filed as Exhibit 1 to our registration
statement filed on Form 8-A filed with the Securities and Exchange Commission on April 24, 2001.
(3)
Pursuant to Rule 457(h) of the Securities Act of 1933, and solely for the purpose of
calculating the registration fee, the proposed maximum offering price per share is based on the
average of the high and low sales prices of USEC's Common Stock on the New York Stock Exchange on
April 28, 2009.
PART I
INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS
The documents containing the information specified in Item 1 and Item 2 of Part I of the
registration statement on Form S-8 are omitted from this filing in accordance with the provisions
of Rule 424 under the Securities Act of 1933, as amended (the "Securities Act"), and the
introductory note to Part I of Form S-8. The documents containing the information specified in Part
I will be sent or given to employees as specified by Rule 428(b)(1) of the Securities Act. These
documents and the documents incorporated by reference in this registration statement pursuant to
Item 3 of Part II of this registration statement, taken together, constitute a prospectus that
meets the requirements of Section 10(a) of the Securities Act.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3. Incorporation of Documents by Reference.
The following documents filed by us with the Securities and Exchange Commission pursuant to
the Securities Exchange Act of 1934, as amended (the "Exchange Act") are incorporated by reference
in this registration statement:
(a) Our Annual Report on Form 10-K for the year ended December 31, 2008, filed with the
Securities and Exchange Commission, or SEC, on February 26, 2009, and the portions of our Proxy
Statement, filed with the SEC on March 19, 2009, for our 2009 Annual Meeting of Shareholders
incorporated by reference into our Annual Report;
(b) Our Current Reports on Form 8-K filed with the SEC on January 13, 2009, January 21, 2009,
February 5, 2009 (Item 8.01 only), February 20, 2009 and March 2, 2009; and
(c) A description of our common stock and preferred stock purchase rights included under "Item
1. Description of Registrant's Securities to be Registered" in the Registration Statement on Form
8-A, as amended (File No. 001-14287), as filed with the Securities and Exchange commission on April
30, 2008, including any amendment or report filed for the purpose of updating such description.
In addition to the foregoing, all documents subsequently filed by us with the Securities and
Exchange Commission pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to
the filing of a post-effective amendment which indicates that all securities offered under this
registration statement have been sold or which deregisters all securities remaining unsold, shall
be deemed to be incorporated by reference into this registration statement and to be a part of this
registration statement from the date of filing of such documents. Any statement contained in a
document incorporated by reference in this registration statement shall be deemed to be modified or
superseded for purposes of this registration statement to the extent that a statement contained
herein or in any subsequently filed document that is also incorporated by reference herein modifies
or supersedes such statement. Any statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this registration statement.
Item 4. Description of Securities.
Not applicable.
Item 5. Interest of Named Experts and Counsel.
Not applicable.
Item 6. Indemnification of Directors and Officers.
Section 145 of the General Corporation Law of the State of Delaware (the "DGCL") empowers a
Delaware corporation to indemnify any person who was or is a party to or is threatened to be made a
party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal,
administrative or investigative (other than an action by or in the right of the corporation) by
reason of the fact that such person is or was a director, officer, employee or agent of such
corporation, or is or was serving at the request of such corporation as a director, officer,
employee or agent of another corporation, partnership, joint venture, trust or other enterprise.
The indemnity may include expenses (including attorney's fees), judgments, fines and amounts paid
in settlement actually and reasonably incurred by such person in connection with such action, suit
or proceeding, provided that such person acted in good faith and in a manner such person reasonably
believed to be in or not opposed to the best interests of the corporation and, with respect to any
criminal action or proceeding, had no reasonable cause to believe such person's conduct was
unlawful.
A Delaware corporation may indemnify directors, officers, employees and other agents of such
corporation in an action by or in the right of the corporation under the same conditions, except
that no indemnification shall be made if such person is adjudged to be liable to the corporation
unless, and only to the extent that, a court determines that such person fairly and reasonably is
entitled to indemnity for expenses the court deems proper in light of liability adjudication.
Where a director, officer, employee or agent of the corporation is successful on the merits or
otherwise in the defense of any action, suit or proceeding referred to in this Item 6 or in defense
of any claim, issue or matter herein, the corporation must indemnify such person against the
expenses (including attorney's fees) which he or she actually and reasonably incurred in connection
therewith.
Both our Bylaws and Certificate of Incorporation require us to indemnify each of our directors
and officers to the fullest extent permitted by law, subject to certain exceptions, in connection
with any actual or threatened action or proceeding arising out of his or her service to us or to
other organizations at our request.
As permitted by Section 102(b)(7) of the DGCL, our Certificate of Incorporation also contains
a provision eliminating the personal liability of a director to USEC Inc. or our shareholders for
monetary damages for breach of fiduciary duty as a director, subject to certain exceptions.
In addition to indemnification provided for in our Certificate of Incorporation and Bylaws, we
have entered into indemnification agreements with our directors and executive officers. We intend
to enter into indemnification agreements with any new directors and executive officers in the
future. In addition, we maintain directors' and officers' liability insurance.
Item 7. Exemption from Registration Claimed.
Not applicable.
Item 8. Exhibits.
The following is a list of exhibits filed as part of this registration statement.
Exhibit No.
Description
4.1
Certificate of Incorporation of USEC Inc., as amended (incorporated by reference to Exhibit
3.1 to the Quarterly Report on Form 10-Q for the quarter ended March 31, 2008).
4.2
Amended and Restated Bylaws of USEC Inc., dated December 13, 2007 (incorporated by reference
to Exhibit 3.1 of the Current Report on Form 8-K filed on December 13, 2007).
4.3
Rights Agreement, dated April 24, 2001, between USEC Inc. and Fleet National Bank, as Rights
Agent, including the form of Certificate of Designation, Preferences and Rights as Exhibit A,
the form of Rights Certificates as Exhibit B and the Summary of Rights as Exhibit C
(incorporated by reference to Exhibit 99 to Registration Statement on Form 8-A filed April 24,
2001).
5.1
Opinion of Sonnenschein Nath & Rosenthal LLP.
23.1
Consent of PricewaterhouseCoopers LLP, independent registered public accounting firm.
23.2
Consent of Sonnenschein Nath & Rosenthal LLP (included in the Opinion filed as Exhibit 5.1).
24.1
Power of Attorney (included on the signature page of this registration statement).
99.1
USEC Inc. 2009 Equity Incentive Plan (incorporated by reference to Appendix A of the
Definitive Proxy Statement on Schedule 14A filed on March 19, 2009).
Exhibit No.
Description
99.2
USEC Inc. 2009 Employee Stock Purchase Plan (incorporated by reference to Appendix B of the
Definitive Proxy Statement on Schedule 14A filed on March 19, 2009).
Item 9. Undertakings.
(a) The undersigned registrant hereby undertakes:
(1) To file, during any period in which offers or sales are being made, a post-effective
amendment to this registration statement:
(i) To include any prospectus required by Section 10(a)(3) of the
Securities Act of 1933;
(ii) To reflect in the prospectus any facts or events arising after the effective
date of this registration statement (or the most recent post-effective amendment
thereof) which, individually or in the aggregate, represent a fundamental change in
the information set forth in this registration statement. Notwithstanding the
foregoing, any increase or decrease in volume of securities offered (if the total
dollar value of securities offered would not exceed that which was registered) and
any deviation from the low or high end of the estimated maximum offering range may
be reflected in the form of prospectus filed with the Commission pursuant to Rule
424(b) if, in aggregate, the changes in volume and price represent no more than a 20
percent change in the maximum aggregate offering price set forth in the "Calculation
of Registration Fee" table in the effective registration statement; and
(iii) To include any material information with respect to the plan of distribution
not previously disclosed in this registration statement or any material change to
such information in this registration statement;
Provided, however
, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information
required to be included in a post-effective amendment by those paragraphs is contained in reports
filed with or furnished to the Securities and Exchange Commission by the registrant pursuant to
section 13 or section 15(d) of the Securities Exchange Act of 1934 that are incorporated by
reference in this registration statement.
(2) That, for the purpose of determining any liability under the Securities Act of 1933, each
such post-effective amendment shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that time shall be deemed to
be the initial bona fide offering thereof.
(3) To remove from registration by means of a post-effective amendment any of the securities
being registered which remain unsold at the termination of the offering.
(4) That, for the purpose of determining liability of the registrant under the Securities Act of
1933 to any purchaser in the initial distribution of the securities:
That in a primary offering of securities of the undersigned registrant pursuant to this
registration statement, regardless of the underwriting method used to sell the securities to the
purchaser, if the securities are offered or sold to such purchaser by means of any of the
following communications, the undersigned registrant will be a seller to the purchaser and will
be considered to offer or sell such securities to such purchaser:
(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the
offering required to be filed pursuant to Rule 424;
(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the
undersigned registrant or used or referred to by the undersigned registrant;
(iii) The portion of any other free writing prospectus relating to the offering containing
material information about the undersigned registrant or its securities provided by or on
behalf of the undersigned registrant; and
(iv) Any other communication that is an offer in the offering made by the undersigned
registrant to the purchaser.
(b) The undersigned registrant hereby undertakes that, for purposes of determining any liability
under the Securities Act of 1933, each filing of the registrant's annual report pursuant to section
13(a) or section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing
of an employee benefit plan's annual report pursuant to section 15(d) of the Securities Exchange
Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering thereof.
(h) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be
permitted to directors, officers and controlling persons of the registrant pursuant to the
foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy as expressed in
the Act and is, therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred or paid by a
director, officer or controlling person of the registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person in connection with
the securities being registered, the registrant will, unless in the opinion of its counsel the
matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the
question whether such indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it
has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and
has duly caused this registration statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Bethesda, State of Maryland, on this 1
st
day
of May, 2009.
USEC INC.
By:
/s/ John K. Welch
John K. Welch
President and Chief Executive Officer
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes
and appoints John K. Welch, John C. Barpoulis and Peter B. Saba, and each of them, the
undersigned's true and lawful attorneys-in-fact and agents, with full power of substitution and
revocation, for and in the undersigned's name, place and stead, in any and all capacities, to sign
any and all amendments (including post-effective amendments) to this registration statement on Form
S-8 and to file the same, with all exhibits thereto, and other documents in connection therewith,
with the SEC, granting unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary to be done, as
fully to all intents and purposes as the undersigned might or could do in person, hereby ratify and
confirming all that said attorneys-in-fact and agents or any of them, or their or his substitutes,
may lawfully do or cause to be done by virtue thereof.
Pursuant to the requirements of the Securities Act of 1933, this registration statement has
been signed by the following persons in the capacities indicated on this 1
st
day of May,
2009.
SIGNATURE
TITLE
/s/ John K. Welch
President, Chief Executive Officer and Director
John K. Welch
(Principal Executive Officer)
/s/ John C. Barpoulis
Senior Vice President and Chief Financial Officer
John C. Barpoulis
(Principal Financial Officer)
/s/ J. Tracy Mey
Controller and Chief Accounting Officer
J. Tracy Mey
(Principal Accounting Officer)
/s/ James R. Mellor
Chairman of the Board and Director
James R. Mellor
/s/ Michael H. Armacost
Director
Michael H. Armacost
/s/ Joyce F. Brown
Director
Joyce F. Brown
/s/ Joseph T. Doyle
Director
Joseph T. Doyle
/s/ H. William Habermeyer
Director
H. William Habermeyer
/s/ John R. Hall
Director
John R. Hall
/s/ William J. Madia
Director
William J. Madia
/s/ W. Henson Moore
Director
W. Henson Moore
/s/ Joseph F. Paquette, Jr.
Director
Joseph F. Paquette, Jr.
Exhibit Index
Exhibit No.
Description
4.1
Certificate of Incorporation of USEC Inc., as amended (incorporated by reference to Exhibit
3.1 to the Quarterly Report on Form 10-Q for the quarter ended March 31, 2008).
4.2
Amended and Restated Bylaws of USEC Inc., dated December 13, 2007 (incorporated by reference
to Exhibit 3.1 of the Current Report on Form 8-K filed on December 13, 2007).
4.3
Rights Agreement, dated April 24, 2001, between USEC Inc. and Fleet National Bank, as Rights
Agent, including the form of Certificate of Designation, Preferences and Rights as Exhibit A,
the form of Rights Certificates as Exhibit B and the Summary of Rights as Exhibit C
(incorporated by reference to Exhibit 99 to Registration Statement on Form 8-A filed April 24,
2001).
5.1
Opinion of Sonnenschein Nath & Rosenthal LLP
23.1
Consent of PricewaterhouseCoopers LLP, independent registered public accounting firm.
23.2
Consent of Sonnenschein Nath & Rosenthal LLP (included in the Opinion filed as Exhibit 5.1).
24.1
Power of Attorney (included on the signature page of this registration statement).
99.1
USEC Inc. 2009 Equity Incentive Plan (incorporated by reference to Appendix A of the
Definitive Proxy Statement on Schedule 14A filed on March 19, 2009).
99.2
USEC Inc. 2009 Employee Stock Purchase Plan (incorporated by reference to Appendix B of the
Definitive Proxy Statement on Schedule 14A filed on March 19, 2009).