<SEC-DOCUMENT>0001225208-11-009336.txt : 20110309
<SEC-HEADER>0001225208-11-009336.hdr.sgml : 20110309
<ACCEPTANCE-DATETIME>20110309162004
ACCESSION NUMBER:		0001225208-11-009336
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20110308
FILED AS OF DATE:		20110309
DATE AS OF CHANGE:		20110309

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Sullivan Paul E
		CENTRAL INDEX KEY:			0001456406

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14287
		FILM NUMBER:		11675327

	MAIL ADDRESS:	
		STREET 1:		6903 ROCKLEDGE DRIVE
		CITY:			BETHESDA
		STATE:			MD
		ZIP:			20817

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			USEC INC
		CENTRAL INDEX KEY:			0001065059
		STANDARD INDUSTRIAL CLASSIFICATION:	MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
		IRS NUMBER:				522107911
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2 DEMOCRACY CENTER
		STREET 2:		6903 ROCKLEDGE DRIVE
		CITY:			BETHESDA
		STATE:			MD
		ZIP:			20817
		BUSINESS PHONE:		3015643200

	MAIL ADDRESS:	
		STREET 1:		2 DEMOCRACY CENTER
		STREET 2:		6903 ROCKLEDGE DRIVE
		CITY:			BETHESDA
		STATE:			MD
		ZIP:			20817
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2011-03-08</periodOfReport>

    <issuer>
        <issuerCik>0001065059</issuerCik>
        <issuerName>USEC INC</issuerName>
        <issuerTradingSymbol>USU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001456406</rptOwnerCik>
            <rptOwnerName>Sullivan Paul E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6903 ROCKLEDGE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BETHESDA</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20817</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>V.P., Amer. Cent.&amp; Chief Eng.</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-03-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6217.0000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.2800</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>81006.0000</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Includes 56,328 restricted issued pursuant to the Company's equity incentive plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Kerri R. Morey, Attorney-In-Fact</signatureName>
        <signatureDate>2011-03-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
