UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                         (Amendment No. _____________)*


                                    USEC INC.
                                (Name of Issuer)

                          Common Stock, $.10 par value
                         (Title of Class of Securities)

                                    90333E108
                                 (CUSIP Number)

                                January 25, 2005
             (Date of Event Which Requires Filing of this Statement)


            Check the appropriate box to designate the rule pursuant
                        to which this Schedule is filed:

                                [ ] Rule 13d-1(b)
                                [X] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)



*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).




CUSIP No. 90333E108
-----------------------------------------------------------------------------
     (1) NAME OF REPORTING PERSON
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) King
         Street Capital, L.P.
         13-3812174
-----------------------------------------------------------------------------
     (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                    (a) [ ]
                                                                    (b) [x]
-----------------------------------------------------------------------------
     (3) SEC USE ONLY

-----------------------------------------------------------------------------
     (4)       CITIZENSHIP OR PLACE OF ORGANIZATION
                      Delaware
-----------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES
               -------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    1,641,295
OWNED BY       _____________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ______________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    1,641,295
-----------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          1,641,295
-----------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                             [ ]
-----------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          1.94%
-----------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
          PN
-----------------------------------------------------------------------------





CUSIP No. 90333E108
-----------------------------------------------------------------------------
     (1) NAME OF REPORTING PERSON
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
         King Street Capital, Ltd.
-----------------------------------------------------------------------------
     (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                    (a) [ ]
                                                                    (b) [x]
-----------------------------------------------------------------------------
     (3) SEC USE ONLY

-----------------------------------------------------------------------------
     (4) CITIZENSHIP OR PLACE OF ORGANIZATION
                British Virgin Islands
-----------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES
               -------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    3,520,205
OWNED BY       _____________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ______________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    3,520,205
-----------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          3,520,205
-----------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                             [ ]
-----------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          4.16%
-----------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
          CO
-----------------------------------------------------------------------------





CUSIP No. 90333E108
-----------------------------------------------------------------------------
     (1) NAME OF REPORTING PERSON
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
         King Street Advisors, L.L.C.
         13-3812173
-----------------------------------------------------------------------------
     (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                    (a) [ ]
                                                                    (b) [x]
-----------------------------------------------------------------------------
     (3) SEC USE ONLY

-----------------------------------------------------------------------------
     (4)       CITIZENSHIP OR PLACE OF ORGANIZATION
                   Delaware
-----------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES
               -------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    1,641,295
OWNED BY       _____________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ______________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    1,641,295
-----------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          1,641,295
-----------------------------------------------------------------------------
    (10) CHECK BOX IF THE AGGREGATE AMOUNT
         IN ROW (9) EXCLUDES CERTAIN SHARES                             [ ]
-----------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          1.94%
-----------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
          OO, IA
-----------------------------------------------------------------------------





CUSIP No. 90333E108
-----------------------------------------------------------------------------
     (1) NAME OF REPORTING PERSON
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
         King Street Capital Management, L.L.C.
         13-3978904
-----------------------------------------------------------------------------
     (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                    (a) [ ]
                                                                    (b) [x]
-----------------------------------------------------------------------------
     (3) SEC USE ONLY

-----------------------------------------------------------------------------
     (4)       CITIZENSHIP OR PLACE OF ORGANIZATION
                    Delaware
-----------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES
               -------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    5,161,500
OWNED BY       _____________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ______________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    5,161,500
-----------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          5,161,500
-----------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                             [ ]
-----------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          6.10%
-----------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
          OO, IA
-----------------------------------------------------------------------------





CUSIP No. 90333E108
-----------------------------------------------------------------------------
     (1) NAME OF REPORTING PERSON
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
         O. Francis Biondi, Jr.
-----------------------------------------------------------------------------
     (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                    (a) [ ]
                                                                    (b) [x]
-----------------------------------------------------------------------------
     (3) SEC USE ONLY

-----------------------------------------------------------------------------
     (4) CITIZENSHIP OR PLACE OF ORGANIZATION
              United States of America
-----------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES
               -------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    5,161,500
OWNED BY       _____________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ______________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    5,161,500
-----------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          5,161,500
-----------------------------------------------------------------------------
    (10) CHECK BOX IF THE AGGREGATE AMOUNT
         IN ROW (9) EXCLUDES CERTAIN SHARES                             [ ]
-----------------------------------------------------------------------------
    (11) PERCENT OF CLASS REPRESENTED
         BY AMOUNT IN ROW (9)
         6.10%
-----------------------------------------------------------------------------
    (12) TYPE OF REPORTING PERSON
         IN
-----------------------------------------------------------------------------





CUSIP No. 90333E108
-----------------------------------------------------------------------------
     (1) NAME OF REPORTING PERSON
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
         Brian J.Higgins
-----------------------------------------------------------------------------
     (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                    (a) [ ]
                                                                    (b) [x]
-----------------------------------------------------------------------------
     (3) SEC USE ONLY

-----------------------------------------------------------------------------
     (4)       CITIZENSHIP OR PLACE OF ORGANIZATION
                    United States of America
-----------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES
               -------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    5,161,500
OWNED BY       _____________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ______________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    5,161,500
-----------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          5,161,500
-----------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                             [ ]
-----------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
          6.10%
-----------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
          IN
-----------------------------------------------------------------------------





ITEM 1(a).  NAME OF ISSUER:
            USEC Inc.

ITEM 1(b).  ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
            2 Democracy Center
            6903 Rockledge Drive
            Bethesda, Maryland 20817

Item 2(a).  Name of Person Filing:

            This schedule is being jointly filed by King Street Capital, L.P.
("KSC L.P."), King Street Capital Ltd. ("KSC Ltd."), King Street Advisors,
L.L.C. ("KSA"), King Street Capital Management, L.L.C. ("KSCM"), O. Francis
Biondi, Jr. and Brian J. Higgins.  KSC L.P., KSC Ltd., KSA, KSCM and Messrs.
Biondi and Higgins are collectively referred to herein as "Reporting Persons".

      (b). Address of Principal Business Office, or if None, Residence:

           The principal business address of KSC Ltd. is:

           c/o HWR Services
           Craigmuir Chambers
           P.O. Box 71
           Road Town, Tortola
           British Virgin Islands

           The principal business address of each of the other Reporting
           Persons is:

           65 East 55th Street
           30th Floor
           New York, New York 10022

      (c). Citizenship:

            Messrs. Biondi and Higgins are both United States citizens. KSC Ltd.
is organized under the laws of the British Virgin Islands. Each of the other
Reporting Persons is organized under the laws of the State of Delaware, U.S.A.

ITEM 2(d). TITLE OF CLASS OF SECURITIES: Common Stock, par value $.10 per
share (the "Common Stock").

ITEM 2(e).  CUSIP NUMBER: 90333E108

ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO 13d-1(b) OR 13d-2(b) OR (c),
CHECK WHETHER THE PERSON FILING IS A:

          (a)       [ ] Broker or dealer registered under Section 15 of the Act

          (b)       [ ] Bank as defined in Section 3(a)(6) of the Act

          (c)       [ ] Insurance Company as defined in Section 3(a)(19) of






                        the Act

          (d)       [ ] Investment Company registered under Section 8 of the
                        Investment Company Act of 1940

          (e)       [ ] Investment Adviser registered under Section 203 of the
                        Investment Advisers Act of 1940: see Rule 13d-
                        1(b)(1)(ii)(E)

          (f) [ ] Employee Benefit Plan, Pension Fund which is subject to the
                  provisions of the Employee Retirement Income Security Act of
                  1974 or Endowment Fund; see Rule 13d-1(b)(1)(ii)(F)

          (g) [ ] Parent Holding Company, in accordance with Rule 13d-
                  1(b)(ii)(G);

          (h) [ ] Savings Associations as defined in Section 3(b) of the
                  Federal Deposit Insurance Act;

          (i) [ ] Church Plan that is excluded from the definition of an
                  investment company under Section 3(c)(14) of the Investment
                  Company Act of 1940;

          (j) [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

ITEM 4.   OWNERSHIP.

KSC L.P. AND KSC LTD.:
---------------------

      As of January 25, 2005, 1,641,295 shares of Common Stock, or 1.94% of the
total outstanding shares of Common Stock on that date, were held by KSC L.P. and
3,520,205 shares of Common Stock, or 4.16% of the total outstanding shares of
Common Stock on that date, were held by KSC Ltd.

      KSC L.P. may be deemed to have shared voting and dispositive power over
the 1,641,295 shares of Common Stock it owns, or 1.94% of the total outstanding
shares of Common Stock. KSC Ltd. may be deemed to have shared voting and
dispositive power over the 3,520,205 shares of Common Stock it owns, or 4.16% of
the total outstanding shares of Common Stock.

KSA:
----

      Because KSA is the general partner of KSC L.P., pursuant to Rule 13d-1,
as of January 25, 2005, KSA may be deemed to be the beneficial owner of
1,641,295 share of Common Stock, or 1.94% of the total outstanding shares of
Common Stock on that date, consisting of the shares owned by KSC L.P.

      Because of the relationship described above, KSA may be deemed to have
shared voting and dispositive power over the 1,641,295 shares of Common Stock
Stock, or 1.94% of the total outstanding share of Common Stock.

KSCM:
-----

      Because KSCM is the investment adviser to KSC Ltd. and has been




delegated certain investment advisory responsibilities by KSA on behalf of KSC
L.P., pursuant to Rule 13d-1, as of January 25, 2005, KSCM may be deemed to be
the beneficial owner of 5,161,500 shares of Common Stock, or 6.10% of the total
outstanding shares of Common Stock on that date, consisting of the shares owned
by KSC L.P. and KSC Ltd.

      Because of the relationship described above, KSCM may be deemed to have
shared voting and dispositive power over the 5,161,500 shares of Common Stock,
or 6.10% of the total outstanding shares of Common Stock.

O. FRANCIS BIONDI, JR.:
-----------------------

      Because Mr. Biondi is a managing member of both KSA and KSCM, pursuant
to Rule 13d-1, as of January 25, 2005, Mr. Biondi may be deemed to be the
beneficial owner of 5,161,500 shares of Common Stock, or 6.10% of the total
outstanding shares of Common Stock on that date, consisting of the shares owned
by KSC L.P. and KSC Ltd.

      Because of the relationship described above, Mr. Biondi may be deemed to
have shared voting and dispositive power over an aggregate of 5,161,500 shares
of Common Stock, or 6.10% of the total outstanding shares of Common Stock,
consisting of shares owned by KSC L.P. and KSC Ltd.

BRIAN J. HIGGINS:
-----------------

      Because Mr. Higgins is a managing member of both KSA and KSCM, pursuant
to Rule 13d-1, as of January 25, 2005, Mr. Higgins may be deemed to be the
beneficial owner of 5,161,500 shares of Common Stock, or 6.10% of the total
outstanding shares of Common Stock on that date, consisting of the shares owned
by KSC L.P. and KSC Ltd.

      Because of the relationship described above, Mr. Higgins may be deemed to
have shared voting and dispositive power over an aggregate of 5,161,500 shares
of Common Stock, or 6.10% of the total outstanding shares of Common Stock,
consisting of shares owned by KSC L.P. and KSC Ltd.

      Because of the relationships described above, the Reporting Persons may be
deemed to constitute a "group" within the meaning of Rule 13d-5 under the
Securities and Exchange Act of 1934, and as such, each member of the group would
be deemed to beneficially own, in the aggregate, all of the shares of
the Common Stock held by members of the group. The Reporting Persons do not
admit that they constitute a group within the meaning of Rule 13d-5.

ITEM 5.   OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
          If  this statement is being filed to report the fact that as of the
          date hereof the reporting person has ceased to be the beneficial
          owner of more than five percent of the class of securities, check
          the following [ ].
          Not applicable.

ITEM 6.   OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
          See Item 4.

ITEM      7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
          THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.





          Not applicable.

ITEM 8.   IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
          Not applicable.

ITEM 9.   NOTICE OF DISSOLUTION OF GROUP.
          Not applicable.

ITEM 10.  CERTIFICATION.  (if filing pursuant to Rule 13d-1(c))

          Each of the Reporting Persons hereby make the following certification:

          By signing below each Reporting Person certifies that, to the best of
its knowledge and belief, the securities referred to above were not acquired and
are not held for the purpose of or with the effect of changing or influencing
the control of the issuer of the securities and were not acquired and not held
in connection with or as a participant in any transaction having that purpose or
effect.





                                   SIGNATURES

      After reasonable inquiry and to the best of our knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated: February 4, 2005
      --------------------

King Street Capital, L.P.*
By: King Street Advisors, L.L.C.,
      its general partner

By: /s/ Brian J. Higgins
    ------------------------
Name: Brian J. Higgins
Title: Managing Member


King Street Capital, Ltd.*
By: King Street Capital Management, L.L.C.

By: /s/ Brian J. Higgins
    ------------------------
Name: Brian J. Higgins
Title: Managing Member


King Street Advisors, L.L.C.*

By: /s/ Brian J. Higgins
    ------------------------
Name: Brian J. Higgins
Title: Managing Member


King Street Capital Management, L.L.C.*

By: /s/ Brian J. Higgins
    ------------------------
Name: Brian J. Higgins
Title: Managing Member


/s/ Brian J. Higgins
--------------------------
    Brian J. Higgins*


/s/ O. Francis Biondi, Jr.
- ----------------------------
    O. Francis Biondi, Jr.*





* The Reporting Persons disclaim beneficial ownership over the Common Stock
reported herein except to the extent of its or his pecuniary interest therein.

The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative other than an executive
officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
this statement, provided, however, that a power of attorney, for this purpose
which is already on file with the Commission may be incorporated by
reference. The name and any title of each person who signs the statement shall
be typed or printed beneath his signature.

Note. Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See s.240.13d-7 for other
parties for whom copies are to be sent.

Attention. Intentional misstatements or omissions of fact constitute federal
criminal violations (see 18 U.S.C. 1001).