SECURITIES  &  EXCHANGE COMMISSION                       
WASHINGTON, D.C. 20549                             
SCHEDULE 13G                                  
UNDER THE SECURITIES EXCHANGE ACT OF 1934                    
(AMENDMENT NO.    1 )*                             
NAME OF ISSUER:                                                                
TITLE OF CLASS OF SECURITIES:  USEC INC                                        

UNLESS OTHERWISE NOTED, THE SECURITY BEING REPORTED IS A                    
COMMON STOCK                                                                
CUSIP NO.  90333E 10 8                                                         
FEE BEING PAID:  NO                                                           
(1) NAMES OF REPORTING PERSONS:  J.P. MORGAN & CO. INCORPORATED               
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS:  13-2625764          
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:  (A)                    
(B)                    
(3) SEC USE ONLY                                                              
(4) CITIZENSHIP OR PLACE OF ORGANIZATION:  UNITED STATES                      
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:        
(5) SOLE POWER TO VOTE:              3,217,550   SHARES              
(6) SHARED POWER TO VOTE:                    0   SHARES              
(7) SOLE POWER TO DISPOSE:           4,448,150   SHARES              
(8) SHARED POWER TO DISPOSE:                 0   SHARES              
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:             
4,449,050  SHARES             
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:        
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9):    4.56 %             
(12) TYPE OF REPORTING PERSON:  HC                                            
SECURITIES AND EXCHANGE COMMISSION                       
WASHINGTON, D.C. 20549                             
SCHEDULE 13G                                  
UNDER THE SECURITIES EXCHANGE ACT OF 1934                    
AMENDMENT NO:    1                                     DATE  OCTOBER 29, 1999   
FEE BEING PAID:  NO                                                            
ITEM 1  (A) NAME OF ISSUER:                                                     
ITEM 1  (B) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:                    
2 DEMOCRACY CENTER                                          
6903 ROCKLEDGE DRIVE                                        
BETHESDA, MD  20817                                         

ITEM 2  (A) NAME OF PERSON FILING: J.P.MORGAN & CO. INCORPORATED                
ITEM 2  (B) ADDRESS OF PRINCIPAL BUSINESS OFFICE:                               
60 WALL STREET                                    
NEW YORK,N.Y. 10260                               
ITEM 2  (C) CITIZENSHIP UNITED STATES                                           
ITEM 2  (D) TITLE OF CLASS OF SECURITIES:                                       
USEC INC                                                            

UNLESS OTHERWISE NOTED, SECURITY BEING REPORTED IS A           
COMMON STOCK.                                                  
ITEM 2  (E) CUSIP NO:   90333E 10 8                                             
ITEM 3    TYPE OF PERSON:  (G) PARENT HOLDING COMPANY                           
ITEM 4  (A) AMOUNT BENEFICIALLY OWNED:      4,449,050  SHARES,             
INCLUDING          0  SHARES WHERE THERE IS A RIGHT TO ACQUIRE.   
ITEM 4  (B) PERCENT OF CLASS:  4.56                                            
ITEM 4  (C)     (I) SOLE POWER TO VOTE:             3,217,550  SHARES           
(II) SHARED POWER TO VOTE:                   0  SHARES           
(III) SOLE POWER TO DISPOSE:          4,448,150  SHARES           
(IV) SHARED POWER TO DISPOSE:                0  SHARES           
ITEM 5    OWNERSHIP OF 5 PERCENT OR LESS OF A CLASS:   YES           
ITEM 6    OWNERSHIP OF MORE THAN 5 PERCENT ON BEHALF OF ANOTHER PERSON:         

VIRTUALLY ALL OF OUR ACCOUNTS INVOLVE OUTSIDE PERSONS WHO HAVE THE         
RIGHT TO RECEIVE OR DIRECT THE RECEIPT OF DIVIDENDS FROM,OR THE PROCEEDS        
FROM THE SALE OF, SECURITIES IN SUCH ACCOUNTS WITH RESPECT TO THE CLASS         
OF SECURITIES WHICH ARE THE SUBJECT OF THIS REPORT. HOWEVER, NO SUCH            
PERSON'S RIGHTS RELATE TO MORE THAN FIVE PERCENT OF THE CLASS UNLESS            
SUCH PERSON IS IDENTIFIED BELOW.                                                
ITEM 7  IDENTIFICATION AND CLASSIFICATION OF SUBSIDIARIES:                      
MORGAN GUARANTY TRUST COMPANY OF NEW YORK - 3(B) BANK                  
J.P. MORGAN INVESTMENT MANAGEMENT, INC. - 3(E) INVESTMENT ADVISOR      
J.P. MORGAN FLORIDA FEDERAL SAVINGS BANK - 3(E) INVESTMENT ADVISOR              
CERTAIN OF THE SECURITIES COVERED BY THIS REPORT MAY BE OWNED BY NON-        
QUALIFYING SUBSIDIARIES OF J.P. MORGAN & CO. INCORPORATED, BUT THE            
AMOUNT SO OWNED DOES NOT EXCEED ONE PERCENT OF THE TOTAL OUTSTANDING          
SECURITIES OF THE COMPANY AND IT IS NOT PRACTICAL TO OBTAIN ADDITIONAL        
INFORMATION CONCERNING SUCH SECURITIES                                        
ITEM 8  IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP               
NOT APPLICABLE                                                       
ITEM 9  NOTICE OF DISSOLUTION OF THE GROUP:  NOT APPLICABLE                     
ITEM 10 CERTIFICATION:                                                          
BY SIGNING BELOW I CERTIFY THAT, TO THE BEST OF MY KNOWLEDGE AND             
BELIEF, THE SECURITIES REFERRED TO ABOVE WERE ACQUIRED IN THE ORDINARY         
COURSE OF BUSINESS AND WERE NOT ACQUIRED FOR THE PURPOSE OF AND DO NOT         
HAVE THE EFFECT OF CHANGING OR INFLUENCING THE CONTROL OF THE ISSUER OF        
SUCH SECURITIES AND WERE NOT ACQUIRED IN CONNECTION WITH OR AS A               
PARTICIPANT IN ANY TRANSACTION HAVING SUCH PURPOSE OR EFFECT.                  
AFTER REASONABLE INQUIRY AND TO THE BEST OF MY KNOWLEDGE AND BELIEF, I       
CERTIFY THAT THE INFORMATION SET FORTH IN THIS STATEMENT IS TRUE,              
COMPLETE AND CORRECT.                                                          
JAMES C.P. BERRY                        
VICE PRESIDENT