United States Nuclear Regulatory Commission - Protecting People and the Environment


LICENSEE: SIEMENS POWER CORPORATION          

SITE: SIEMENS POWER CORPORATION             EN NUMBER:33377

DOCKET:                                  EVENT DATE: 10-16-97

RX TYPE:                                 EVENT TIME: 12:00

VENDORS:                                NOTIFY DATE: 12-10-97

EMERGENCY CLASS: N/A  REGION: 4 STATE: WA      TIME: 11:07

OPS OFFICER: DOUG WEAVER              

10 CFR SECTION: CCCC  21.21               UNSPECIFIED PARAGRAPH



PART 21 - POTENTIAL TO EXCEED OPERATING LIMITS AT LASALLE UNIT 2 

                                                                 

SIEMENS ORIGINALLY NOTIFIED THE NRC OF THIS ISSUE WITH AN INTERIM

REPORT                                                           

DATED 10/16/97.  FURTHER EVALUATIONS OF THE INTERIM REPORT HAVE  

IDENTIFIED THE OPERATING LIMITS FOR LASALLE UNIT 2, CYCLE 8 COULD

BE EXCEEDED AT LOW POWER, HIGH FLOW, AND WITH CERTAIN EQUIPMENT  

OUT-OF-SERVICE. THE STARTUP FOR CYCLE 8 HAS BEEN DELAYED UNTIL OF

THE FALL OF 1998.  THEREFORE, THE PLANT HAS NEVER OPERATED UNDER 

THE CONDITIONS ANALYZED.  COMMONWEALTH EDISON HAS BEEN NOTIFIED  

OF THIS DEFECT AND HAS BEEN PROVIDED WITH REVISED LIMITS.        

                                                                 

THE IMPACT ON OTHER POTENTIALLY AFFECTED LICENSEES WAS EVALUATED.

 THE LICENSEE CONCLUDED THAT ALL OTHER LIMITS SUPPORTED BY SPC   

ANALYSES REMAIN APPLICABLE.                                      



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