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Part 21 Report - 1996-541

LICENSEE: COMMONWEALTH EDISON CO. SITE: LASALLE 1 2 EN NUMBER:30999 DOCKET: 05000373 05000374 EVENT DATE: 09-11-96 RX TYPE: BWR BWR EVENT TIME: 00:01 VENDORS: GE-5 GE-5 NOTIFY DATE: 09-13-96 EMERGENCY CLASS: N/A REGION: 3 STATE: IL TIME: 10:43 OPS OFFICER: CHAUNCEY GOULD 10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH UNIT SCRAM RX INIT INITIAL MODE CURR CURRENT MODE CODE CRIT PWR PWR 1 N Y 100 POWER OPERATION 100 POWER OPERATION 2 N Y 82 POWER OPERATION 82 POWER OPERATION THE LICENSEE FOLLOWED UP ON A PROBABLE PART 21 THAT WAS SUBMITTED BY GENERAL ELECTRIC NUCLEAR ENERGY (GE-NE). THE NOTIFICATION SUBMITTED BY GE-NE PROVIDED THE RESULTS OF AN EVALUATION MADE BY GE-NE OF REPORTED FAILURES OF THE INSTANTANEOUS TRIP FUNCTION OF THE GE TYPE RMS-9 OVERCURRENT TRIP DEVICE PROGRAMMERS. THESE DEVICES WERE MANUFACTURED BY GE ELECTRICAL DISTRIBUTION AND CONTROL, AND SUPPLIED BY GE-NE AS SAFETY RELATED COMPONENTS FOR BALANCE-OF-PLANT OR UNSPECIFIED APPLICATIONS. SINCE THE APPLICATIONS AND ASSOCIATED SAFETY FUNCTIONS OF RMS-9 PROGRAMMERS SUPPLIED BY GE-NE ARE NOT KNOWN, IT IS NOT POSSIBLE FOR GE-NE TO EVALUATE THE SAFETY SIGNIFICANCE OF A POSSIBLE FAILURE. LASALLE EVALUATED THE GE REPORT AND HAS DETERMINED THAT THE DEFECT/NONCOMPLIANCE IS REPORTABLE UNDER THE REQUIREMENTS OF 10CFR21. GE-NE HAS LISTED APPROXIMATELY 27 PLANTS THAT ARE AFFECTED.

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