Part 21 Report - 1997-750

LICENSEE: ABB COMBUSTION ENGINEERING SITE: ABB COMBUSTION ENGINEERING EN NUMBER:33077 DOCKET: EVENT DATE: 08-06-97 RX TYPE: EVENT TIME: 00:00 VENDORS: NOTIFY DATE: 10-13-97 EMERGENCY CLASS: N/A REGION: 1 STATE: CT TIME: 13:42 OPS OFFICER: CHAUNCEY GOULD 10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH ABB COMBUSTION REPORTED A PART 21 ON CERTAIN MODELS OF POTTER & BRUMFIELD RELAYS. THEY HAVE IDENTIFIED THE "DEFECT" AS CONTAMINATION OF LUBRICANT WHICH HAS LEAD TO THE HARDENING OF THE LUBRICANT IN CERTAIN POTTER & BRUMFIELD PRODUCTS DIVISION MDR RELAYS(MODELS "170-1" AND "7032"). THIS "DEFECT" COULD RESULT IN RELAY FAILURE. THESE RELAYS ARE USED IN THE PLANT PROTECTION SYSTEM. THERE IS ALSO THE POTENTIAL FOR RELAY MODELS "7033" AND "7034" TO FAIL TO FUNCTION CORRECTLY. THESE RELAYS HAVE BEEN SUPPLIED TO PALO VERDE 1, 2 AND 3, ARKANSAS NUCLEAR ONE UNIT 2, WATERFORD 3, AND SAN ONOFRE 2 AND 3. ABB-CE IS CURRENTLY EVALUATING POTENTIAL CORRECTIVE ACTIONS WHICH WILL BE PROVIDED TO THE UTILITIES WITH ABB-CE DESIGNED NUCLEAR STEAM SUPPLY SYSTEMS. * * * UPDATE AT 1510 BY FAX FROM HESS ENTERED BY JONES * * * POTTER & BRUMFIELD, AS OF A CONFERENCE CALL WITH ABB ON NOVEMBER 17, 1997, HAS EXTENDED THE PROBLEM TO INCLUDE ALL MDR RELAY MODELS WITH DATE CODES 93XX THROUGH 95XX. PREVIOUSLY ONLY MODELS WITH DATE CODES OF 94XX WERE THOUGHT AFFECTED. POTTER & BRUMFIELD HAS COMMITTED TO COMPLETE ITS ROOT CAUSE ANALYSIS ON THE FAILURE MECHANISM, ISSUE A WRITTEN REPORT WITH DETAILED DATE CODE IDENTIFICATION, AND RECOMMENDED CORRECTIVE ACTIONS BY DECEMBER 1, 1997. ABB-CE WILL INFORM ITS CUSTOMERS OF THIS CHANGE. THE HEADQUARTERS OPERATIONS OFFICER INFORMED R4DO (JOE TAPIA) AND NRR (VERN HODGE).

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