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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