Part 21 Report - 1998-200

LICENSEE: ILLINOIS POWER CO. SITE: CLINTON 1 EN NUMBER:33668 DOCKET: 05000461 EVENT DATE: 02-06-98 RX TYPE: BWR EVENT TIME: 00:00 VENDORS: GE-6 NOTIFY DATE: 02-06-98 EMERGENCY CLASS: N/A REGION: 3 STATE: IL TIME: 11:23 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 N 0 REFUELING 0 REFUELING 10CFR PART 21 REPORT - THE LICENSEE INITIATED CONDITION REPORT #1-97-12-165 DUE TO OIL LEAKING AROUND THE DIAPHRAGM OF A REPLACEMENT PRESSURE REDUCING/DUMP VALVE (PART #NS108916A) INSTALLED ON AN ITT BARTON HYDRAMOTOR ACTUATOR. THIS WAS DISCOVERED PRIOR TO DECLARING THE HYDRAMOTOR OPERABLE DURING POST MAINTENANCE TESTING OF THE HYDRAMOTOR TO DETERMINE IF THE ASSOCIATED DAMPER MET ITS REQUIRED CLOSING TIME. HYDRAMOTORS ARE USED AT CLINTON TO OPERATE SAFETY-RELATED DAMPERS IN VENTILATION SYSTEMS. TWO ADDITIONAL PRESSURE REDUCING/DUMP VALVES WERE REMOVED FROM THE STOREROOM AND BENCH TESTED WITH LEAKAGE RESULTS ON ONE OF THE VALVES BEING SIMILAR TO THE VALVE INSTALLED ON THE HYDRAMOTOR IN THE PLANT. THE OTHER VALVE, HOWEVER, SUCCESSFULLY PASSED THE TEST. FURTHER INVESTIGATION INTO THIS CONDITION REVEALED THAT THE PROBLEM WITH THE PRESSURE REDUCING/DUMP VALVE COULD CAUSE THE HYDRAMOTOR TO CLOSE THE DAMPER SLOWER THAN THE DESIGN TIME REQUIRED. THIS IS CONTRARY TO THE PURCHASE SPECIFICATION FOR THE HYDRAMOTOR WHICH SPECIFIES A REQUIRED DAMPER CLOSING TIME. THE 15 REMAINING VALVES IN THE STOREROOM WILL ALSO BE TESTED. ON THE BASIS THAT THE PRESSURE REDUCING/DUMP VALVE DOES NOT MEET THE REQUIREMENT OF THE PROCUREMENT DOCUMENT AND THAT ITS DEFICIENCY (WHICH APPEARS TO BE DUE TO POOR MACHINING OR WORKMANSHIP) COULD CAUSE A SAFETY- RELATED ISOLATION DAMPER TO MALFUNCTION, THE LICENSEE HAS CONCLUDED THAT THIS ISSUE IS A 10CFR PART 21.

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