Part 21 Report - 1996-310

FITZPATRICK 1 30149 03-21-96 POW LICENSEE: NEW YORK POWER AUTHORITY SITE: FITZPATRICK 1 EN NUMBER:30149 DOCKET: 05000333 EVENT DATE: 03-21-96 RX TYPE: BWR EVENT TIME: 14:00 VENDORS: GE-4 NOTIFY DATE: 03-21-96 EMERGENCY CLASS: N/A REGION: 1 STATE: NY TIME: 15:43 OPS OFFICER: LEIGH TROCINE 10 CFR SECTION: AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION UNIT SCRAM RX INIT INITIAL MODE CURR CURRENT MODE CODE CRIT PWR PWR 1 N Y 100 POWER OPERATION 100 POWER OPERATION POTENTIAL FOR CIRCUIT BREAKER SPRING CHARGING MOTOR LIMIT SWITCH FAILURES TO AFFECT 4 KV CIRCUIT BREAKERS IN BOTH SAFETY DIVISIONS ON FEBRUARY 12, 1996, FAILURES OF CIRCUIT BREAKER SPRING CHARGING MOTOR LIMIT SWITCHES CAUSED THE CIRCUIT BREAKERS FOR RESIDUAL HEAT REMOVAL SERVICE WATER PUMPS 'A' AND 'C' TO FAIL TO CLOSE. UPON EVALUATION OF THESE FAILURES FOR POTENTIAL 10 CFR PART 21 REPORTABILITY, THE LICENSEE CONCLUDED (AT 1400 ON MARCH 21, 1996) THAT THE FAILURE OF THESE LIMIT SWITCHES HAD THE POTENTIAL TO AFFECT 4 KV CIRCUIT BREAKERS IN BOTH SAFETY DIVISIONS. THE FAILED LIMIT SWITCHES WERE DAMAGED DUE TO INTERRUPTION OF A DIRECT CURRENT INDUCTIVE LOAD CIRCUIT WITH APPROXIMATELY 6 AMPS CURRENT COMPARED TO A GENERAL ELECTRIC SALES CATALOG LISTING OF 2.2 AMPS. GENERAL ELECTRIC HAS REPORTED ADEQUATE LIFE TESTING FOR THESE SWITCHES. HOWEVER, THE FAILED LIMIT SWITCH CONTACTS HAD BEEN OPERATED ONLY 2,163 AND 3,233 TIMES IN LIEU OF THE 10,000 TIMES THAT GENERAL ELECTRIC WAS CERTIFYING. SHORTLY AFTER THESE FAILURES OCCURRED, THE LICENSEE TESTED THE PUMPS ON THE OPPOSITE TRAIN WITH SATISFACTORY RESULTS. BECAUSE ONLY ONE TRAIN WAS INOPERABLE, THE UNIT ENTERED A 7 DAY TECHNICAL SPECIFICATION LIMITING CONDITION FOR OPERATION. THE LICENSEE SUBSEQUENTLY DETERMINED THAT 4 KV CIRCUIT BREAKERS THAT WERE USED IN OTHER SAFETY RELATED APPLICATIONS WERE POTENTIALLY AFFECTED. AS A RESULT, THE LICENSEE REPLACED THE LIMIT SWITCH CONTACTS IN THE FAILED CIRCUIT BREAKERS AND IN 6 OTHERS WHICH HAD MORE THAN 1,500 CYCLES. (THIS 1,500 CYCLE THRESHOLD WAS DETERMINED BY AN ENGINEERING EVALUATION.) PREVIOUS FAILURES HAD NOT BEEN OBSERVED. THERE ARE NO CURRENT TECHNICAL SPECIFICATION LIMITING CONDITIONS FOR OPERATION ASSOCIATED WITH THIS ISSUE. THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR AND PLANS TO SUBMIT A LICENSEE EVENT REPORT IN ACCORDANCE WITH 10 CFR 50.73. THE LICENSEE BELIEVES THAT THIS WILL ALSO FULFILL THE REPORTING REQUIREMENTS OF 10 CFR PART 21.

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