ML20084M275
| ML20084M275 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 03/15/1973 |
| From: | Schmidt A FLORIDA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20084M254 | List: |
| References | |
| AO-3-73-2, AO-3-73-3, NUDOCS 8306020075 | |
| Download: ML20084M275 (2) | |
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ICS IPMBNGZ CSP ZCZC 3142918000 TDBN MIAMI FL 03-15 0449P EST 3
PMS US ATOMIC ENERGY COMMISSION, DLR SUITE 218 233 PEACHTREE ST NW 3
ATLANTA G A FLORIDA POWER AND LIGHT COMPANY TURKEY POINT REPORTS ABNORMAL g
OCCURANCES NU"BER 3-73-2 AND 3-73-3.
DURING PERFORMANCE OF FUNCTION AL TESTING OF THE INTERGRATED 0
l LNIT 3 AND 4 SAFEGUARDS SYSTEMS, WITH UNIT 3 IN COLD SHUTDOWN AND UNIT 4 WITH NO FUEL IN THE REACTOR, THE FOLLOWING OCCURRED:
g 3-75-2: AT APPROXIMATELY 9PM MARCH 9 1975 A TEST WAS CONDUCTED WITH INITIAL CONDITIONS OF THE B DIESEL GENERATOR DISABLED AND s
3 1HE 4B 125 BDC LOAD CENTER DENERGIZED. A SIMULATED SAFETY INJECTION SIGNAL WAS IMPOSED ON UNIT 4, FOLLOWED IN ABOUT THREE SECONDS d.
r.imi ew, BY MANUAL INTERRUPTION OF ALL OFF SITE POWER TO BOTH UNITS.
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J THE ELECTRICAL AND SAFEGUARDS SYSTEMS FUNCTIONED AS EXPECTED WITH THE A DIESEL GENERATOR FURNISHING EMERGENCY POWER AND SEQUENCING ALL SAFEGUARDS LOADS ON THE A TRAIN OF UNIT 4. ON UNIT 3, THE 3A COMPONENT COOLING WATER PUMP FAILED TO START AUTOMATICALLY.
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M.L OTHER UNIT 3 EQUIPMENT FUNCTIONED AS EXPECTED FOR THE NON-ACCIDEN T UNIT. INVESTIGATION REVEALED CONTACTS IN THE BREAKER CLOSING 3
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T CIRCUIT WELDED CLOSED. THE CONTACTS WERE REPLACED AND FURTHER TESTING OF THE BREAKER CLOSING CIRCUIT DID NOT DISCLOSE ANY k
ADDITIONAL PROBLEMS.
5-73-2: AT APPROXIMATELY 3AM MARCH 10 1973 THE ABOVE TEST WAS REPEATED WITH THE 3A COMPONENT COOLING WATER PUMP OPERABLE.
I DURING THIS TEST THE A DIESEL GENERATOR FAILED TO START, RESULTING IN TOTAL LOSS OF AC POWER (EXCEPT FOR INVERTER FED INSTRUMENT AC ) TO BOTH UNITS. OFFSIGHT POWER WAS RESTORED MANUALLY AND Ek
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INVESTIGATION REVEALED THAT THE A DIESEL GENERATOR AIR STATE SOLEN 0ID VALVE HAD FAILED TO OPEN. THE SOLEN 0ID VALVE WAS REPLACED AND THE ENGINE TESTED SATI5FACTORILY. THIS PART OF THE INTEGRATED SAFEGUARDS TEST WAS THEN REPEATED WITH SATISFACTORY RESULTS.
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THERE WERE NO NUCLEAR SAFETY HAZARDS INVOLVED IN THESE OCCURANCES BECAUSE THE PLANT WAS IN A SAFE CONDITION TO ACCOMMODATE THIS TESTING.
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A D SCHMIDT DIRECTOR OF POWER RESOURCES FLORIDA POWER AND
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