ML19350A198
| ML19350A198 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 03/20/1975 |
| From: | Sewell R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| AO-08-75, AO-8-75, NUDOCS 8103110761 | |
| Download: ML19350A198 (2) | |
Text
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RE:
DOCKET 50-155 THIS ABNORMAL OCCURRENCE REPORT A0-08-75 IS BEIhG SENT TO YOU TO
[j p CONFIRM THE TELEPHONE CALL TO' D. KILEY AT 1500 ON MARCH '19,' 1975 BY D. E. DE MOOR.
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- 1. REPORT NO A0-08-75 DOCKET 50-155 l 1 l
O u.,=, our REPORT DATE - MARCH 20, 1975 i,
2B.
OCCURRENCE DATE - MARCH 18, 1975 - CLASSIFIED AS ABNORMAL OC-CURRENCE ON MARCH 19, 1975.
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FACILITY - BIG ROCK P0' INT PLANT, CHARLEVOIX, MICHIGAN l :
4.
IDENTIFICATION OF OCCURRENCE - CONTAINMENT VENTILATION SUPPLY
ALVE LEAK TEST FAILURE.
5.
CONDITION PRIOR TO OCCURRENCE - PLAhT IN COLD SHUTDOWN FOR MAINTENANCE AND TESTING.
l 6.
DESCRIPTION OF OCCURRENCE - DURING THE SEMIANNUAL COMPONENT 1
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,,,,, Q K RATE TESTING OF THE SPHERE VENTILATION SUPPLY VALVES, EXCES-l Plo300 %
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SIVE LEAKAGE WAS NOTED.
PACKING LEAKS WERE SUSPECTED ON THE OUTER SUPPLY VALVE CV-4096.
HOWEVER, PACKING ADJUSTMENT OF CV-4096 AND
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RETESTING INDICATES THAT THE PROBABLE SOURCE OF LEAKAGE IS ASSOCI-ATED WITH THE INNER SUPPLY VALVE CV-4097 SEAT.
INVESTIGATION IS CONTINUING THIS DATE.
7, 7.
DESIGNATION OF APPARENT CAUSE OF OCCURRENJF, - EXACT CAUSE UN-O KNOWN AT THIS TIME.
O 8.
ANALYSIS OF' OCCURRENCE - TESTING TO DATE INDICATES THAT ONLY' ONE OF THE TWO VALVES IN SERIES HAS EXCESSIVE LEAKAGE AT THE VALVE. SEAT UNDER SUCH CONDITIONS," THE CONTAINMENT INTEGRITY WOULD REMAIN INTACT
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AND NO UNDUE HAZARDS EXIST.,
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9.
CORRECTIVE ACTION - INVESTIGATION CONTINUING.
CC:
DIV 0F REACTOR LICENSING, USNRC, WASH i
C J HARTMAN, BIG ROCK POINT I
R B SEWELL NUCLEAR LICENSING ADM CONSUMERS POWER CO ALL H0 i
NNNN MAR 2 4 1975 sF tact (R549)