ML19347C757
| ML19347C757 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 12/16/1975 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| References | |
| AO-28-75, NUDOCS 8102130088 | |
| Download: ML19347C757 (1) | |
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ABNORMAL OCCURRENCE REPORT Big Rock Point Plant
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1.
Report No: A0-28-75, Docket 50-155 2a.
Report Date: December 16, 1975 t
2b.
Occurrence Date: December 7, 1975 3
Facility: Big Rock Point Plant, Charlevoix, Michigan
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Identification of Occurrence: Rod drive withdrawn times less than 23-second Technical Specification limit.
5 Conditions Prior to Oc'eurrence: Reactor shut down for routine rod drive system tests and other minor repairs.
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Description of Occurrence: During rod drive withdraw timing tests, lh drives exhibited withdrawal times of less than 23 seconds during testing at 170 F.
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Designation of Apparent Cause of Occurrence: Exact cause is unknown.
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Analysis of Occurrence: Based on our letters of November 1,1974 and s
July 1,1975 for a Technical Specification Change in this timing require-ment, we feel that no significant hazard exists for this deficiency.
9 Corrective Action: The drive timing valves were readjusted for proper timing prior to start-up of the reactor.
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Failure Data: Reference letters on previous timing problems April 3, 1974, May 15,197h, June 13,197h, July 19,197h and January 31, 1975 r
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flo9130028
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