ML20084F599

AO 250-75-4:on 750522,intake Cooling Water Pump Breaker 3A Malfunctioned.Cause Not Yet Determined.Pump Breaker Racked Out & Inspected for Damage

ML20084F599
Person / Time
Site:	Turkey Point
Issue date:	06/06/1975
From:	Schmidt A FLORIDA POWER & LIGHT CO.
To:	Rusche B Office of Nuclear Reactor Regulation
References
AO-250-75-4, NUDOCS 8304210182
Download: ML20084F599 (2)

Text

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FLORICA l'OWLR & LIGHT COYt%NY June 6, 1975 Mr. Benard C. Rusche, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 -

Dear Mr. Rusche:

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ABNORMAL OCCURRENCE NO. 250-75-4  ;.

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TURKEY POINT UNIT NO. 3 DATE OF OCCURRENCE: MAY 22, 1975 MALFUNCTION OF 3A INTAKE COOLING WATER l PUMP BREAKER l A. CONDITIONS PRIOR TO OCCURRENCE Unit No. 3 was in steady state power operation at 100% rated power. No special evolutions were in progress.

1 B. DESCRIPTION OF OCCURRENCE At about 8:10 A.M. on May 22, 1975, during a normal shifting of operating intake cooling water pumps, the 3A pump failed to start.

C. DESIGNATION OF APPARENT CAUSE OF OCCURRENCE The 3A intake cooling water pump breaker failed to remain closed. The cause of the breaker malfunction has not yet been determined.

D. ANALYSIS OF OCCURRENCE The 3A intake cooling water pump was out of service for approximately two hours. The remaining two intake cooling water pumps were operable during this time period. The Turkey Point Units No. 3 and 4 Technical Specifications permit one intake cooling water pump to be out of service for a period of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> during power operation. Section 9.6.3 of the FSAR states that one intake cooling water pump is required following a maximum hypothetical accident, therefore, the health and safety of the public was not adversely affected during this occurrence.

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