ML19250A804

LER 79-124/03L-0:on 790920,quench Spray Pump 1-QS-P-1A Was Removed from Svc to Repair Leak in Downstream Flow Element. Caused by Deteriorated Gaskets at Flanges.Flex Gaskets Replaced & Pump Tested & Returned to Svc

ML19250A804
Person / Time
Site:	North Anna
Issue date:	10/19/1979
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19250A788	List: ML19250A787 ML19250A794 ML19250A804
References
LER-79-124-03L, LER-79-124-3L, NUDOCS 7910240630
Download: ML19250A804 (2)

Text

NRC FORM 366 . U L AR REGULATORY COMMISSI N (7 77) -

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lO12IlOn September 20, 1979, during Mode 1 operation, quench spray pump 1-0S-P-1 A was I o a i removed from service to repair a leak in the downstream flow element. This action i O i4, resulted in the inoperability of the Train A quench spray subsystem which is contrarv i 10 i s i to T.S. 3.6.2.1 and reportable pursuant to T.S. 6.9.1.9.b. The public health and i O s isafety were not affected because the system was restored to operable status within 1 j o l 7 l l the time limit allowed by the ACTION Statement. I O a i l C E CODE S OCO E COMPONENT CODE SUSC DE S E t o_19 ] ISIB @ LE j@ LX_j @ l P l I P l E l X l X l@ W@ l Z20 ,l @

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34 35 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i o l Flow element FE-0S101A leaked because of deteriorated aaskets at the flances. The l i i l flex gaskets were replaced and the quench spray pump was satisfactorily tested and I i 2 Ireturned to service.

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. R. Cartwright psoye: 703-894-5151 2,

Virginia Electric and Power Company North Anna Power Station, Unit #1

Attachment:

Page 1 of 1 Docket No. 50-338 Report No. LER 79-124/03L-0 Description of Event On September 20, 1979, during steady state operation at 70% power, quench spray pump 1-QS-P-1A was removed from service to repair a leak in the flow element downstream of the pump. This action rendered the Train A quench spray subsystem inoperable which is contrary to T.S. 3.6.2.1.

Probable Consequences of Occurrence The consequences of this event were limited because the Train A quench spray subsystem was returned to operable status within the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> time limit allowed by the ACTION statement and because the Train B quench spray subsystem remained operable to depressurize the containment if required. As a result, the health and safety of the general public were not endangered by this event.

There are no generic implications associated with this occurrence.

Cause of Occurrence The leak in flow element FE-QS101A was caused by deteriorated flex gaskets at the flanges.

Immediate Corrective Action The flex gaskets at the flanges of the flow element were replaced and the quench spray pump was satisfactorily tested and returned to service.

Scheduled Corrective Action No scheduled corrective action is required.

Actions Taken to Prevent Recurrencee No further actions are required.

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