ML19224C382

LER 79-048/03L-0 on 790603:while Operating at 86% Power Increase,Average Drywell Temp Was 135.3 F.Caused by Control Rod Driveline Being Left Off During Drywell Closeout.Part Replaced.Investigations Continue

ML19224C382
Person / Time
Site:	Hatch
Issue date:	06/15/1979
From:	GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19224C379	List: ML19224C378 ML19224C382
References
LER-79-048-03L, LER-79-48-3L, NUDOCS 7907020253
Download: ML19224C382 (2)

Text

LICENSEE EVENT REPORT

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] l While onoratino at 367, ocuer increase, the averaca drvwell tercerature was discoveredj Tl to be 135.30 F. From 100.2", of its limiting value, it was reduced to 99.93 withir l l l

B l 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. This was accomplished by charcing the chilled water system with freon and j l T [_by stopping cower increases. The averac,a drywell temperature in excess of 1350 F l Dl constitutes violation of Tech. Scec. 3.6.1.7. This is a repetitive problem. See j

]l LERs 78-06 and 78-09. l B8 9L_ ___ --

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D l Folicuina this incident, the CPD access to the underside of the vessel throuch tne j e t Bl biolacical shield was discovered to have been left off during drvwell cicsecut. It i i:

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3 I was replaced, as well as repairs made on some insulation, in hopes of correctina the l lr g I problem. Investigations are still underaay as to actual cause and to determine l lt B[ future corrective action to orevent renccurrence. When a final determinatior has l d 9 80 F A:ttlTY YETHOO CF STATU5  % POWER OTHER STATUS OISCOsEHf DCCOVERv oESCP:PTION ~

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Georgia Pc.-ler Company Plant E. I. Hatch Baxley, Georgia 31513 Cause Description and Corrective Actions Cont.

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