05000366/LER-1979-054-03, /03L-0 on 790619:drywell Pressure Exceeded Tech Specs Limit Following Shutdown from Load Reject Test.Caused by Loss of Drywell Cooling from Tripped Chillers.Drywell Venting Returned Pressure Below Limit within 15 Minutes

/03L-0 on 790619:drywell Pressure Exceeded Tech Specs Limit Following Shutdown from Load Reject Test.Caused by Loss of Drywell Cooling from Tripped Chillers.Drywell Venting Returned Pressure Below Limit within 15 Minutes

ML19225A004
Person / Time
Site:	Hatch
Issue date:	07/06/1979
From:	Baxley S GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19224D836	List: 05000366/LER-1979-054, Forwards LER 79-054/03L-0 05000366/LER-1979-054-03, /03L-0 on 790619:drywell Pressure Exceeded Tech Specs Limit Following Shutdown from Load Reject Test.Caused by Loss of Drywell Cooling from Tripped Chillers.Drywell Venting Returned Pressure Below Limit within 15 Minutes
References
LER-79-054-03L, LER-79-54-3L, NUDOCS 7907170105
Download: ML19225A004 (1)

LER-1979-054, /03L-0 on 790619:drywell Pressure Exceeded Tech Specs Limit Following Shutdown from Load Reject Test.Caused by Loss of Drywell Cooling from Tripped Chillers.Drywell Venting Returned Pressure Below Limit within 15 Minutes

Event date:
Report date:
3661979054R03 - NRC Website

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41 CAuSE cEscaiPficN ANo CCRRECTIVE ACTIONS l Following Load Reject Test from 1001 power the Rx. Bldg. chillers tripped causing i io loss of D/W cooling. The resultant increase in D/W temperature caused an increase in ;

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Unit was already in Hot Shutdown. Drywell venting was initiated per HNP-2-1500 and Drywell pressure was < 0.75 psig within 15 minutes.

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