05000366/LER-1981-066-03, /03L-0:on 810626,while Operating at 92% Power,B Diesel Tripped During Surveillance Test HNP-2-01,diesel Generator Manual Start.Standby Svc Water Sys Would Not Deliver Rated Flow.Caused by Debris Blocking Flow to Pump

/03L-0:on 810626,while Operating at 92% Power,B Diesel Tripped During Surveillance Test HNP-2-01,diesel Generator Manual Start.Standby Svc Water Sys Would Not Deliver Rated Flow.Caused by Debris Blocking Flow to Pump

ML20009E477
Person / Time
Site:	Hatch
Issue date:	07/17/1981
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009E472	List: 05000366/LER-1981-066, Forwards LER 81-066/03L-0 05000366/LER-1981-066-03, /03L-0:on 810626,while Operating at 92% Power,B Diesel Tripped During Surveillance Test HNP-2-01,diesel Generator Manual Start.Standby Svc Water Sys Would Not Deliver Rated Flow.Caused by Debris Blocking Flow to Pump
References
LER-81-066-03L-01, LER-81-66-3L-1, NUDOCS 8107280240
Download: ML20009E477 (2)

LER-1981-066, /03L-0:on 810626,while Operating at 92% Power,B Diesel Tripped During Surveillance Test HNP-2-01,diesel Generator Manual Start.Standby Svc Water Sys Would Not Deliver Rated Flow.Caused by Debris Blocking Flow to Pump

Event date:
Report date:
3661981066R03 - NRC Website

text

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60 61 DOCKET NUMBER 68 69 EVENT DATE

.4 75 REPORT DATE 80 EVENT DESCRIPTION AND pro 8 ABLE CONSEQUEfJCES h lo 12110n 6-26-81, wi th Uni t 2 operati ng at 92% power the B diesel tripped dur-I lo laj ting performance of surveillance test HNP-2-3801, Diesel Generator Manual i l o 141 IS ta rt.

It was determined that the standby service water system would i

ITT 1 Ino t deliver rated flow to the diesel.

The' redundant source of cooling l

10 Is l Iwater was oroven ooerable for the B diesel oer Tech Specs 3.7.1.2.

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10171lsimilar event was reoorted by LER 50-366/1980-145.

There were no effectd 1018 I lon Dublic health or safety due to this event.

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JJ J4 33 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 101IInvestigation revealed debris was blocking flow into the pump.

The pump l 11 11 1Iwas removed for examination which revealed no damage.

The pumo was re-I iii2i linstalled, successfully tested for operability, and returned to service.]

,iii,iIThe unit is now in full compliance, and no further action or reporting l

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50-366/1981-066 Licensee:

Georgia Power Company Facility Name:

Edwin I. Hatch Docket #:

50-366

Narrative

Report for LER 50-366/1981-066 On 6-26-81, with Unit 2 operating at 92% power while perform-ing surveillance test HNP-2-3801, Diesel # Gen'e rator Manual diesel' 'triipl ed on high i

Start, on B diesel generator, the Bthe standby servz)ce water temperature.

It was determined that system would not deliver rated flow to the B diesel, thus unable 'to comply with Tech Specs section 3.7.1.2.C.

The standby service water system was declared inoperative, and B D/G was aligned to Unit 1 plant service water per Tech Specs section 3.7.1.2, action A.4.

Investigation revealed foreign matter was blocking _ flow into the pump. ' Divers were sent into the intake structure suction pit, and the debris was removed.

An inspection of the traveling water screens revealed damaged areas where debris could ' enter.

Work is underway to repair the screens.

The pump was examined, and no damage was found.

Subsequently the pump was retested satisf actorily and returned to service.

The unit is now in full compliance, and no furth-er action or reporting is required.

A similar event was last reported by LER 50-366/1980-145.

There were no effects on public health or safety due to this event.

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