05000321/LER-1982-043

LER 82-043/03L-0:on 820505,RHR Svc Water Pump 1E11-C001C Failed to Meet Flow & Discharge Pressure Requirements. Caused by Debris Entering Pump & Becoming Lodged in Impellers.Screens Repaired

ML20054G535
Person / Time
Site:	Hatch
Issue date:	06/04/1982
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20054G534	List: 05000321/LER-1982-043, Forwards LER 82-043/03L-0
References
LER-82-043-03L-01, LER-82-43-3L-1, NUDOCS 8206210660
Download: ML20054G535 (2)

LER-2082-043,

Event date:
Report date:
3212082043R00 - NRC Website

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EVENT DESCHIPTioN AND PROBABLE CONSEQUENCES h El On May 5,1982, with the reactor in cold shutdown, Residual Heat Removal I gl Service Water Pump 1E11-C001C failed to meet flow and discharge pressure l gi requirements as oatlined in Tech Specs Section 4.5.C.1.b. The redundant I gi pumps were operable. Plant operation nor public health and safety were I gl a f fected. This is a repetitive event as last reported on Reportable l gl Occurrence Report No. 50-321/1982-040. I EI g 9 80 I

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43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h pl The failure was due to debris entering the pump and becoming lodged in l gl the impellers. The source of debris is attributed to maintenance work i gi in the area and the breakdown of traveling water screens. The screens l gg were repaired and improved methods for securing materials were implemented. l Divers were contracted to remove debris from the suction pit. l 8 9 80 ST S  % POWE R OTHER STATUS DISCOV RY DISCOVERY DESCRIPTION Inservice Inspection and Surveillance l E lHl@ l010l0l@l NA l l8l@l A TIVITY CO TENT HELEA$t OF HE LE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE E W @D [Zjgl 10 NA 44 l l 45 NA 80 l

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LER No. : 50-321/1982-043 Licensee: Georgia Power Company

~ Facility: Edwin I. Hatch Docket No.: 50-321 Narrative Report.

for LER 50-321/1982-043.

On May 5,1982, RHR Service Water _ Pump-(RHRSW) Pump,- 1E11-C001C, was being tested per HNP-1-3167, RHR Service Water Pump Operability and Rated Flow',

during a scheduled inservice inspection.

The performance of HNP-1-3167 showed that RHRSU Pump 1E11-C001C would not meet the rated flow and system head requirements of Tech Specs Section 4.5.C.1.b (at least 4000 GPM at a system head of at'least 847 feet. For the river level -existing on fiay 5,1982, this was equivalent to at least -

4000 GPM at a pump discharge pressure of at least- 350 PSIG. The results of the test on pump IEll-C001C were 2939 GPM at 235 PSIG.

The failure of RHRSU Pump IE11-C001C to meet rated flow and system head requirements was due to debris lodged in the impellers. The source of the debris has been attributed to maintenance activities in the area and the breakdown of traveling water screens. Improved methods for securing maintenance materials were implemented and the screens repaired. Divers were contracted to inspect and remove debris from the suction pit. The pump was pulled and rebuilt (refer to MR 1-82-2409). The pump was then reinstalled and successfully retested per HNP-1-3167. Retest data, taken on May 12, 1982, showed 4025 GPM at a discharge pressure of 380 PSIG (acceptance criteria: at least 4000 GPM at at least 347 PSIG).

This is a repetitive event as last reported on Reportable Occurrence Report No. 50-321/1982-040. There were no effects on public health or safety due to this event.