ML20024B722

LER 83-015/03L-0:on 830606,during Valve Timing Test for Td Auxiliary Feedwater Pump,Valve Failed to Electrically Open. Caused by Faulty Torque Switch & Maladjusted Tripper Cam. Valve Operator Rebuilt & Cam reset.W/830701 Ltr

ML20024B722
Person / Time
Site:	Kewaunee
Issue date:	07/01/1983
From:	Bernhoft S, Giesler C, Thorgersen J WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
CON-NRC-83-128 LER-83-015-03L, LER-83-15-3L, NUDOCS 8307110277
Download: ML20024B722 (2)

Text

. LICENSEE EVENT REPORT

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(PLEASE PRINT OR TVPE ALL REQUIRED INFORMATIONI lo lil# l9 WlIlK

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5 60 69 DOC K E T N UM H E H be 69 EVENT DATE 74 75 HEPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l o 121 l During full power operation, af ter adjusting the packing on MS-100B on main steam I jo93l l header 1B to the TDAFW pump, a valve timing test was attempted. The valve cycled l l o g.i ; l closed but failed to open until it was manually cycled off its seat. This required I joj3j gthe valve to be taken out of service to perform corrective maintenance. This placed l loisj [the plant in an LC0 per T.3.3.4~.b and is reportable per T.S.6.9.2.b(2). Since steam [

l 0 l 7 l lwas available to the TDAFW pump via main steam header 1A, there was no effect on the l

,g,3y , health and safety of the public or plant operation. l OE C DE SUBCO E COMPONENT CODE SUBC DE SU DE lo19]

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35 36 3/ 41 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l i j o l l Failure of the valve to open electrically was due to a faulty torque switch and the l li li ; [ tripper cam being out of adjustment. The valve operator was rebuilt, the tripper cam I

, ,,,, l reset, and the torque switch replaced. The valve operator was then reinstalled, tested, I land returned to operation within T.S. time limits. No further action is required. l 11 141 I l 7 8 9 g

STA JS  % POWER oTHER STA TUS ISC RY DISCOVERY DESCHtPTION l l 5) l E lh l 1 l 0 l 0 lhl NA l l A lhl Valve Cycle Timing Test l ACTIVITY CO TENT RELE ASED OF HELEASE AMOUNT oF ACTIVITY (OCATICN oF RELEASE li lGg l9 l Z l h l10Z lhl NA p

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PERSONNEL EXPOSURES 80 NUMBER TYPE DESCntPTION i i l 0 l0 [0 l@]@l '

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PEnsONNEL mJU IES NuverH OESCRIPTION NA lt la8 l9 [0 l0 l0 Ql p

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Lo0S OF OR DAMAGE To FACILITY 8 TYPF DESCHIFilON i 9 [Zj@lNA_

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• PHONE- -

NRC-83-128 WISCONSIN P U B LIC S ERVICE CORPORATIO N RO. Box 1200, Green Bay, Wisconsin 54305 July 1, 1983 Mr. J. G. Keppler, Regional Administrator Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr. Keppler:

Docket 50-305 Operating License DPR-43 Reportable Occurrence 83-015/03L-0 In accordance with the requirements of the Technical Specifications, Section 6.9, the attached Licensee Event Report for reportable occurrence 83-015/03L-0 is being submitted.

Very tru y yours, c/2 C. W. Giesler Vice President - Nuclear Power js Attach, cc - Dir, Office of Inspection & Enforcement US NRC, Washington, DC 20555 Dir, Office of Mgt Info & Program Control US NRC, Washington, DC 20555 INP0 Records Center Suite 1500, 1100 Circle 75 Parkway Atlanta, GA 30339 Mr. Robert Nelson, NRC Resident Inspector RR #1, Box 999, Kewaunee, WI 54216 Mr. S. A. Varga, Chief US NRC, Washington, DC 20555 5.fM t \

AR. 6