ML19210E341

LER 79-055/03L-0:on 791026,during Surveillance Testing,Check Valve V-22370 Was Stuck Open,Making Fire Water Booster Pumps Inoperable for Helium Circulator Drive.Cause Unknown.Valve to Be Opened & Inspected

ML19210E341
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/26/1979
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19210E340	List: ML19210E339 ML19210E341
References
LER-79-055-03L, LER-79-55-3L, NUDOCS 7912040363
Download: ML19210E341 (1)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 7H LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l lh , (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 7

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? 60 61 DOCKET NUM8ER EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h o 2 During scheduled surveillance testing a check valve (V-22370) was found to be stuck I o 3 jopen. This event made the fire water booster punps inoperable for helium circulator l 10 4 1 drive. The reactor had been operated at power since the last demonstrated operability l o 3 [of the booster pumps. LCO 4.2.19 requires that one booster pump be operable when the l Lo e ir eactor is at power. It must be assumed that the reactor was operated at power with- l lo 7 1 out an operable booster pump. There was no effect upon the health or safety of the j g g  ; p ublic. Redundant systems were available. Reportable per Tech. Spec. AC 7.5.2(b)2. l 90 7 8 9 CE COOE SL8C E COMPONENT COOE SL8 OCE SL E 7

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3J 34 36 31 40 el 42 43 4A 47 CAUSE CESCRIPTION ANO CORRECTIVE ACTIONS i ojIThe cause of the valve malfunction is not known at this time. At the time of the I event the valve was rapped sharply which f reed it for coeration. The v,1ve I

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, 2 lwill be opened and insoected and the results will be recorted as a sunolecent to this

, 3 l report. The valve is a Walworth 4 inch check valve, body model WO8 with a R13 disc. I i 4 1 7 8 9 80 ST  % POWER OTHER STATUS 015 RY OISCOVERY OESCllPTION i 5 l G @ l0 l0 l0 l@] N/A l l Bl@l Operator Observation l ACTIVITY CO TENT aELEASED OF RELE ASE AMOUNT CF ACTIVITY LOCATION OF RELEASE 1 6 @ y @ l N/A l N/A 7 8 9 to 11 44 45 80 PERSONNEL EXPOSURES NUM8ER TYPE OESCRIPTION 7

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