ML20009F033

LER 81-014/03L-0:on 810608,during Testing,Hpci Pump Turbine Tripped on Overspeed Prior to Reaching Rated Sys Flow.Sys Declared Inoperable.Caused by Improper Valve line-up Procedure.Valve Throttled & Tested

ML20009F033
Person / Time
Site:	Cooper
Issue date:	06/24/1981
From:	Flannigan R NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20009F026	List: ML20009F025 ML20009F033
References
LER-81-014-03L, LER-81-14-3L, NUDOCS 8107280619
Download: ML20009F033 (1)

Text

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REPORT 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 lDuring routine surveillance testing, the HPCI pump turbine tripped on overspeed l o 3 [ prior to reaching rated system flow. The HPCI system was declared inoperative. The l g ] redundant system, ADS, was operable as were the RCIC and LPCI systems. This event I o s lis not repetitive. There were_no adverse effects on the public health and safety. I I

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3J 34 35 36 3/ 40 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O IThis occurrence was caused by an improper valve line-up procedure. The procedure I i , [ stated the HPCI trip unit oil supply valve should be "open". This valve should be l

( i,,,i [ throttled to maintain % 20 psig unit oil supply. Excessive oil pressure caused the l l j ,;3l [ turbine to trip below operating speed. The valve was throttled. The system tested j l

l i 14 l l satisfactorily. The procedure has been revised. No further action is planned. I 1 H 's 80 51  ; *.POWEH OT HE H t' f A T US 15C V Y DISCOVERY DESCHiPriON i b [gj@ l0l2l3l@l NA l LEj@l Surveillance Test l A TiVl f Y CO TENT RE LE ASE D OF RE LE ASE AVOUNT OF ACTIVITY LOC ATION OF HELE ASE i a ni l I ni I i H 9 LzJ @ Lz_l@l 10 11 44 45 80 Pt H5ONNEL E XPOSURLS l NUYBE R TYPE DESCH6PTION 39 I i i il I 'o I o I oJ@Lzj@l NA I

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402-825-3811

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