05000267/LER-1979-055-03, /03X-1: on 791026,during Scheduled Surveillance Testing,Check Valve V-22370 Was Found to Be Stuck Open. Cause Not Identified.Valve Was Opened & Inspected,Then Cleaned & Lubricated

/03X-1: on 791026,during Scheduled Surveillance Testing,Check Valve V-22370 Was Found to Be Stuck Open. Cause Not Identified.Valve Was Opened & Inspected,Then Cleaned & Lubricated

ML19323D016
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/09/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19323D010	List:
References
LER-79-055-03X-01, LER-79-55-3X-1, NUDOCS 8005190537
Download: ML19323D016 (1)

LER-1979-055, /03X-1: on 791026,during Scheduled Surveillance Testing,Check Valve V-22370 Was Found to Be Stuck Open. Cause Not Identified.Valve Was Opened & Inspected,Then Cleaned & Lubricated

Event date:
Report date:
2671979055R03 - NRC Website

text

NT.C FORM 366 U.S. NUCLEAR REGULATbRY COMMISSION 87 77)

[g%%

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) i e

lo lil IC 10 I r l s I V l 1 l@l 010 l-10101010 l0 l-l010 l@l4 l1 l1 1210 l@l l

l@

7 8 9 LICENSEE COCE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE Jo

$7 CAT 58 i

CON T lolil 3e[,c[ l L @l 0 l 5 l0 l 010 l 2 l 617 @ll 1012 l6 l 7 l9 l@l 0l 5l 0l 9l 8l 0l@

7 8

60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PRCBABLE CONSEQUENCES h lol2l l During scheduled surveillance testing, a check valve (V-22370) was found to be stuck

[

l o 13 l lopen. This event degraded the firewater booster pumos for helium circulator drive.

I I o I.: I l The reactor had been operated at power since the last demonstrated operability of the l l

Io!sl l booster pumps. LCO 4.2.19 recuires that one booster pump be ooerable when the reactor l 1

I o 16 I l is at power.

It must be assumed that the reactor was coerated at oower with degraded I 10171 l boos te r pucos.

There was no ef fect uoon the health or safety of the public.

Re-l l o i a I l dundant systems were available.

Reportable per Technical Soecification AC 7.5.2(b)2. I 7

g 9 80 E

CODE SUSC E COMPONENT CODE SUSC DE SU E

i lo191 l C l B l@ lE l@ lB l@ l Vl Al Ll Vl El X]h l Cl@ l Al@

l 7

S 9

10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPCRT REVISION LE A RO EVENT YEAR REPORT NO.

CCOE TYPE N O.

@ sug I 71 91 l-l l Ol 51 Sl I/l l 013 l l_XJ l-l l ll aer 21 22 23 24 26 27 23 29 30 31 32 ANON T K N O P NT VET MCURS S8 e FOR 8.

SU #L E MANUF C RER l X l@l X l@

l Z l@

l Zl@

l0l0l0l0l lYl@

l Nl@

l Nl@

lW l0 l3 l0 l @ !

33 34 35 36 31 40 41 42 43 44 47 I

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i I a l l The cause of the valve malfunction was not identified.

At the time of the event, the l l

m Ivalve was rapped sharoly which freed it for operation.

The valve was ocened and in-I 1il2l lspected, but no specific cause for sticking was found. The valve and shaf t were l

l l1l l cleaned and lubricated. The valve is a Walworth 4 inch check valve, body Model WO8 l

1iI4 i Iwith a R13 disc.

I 7

8 9 90 STA

%PCWER CTHER STATUS 315 O RY DISCOVERY CESCRIPTICN l1 l 5 l l G l@ l0 l 0 l0 l@lN/A l

l3l@lOperatorObservation l

ACTIVITY CO TENT

• ELEASED

^P RELEASE AMCUNT OF ACTIVITY LOCATION CP RELEASE li l6 l l Z j h lZ lgl N/A l

l N/A l

7 3 9 to 11 44 45 80 PERSCNNEL EXPCSURES NUMBER TYPE D ESCRIPTION l i l 71 10101 O l@l Z l@l N/A l

ER$c~~EL % u'!,ES

'2 8

NUVeER CESCRIPTICN lt la l l 0 l 0 l 0 l@l N/A l

7 8 9 11 12 80 LOSS OF CR DAMAGE TO FACILITY TY8E OESCRIPTION li 191 l Z l@l N/A l

7 d 9 10 80 NRC USE CNLY ISSUE DE CRIPTION 1:101 l N @l N/A I

IIIIIIIIIIIIli

//

(303) 785-2253