ML19345C520

LER 80-081/03L-0:on 801029,three MSIVs Failed Surveillance Testing of Valve Closure Time.Probably Caused by Valve Sitting Idle for 11 Months Prior to Test.Packing Adjusted

ML19345C520
Person / Time
Site:	Beaver Valley
Issue date:	11/28/1980
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345C518	List: ML19345C517 ML19345C520
References
LER-80-081-03L, LER-80-81-3L, NUDOCS 8012050416
Download: ML19345C520 (2)

Text

e.6 C F, C A M 366 IF.77)

U S NUCLE AR R E GUL AT ORY C J'.' .115SiON Y LICENSEE EVENT REPORT

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l@ (PLE ASE PRINT OR TYPE ALL REQUIREO INFO AMATION)

J o l i l l ? l A l 3 l V l S l 1 l@l 0 l 0 l- l 0 l0 l 0 l 0 l 0 l- l0 l 0 l@l 26 4 l1 l1 1111 j@l67 Car L. CENSE v eE 4 l lg i 8 9 LiCEN5EE CODE 14 'S Lic E*.5E bvSER 25 es CCN'T IOI1I [="d l L j@l 0 l 5 l 0 l 0 l 0 l 313 J 4sa }@l1 69 1012 19 l 8 l 0 l@l~5 111aE=0=

EVENT O ATE 14 l 2 I02TE 8 I 8103:l@

7 a so si OOCsETN.:vsEn EVENT DESCRIPTICN AND PACS A3LE CONSEOUENCIS h 10 ! 21 l On October 29, 1980 with the niant in hot standbv and Tav,, ?_ 515F, operational j l o i 31 I su: veillanc e tests were performed on all three MSIV's to verify valve closure tires j jo ia j l in 1 5 seconds. All three valves failed in violation of Technical Scecification i Operation continued in hot standbv ner the T.c. ,crinn s*,ca-a,* . l loislI (T.S.) 3.7.1.5.

l 0 l6 l l The health and safety of the oublic was not affected bv this incident. Nn nrevime l l 017 ] l incident of this type has occurred at this plant. I I

f a is l i 10 7 8 9 SYSTEM CAUSE C AUSE Cove \ALVE COCE COOE SLSCODE COV'ONEN T COOE S*5 CODE 569:OOE l a j ij y 3 i Sl ol@ l xi@ l Zl@ lvl Al L} Vl El Xlh l Clh l Dlh 9 to 11 12 13 58 19 20 SE OL ENTI AL OCOLAkENCE 2EFORT REvis ON

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44 47 CAUSE OESCRIPitCN AND CORRECTIVE ACTICNS h l1 icjl The probable cause of this incident is that the valves had been sittine idle fnr I i

11 lil i 11 months prior to the stroke test. After makine some packine ad4ust ents. the i

, , j ,, , l valves passed their stroke time test and were back in service on November 1. For  !

I , i 31 i future action the surveillance tect was reviced tc ~ ravan* , ~nca,,r~nca. I I

l ' 141 I 90 7 8 9 s acittyy n YETwCO OF STafv5 %80wEm OTwE 4 ST AT US Discow E RY OiSCOs ERY OESCRIPTION

], l E l W@ l 0l 01 Ol@l N/A 44 l l45 B l@l46 Surveillance test 40 l

7 3 9 "O 12 13 A;Tiverv  ; N ENT af.!atEO 08

• ELF a$E AVOUNT OF ACTiviTV LOCATION CF RELE ASE

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'. . f Attachment To LER 80-081/03L Beaver Valley Power Station h.

Duquesne Light Company L:

Docket No. 50-334 l.

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No further information is available or needed to satisfy the reporting e requirement. ~

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