ML19257C667

LER 80-001/01T-0:on 800103,w/Unit 2 at Power & Drywell Being Deinerted in Preparation for Planned Outage,Drywell Ventilation Isolation Valves AO-2521A & AO-2521B Discovered Fully Open.Caused by Lack of Procedural Control

ML19257C667
Person / Time
Site:	Peach Bottom
Issue date:	01/17/1980
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19257C663	List: ML19257C662 ML19257C667
References
LER-80-001-01T, LER-80-1-1T, NUDOCS 8001290573
Download: ML19257C667 (1)

Text

77)

. Unit.2 1.lCENSEE EVEN; REPORT aport No. 2-80-1/1T-0 CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR T ri ALL REQUIRED INFORMATioNI i e i

lil!<>I A i J I ? 13 lsl2l@lolol_lololololol_ olol@l4l1l1l1l1l@l UCEN'Ei COOE 14 IS LICENSE NUMBE*4 .' 5 26 UCENSE TYPE JO l

b7 YAf $6 Ig CN'T

'l d

i $"C !60  !@ 91015 1 01 l Gi2 00CX ET NU',it1ER 17 17 !@! 011 od u>

t o 31810 l@l 01REPORT EVENT OATE 14 75 i l iDATE l 718 0l@ d0 EVENT DESCRIPTION AND PRC0ASLE CCNdECUENCES h

>i>t I With Unit 2 at cower and the drywell being deinerted in preparation for l 3ia l a planned outage, two drywell ventilation isolation valves (AO-25211 & 1

):a 1 A0-25213) were disecvered to be fully open. During reactor operation I

~> >2 l these valves are 14-4ted to a nazirm opend.ng of 370 to insure valve I o 16 I closure within the na cirm allowable five seconds. This cccurrence is l

0 /

I retcMable under Technical Stecificatien 6.9.2a(6). I 2i, i i I d 9 30 SYSTE M CAUSE CALSE COMP. VALVE CCOE CCOE SUSCOOE CCMPONEN T COL. SuBCCOE SUSCODE 2191 d

I si n!@ IDi@ lZ l@

9 10 11 12 13 v1 Al Ll 7131 X @ 131@ I D IW 19 20 i@

cEQUEN TI AL OCCunHENCl REPORT HEviSION gga EVENT (E AA REPCRT NO. CCOE TYPE NO.

O ag,po s r

I 81 01 1-1 1 01 01 il I/I 1011I ITI l-1 0l 21 22 23 24 26 21 28 23 30 31 J2 ACTION FOTuRE EFFECT SHUTOOWN A TT ACHM E N T N P R O-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT ME' SHOO HouMS d SLe ul TT ED FOHM suu. SUPPU E R MANUFACTURER l II@l Glh l34Zl@ l Zl@

JJ 34 M l0l010l0l

^/

J . 40 l Y l@

4:

lN 42 l@ lAl@ lFl113l$l@

43 de 47 Ca'JSE CESCRIPTioN AND CcRREcTIVE ACTIONS T71 l 1 The apparent cause was lack of procedural control insuring that the 1 i

I valves are ~Mntained at less than 370 during reactor crei2tien. When I

, , j discovered, the valves were reset to lees than 37 and cautionary tags t i , have been placed on all drywell vent isolatien valve pressure regula- I i- i i tors. Procedural changes will be nade to insure proper operation. I i o so TAT  % POvvkN OTHER S T A TUS 8 C V HY 04SCOVERY OESCRIPTION T lDl@ l0i9l2l@l v;1rNr "

N/A l lAl@l Operator Observatien l

AL Tivi ry hhE AS E D OF HU.e AM LOCATION OP RREASE @

T IZl @ lZ!@if ') IQ 11 AMCUNT N/A OF ACTsVif 44 I

45 Y@I N/A 80 l

f'F ANONNF L F A PGsuRES NtJMH F H IYPE DESLHIP TION 39 y 101010,@lZl@l YA i n osom.,'< ,N,uns wuuH ,c.cHanON@ D 1ffD 'F D ljl0l010i@l N/A ll ^INbf Ol 0 l i, .no zA -""a *

, 2 t c<.5 oF oi. mw oe ro nciu ry n l 0 /_ ,J9 L v o uu wJU U U!iULL3 YvPE O t. :,CHiv f lON iR iZl@!

a if 10 N/A 60 l

s.3ygn v uvry G 8 00129 0 $ 73 NRC W ONLY * -

E "i N l@OkSGRIP*lON U l N/A /%

, l ll llll1Ili1!l}

• s tu

/' - GS 69 90 &

/ : J. Cooney ]' (215) 841-5020 g NAME OF PREPARER PHONE: ,

o

,