05000277/LER-1980-001-01, /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

From kanterella
(Redirected from ML19257C667)
Jump to navigation Jump to search
/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 Constellation icon.png
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:
References
LER-80-001-01T, LER-80-1-1T, NUDOCS 8001290573
Download: ML19257C667 (1)


LER-1980-001, /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
Event date:
Report date:
2771980001R01 - NRC Website

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 lil!<>I A I ? 13 lsl2l@lolol_lololololol_ olol@l4l1l1l1l1l@l l

Ig i

i J UCEN'Ei COOE 14 IS LICENSE NUMBE*4

.' 5 26 UCENSE TYPE JO b7 YAf $6 CN'T

'l i

$"C !

!@ 015 1 01 l Gi2 17 17 !@! 011 t o 31810 l@l 01 i l i l 718 0l@

d 60 91 00CX ET NU',it1ER od u>

EVENT OATE 14 75 REPORT DATE 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 1

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

) : a 0 to insure valve I

l these valves are 14-4ted to a nazirm opend.ng of 37

~> >2 closure within the na cirm allowable five seconds. This cccurrence is l

o 16 I

I retcMable under Technical Stecificatien 6.9.2a(6).

I 0

/

2i, i i I

d 9 30 SYSTE M

CAUSE

CALSE COMP.

VALVE CCOE CCOE SUSCOOE CCMPONEN T COL.

SuBCCOE SUSCODE 2191 I si n!@ IDi@ lZ l@

v1 Al Ll 7131 X @ 131@ I D i @

d 9

10 11 12 13 IW 19 20 cEQUEN TI AL OCCunHENCl REPORT HEviSION gga EVENT (E AA REPCRT NO.

CCOE TYPE NO.

O ag,po I 81 01 1-1 1 01 01 il I/I 1011I ITI l-1 0l r

s 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@

l0l010l0l l Y l@

lN l@

lAl@

lFl113l$l@

JJ 34 M

^/

. 40 4:

42 43 de 47 J

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

1 I

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

i j

discovered, the valves were reset to lees than 37 and cautionary tags t

have been placed on all drywell vent isolatien valve pressure regula-I 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 N/A l

lAl@l Operator Observatien l

v;1rNr AL Tivi ry AMCUNT OF ACTsVif Y @ I LOCATION OP RREASE @

hhE AS E D OF HU.e AM T IZl @ lZ!@

N/A I

N/A l

if

')

IQ 11 44 45 80 f'F ANONNF L F A PGsuRES NtJMH F H IYPE DESLHIP TION 39 y 101010,@lZl@l YA i

n osom.,'<,N,uns

,c.cHanON@

D 1 'F D

ljl0l010i@l N/A ffD wuuH l ^INbf Ol 0 l

l zA

-""a

,J9 v o uu wJU U U!iULL i,

2

.no t c<.5 oF oi. mw oe ro nciu ry n l 0 /_

L 3

YvPE O t. :,CHiv f lON iR iZl@!

N/A l

a if 10 60 G

8 00129 0 $ 73 v uvry NRC W ONLY E "i N l@OkSGRIP*lON U N/A

/%

l ll llll1Ili1!l}

s.3ygn l

/'

J. Cooney ]'

(215) 841-5020 g

GS 69 90 &

  • s tu

/

NAME OF PREPARER PHONE:

o