05000265/LER-1979-024-03, /03L-0:on 791025,vacuum Breaker AO 2-1601-20B Failed to Open During Calibr & Functional Test.Caused by Component Failure.Solenoid Valve 2-1601-50B Rebuilt 791025

/03L-0:on 791025,vacuum Breaker AO 2-1601-20B Failed to Open During Calibr & Functional Test.Caused by Component Failure.Solenoid Valve 2-1601-50B Rebuilt 791025

ML19253C328
Person / Time
Site:	Quad Cities
Issue date:	11/14/1979
From:	Wykoff D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19253C323	List: 05000265/LER-1979-024, Forwards LER 79-024/03L-0 05000265/LER-1979-024-03, /03L-0:on 791025,vacuum Breaker AO 2-1601-20B Failed to Open During Calibr & Functional Test.Caused by Component Failure.Solenoid Valve 2-1601-50B Rebuilt 791025
References
LER-79-024-03L-03, LER-79-24-3L-3, NUDOCS 7911300525
Download: ML19253C328 (1)

LER-1979-024, /03L-0:on 791025,vacuum Breaker AO 2-1601-20B Failed to Open During Calibr & Functional Test.Caused by Component Failure.Solenoid Valve 2-1601-50B Rebuilt 791025

Event date:
Report date:
2651979024R03 - NRC Website

text

(JO 5 0;1*.: 2R U. S. NUCLE AR R E Gi.L ATOR ( CO*..11S M Oew (7d t

LICENSEE EVENT REPORT CONTROL SwcK: l l

l l

l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFOR %1ATIONI t

6

@l 4 l 1 l 1 l 1 l 1 l@f l

l@

0 l0 0

ll lLlQlA lD l2 l@l 0 l 0 l 0 l - l 0 12 l 0 l-o 1

7 3 9 LICE.NSEE ccOE 14

'S LICENSE %VSEH 25 26 LICENSE TY PE JJ il CA T vo CON'T l@l 0 l 5 l 0 l 0 l 0 l 2 l 6 l 5 l@l 1 l0 l2 l5l7l9l@l1 1 l 1l 4l 7 l 9 l@

011 3$"C L

7 7

8 60 61 DOCK ET NUMB ER 68 69 EVENT O ATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h s

o 2 l While performing procedure QlS 48-1, Pressure Suppression Chamber and Reactor

[

o 3

l Cuilding Vacuum Breaker Actuation Calibration and Functional Test, vacuum breaker l

o 4

l A0 2-1601-20B failed to open (TS 3 7.A.3.a).

Primary containment integrity was o

s I maintained as valve A0 2-1601-20B failed closed, and the vacuum breaker function of l

o e

l the system was maintained by the 100 percent flow path through redundant valve l

0 7

l A0 2-1601-20A.

Check valves 1601-31A f, B were operable.

i 0

8 l

l 7

8 9 80 SYSTE M

CAUSE

CAUSE COMP.

VA LV E CODE CODE SueCODE CCVPONENT CODE SUSCODE 3USCOCE g

l Sl Al@ l E l@ l B l@ l Vl Al L l V l E l X l@ l B @ lC l @

7 8

9 10 11 12 13 19 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION

.E m ao EVENT YE AR REPORT NO.

CODE TYPE NO.

- @ a'sl.gf 17l91 l-l 10 12 l 4 l/l l0l3l lL l l-

[0]

_ 21 22 23 24 26 27 28 2'J 30 31 32 A EN ACT C O PL NT

'ET HOURS SB IT FOR d B.

E' i PLI VAN FACTURER

- lBl@lZl@

lZl@

l Z l@

l 0l 0l 0l 0l W@

lYl@

Al@

V l 0 l 9 l 5 l@

33 44 J3 36 3s 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTlvE ACTIONS h i

o l The cause of this occurrence was component failure. THe solenoid valve, 2-1601-50B, I m

that controls the air supply to the pneumatic operator of valve A0 2-1601-20B I

2 l

failed to operate. Excessive wear of the solenoid allowed the plunger to bind.

I gl The 2-1601-50B solenoid valve was rebuilt on October 25, 1979 and valve A0 2-1601-20B l i

4

[

was proven operable.

l 7

8 9 80 STA S

% POWER OTHER STATUS bl5 RY DISCOVERY DESCRIPTION l E l@ l 0l 4 l 9 l@l NA l

B l@l Routine Test l

i s

ACTIVITY CO TENT RELEASED OF RELE ASE AYOUNT OF ACTIVITY LOCATION OF RELE ASE i

6 lZ @ ]g NA l

NA l

7 8 9 10 11 44 45 30 PERSOP.NEL E xPOSUR($

N U P.*8 E R TYPE

DESCRIPTION

7 I l 0 l 0 l 0 l@l Z l@l NA l

1

' S

'o

,ERSONEL,muLS DESCni,r,0N @

Nurm R 1010101@l NA l

i 7

8 9 11 12 S3 LOSS OF CP Ot.'.' AGE TO FACILtTY Q j [,[ h, TvpE DE scola TION v

l O ")

NA l_LL_J l_Zjgl j y 4, l

7 4 3 1C 30 PUB L tCITY NRC USC CNLY g ']"g'SC"'"'

NA 7911300525 i i;ili;ii: ;iil}

I 8 9 to 63 64

.. 3 D. Wykoff 309-654-2241 ext. 180 NAvc oc e m o P e.s-