ML19319D816

RO-77-12:on 771001,borated Water Storage Tank Isolation Valve Failed to Open.Severe Wear Discovered in Motor Operator Clutch Assembly,But Exact Cause Not Determined. Vendor Being Contacted to Determine Failure Cause

ML19319D816
Person / Time
Site:	Rancho Seco
Issue date:	10/31/1977
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML19319D789	List: 05000312/LER-1977-012, Forwards LER 77-012/03X-1 05000312/LER-1977-012-03, /03X-1:on 771001,borated Water Storage Tank Isolation Valve Motor Operator Failed.Caused by Manual Operation.Damaged Parts Replaced & Operator Returned to Svc. Automatic Cycling Restrictions Imposed.Updates RO-77-12 ML19319D809 ML19319D816
References
NUDOCS 8003250808
Download: ML19319D816 (1)

Text

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O'

'UCENSEE EVENT REPORT v

CONTROL BLOCK:l l

l l

l l

l (PLEASE PRINT ALL REQUIRED INFORMATION) r s

i 8

YME WY WPE UCENSE NUMBER O1 l ClA lR lS lS l1l l 0 l 0l-l0 l0 l 0 l 0 l 0 l-l0 l0 l l4 l1 l 1l 1l 1l l0l1l 7 89 14 15 25 28 30 31 32 CATEGORY TYP RC DOCKET NUMBER EVENT CATE REPCRT DATE O 1 CONT l M l Il lLl l 0 l 5 l 01-l 01 3l1 l 2 l l 1l 0l 0l 1l 7l7 l l 1 l 0 l 2 l6 l7 l7 l 7 8 57 - 58 59 60 61 68 69 74 75 80 EVENT DESCRPTION gg lWhile attempting to fill the. "A" Steam Generator on October 1,1977, the BWST isolation l 80 35 7 89 The motor] ::

O l valve SFV-20003 failed to'open.

The redundant isolation valve was operable.

7 89 80 g l operator will be repaired and the vendor is being contacted to determine the cause of l 7 89 80 ~. !

HE lthe failure.

(R0 77-12) l

_l 7 89 80 HG l I

7 89 80 m

Es COCE COMPONENT CODE SUPPLER ACTUFUt VOLATION O

lC l F l y l Vl AlL l V] 0 l P]

l Al l 2l 2 l0 l 0 l lNl

_l 7 89 10 11 12 17 43 44 47 48 g

CAUSE DESCRIPT1CN

' 'i O

l Severe wear was discovered in the motor operator clutch assembly, although an exr.ct l

7 89 80 O9 l failure nachanism has not been identified. The operator is a Limitorque Model SMB-2' l

f(SerialNumber 133814).

j 8

O FAC:UTY METHOD OF STATUS

% POWER CTHER STATUS DISCCVERY OtSCOVERY CESCRIPTON W

l0 l 0l 0l l NA l W l

NA l

11 7 8 9

10 12 13 44 45 48 80 ACT1viTY CCNTENT CF AELEASE l AELEASEQ AMOUNT CF 6 (00ArrCN CF PELEASE W

NA l

l NA l

1 12 W

7 8 9

10 11 44 45 80,

PERSONNEL EXPOSURES NUMBEA TYPE CESCRpTICN

[1gj l 0 l 0 l 0l.. [2]

l NA:

l 7 89 11 12 13 80 PEASONNEL INJURIES NUMBER CESCAt#T:CN H l0l0l0l l NA l.

7 89 11 12

- 80 OFFSITE CONSEQUENCES 1

l Minimal to none.

l P

7 89 80 LOSS OA DAMAGE TO FAC:UTY Tv PE DESCRIPTON Wl NA l

~

1 7 89 10 80 AUSUCITY gl Local newspapers and wire services notiffed October 12, 1977.

l 7 89 8C ACOmONAL FACTORS 8 0 0 3 250 PC p *l L19J I 7 89 U

R.W. Colombo /F.T. Eisenhuth (916) 381-20 "

NAME:

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