ML17252B552

LER 80-017/03L-0 for Dresden, Unit 2 Re Double Valve Indication Was Observed on the HPCI Inboard Isolation Valve. Upon Trying to Cycle the Valve, the Valve Failed to Close

ML17252B552
Person / Time
Site:	Dresden
Issue date:	06/05/1980
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR 80-476 LER 80-017/03L-0
Download: ML17252B552 (2)

Text

e Commonwec9 Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 BBS Ltr. /180-476 June 5, 1980 James G. Keppler, Regional Director Directorate of Regulatory Operations

-Region. III U.S. Nuclear Regulatory Commission*

799 Roosevelt Road Glen Ellyn, IL 60137 *** *Reportable Occurrence Report /180-17/031-0, Docket /1050-237, is being submitted to your office in accordance with Dresden Nuclear Power Station Technical Specific*ation 6.6.B.2.(b), conditions leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limiting condition for operation.

BBS/nh Enclosure B. B.

Station Superintendent Dresden Nuclear Power Station cc/ Director of Inspection

& Enforcement Director of Management Information

& Program Control File/NRC LICENSEE EVENT REPORT I

• I 10 (PLEASE PRIN.T ORTYPAIL REQUIRED 1----.1....,_..1-__.....__._...._;;;._-'s\..!J

.# ., CONTROL BLOCK: I I I L I D I R I s I 2 101 0 I 0 I -I 0 I 0 I 0 I 0 I 0 I -I 0 I 0 IQ)I 4 11 I 1 11 I 1 1 G)I I I.@ 9 LICENSEE.

CODE . 14 15

• LlCENSE NUMBER 25 26. LICENSE TYPE. JO 57 CAT 58 . CON'T } o I 2 I j 0 13 I: l 0 1 4 I o I s 1 o I o I o I 2 13 11 101 o 1 s 1 1 1 2 I a 1 o I© 1 o I 6. 1 o I s I a I o 1 G) 60 61 DOCKET NUMBER 68 69 . EVENT DATE 74 75 REPORT DATE ao EVENT DESCRIPTION A":'D PROBABLE_CONSEQUENCES@

I *Following a uni"t scram, double* valve indication was observed on the HPCI-inboard isolation valve *. Upon trying to cycle. the valve, the valve failed to close (T.S.3.7.D.l).

The health and safety of the public was not endangered because the ) 0 I sJ I HPCI steam line was isolable _ via the outboard isolation valve and other ECCS systems -0 Is I* were operable.

'J'his -is the first occurrence of* this type. l a ,,7 r I 1Cr'Tal". 9 80 SYSTEM CAUSE CAUSE COMP. CODE COiJE SUBCOOE COMPONENT.CODE SUB CODE ISIFI@ L!J@ w@ lvlAILlvlolPI@

L!J@) 9 . 10 11 12 13 18 19 SEQUENTIAL OCCURRENCE AEPOP.T LEA/AO CV ENT YEAR. REPORT NO. CODE TYPE .REPORT I 8 I 0 I I l I 0 I l I 7 I I ........ , I 0 I 31 LEJ NUMBER .

• _ 21 22 23 24 . 26 27 28 29 JO VALVE SUBCOOE w@ 20 1=J 31 REVISION.

NO. ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPR0-4 TAKEN ACT.ION' ON PLANT METHOD . . HOURS' _SUBMITTED FORM :;us. PRIME COMP. SUPPLIER.

COMPONENT MANUFACTURER

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L:J@ L.:J@ I 0 I 0 I 0 I I L!:J@ l:J<§ 33 . 34 ' . 35 . 35* . J-7 40. 41 . . 42 I L I 2 I 0 I 0 I@ . 44 . . . . 47 -.CAUSE DESCRIPTION AND CORRECTIVE ACTIONS@ . 43 , , I 0 I r The failure was due to a packing leak on the valve' causing water to enter the valve ) 1 1 1 t .I _motor operator.

The mo.tor dr:!,ed out and the valve was and. cycled 1-) 1 I 2 I successfully.

N_o further action deemed necessary. ...............

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___.*I 45 46 80 LOCATION OF N/A 45. 80 ?ERSONNEL EXPOSURES

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' 8 9 11 12 13 so PERSONNEL INJURIES*

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