ML17173A364

Forwards LER#78-057/03L-0

ML17173A364
Person / Time
Site:	Dresden
Issue date:	11/09/1978
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A365	List: ML17173A364 ML20027A331
References
78-1493, NUDOCS 7811160112
Download: ML17173A364 (2)

Text

e Commonwe'9 Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 rif~'n.n~_Ainr:;( 1r."*,~fi_, ~P'l~:- 1 I?ilef If" ~--~1 *~~

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Telephone 815/942-2920 1!Kll!JJWJ.1U h w. lid L

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November 9, 1978 BBS Ltr. #78-1493 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III U.S. Nucle~r Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 .. -:-- .... ~-

Reportable Occurrence Report #78-057/03L-0, Docket #050-237 is hereby submitted to your office in accordance with Dresden Nuclear Power Station Technical Specification 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.

Station I Dresden

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BBS/deb Enclosure. . ..,:*

cc: Di.rector of Inspection & Enforcement t-r Director of Management Information & Program Control File/NRC 78U160//2-

U. ;:>, NUCL.i::AH REGUL;*TOHY CCM,\~ISSl(JilJ COi'HR O L 6 LOCK: '----'---'----'--'-__."-_,!

• - -~ICENSEE 8 EVENT REPORT (PLEASE PRINT OR TYPE.ALL REQUIRED INFORMATION) 6 i0 I1 I I I I ~I DI RI s I 2JG)l 0  ! 0 I - I 0 I 0 I 0 I 0 I 0 l - I 0 I 0 101 4 I 1 I 1 I 1 I 1 101 I 10

.' S '.l LICE:\:SEE CODE 1.: ;5 , Ll.CH:SE.NUMoER 25-26*-klGENSE-T-YPE--'J0--5*7-GcA'f-58 . =------

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I During normal operation, the 2-1402-4B flow test valve failed to close fully against pump pressure while performing DOS 1400-1, core spray system pump operability. The core spray pump was secured and the valve closed fully. Safety significance was

[QJ}J minimal since the valve is normally closed duringcore spray operation. This event io I6 I occurred again on 10/23/78 and 10/24/78.

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' a 9 80 SYSTE~-~. CAUSE C.>.LiSE VALVE CODE CODE SU8CODE co:v:PONENT CODE SUBCODE

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nEPORT NO.

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NUMBER __ ... I I 7 i 8 I

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PRIME COMP.* COMPONENT SUPPL!!::R ~.tt.NUFACTURER

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44 47 Vlv. operator disassembled and no anomalie~: . I.**

CIIO' found. After reassembly vlv. was_ successfully cycled. Bkr. contactors*were cleaned Im and checked torque sw. settings were verified prior to cycling. Vlv. 1402-4B was I .*

QJI] , . scheduled for lubrication in Oct. but failed -before lube. performed. All frequently !I CITIJ I operated accessible ECCS vl VS. will be lubed .on a 6 mo. program. I 8 *9 -:. 80 _:

FJ>.CIL!TY STATUS  % POWER OTHER STATUS Qi_.

'7 METHOD OF

. DISCOVERY ..

y_ ,, ::',._ ~' *: .;; DISCOVERY DESCRIPTION

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'2.31 *:*: * *'., ._-,:-_ .

i i I 5 I ~@; I 0 I 9 ! 6 J(~j.__N_A_*_ _ _ _ _.___.I LAJ@I Surveillance testing "' '/*'* - *1*

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ACTIVITY CONTErJT . . -~ -.. .  :- . ' '" * * - * * (.;;;\ .

RELEJ>.SEO OF fiELEJl.SE Al,10.UNT OF ACTIVITY (2.V .* ** ,... . *. l:OC~TiON O~ 0 f'l ELEASE  : ., . ' .. * ""

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9 1G 11 44 45 60 PERSONNEL EXPOSURES Q, NUMBF.R r.;

;-,, T.YPE DESCRIPTION~

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11 12 13 80 PERSONNEL INJURIES (,;";\

NUMBER OESCRIPTION6

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!:! 9 11 ;2 NA 80 LO:;s OF OR DAf..1J>GE TO FACILITY (,.-... 11

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?. 9 10 - 80 PUBLICITY ISSUEDQ DESCRIPTION 45

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0 \'?\ NRC USE ONLY

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8 9 10 NA 6R 69 II II II !! I I I I~

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0 NAME OF PREPARER John Achterberg PHONE:-..... X-=2-><6..,,5_ _ _ _ _ _ _ __ a.

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