ML19254D826

LER 79-056/03L-0:on 791004,fuses for Normal & Reserve Power to Relief Valve Blew,Rendering Relief Valve Inoperable. Caused by Socket Shorting While Changing Closed Indication Light Bulb for 2-D Electromatic Relief Valve

ML19254D826
Person / Time
Site:	Dresden
Issue date:	10/23/1979
From:	Dunbar J COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17174A093	List: ML17174A091 ML19254D826
References
LER-79-056-03L, LER-79-56-3L, NUDOCS 7910300214
Download: ML19254D826 (1)

Text

{{#Wiki_filter:~ ~ [[7(*# LICENSEE EVENT RE? ORT CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) o Ii IILIDlRlSl 2 l@l 0IS 10 l- l 0 l0 l 0 l 0 l 0 l- l0 l 0 l@l4LICENSE l1l1l1l1l@l l lg i 3 3 LICENSEE CCOE 14 LICENSE %*/dE'4 25 A6 T v PE 40 57 L A T 5d CON'T . ol1i SObRC l L 61l@l 01510 l 0 l 0 l 2 l 317 (l1 l0EVENT l 0DATE l4 l 7 l 9 @l1 l 0PE*DRT l 213 ( 7 l930l@ I 4 60 COCKET NU?>9 E q 64 t>'J 14 75 DATE EVENT DESCRIPTION AND PROB ABLE CONSECUENCES h ~ oI: l While changing the closed indication light bulb for the 2-D electromatic relief  ; o,3j l valve, the socket shorted blowing the fuses for normal and reserve power to the 9 o,a l relief valve and rendering the relief valve inoperable. Safety significance g o,3 l minimized because HPCI was operable as were remaining relief valves during 9 o .s l repairs to the socket. This is the first event of this nature. , Ol; I l 0131 l l 7 9 9 80 SYSTE*1 CAUSE CAUSE COYP. VALVE COCE CODE SUSCODE COVPONENT CODE SUB000E SUSC00E a 9 IS I rlg l E g [ A lh l Il Nl Si Tl Rl Uh l T h d h 7 8 ') 10 11 12 13 18 13 20 _ SE QU E N TI A L OCCURRENCE REPORT R E VIslON LER AO EVENT YE AR REPORT NO. CCOE TYPE No. O,asg; u I2' 71 9J l-l 23 24 0 15 16 l l/l 101,1 ItI l-l L0J 22 26 27 28 29 30 31 32 TAKE A T CN O PLA T MET HOURS S 8 1T FOR1 B. SL PP LI E MAN F TURER lJ3A lglJ42l@ Zl@ lZ l@ l0 10 l0 l0 l lN l@ l42N l@ Nl@ lG l0 l8 l047l@ 35 36 37 40 41 43 44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h iiO l The closed indication light bulb socket shorted whi'e replacine the light bulb in- l i i t e rnallv. The socket was replaced and onerability of the 2D electromatic relief I

   ,        7      g valve demonstrated. No further corrective action deemed necessary.                                                                                                                  g i       a l                                                                                                                                                                                          l i      4       1 l

7 8 9 80 STA S  % POWER oTHERSTATUS Dis O RY DISCOVERY DESCRIPTION 1 5 l E l@ ' l0 l9 8l@lo 12 N/A 44 l lZ l@le 4S Operator Observation 80 l ACTIVITY CON TE NT OF RELE ASE AMOLNT OF ACTIVITY LOCATION OF RELE ASE 1 6 lZ l mELEA5E@D l 7 l@l N/A l N/A l 7 8 9 TO 11 44 45 80 PERSONNEL E XPOSLRES Nt98ER TYPE D E SCRIPTIO N > 10 l 010 l@l Z l@l N/A l PERSCNw'L,N;uLS , , Nuve E R cESCRiPTiONh , LLLd 101010181 N/A I F 8 9 11 12 80 LOSi OF C A C AV AGE To FACILITY TYPE DESCRe#TICN 791030 7 t 3 d 3 [2]h 10 N/A go

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NAME OF PREPARER John Dimbar PHONE: b b}}