ML19309F395

LER 80-009/03L-0:on 800322,while Performing Pci Simulated Automatic Closure Initiation Test,Procedure Qos 1600-13, Transient in-core Probe 2,failed to Respond to Group 2 Isolation Signal.Caused by Dirty Contacts on Relay K21

ML19309F395
Person / Time
Site:	Quad Cities
Issue date:	04/21/1980
From:	Reed M COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19309F379	List: ML19309F378 ML19309F395
References
LER-80-009-03L-03, LER-80-9-3L-3, NUDOCS 8004290407
Download: ML19309F395 (1)

Text

v U. S. NUCLE AR REGULATORY COMMis$loN NRC FORM 366

• LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI 80042ga gd7 1 6 ITTil8 l 9l l L LICENSEE 7

I Q l ^CODE 10 l 2 lgl50 l0 l0 l- p 14 1 p l0 l - l 0 l 0 l 0 l@[ 4 l 1 l1 lll1l@l$7 SAT siCENsE NUMSER 23 26 LICENSE TYPE Jo l

58 lg CON'T l0lil 7 8

$l Ll@l015 60 61 l0 l 01 al 2l 6 l 5 l@l COCK ET NUVSER 68 067l 31212 EVENT OATE l 8 l0 l@l014 REPORT 74 75 l 2l1QATE 18 I Ol@ 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10 l 2 l l While performing the PCI Simulated Automatic Closure initiation Test. procedure l gl QOS 1600-13, TIP machine nurber 2 failed to automatically withdraw the TIP when a l 10 l . l l Group 11 Isolation signal was initiated. Consequently, the PCI ball valve did not l lTJT] l close (TS 3.7.D.2). The conseqences of this occurrence were minimal since the TIP [

I O ls i l machine could have been manually switched into reverse. The TIP would have then l

[0 l 7 l l withdrawn and the ball valve would have automatically closed. The TIP tube shear l

,o,gi i valve was also available. l

'lE'E "^TE CO suBCi'E CoveONENT COof su8CIo'E sVS$E 10191 7 8 15 lD l@ l El@ l A lh lR lE lL lA l Yl Xlh l A lh lZ lh 9 to 11 12 13 18 13 23

. SEQUENTIAL OCCURRENCE REPORT REVislON L EVENT YE AR REPORT NO. COOE TYPE N O.

@,a=ER;RO1810l l-l l 01019 l l/l l 013 l lL l [_j l0l ,

_,21 22 23 24 26 27 29 23 30 31 32 KN A TO O P T ET O HOURS s8 IT FOR1 8. sLPPL MANU ACTURER lJJAl@l34Z l@ WQ 34 lZl@

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44 47 CAusE DESCRIPTION AND CORRECTIVE ACTIONS h l3 lO; ] The cause of this failure was dirty contacts on TIP machine relay K21. This relav is l li li l l held normally energized by the 120 VAC Group 11 PCI bus. When an isolation siOnal I gl occurs, the relay de-energizes closing a set of contacts which will withdraw the TIP l g , ,3 g l from core. Relay K21 was replaced and the PCI simulated automatic closure initiation l g ; test was successfully completed. l 7 8 9 80 sTA 5  % POWER OTHER sTATVs is O RY OlsCOVEnV DESCRIPTION NA I1 15 l l H lh 'l 0l 0 l 0 lhl" "

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l AlnviTY CO0 TENT RELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE i l NA I I NA I FiTe l,ERsOwdE,,0s LL]' @ l Z oEscR,,T,0N Nue8ER n,E l@ets@ "

I t 17 l 10 l 010 l@l Z lhl NA l

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NuveER DEsCRinON@

Ml0 7 8 9 l 0 l 0 l@l NA11 12 80 l

'O's ' Ms'C"'?T ON "" @ 4 y lZlhl NA 80 l l 7 8 9 10 ts 12 l O l l E @l l NA DESCRIPTION l lllllllll1ll l ;,

7 3 3 10 68 69 90 5 !

NAVE OF PREPARER

. ed PHONE: 309-654-22h1 En 1% I, !

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