ML18024B527

LER#78-093/03L-0 on 780914:Following Inadevertant SI,1CRCFC Failed to Low Speed Auto Start Due to Dirty Contacts in the Low Speed Hand Switch.Operating Surveillance Rev to Keep Dirty Contacts Clean

ML18024B527
Person / Time
Site:	Zion File:ZionSolutions icon.png
Issue date:	10/13/1978
From:	Rachel Johnson COMMONWEALTH EDISON CO.
To:
Shared Package
ML18024B526	List: ML18024B525 ML18024B527
References
LER-78-093-03L, LER-78-93-3L, NUDOCS 7811240223
Download: ML18024B527 (2)

Text

N RC I-OR M 3GG U. S. JUCLEAR REGULATORY COMMISSION 8

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LICENSEE EVENT REPORT P~ 4 CONTROL BLOCK: {PLEASE PRINT OR TYPE AI.L REQUIRED INFORMATION) 6 7 8 <<J L Z LICENSEE CODE I S1Q20 14 0 0 0 0 0 0 LICEIZSE NUMBER 0 0QE 25 26 4 1 1 1 LICENSE TYPE 10<<~Q 30 57 CAT 58 ON'T

~L080 5 0 0 0 2~95 QT0 9 1 4 7 8Qs 1 0 1 3 7~808 7 8 60 61 'OCKET NUMBER 68 G9 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROIIASLE CONSEQUENCES Q10 to low speed auto stapt. 1A RCFC was OOS and 1B RCFC accident inlet damper failed to shift. See LER 50-295/78-91. Tech Spec 3.5.1.C requir s a minimum of 3 RCFCs be operable, or the reactor shutdown. Since reacto was already shutdown, with 3 containment spray pumps avai lable, and 1C RCFC was manually started in low speed, sufficient pressure reducing 8 capacity was avai lab le . Hence, pub lic he a 1 th and safety was not a ffecte 7 8 9 80 SYSTEh1 CAUSE CAUSE COMP. VALVE

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CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE 7 8 9 10 Q11 [gJ 11 Q<<2 ~A 12 012 ~IN 8 13 T R 0 04 18

~8 19 018 LQ 20 Os SEQUFNTIAL . OCCUAAENCE BEPOAT REVISION Q11 LEBIBO REPoRT ACTION FUTURE EVENT YEAR

~7g 21 22 EFFECT

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23 SHUTDOLVN

~09 24 REPORT NO.

3 26

~W 27

~03 28 CODE ATTACHh1ENT 29 NPADP

~L 30 TYPE

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31 PRlhlE COMP.

~0 NO:

32 COMPONENT TAKEN ACTION ON PLANT METHOD HOURS '+22 -

SUBMITTED FOBhl SUB. SUPPLIER MANUFACTUAFB

+EQi8 +GQTR 33 34

+z028 35

+8021 3G 37 0 0

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0 0 40 QMQ23 41 gJQ24 42 pJQ 43 44 47

~QLF CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 8 Dirt contacts in low s eed hand switch revented EI auto start of 1C RCFC. 'These contacts are self wi in, thus the fan could be and was man uall started. 0 eratin surveillance has bee'n revised to exercise the 2 RCFCs low s eed hand switches at a one month interval thus keeping the self wi in contacts clean. No further action is required.

8 9 80 FACILITY METHOD OF STATUS  % PO'LVE A OTHER STATUS QSO DISCOVERY DISCOVERY DESCRIPTION

~Q28 ~00 0 Qs NA ~AQ31 Operator Observation

8. 9 10 12 44 45 46 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITYQ3G LOCATION OF RELEASE Q3G z 022 z Qs<< NA NA 7 8 9 '10 45 80 PERSONNEL EXPOSURES NUhIBEA TYPE DESCRIPTION Q3 1 ~OO Lo JQRT ~ZQss 7<<A 7 8 9 11 12 13 80 PERSONNEL INJUAIES NU!48EA DESCI'IIPTION 41

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LO'S OF OA o

11 0 12 0: hlAGF. TO FACILITY Q43 NA 80 TYPE OESCHIPTIO!4 Z 01..L NA 9 10 80 PUBI ICITY NRC'SI: ONLY 8

IS" UF[>

LNJQ4.1

<<J l)FSCAIPTIO 10 I N 68 69 80 s.

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NAMF QF I ncPAIIFII Robert Johnson PIIONE 312-746-2084 n 0

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