05000255/LER-1979-016-03, /03L-0 on 790406:diesel Generator Output Breaker Has Potential to Lockout Open.Caused by Failure of Contact on Shutdown Sequencer to Operate.Sequencer Repaired

/03L-0 on 790406:diesel Generator Output Breaker Has Potential to Lockout Open.Caused by Failure of Contact on Shutdown Sequencer to Operate.Sequencer Repaired

ML18043A642
Person / Time
Site:	Palisades
Issue date:	04/30/1979
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18043A641	List: 05000255/LER-1979-016, Forwards LER 79-016/03L-0 05000255/LER-1979-016-03, /03L-0 on 790406:diesel Generator Output Breaker Has Potential to Lockout Open.Caused by Failure of Contact on Shutdown Sequencer to Operate.Sequencer Repaired
References
LER-79-016-03L, LER-79-16-3L, NUDOCS 7905040407
Download: ML18043A642 (1)

LER-1979-016, /03L-0 on 790406:diesel Generator Output Breaker Has Potential to Lockout Open.Caused by Failure of Contact on Shutdown Sequencer to Operate.Sequencer Repaired

Event date:
Report date:
2551979016R03 - NRC Website

text

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PALISADES NRC FORM 366 (7-77)

U.S. NUCLEAR REGULATOR'/ COMMISSION

• LICENSEE EVENT REPORT CONTROL BLOCK:

._! -~_,___.

_.___.___,j 0 (Pl.EASE PRINT OR TYPE ALl. REQUIRED INFORMATION) 6 [ill IM I I I PIA I LI 1101 010 I 7

8 9

LICENSEE CODE 14 15

- I o Io I o I 01 o I -Io I o 10)14 I l J lJ 11 1101 I 10 LICENSE NUMBER 25 2S LICENSE TYPE 30 57 CAT 58 CON'T

.ITIIJ 7

8

~~:~~~ W©JO I 5 I 01 01o12 I 5 I 5 !(DI o I 41 O* J 6 J7 J 9 l@IO I 41 31 o I 71 9JG) 50 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@.

I The on-going investigation into the R bus trips which occurred during the

~

I fall of 1977 has revealed a potential for the 1-1 diesel generator output [EE]

breaker to "lockout open 11 This potential exists only when the 106D-l [Q))]

relay fails to reset following operation of the normal shutdown sequencer. 1 [IJIJ This has occurred 4 times.

On 3 of these occasions, the plant was in a shutdown condition; the fourth occtll"red with the plant on line and lasted

[]TI] 1.._f_o_r_2_h_o_ur_s_. __ E_*_'fe_n_t_h_a_d_n_o_a_d_v_e_r_s_e_e_f_f_e_c_t_o_n_p'-u_b_li_* _c_h_e_a_l_t_h_o_r_s_a_f_e_t""'"y_. __ __.I 7

8 9 80 [9J]J SYSTEM

CAUSE

CAUSE CODE CODE SUBCOOE COMPONENT CODE JEJEI@ ~@ ~@ JC!KJTIBJRJKIE)

COMP.

VALVE*

SUBCODE SUBCODE*

~@) ~@

7 8

9 10 11 12 13 18 19 zo SEQLIENTIAL OCCURRENCE REPORT REVISION REPORT N9' CODE TYPE l==1 I O I 11 o I L:::::J 10 I 3 I IL I l=J 23

74 15 2:t

~

g JO 31 NO.

L£J 3:'

TA'<EN ACTION ON PLANT METHOD HOURS SUBMITTED FOAM :>UB.

SUPPLIER ACTION FUTURE EFFECT SHUTDOWN

~ ATTACHMENT NPRD-4 PRIME COMP.

COMPONENT MANUFACTURER.

~@W@ ~@ ~ 10 101 01 I !!J@) 1.!J

~@

.33 34 35 36 37 40 41 42 43 I A I lJ 81 o I@

CAUSE DESCRIPTION AND CORREC'flVE ACTIONS @

44 47

~

.1 A contact (34-5) on the normal shutdown sequencer failed to operate.

[JJJ]

sequencer was repaired.

To prevent recurrence, annunciation of relays o::IIJ 1 l06Dl or l06D2 being en~rgized will be provided.

The [JJ]J L.__*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~---'

[]JI]

7 8

9 FACILITY fJo' STATUS

% POWER OTHER STATUS '.:!:::J GE [LJ@...__.l__.l~l@I See event 8

9 10 12 13 44 ACTIVITY CONTENT

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. c~:E:ftzAY@F lzE1... I _N.,/_A_AM_O_U_N_T_O_F -AC-T-IV-IT_Y_~_3_5 __.

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9 10 11 44 PERSONNEL EXPOSURES Q..

.METl-IOD OF DiSCOVERY UJ@J Review 45 40 I N/A 45 DISCOVERY DESCRIPTION LOCATION OF RELEAS.E@

80 80 80 ITI2J 10 r0r 01@ly~Vi@i°Nr;TION~,

a 9

11 12 1~3--'---------------------------------'so PERSONNEL INJURIES Q

NUMBER DESCR!TION~

~

JO I 0 1. OJ@..... ! _N~f..:._A ________________________

a s

, 1 12 LOSS O~ OR DAMO.GE TO FACILITY f4;)\\

[2EJ 1re1@i°ENJATION

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1 a 9

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50 ao PUBLICITY

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1ssueDCI DescJ;PTION ~

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10 68 69 80