05000318/LER-1978-030-03, /03L-0 on 780828:discovered Control Element Assembly Motion Inhibit Not Operable for Position Deviation. Caused by Bad K2 Relay on Relay Card.Relay Replaced & Motion Inhibit Returned to Svc

/03L-0 on 780828:discovered Control Element Assembly Motion Inhibit Not Operable for Position Deviation. Caused by Bad K2 Relay on Relay Card.Relay Replaced & Motion Inhibit Returned to Svc

ML19269D569
Person / Time
Site:	Calvert Cliffs
Issue date:	09/26/1978
From:	Carroll J, Miernicki M BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19269D568	List: 05000318/LER-1978-030, Forwards LER 78-030/03L-0 05000318/LER-1978-030-03, /03L-0 on 780828:discovered Control Element Assembly Motion Inhibit Not Operable for Position Deviation. Caused by Bad K2 Relay on Relay Card.Relay Replaced & Motion Inhibit Returned to Svc
References
LER-78-030-03L, LER-78-30-3L, NUDOCS 7906040357
Download: ML19269D569 (1)

LER-1978-030, /03L-0 on 780828:discovered Control Element Assembly Motion Inhibit Not Operable for Position Deviation. Caused by Bad K2 Relay on Relay Card.Relay Replaced & Motion Inhibit Returned to Svc

Event date:
Report date:
3181978030R03 - NRC Website

text

NRC FORM 346 U.S. NUCLEAR REGULATORY COMMISSloN (7 77)-

,n C,

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

I M I o l c l e I s l 21@l n i n l _ l o lo l o l o l o l In i n l@lk 11 11 li ll l@l I

l@

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7 8 9 UCENSEE CODE 14 15 UCENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58 CON'T 0"J I L ]@l a l 5 l o l o l o 131118 l@l o 18 2181718 l@lo lo 1216 I7 lA l@

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7 8

60 81 OOCKET NUMB ER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PRC8ABLE CONSEQUENCES h o

2 l During performance of CEA partial movement te=t4n 4+ v==

A4ernw.w.d +ba l

7 l CEA motion inhibit (CMI) was not oper=ble h a 7n=4+4m, d ov4a + < ~-

o 2

o 4

IAll group 5 CEA's were immediately verified to be less than 5% inserted I

I as required by T.S. 3.1.3.1.

CMI was returned to service and I

o s

satisfSCtorily tested on 8/28/78 fo11oving CompletiCn of corrective l

o 6

l action. LER 77-100 (U-1) describes a similar event.

I O

7 l

o a

80 7

8 9 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CCQE SUSCODE COMPONENT CODE SUSCOCE SUSCODE la la l@ U@ l cl@ I r I n i s I r l w I trJ@ W@ tz_J @

o 2

7 8

9 to 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPO97 REvlSION LER/RO EV ENT YE AR REPORT NO.

CODE TYPE NO.

@ 4E g 7181 1-1 Iol31of l/l lo I, I [L_J I-1 Lo.J 21 22 23 24 26 27 28 29 30 31 32 K N AC ON ONP T

ME HOURS S8 i FOR 8.

SUPPLIE MANUFA. RER LA l@l Z I@

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b l@

10101 d o f IN @

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3J 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 o II'he CEA motion inhibit failu*. van ane +n a kaa v9. 1a7 en the *.lav ***d I

y y for the 8 inch group deviation cortion of CMI.

Th. r.lav vR,

• .7

• r d

I 1

i 2 land CMI returned to service. No further corrective action is necessa-r l

g lsince this is the first failure of this tvee.

I i

4 1

I 7

8 9 80

$A

% POWER OTHER STATUS dis O Y

DISCOVERY CESCRIPTICN e1 Lgj @ lo I9 l6 l@ l NA l

[3_j@lSurveillanc.Tn+

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A!TiviTY CO'ETENT

'5 RELEASED OF RELEASE AMOUNT OF ACTivlTY LOCATION OF RELEASE Iz I @ Lz J@l NA I

Na l

i 6

7 8 9 to 11 44 45 80 PERSONNEL EXPCSURES NUMBER YYPE

DESCRIPTION

IoloIoI@ d @l Na I

i 7

ERSONNEL i~2uLS oESCRi, tic ~8 2259 a,06 NuM8ER I ol o ol@l NA I

i a

7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACluTY @

7906040 967 J'

I TvPE oEScaiPTiC~

L l@l NA i

9 7

8 9 to 80 PU8uCITY NRC USE CNLY ISSUED @ DESCRIPTION W

l NA l

lll1IIIIIIIII~4 2

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8 9 10 68 69 83 3 J.T. Carroll /M.J. Mier.icki 2

~7 oHCNE:

NAME OF PREPARER