ML19242A395

LER 79-016/03L-0 on 790531:RHR Pump 1A Tripped During Start on Overcurrent in Phase C.Caused by Failure of GE Model 121AC66K8A Overcurrent Relay Operating Disc to Return to Normal Position.Relay Cleaned,Recalibr & Retested

ML19242A395
Person / Time
Site:	Cooper
Issue date:	06/26/1979
From:	Bednar L NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19242A394	List: ML19242A393 ML19242A395
References
LER-79-016-03L, LER-79-16-3L, NUDOCS 7908010557
Download: ML19242A395 (2)

Text

kRe P*"4M 366 U. S. NUCLE AR REGULATORY COMMISSION

{7 77) ~

LICENSEE EVENT REPORT CONTROL BLOCK:

i l l l l l .f,h (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 7 0 1 8 9 N

ELICENSEE l C l CODE PlRl1 14 l@l 15 0 0NUVBER 0 l 0 l- l 0 l LICENSE l0 l- ln In ln lhla l1UCENSE 25 26 l1 l3TYPEl130lh!51 c Al T 58l@

CON'T 7

0 1 3

sO7RCE 60 L Q 0 l 5 l 0DOCKET 61 l 0 l0 l 2 l 9 18 NUMBEq 68

@l0 69 l5 13 l1 l 7 19 l@l0l6l2 EVENT DATE 74 75 I6 17 l940l@

REPORT DATE EVENT DESCRIP~lON AND PROBABLE CONSECUENCES h o 2 lWhile performing surveillance test S.P. 6.3.5.5 RHR Pumo lA trinced durine stare en I o 3 overcurrent in phase C. RTS 3.5. No significant occurrence took place. This event I o 4 lis not repetitive. It presented no adverse effects on public health and safety o s laedundant systems were available. I o 6 l 1 0 7 l 1 0 M l  !

7 4 3 50 SYSTEV CAUSE CAUSE COVP VALVE CODE CCOE SLBCCOE CCVPONENT CCDE SU9CCOE SUSCODE 7

O 9 8 9 C l F l h W h W h l n l t:' lT l3 l v l v lh lMh bh 10 11 12 13 W 19 20 3EQUE NTI AL OCCUR AENCE REPORT REVISION

,,,,.EV E*4T VE AR REPORT NO CCCE TYPE NO O g;g a .g90 17191 21 .2 l-23 1011161 24 26 1/

27 In l, I 23 29 W

3V I-I 31 W32 ACTION FUTUAE EFFECT SMUTOCWN ATT AC HM E NT NPR O-4 PRIVE COMP. COMPONENT TAKEN ACTICN ON PLANT YETHCO WQURS SUBYlTTED FORMduB SU PPU E R YANUFACTURER lE QlH l@

33 J4 lZ l@

35 lZ lh

.6 l0 hh 31 40 l h lh 4;

42 lh h lh h b b b lh 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 1

o lA General Electric Model 12 TAC 6 W M ove-~ *-on* 1,,- 0,n*,*4 3 14c- c s w . , - g.3, m 1 1 1 Ito its nor al cosition. A mil ,,-*4-1 0 of 4h*4c ,c 1, q , d k n t- a a n 9_  !;, -3i I

, ' leagnet. This caused reduction in time delav for the rela" ~~*,c* *n clomo_ %n -n 1, ,1 i a lwas cleaned, recalibrated and retested. Correct creration of on o-, !A c,2 1.n

• 4 c 4n a .1 1 a l l 3 3 80 F ACIUTY YETHOD CF STATUS + PCV E R CTHER STATUS DISCOV E RY DISCOV ERY CESCRIPTION 7

1 5 d )

E h l0 8 l1 lhl

12 11 NA 44 h Ihl 45 46 00erator Obsorva tion 80 l

A C TI V I T Y CCNTENT AELEASED OF RE LE ASE AVCUNT OF ACTIVITY LCC ATION OF RE LE ASE 1 6 l7 l l NA NA l 4 # :J tt 44 45 30 DE RSONNE L E 4PCSURES W YHFR " C E SC m PT! O N g 1

4 l0l0l0lhlb"Elhl 3 11 12 13 NA 30 l

DEH3ONNE L iNJLR'ES

%WER DESCRIPTICN s >

o l0 0l@l v n NA a0 l

mVZ GF OR DAYAGE TO F ACiU TV L r je a uC ~ T,0 um n 3 'O 79080mG 7 6 i so

_cE ES A PTtON a

- 7 INlbl 3 :O NA l ll ll l ll1 !l II l2 69 9 94 R0 1 N AVE OF PREP ARER Ladislav F. Bednar P ONE

~

$