05000298/LER-1982-022-03, /03L-0:on 821025,RHR Time Delay Relay 10A-K45A Failed to Operate within Required Time Limits.Caused by Setpoint Being Set Too Conservatively.Relay Readjusted & Correct Operation Verified

/03L-0:on 821025,RHR Time Delay Relay 10A-K45A Failed to Operate within Required Time Limits.Caused by Setpoint Being Set Too Conservatively.Relay Readjusted & Correct Operation Verified

ML20028B467
Person / Time
Site:	Cooper
Issue date:	11/22/1982
From:	Bednar L NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20028B462	List: 05000298/LER-1982-022, Forwards LER 82-022/03L-0.Detailed Event Analysis Submitted 05000298/LER-1982-022-03, /03L-0:on 821025,RHR Time Delay Relay 10A-K45A Failed to Operate within Required Time Limits.Caused by Setpoint Being Set Too Conservatively.Relay Readjusted & Correct Operation Verified
References
LER-82-022-03L, LER-82-22-3L, NUDOCS 8211300408
Download: ML20028B467 (1)

LER-1982-022, /03L-0:on 821025,RHR Time Delay Relay 10A-K45A Failed to Operate within Required Time Limits.Caused by Setpoint Being Set Too Conservatively.Relay Readjusted & Correct Operation Verified

Event date:
Report date:
2981982022R03 - NRC Website

text

.

• AHC F OEM 366 U S. NUCLE AR REGUL ATORY COW.ilSSION am LICENSEE EVENT REPORT CoNTRot stOcx. l l

l l

1 l@

(PL E ASE PRINT oR TYPE ALL REQUIRED INFORMATION) le l t l l N I E l C l P l Rl 1l@l 010 l -l O l 0101 O l 01 -l 0l 0 l@l 4 l 1l 11 il ll@l I

l@

7 6 3 LICENSEE CODE 14 15 LectNSE NuveEM 2$

2b LACE r.5E iveE Jo SF LA1 ha CO*r T lolil 5C"CE I Ll@l 015101010121918 l@l il 012 l Sl 8l 2 l@l 1 l ; I ?l ?l A l ?I@

t 8

60 61 DOCK E T NUve E R fdl fe9 EVENT DATE 74 75 REFORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I o l 21 l During surveillance testing, RHR time delav relay designated 10A-K45A failed to oner-l 10131 I ate within the required time limits. The redundant system was operable.

This occur-l 1014 I l rence presented no adverse potential consecuences from the standnoint nf nublic I

loI5l l health and safety. Monthly tests performed on this relav durine last two vnnra re-I l o 16 I l vealed no abnormal drif t of the time del nv rni nv.

1 [o l 71 l l

l o lR I I I

S YST E M

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COUPONENT CODE SUSCODE SUBCODE I il nl@ btJ@ LzJ @ l a I n 11 li Iv I v 18 Lal@ Lzj @

o 9 y

3 9

to 1I 12 13 18 19 20

'E QUE N TI AL OCCUR R E NCE REPORT R E VISION M

EVENT YE AR REPORT NO.

CODE TYPE NO.

@,a=R. R O 1 sl 21 1-1 I n 1212 i Ld I nl,1 bJ L-]

Loj

_ 21 22 23 24 26 27 28 3

30 31 32 TAKEN AC ON ON PL NT ETH D HOURS SB tT D FOR S 9 SUPPLI MAN FAC URER LnJ@Lzl@

LzJ@

LzJ@

l ni ni ni ni Luj@

Ld@

Ld@

I. c I n I a I n l@

3J J4 35 3b 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS I1 Ioll Time delay relay, GE CR120K, failed to operate in the required time limits of 4.25 toI l: [ij l5.75 minutes. The delay of the relay was 5.84 minutes. The relay was rendjumend nnd I

lil2l l correct operation verified.

I l i l 31 l 1

I i 14 I I l

7 8 9 80 STA 5

• POW E R OTHER ST ATUS Ot5 0 Rv DISCOVE Rv OESCRIPTION l i l's 1 [fj@ l il o la l@l NA l

[Hjhl Surveillance Testine I

" A2TaviTv COOtENT AMOu~ToFACm Tv @ i LOCATION OF REu ASE @

REu ASEo OsaEuASE L2J @ L2181 I

I

> c mi vi P

R 9 10 tt 44 45 80 PERSONNE L E NPOSURES NUMB E R TYPE DE SCRIP TION li l il I o f o l' n l@L2J@l I

us

,E RsONN E L,N,U,',ES oESCRiPTiONh NuePe R I nl nl nl@l vi I

' r 8

i os,s o, n.. os..cE T0 r AC.i n v h 8211300408 821122 PDR ADOCK 05000298

>< e on,ournoN PDR l

, ' '>,.L, Zj@l l

NA S

t

,o

.o

""'".".o..noN@

... n,/,"81

" " C 5 0 "" '

• i ni l'lai Ls vi i

IIIIII111III12 m

'J tu 68 69 E0 5 l

402-825-3811 E,

NAYE OF PREPAREp Indislav F.

Rodnnr PHONE l