05000335/LER-1980-053-03, /03L-0:on 800826,during Full Power Operation,Power Supply to Core Protection Calculator 1 Failed.Caused by Bent Fuse Clip to Negative Supply Which Did Not Allow Sufficient Contact.Power Supply Repaired & Returned to Svc

/03L-0:on 800826,during Full Power Operation,Power Supply to Core Protection Calculator 1 Failed.Caused by Bent Fuse Clip to Negative Supply Which Did Not Allow Sufficient Contact.Power Supply Repaired & Returned to Svc

ML17266A277
Person / Time
Site:	Saint Lucie
Issue date:	09/25/1980
From:	Pace P FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17241A319	List: 05000335/LER-1980-053, Forwards LER 80-053/03L-0 05000335/LER-1980-053-03, /03L-0:on 800826,during Full Power Operation,Power Supply to Core Protection Calculator 1 Failed.Caused by Bent Fuse Clip to Negative Supply Which Did Not Allow Sufficient Contact.Power Supply Repaired & Returned to Svc
References
LER-80-053-03L, LER-80-53-3L, NUDOCS 8010100323
Download: ML17266A277 (1)

LER-1980-053, /03L-0:on 800826,during Full Power Operation,Power Supply to Core Protection Calculator 1 Failed.Caused by Bent Fuse Clip to Negative Supply Which Did Not Allow Sufficient Contact.Power Supply Repaired & Returned to Svc

Event date:
Report date:
3351980053R03 - NRC Website

text

NAG POAM SCC n TTI U. S NUCLCAR RCGULATORYCOrtIMISSION

~O 7

CON'T

~o 7

LICENSEE EVENT REPORT IQI IPLKASC PAINTOR TYPE ALLACQUIACO ICIPOAMATIONI d

I FILIS t

IQ2 LICILVSSS COCK t

l I

I 24 111 1

6 t

0 0

LNCSNSCYPS 30 Si ~5 541 LIC~SSS NVUMSCRI i isi Q.

ACPQAT ~IQS 60

~

61 QQCACT NVMSCA

&I 39 PVSNT OSSCRIPTION *NO PROBASLP. CONScOUBNCLIS QIO Ourin full ower o eration the ower su CVCt4T OATS ASPQAT OA ~ C I

to the 81 Core Protection Calculator failed.

This provided erroneous signals to HI-PWR, TMLP trips, local ower densit and thermal ower calculations.

Action was taken in accordance with table 3.3-1'f T.S. 3/4.3.1.

The power supply was replaced

~

and the RPS was, returned to normal.

The RPS was in 2 of '3 coincidence for four hours.

A similar occurrence was reported in LER 79-25.

~oa 1

3 9 30 SY5TS V CAV5C CAVSC COur.

vALvC CQOC coco SU3cooc CCMPONCNT CQOC SVSCOQS SUS QQS 5

5 OIIAOS L~JS MKS ~IN I I I 5 S MPS MtS 7,

5 9

10 I I 11 13 15 19 10 SCOUSNTIAI, OCCUAACIICC IICPQAT ACVISION SVCt4T YSAA

'1 l 11 11

~

16 17 15 19 10 il 31 ACTIOtl rurlIAC CPSCC

~

544UTQQvlu ATT*CI4MCNT APRON P.'IIMS CQMS.

COVPOuCNT TAtCCN ACTIQI4 C.'I PLAiIT MSTIIQQ NOVA5 22 SVSMIVTXQ PQAM>US.

SUPSLICA',

MANuSACTUACA LAJSLIJS LIJS LzJS Loaol A All LNJQ

~NS

~NIS

~oo I 5

13 JS 1$

16 St 40 4 I 43

~4 41 CAUS OSSCRIPTIO1I ANO COARPC4 IVKACTIONS Q27 The ower su 1

was su lied b

Lambda Model LCDA-22.

This is a dual 0-18V supply.

Failure occurred on one side, dropping voltage to 0.

The cause of the failure was a bent fuse cl,ip to the negative supply which did not allow for sufficient contact.

The failed power supply was repaired NA P.L.

Pace I*,

OA PRPPARcR and returned to stores.

3 9

P AC ILI Y

~2O MSTIIQQ OP ST

~ *TVS ri PQIVCR OTIICASTATUS PJ Q15CQVCAY QQ L~JS ~lo 5 S~NA

~Q 3

10 I'1 11 45 ACTIVITY CQtiTCNT ACLSA5CO QS ACLCASC AMOVNI'OPACTIVITY Q25 s

~Z Q22 ~ZQi NA 7

3 10 II 44 45 I'4AZQNNCL CI4>QZURSS NIUUSCA TYSS QSSCPI pTIQN Qrg

~00 ORQ>>I~IDN NA 7

5 3

I I I1 13 pSASQut4CL INJUAICJ 5 ~00 0:

I 3

9 I I 11 LOSS QS CA QAM>GC Q FACILITYQS2

,vse QC44 PIPTIQ44

~I) g ~Q2 NA r

3 7

10 PVIII.IC:TY IZSUCQ QCSCPIP

.CN GS LZ ISA NA I

1 7

OISCOVCAY OCZCRIPTIQtt Operator Observation 80 30 10 1'7 I'IRC USK Ol'NLY (305) 552-3801 LOCATIOtlOS ASL~C Q26 NA