05000335/LER-1979-036-03, /03L-0:on 791203,while Operating at Full Power, Control Room Operator Discovered Mb Linear Power Range Channel High Voltage Was Lower than Other Three Channels. Caused by Failed +15 Volt Power Supply.Supply Replaced

/03L-0:on 791203,while Operating at Full Power, Control Room Operator Discovered Mb Linear Power Range Channel High Voltage Was Lower than Other Three Channels. Caused by Failed +15 Volt Power Supply.Supply Replaced

ML17266A139
Person / Time
Site:	Saint Lucie
Issue date:	01/02/1980
From:	Schoppman M FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17207A787	List: 05000335/LER-1979-036, Forwards LER 79-036/03L-0 05000335/LER-1979-036-03, /03L-0:on 791203,while Operating at Full Power, Control Room Operator Discovered Mb Linear Power Range Channel High Voltage Was Lower than Other Three Channels. Caused by Failed +15 Volt Power Supply.Supply Replaced
References
LER-79-036-03L-01, LER-79-36-3L-1, NUDOCS 8002040535
Download: ML17266A139 (2)

LER-1979-036, /03L-0:on 791203,while Operating at Full Power, Control Room Operator Discovered Mb Linear Power Range Channel High Voltage Was Lower than Other Three Channels. Caused by Failed +15 Volt Power Supply.Supply Replaced

Event date:
Report date:
3351979036R03 - NRC Website

text

NRC FORM MS f7.77 I LICENSEE EVENl'fQOR7 U.*NUCLEARREGULATORYCOMMISSION

~O 1

3 CON T

~o t

3

'O IPLKASc PRIIIT OR TYP ALI.RKCUIRKD INFORMATIONI I

IQ I

I -

I I

I I

I I

I Q

I I

I I IQ~IQ 9

IJCKNSKE COOK I"

\\ IC Nsc p'IIFMSER

~ S I iCSNSE YPS 13 St CAT Q

":::i Ii.O I

Q~O~O

$0 Sl OOC)CPT NUAISER sa os ivaNT Q*TE I+

TS R'EPQRT O*FTS 30 EVENT OKSCRIPTION 'NO I'ROSAKLKCONScCUENCKS QIO

'4'hile o eratin at 100%

ower 1

o erator discovered that

~03 the "MB" linear over ran channel hi Qh voltR I

w.

41 = 50V lover than the

~o

~

othe channels.

The "MB" lin r ~~~4

- n was declared ino er-able and the "Hi Pover>>

IITM Lptt 'ILoss of Lo dtt It PPCF trips vere placed in b ass in accordance with Technical S

e f'.3.1.1.

The 15V power su 1

was re37laced and the "hlB" channel re r

within the time limit s ecified.

Thre~

7 3

9 o erable.

~og over su 1

Techni Power Model I,"PL 14.5-3.0 Ho cause could be deter-SYSTEM

CAUSE

CAUSE COMP VALVS CQOE CQOK SUSCQQE CCMPONK4T COOK sua"Qca suacocs S LCS LLS ~l, !,

Q mc LQ 1

S 9

IO l2 12 IS 2O 54OUENTIAL OCCURAK4CK REPORT REVI$IO4 ~

LSRIRQ 4VKNTYKAR REPORT NO, COCK TYPE "IO.

Qo FiPFFF 12 22 24 1S Tt

~$

M O

)

22 ACTION SUTURc EFPPC SIRUTQCPRIN A ~.ACIFMENT NPROM PRIME C Ms, CQMPC Nck T TPUCEN lcTIQIt ck PLANT NKTNQQ NQUAS +22'USMIT ~ 'SO FP PIMSUS.

SUPPLIER FPIANUFACTURAR LJSLQS LJS

. IRIS ~i Lic LRS I

IS CAUSE DESCRIPTION ANO CORRECF IVKACTIONS Q27 The "HB" linear over ran e hi h voltage failed low due to a failed +15V mined for this failure.

Immediate corrective action was to reolace the over su 1

No further corrective action is reouired.

i 9

FACILI Y Si*TUS OTIIER STATUS 0 NA Qci LJS ~i~

a IO I2 IS ac ACTIVITY CQNT44T RELKASEQ QP RELEASE AMOUNTOP ACTIFPITY QSS

~Z Q ~~QK.

NA I

3 9

IO 44 PERSONNEL fXPOSUIIES 4UAISER TYPE QESCRIPTION QN

~ii LoOooo

'iQ>>Lz le 1

9 3

Il I2 Is PcilsONNEL IktURFES [ii~J ~oo o

IQF METRO "4

OISCQVECY

~A.'~31.

4$

NA NA

'ISCCVERY QES WPTICAI S2 Operator Observation LOCATIONOS AELKASc Q38 SO 30 g

2 a

2 9

I I I'1 LCSS QII CR 0AM ACE. 0 FACILITYQas TYPE OESCRIPTIQN

~Z'A2 IO PUSLlc:..

ISSUEQ OESCRIPT:QN 9 IQaa 2

IO MAFIARP >RRPAR;R~

NA NA 80080iso 30 NRC USE ONI.Y I'l 'III I

I SS i $4 PI.ON s.

(

'7

,<<4