05000416/LER-1982-163-03, /03L-0:on 821211,during Routine Power Supply Switching Operation,Both Shutdown Cooling Loops Isolated. Caused by Momentary Loss of Power to Rps.Shutdown Cooling Restored

/03L-0:on 821211,during Routine Power Supply Switching Operation,Both Shutdown Cooling Loops Isolated. Caused by Momentary Loss of Power to Rps.Shutdown Cooling Restored

ML20028D326
Person / Time
Site:	Grand Gulf
Issue date:	01/07/1983
From:	Freeman M MISSISSIPPI POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20028D325	List: 05000416/LER-1982-163, Forwards LER 82-163/03L-0 05000416/LER-1982-163-03, /03L-0:on 821211,during Routine Power Supply Switching Operation,Both Shutdown Cooling Loops Isolated. Caused by Momentary Loss of Power to Rps.Shutdown Cooling Restored
References
LER-82-163-03L, LER-82-163-3L, NUDOCS 8301170422
Download: ML20028D326 (1)

LER-1982-163, /03L-0:on 821211,during Routine Power Supply Switching Operation,Both Shutdown Cooling Loops Isolated. Caused by Momentary Loss of Power to Rps.Shutdown Cooling Restored

Event date:
Report date:
4161982163R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION At ent A

OH

.eo.

LICENSEE EVENT REPORT Page 1 of 1 o

CONYROL BLOCCC: l l

l l

l l

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

l M l S l C l G l S l 1 l@l 0 l 0 l-l 0 l 0 l 0 l 0 l 0 l-l 0 l 0 l@l4 l1 l 1 l1 l 1 l@l l

l@

o 1 7

8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 bi CAT 58 CON'T 3$n"C l b lhl 0 l 5 l 0 l 0 l 0 l 4 l 1 l 6 @[ 1 l 2 l 1 l1 l 8 l 2 l@l0 l 1 l 0 l 7 l 8 l 3 l@

O 1 7

8 60 61 OOCKET NUMBER 68 69 EVENT OATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lOl2l l On December 11, 1982, during a routine power supply switchinc operation. both shutdownl [o l3 l l cooling loops isolated.

A LCO was entered in accordance with T.S.3.4.9.2. however.

l l o l 4 l l shutdown cooling loop A vas returned to operation af ter 5 minutes. This event had noj [olst leffect on the health and safety of the public and did not constitute a threat to planti IOl6ll safety. The event is being reported pursuant to T.S.6.9.1.13.b.

l l G l 71 l l

101H 1 1 I

80 7

8 9 C DE ODE SUBCO E COVPONENT CODE SUB O'E SU E

lO191 lC lF l@ {@ lZ l@ l Z l Zl Z l Z l Z l Z l@ y@ y @

7 8

9 10 11 12 13 18 19 20 SE QUE NTI AL OCCURRENCE REPORT REViblON

,,,,ENENT YEAR REPORT NO.

CODE TYPE N O.

h "LE R ROl8 l2 l

[---j l 1l 6l 3l

(/_j l0l3l lL l

(--j l 0l j[,gRT

_ 21 22 23 24 26 27 28 h

30 31 32 T KET ACTO ON PL ANT MET HO'J R S SB ITT

.FOR B.

SU PLI MAN FAC URER [X jg]34Z l@

lZ l@

lZ l@

l0 l 0l 0l 0l W@

W@

lZl@

lZl9l9l9l@

33_

35 36 3/

40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 I i l o l lThe relays which control the isolation valves for shutdown cooline receive their I

I Iilii lpower from the reactor protection system.

When the nower sunn11es for thin cy e nn lwere switched the isolation relays momentarilv lost power and caused a shutdown l

1 7

l i l 3 l l cooling isolation.. Immediately after the switch, shutdown cooline was restored to l

I Ii14I loperation.

This is a finn 1 renorr.

80 7

8 9 SYA 5

% POWE R OTHER STATUS DISCO RY DISCOVERY DESCRIPTION NA l

U @l Planned Action l

l1 Is I LcJh L91 oI o181 ACTIVITY CONTENT RE LE ASED OF RE LE ASE AMOUNT OF ACTIVITY LOCATION OF RELE ASE NA l

l NA l

dj b h $hl 7

8 9 10 11 44 45 80 PEdSONNEL E xPOSURES NUMBER TYPE

DESCRIPTION

NA l

[0 l 0 l 0 l@W@l 1 7

.E RSONNil'inun S DESCRieTioNh

.uvee n [0 l 0 l0 j@l NA l

i s

7 8 9 11 12 80 Loss OF OR DAMAGE TO FACILITY TYFE DE SCRIP TION [Zj@l NA l

i 9 8"

B301170422 830107 issue [8lEsCniPiiON@

NRC USE ONLY PDR ADOCK 05000416 D

[ N_

l lllllllllllllj S

PDR 2 o 7

8 9 10 68 69 80 5 NANIE OF PREPARE,priginal signed by M. Scott Freeman PHON E :