05000315/LER-1979-047-03, /03l-0:on 790908,circuit Breakers FMO-241,breaker- to-engineered Safety Feature Ventillation Fan 2 & breaker- to-A Train Heat Trace Circuits Found Open.Cause Not Identified.Breakers Reclosed & keep-free Areas Established

/03l-0:on 790908,circuit Breakers FMO-241,breaker- to-engineered Safety Feature Ventillation Fan 2 & breaker- to-A Train Heat Trace Circuits Found Open.Cause Not Identified.Breakers Reclosed & keep-free Areas Established

ML17326A279
Person / Time
Site:	Cook
Issue date:	10/09/1979
From:	Chadwell H INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17318A332	List: 05000315/LER-1979-047, Forwards LER 79-047/03L-0 05000315/LER-1979-047-03, /03l-0:on 790908,circuit Breakers FMO-241,breaker- to-engineered Safety Feature Ventillation Fan 2 & breaker- to-A Train Heat Trace Circuits Found Open.Cause Not Identified.Breakers Reclosed & keep-free Areas Established
References
LER-79-047-03L-01, LER-79-47-3L-1, NUDOCS 7910160473
Download: ML17326A279 (3)

LER-1979-047, /03l-0:on 790908,circuit Breakers FMO-241,breaker- to-engineered Safety Feature Ventillation Fan 2 & breaker- to-A Train Heat Trace Circuits Found Open.Cause Not Identified.Breakers Reclosed & keep-free Areas Established

Event date:
Report date:
3151979047R03 - NRC Website

text

NRC FORM 366 I7-77)

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~

'44 Cg

'4, 9

3 CONTROL BLOCK

~O 7

8 CON'T

~01 QB

~LQR 0

5 0

0 0

3 1

5 QT 0

9 0

8 7

9QR 1

0 0

60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 WHILE PERFORMING ROUTINE PLANT INSPECTIONS DURING NORMAL PLANT OPERATIONS, THREE 7

8 U. S. NUCLEAR REGULATORY COMMISSION ENSEE EVENT REPORT P1 tPLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

I 6

Q20 o

o o

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0 0

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o Q34

'QE~QE 9

LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58

~03 CIRCUIT BREAKERS TO SAFETY RELATED EQUIPMENT WERE FOUND TO BE OPEN.

EACH BREAKER

~04 WAS FOUND ON A SEPARATE OCCASION.

THE FIRST OPEN BREAKER WAS FOUNDiFOR FMO-241>>

~06 AUXILIARY FEEDWATER FROM THE TURBINE DRIVEN AUX.

FEED PUMP TO STEAM GENERATOR NO.

4

~06 ON 09/08/79, CONTRARY TO TECH.

SPEC. 3.7.1.2.

THIS BREAKER HAD BEEN VERIFIED

~07 CLOSED 4.6 HOURS EARLIER.

THE VALVE WAS IN ITS NORMAL STANDBY OPEN POSITION AND

~OB FLOW THROUGH IT COULD HAVE BEEN CONTROLLED BY PUMP SPEED.

(CONTINUED PAGE 2) 7 8

9 80 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE 0

Q11

~XQ12

~ZQ13 Z

Z Z

Z Z

Z QR

~ZQ13 Z

Q13 7

8 9

10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT R EV IS I ON LERIRO EVENT YEAR REPORT NO.

CODE TYPE NO.

Q17 REPoRT ~yg

~

~04 2

~>

~03 Ui 0

U 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDQ PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS &22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER LJQ13 ~ Q13 LJQ211 ~ Q21

~>>

Q23 ~Q

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33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o

ALL THREE CIRCUIT BREAKERS WERE RECLOSED WHEN FOUND OPEN AND THE AFFECTED EQUIPMENT 1

TEST OPERATED.

ALL LOW HEAT TRACE CIRCUITS RECOVERED TO-145QF WITHIN A 5 HOUR PERIOD.

REASON FOR BREAKERS BEING OPEN COULD NOT BE IDENTIFIED. A ".KEEP FREE" 'AREA 3

IS BEING LAID OUT ON THE FLOOR IN FRONT OF ALL MOTOR CONTROL CENTERS WITH SAFETY RELATED BREAKERS.

A DIRECTIVE HAS BEEN ISSUED TO ALL PLANT (CONTINUED PAGE 2)

CE3 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQS

~ ~Q ~(S NA 7

8 9

10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39

~>>

LoaooJO>>

z Q-7 8

9 11 12 13 PERSONNEL INJURIES NUM8 ER DESCRIPTION Q41 3

~OO O

Qo NA 45 NA 9

11 12 LOSS OF OR DAMAGETO FACILITYQ43 TYPE

DESCRIPTION

Z 042 NA 7

8 7

8 9

FACILITY

~30 METHOD OF STATUS 55 POWER OTHER STATUS ~

DISCOVERY 1

3

~EQ>> ~l0 0

Q>>

NA

~BQ31 8

9 10 12 13 44 45 46 DISCOVERY DESCRIPTION C~~)

OPERATOR OBSERVATION LOCATIONOF RELEASE Q NA 80 80 80 80 80 7

8 O

9 10 PUBLICITY ISSUED DESCRIPTION IPJ LNJO44 NA 7

8 9

10 NAME OF PREPARER H.

M. Chadwell PHONE NRC USF ONLY 80 2

68 69 80' 616 465-5901 X-316

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f /'4. )

ATTACHMENT TO LER 879-047/03L-0 PAGE 2

EVENT DESCRIPTION

AND PROBABLE CQNSE UENCES:

THE SECOND OPEN BREAKER WAS TO ESF VENTILATION FAN-1 ON 09/11/79.

THIS BREAKER HAD BEEN VERIFIED CLOSED 8 HOURS EARLIER., REDUNDANT,ESF VENTILATION FAN-2 WAS.

k, OPERABLE AND RUNNING THIS ENTIRE PERIOD.

THE THIRD OCCASION THE POWER BREAKER TO SOME OF THE "A" TRAIN HEAT TRACE CIRCUITS WAS FOUND OPEN ON 09/20/79.

THIS WAS IDENTIFIED DURING NORMAL DAILY HEAT TRACE SURVEILLANCE WHEN SOME OF THE CIRCUITS OF TECH.

SPEC. 3.1.2.2 WERE FOUND TO BE C145~F AND ONE CIRCUIT Of TECH.

SPEC. 3.5.4.2 WAS FOUND TO BE <145 F..

ALL CIRCUITS HAD BEEN VERIFIED TO BE <<145oF ON THE PREVIOUS 24 HOUR SURVEILLANCE.

THE LOWEST CIRCUIT OF TECH.

SPEC.

3.1.2.2 WAS '103 F.

DURING THIS TIME OF LOW TEMP.

THE ALTERNATE fLOW PATH FROM THE RWST WAS OPERABLE.

THE SINGLE CIRCUIT OF TECH.

SPEC. 3.5.4.2 WAS AT 130 F AND

'HIS WAS UNDER CONSTANT, RECIRCULATION FLOW.

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS:

DEPARTMENTS AND THE CONSTRUCTION MANAGER RE-EMPHASIZING THE NEED TO CONTROL ALL WORK ACTIVITIES IN THESE "FREE AREAS".