05000316/LER-1979-016-03, /03L-0 on 790412:failure of Interlock,Which Prevents Opening Both Containment 650 Ft Level Airlock Doors.Caused by Slack in Actuator Cables & Weak Spring.One Cable & Spring Replaced

/03L-0 on 790412:failure of Interlock,Which Prevents Opening Both Containment 650 Ft Level Airlock Doors.Caused by Slack in Actuator Cables & Weak Spring.One Cable & Spring Replaced

ML17317B191
Person / Time
Site:	Cook
Issue date:	05/09/1979
From:	Wizner D INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B189	List: 05000316/LER-1979-015-03, /03L-0 on 790409:during Plant Startup,Small Crack & Pinhole Leak Found in Body of FMO-232,at Inlet Side of Valve Adjacent to Weld.Cause of Crack Not Determined. Radiographs of Area Reviewed 05000316/LER-1979-016-03, /03L-0 on 790412:failure of Interlock,Which Prevents Opening Both Containment 650 Ft Level Airlock Doors.Caused by Slack in Actuator Cables & Weak Spring.One Cable & Spring Replaced ML17317B188
References
LER-79-016-03L-01, LER-79-16-3L-1, NUDOCS 7905150501
Download: ML17317B191 (2)

LER-1979-016, /03L-0 on 790412:failure of Interlock,Which Prevents Opening Both Containment 650 Ft Level Airlock Doors.Caused by Slack in Actuator Cables & Weak Spring.One Cable & Spring Replaced

Event date:
Report date:
3161979016R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSION 1

1 1

1 OR~ O 25 26 LICENSE TYPE 30 57 CAT 58 QB CONTAINMENT 650 'EVEL AIRLOCK DOORS FAILED.

THIS CONSTITUTED AN NRC FORM 366

{7.77)

~'

~

ICENSEE EVENT REPORT CONTROL BLOGK:

01

{PLEASE PRINT OR TYPE ALLREQUIRED INFORMATIONI I

6 M

I D

C C

2 Q2 0

0 0

0 0

0 0

7 8

9 LICENSEE CODE 14 15 LICENSE NUMBER CON'T KOI Eoos CHLOE 0

5 0

0 0

3 1

6 QT 0

4 1

2 7

9 Qs 8

60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES +10

~02 DURING SURVEILLANCE TESTp THE INTERLOCK WHICH PREVENTS OPENING BOTH 4

INOPERABLE AIRLOCK PER T.S. 3.6.1.3.

THE DOORS WERE SHUT AND GUARDED UNTIL REPAIRS WERE COMPLETE.

PUBLIC HEALTH AND SAFETY WAS NOT JEOPARD IZED ~

S IMILAR EVENTS 78 0 14/03L Op 78 066/03L Op ALSO 79 004/03L Oi DOCKET NO.

050-03 1 5

~OS 7

8 9

80 7

8 0

SYSTEM

CAUSE

CAUSE COMP VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~SA OII E

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E W

E T

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~AS LJ8 9

10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT.

REVISION LERIRP EVENTYEAR REPORT NO.

CODE TYPE NO.

QIT REPQRT ~79 Q

~01 6

U> M U

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

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER Qis /JOIE gJQEO

~OEI QEE

~Q24

~QEE W

3 0

2 QEE 33 34 35 36 37 i40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 027 MALFUNCTION OF THE INTERLOCK WAS DUE TO SLACK IN THE ACTUATOR CABLES AND A WEAK ACTUATING SPRING.

ONE CABLE AND THE SPRING WERE REPLACED.

THE INTERLOCK WAS SATISFACTORILY TESTED.

3 7

8 9

FACILITY STATUS 9I POWER OTHER STATUS E

2S 1

0 0

29 N/A 80 METHOD OF DISCOVERY DISCOVERY DESCRIPTION 32

~BQ31 SURVEILLANCE TEST 44 45 46 80 LOCATIONOF RELEASE 036 N/A 45 44 80 80 80 80 NRC USE ONLY 68 69 80 ~ Es PHPNF, (6 16) 465 590 z

35 L

DAVID G.

WIZNER NAME OF PREPARER CD 0 ~Q ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ EHl Z

033 L~I034 N/A

,7 8

9 10 11 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

~>>

L0O]O>>~>OEE 7

8 9

11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTION 041

~s

~OO O

Qo N/A 7

8 9

11 12 LOSS OF OR DAMAGETO FACILITY 43 TYPE

DESCRIPTION

Z 042 N/A 8

9 10 PUBLICITY ZZ ~N044 N/A 7

8 9

10

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