05000316/LER-1979-021-03, /03L-0 on 790622:starting Time Exceeded Tech Specs During Test on Hydrogen Skimmer Recirculation Fan.Design Change Installed 781118 After Repeated Occurences & 10 Tests Satisfactorily Performed

/03L-0 on 790622:starting Time Exceeded Tech Specs During Test on Hydrogen Skimmer Recirculation Fan.Design Change Installed 781118 After Repeated Occurences & 10 Tests Satisfactorily Performed

ML17317B349
Person / Time
Site:	Cook
Issue date:	07/19/1979
From:	Rischling J INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B348	List: 05000316/LER-1979-021, Forwards LER 79-021/03L-0 05000316/LER-1979-021-03, /03L-0 on 790622:starting Time Exceeded Tech Specs During Test on Hydrogen Skimmer Recirculation Fan.Design Change Installed 781118 After Repeated Occurences & 10 Tests Satisfactorily Performed
References
LER-79-021-03L-01, LER-79-21-3L-1, NUDOCS 7907250268
Download: ML17317B349 (3)

LER-1979-021, /03L-0 on 790622:starting Time Exceeded Tech Specs During Test on Hydrogen Skimmer Recirculation Fan.Design Change Installed 781118 After Repeated Occurences & 10 Tests Satisfactorily Performed

Event date:
Report date:
3161979021R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEAR REGULATORYCOMMISSION ICENSEE EVENT REPORT CONTROL BLOCK:

QI

{PLEASE PRINT OR TYPE AI.LREQUIRED INFORMATION)

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LICENSEE'CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 DURING A SURVEILLANCE TEST ON THE HYDROGEN SKXMMER RECXRCULATION pe

FAN, (2-HV-CEQ-l), STARTING TIME WAS 10 MINUTES 13 SECONDS.

THXS 4

EXCEEDED THE T.S.

LIMITS AS SPECIFXED IN T.S. 4.6.5.66a AND T.S.

TABLE 3 3

5 ITEM 7 ~ cl THE TIMER WAS IMMEDIATELY RESET TO WITHIN

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ALLOWABLE LXMITS~

PREVIOUS OCCURRENCES OF A SIMILAR NATURE INCLUDE RO 050 315/75 15I78 34

'OB 80 7

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7 8

ON NOV, 18,

1978, A DESXGN CHANGE WAS INSTALLED IN BOTH UNITS SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~SC Q11 B

Q12

~A013 B

B L A

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Q14

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10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT R EVI5 ION LERIRO EVENT YEAR REPORT NO.

CODE TYPE 017 REPoRT

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~02 1

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21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN Q22 ATTACHMENT NPRD"I PRIME COMP.

COMPONENT 016 ~016 PQ020

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&025 Q26 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27

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INVESTIGATION REVEALED THAT THIS WAS A CONTINUING PROBLEM IN 1978.

CHANGXNG THE AGASTAT TIMERS TO OTHERS WITH A PROPER RANGE.

SINCE 1

3 THXS XNSTALLATXONt THE TIMERS HAVE TESTED SATISFACTORILY TEN

( 10 4

TXMES BEFORE THIS EVENT.

XT IS NOT BELIEVED (SEE SUPPLEMENT) 45 7

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FACILITY M3P METHOD OF STATUS

% POWER OTHER STATUS 0 DISCOVERY DISCOVERY DESCRIPTION Q32 5

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Q26 MA

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10 12 13 44 45 46 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITY~

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LOCATIONOF RELEASE Q Q33

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10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39

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037~z036 80 80 80 7

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11 12 13 PERSONNEL INJURIES a po725-DOCF'0 7

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9 11 12 LOSS OF OR DAMAGETO FACILITY 43 TYPE

DESCRIPTION

Z Q42 NA 9

10 PUBLICITY ISSUED DESCRIPTION~

9 10 J. L. Rischling NAME OF PREPARER 80 68 69 616-465-5901 80 NRC USE ONI.Y ER 2

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SUPPLEMENT TO LER 079-021 03L-0 SUPPLEMENT TO CAUSE DESCRXPTXON THAT THIS EVENT REPRESENTS A REPEATABLE PATTERN WARRANTING FURTHER ACTION AT THIS TIME.

THE POST-LOCA HYDROGEN ANALYSIS HAS BEEN REEVALUATED TO DETERMINE THE EFFECTS OF A 10 MXNUTES 13 SECONDS DELAY IN SYSTEM ACTUATION ON PEAK HYDROGEN CONCENTRATIONS.

THE RESULTS INDICATE THAT THE PEAK LOCAL HYDROGEN CONCENTRATION WOULD HAVE BEEN MAXNTAXNED i

BELOW THE REGULATORY LIMIT OF 4.0 V/O.