05000316/LER-1980-031-03, /03L-0:on 800902,bistable for Containment Pressure hi-hi Protection Set II Tripped at 3.1005 Psig,Exceeding Limiting Conditions for Operation.Caused by Instrument Drift.Bistable Adjusted & Returned to Svc

/03L-0:on 800902,bistable for Containment Pressure hi-hi Protection Set II Tripped at 3.1005 Psig,Exceeding Limiting Conditions for Operation.Caused by Instrument Drift.Bistable Adjusted & Returned to Svc

ML17331A468
Person / Time
Site:	Cook
Issue date:	10/03/1980
From:	Delong S INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17331A467	List: 05000316/LER-1980-031-03, /03L-0:on 800902,bistable for Containment Pressure hi-hi Protection Set II Tripped at 3.1005 Psig,Exceeding Limiting Conditions for Operation.Caused by Instrument Drift.Bistable Adjusted & Returned to Svc 05000316/LER-1980-032-03, /03L-0:on 800904,while Returning East RHR Pump to Svc After Maint,Pump Became Unstable & Declared Inoperable. Caused by Air in Sys During Fill & Vent.Procedure Changed & Problem Eliminated ML17331A466
References
LER-80-031-03L, LER-80-31-3L, NUDOCS 8010090362
Download: ML17331A468 (1)

LER-1980-031, /03L-0:on 800902,bistable for Containment Pressure hi-hi Protection Set II Tripped at 3.1005 Psig,Exceeding Limiting Conditions for Operation.Caused by Instrument Drift.Bistable Adjusted & Returned to Svc

Event date:
Report date:
3161980031R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77),

LICENSE E EVEN T 8 EPORT CONTROL BLOCK:

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{PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

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LICENSEE'CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T KEl soURGE LLJO 0 5

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10

~02 DURING A SURVEILLANCE TEST THE BISTABLE FOR CONTAINMENT PRESSURE HI-HI PROTECTION SET II WAS FOUND TO TRIP AT A VALUE OF 3. 1005 PSIG.

THIS EXCEEDS THE LCO VALUE STATE

~o4 IN TECHNICAL SPECIFICATION TABLE 3.3-4.

THE APPLICABLE ACTION RE UIREMENT SPECIFIED

~os BY TECHNICAL SPECIFICATION TABLE 3.3-3 HAS FULFILLED.

PREVIOUS OCCURRENCES INCLUDE:

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U" UO 21 22 23 24 26 27 28 29 30 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRD 4 PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS

&22 SUBMITTED FORM SUB.

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THE AFFECTED BISTABLE FOXBORO-63U-BC-OHEA-F WAS ADJUSTED TO WITHIN ALLOWABLE LIMITS AND RETURNED TO SERVICE.

A RECHECK OF THE BISTABLE TRIP POINT ON SEPTEMBER 473 INDI~

CATED THAT THE TRIP POINT HAD AGAIN DRIFTED.

THIS TIME IN THE CONSERVATIVE DIRECTION

~l3 A SIttILAR AMOUNT AS THE ADJUSTMENT MADE ON 9 2 80.

THE BISTABLE HAS BEEN CHECKED 4

DAILY SINCE AND THERE HAS BfEN NO INDICATION OF SIGNIFICANT INSTRUMENT DRIFT.

ACTIVITY CONTENT RELEASEO OF REI.EASE AMOUNTOF ACTIVITY DZG L~J Q L~JQ34 NA 7

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10 11 44 PERSONNEl EXPOSURES NUMBER TYPE DESCRIPTION Q39

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FACILITY

~3O METHOD OF STATUS BB POWER OTHER STATUS Q DISCOVERY 1

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9 10 12 13 44 45 46 DISCOVERY DESCRIPTION Q32 SURVEILLANCE TESTING (F

LOCATIONOF RELEASE Q NA 80 80 80 7

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11 12 13 PERSONNEl INJURIES NUMBER DESCRIPTION 41 PaZ Loaoo ls 7

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11 12 LOSS OF OR DAMAGETO FACILITY 43 TYPE

DESCRIPTION

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