05000315/LER-1979-050-03, /03L-0:on 790929,during Surveillance Test,Steam Generator Water Level low-low Bistable Drifted Excessively. Caused by Defective Bistable.Bistable Replaced,Calibr,Tested & Returned to Svc

/03L-0:on 790929,during Surveillance Test,Steam Generator Water Level low-low Bistable Drifted Excessively. Caused by Defective Bistable.Bistable Replaced,Calibr,Tested & Returned to Svc

ML17326A294
Person / Time
Site:	Cook
Issue date:	10/25/1979
From:	Rischling J INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17318A372	List: 05000315/LER-1979-050, Forwards LER 79-050/03L-0 05000315/LER-1979-050-03, /03L-0:on 790929,during Surveillance Test,Steam Generator Water Level low-low Bistable Drifted Excessively. Caused by Defective Bistable.Bistable Replaced,Calibr,Tested & Returned to Svc
References
LER-79-050-03L, LER-79-50-3L, NUDOCS 7910300223
Download: ML17326A294 (2)

LER-1979-050, /03L-0:on 790929,during Surveillance Test,Steam Generator Water Level low-low Bistable Drifted Excessively. Caused by Defective Bistable.Bistable Replaced,Calibr,Tested & Returned to Svc

Event date:
Report date:
3151979050R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSION '

NRC FORM 3664 I7-777'NSEE EVENT REPORT 1

CQNTRMBLOCK:

QI (PLEASE PRINT OR TYPE ALLREOUIRED INFORMATION)

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LICENSEE'CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T L~JQB0 50 o

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'Q DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES ~10 WHILE PERFORMING A SURVEILLANCE TEST ON STEAM GENERATOR PROTECTION SET 3 i LOOP 3 i IT WAS DISCOVERED THAT THE STEAM GENERATOR WATER

~O3 LEVEL-LOW-LOW BISTABLE WAS DRXFTING EXCESSIVELY.

THIS BISTABLE 4

WAS DETERMINED INOPERABLE AND NON-CONSERVATIVE TO T.S.

TABLE 3.3-1

~os ITEM 14.

THE BISTABLE WAS LEFT IN THE TRIP POSITION AS REQUIRED BY THE APPLICABLE ACTION REQUIREMENT ~

PREVIOUS OCCURRENCES

OF A S XMILAR 7

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NATURE INCLUDE 050315/7852/050316/797

~

80 7

8 6 3U AC OHAA F i WAS REPLACED ~

THE NEW BISTABLE WAS CALIBRATED 6 SYSTEM

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CAUSE COMP.

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10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LERIRP EVENT YEAR REPORT NO.

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Q11 REPORT ~79

~

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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 ILOUR) i+22 SUBIQTTED FORM+6.

SUPPLIER JANUSAC'gJRE(

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS &27 THE DEFECTIVE BISTABLE; MAN13PACTURED BY FOXBORO-MODEL NUMBER

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'TESTED WITH THE APPROPRIATE SURVEXLLANCE TEST PROCEDURE,,

3 AND RETURNED TO SERVICE

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9 FACILITY STATUS

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9 10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUN@TF ACTIVITYQ 6

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10 44 PERSONNEL EXPOSURES 7

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11 12 13 PERSONNEL INJURIES zz L-'~" o'"'"'"""Q METHOD OF DIS/OVERY D~RY DESCRIPTION Q32

~Q31 SURVEILLANCE 45 46 LOCATIONOF RELEASE Q 45 7f/~3o5Zzz 80 80 80 80 7

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NAME OF PREPARER J. L. Rischling 9

11 12 LOSS OF OR DAMAGETO FACILITY 43 TYPE

DESCRIPTION

Z Q4, NA 9

10 PUBLICITY ISSUED DESCRIPTION~

9 10 80 N.6-465-5901 PHONE:

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