05000316/LER-1980-021-03, /03L-0:on 800429,while Performing Surveillance Test,Discovered Bistable for Steam Generator Water Level hi-hi Engineered Safety Feature Setpoint Exceeding Limit W/ Recurrence on 800430.Bistable Replaced & Calibr

/03L-0:on 800429,while Performing Surveillance Test,Discovered Bistable for Steam Generator Water Level hi-hi Engineered Safety Feature Setpoint Exceeding Limit W/ Recurrence on 800430.Bistable Replaced & Calibr

ML17331A158
Person / Time
Site:	Cook
Issue date:	05/20/1980
From:	Rischling J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17331A156	List: 05000316/LER-1980-020-03, /03L-0:on 800421,during Normal Operation,Noticed Excessive Steam Line Differential Pressure Between Loops 1 & 2.Caused by Instrument Drift.Transmitter Calibr & Returned to Svc 05000316/LER-1980-021-03, /03L-0:on 800429,while Performing Surveillance Test,Discovered Bistable for Steam Generator Water Level hi-hi Engineered Safety Feature Setpoint Exceeding Limit W/ Recurrence on 800430.Bistable Replaced & Calibr ML17331A155
References
LER-80-021-03L, LER-80-21-3L, NUDOCS 8005270461
Download: ML17331A158 (2)

LER-1980-021, /03L-0:on 800429,while Performing Surveillance Test,Discovered Bistable for Steam Generator Water Level hi-hi Engineered Safety Feature Setpoint Exceeding Limit W/ Recurrence on 800430.Bistable Replaced & Calibr

Event date:
Report date:
3161980021R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION lCENSEE EVENT REPORT "CONl ROL BLOCK:

(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

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0 Qs DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES 010 DURING NORMAL OPERATION WHILE PERFORMING A SURVEILLANCE TEST IT WAS DISCOVERED

~O3 THAT THE BISTABLE FOR STEAM GENERATOR WATER LEVEL Hi-Hi ESF SETPOINT TURBINE TRIP AND FEEDWATER ISOLATION) HAD DRIFTED HIGH EXCEEDING THE LCO VALUE.

T.S.

TABLE 3.3-4 ITEM 5.a.

THE APPLICABLE ACTION REQUIREMENT WAS MET.

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'13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LERgRP EVENT YEAR REPORT NO.

CODE TYPE NO.

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Uo 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATI'ACHMENT NPRDQ PRIME COMP.

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P Q26 33 34 35 36 37 40 41 42 43 44 47 CAU E ESCRIPTION AND CORRECTIVE ACTION 027 THE BISTABLE WAS RECALIBRATED AND RETURNED TO SERVICE.

ON APRIL 30,

1980, THE BISTABLE TRIP POINT WAS AGAIN CHECKED.

THE SETPOINT HAD DRIFTED SIGNIFICANTLY AND THE BISTABLE (FOXBORO-MODEL 63 U-BC-OHEM-F)

WAS REPLACED.

THE NEW BISTABLE WAS 3

CALIBRATED AND PLACED IN SERVICE.

METHOD OF DISCOVERY OTHER STATUS Q NA LAJQ>>

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10 PERSONNEL EXPOSURES 7,8 9

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11 12 LOSS OF OR DAMAGETO FACILITY 43 TYPE

DESCRIPTION

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10 PUBLICITY ISSUED DESCRIPTION0 MQ44 N

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10 NA LOCATIONOF RELEASE f0052 7y NRC USE ONLY 68 69 616-465-5901 DISCOVERY DESCRIPTION 32 OPERATOR OBSERVATION 80 80 80 80 80 80

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