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

/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

ML17331A157
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-80-020-03L, LER-80-20-3L, NUDOCS 8005270456
Download: ML17331A157 (1)

LER-1980-020, /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

Event date:
Report date:
3161980020R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7.77)

ICENSEE EVENT REPORT CONTROL BLOCK:

Ql (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 [0D1]

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0 Q 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 RFPORT DATF 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES +10

~o2 DURING NORMAL OPERATION IT WAS NOTICED THAT STEAM-LINE DIFFERENTIAL PRESSURE BETWEEN LOOPS 1

AND' WAS EXCESS IVE.

A CALIBRATION CHECK OF STEAM GENERATOR 4

MISMATCH TRANSMITTER MPP-210 REVEALED IT HAD DRIFTED.

AS A RESULT, THE BISTABLE

~os TRIP POINTS EXCEEDED THE LCO LIMITS FOR HIGH STEAN LINE DIFFERENTIAL PRESSURE AND 6

STEAM LINE PRESSURE LOW:

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TABLE 3 ~ 3-4 ITEMS 1. e, 1.f AND 4. e.

THE APPLICABLE

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ACTION REQUIREMENTS WERE FULFILLED.

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CAUSE COMP VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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9 10 11 12 13 18 19 20 SEOUENTIAL OCCURRENCE REPORT REVISION LFRIRO FVENT YEAR REPORT NO.

CODE TYPE NO.

Q37 833083

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~OS 21 22 23 24 26 27 28 29 30 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDR PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS O22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER

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INVESTIGATION REVEALED THE CAUSE 5F THIS EVENT TO BE INSTRUMENT DRIFT.

THE TRANSMITTER WAS CALIBRATED AND RETURNED TO SERVICE.

LATER, THE TRANSMITTER WAS RECHECKED TO INSURE NO SUBSEQUENT DRIFTING HAD OCCURRED.

THE TRANSMITTER 3

WAS MANUFACTURED BY FOXBORO, MODEL E 1 1 GM-HSAE 1

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FACILITY STATUS SE POWER OTHER STATUS 1

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29 NA METHOD OF DISCOVERY L~JQ>>

45 46 45 NAME OF PREPARER J.

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RISCHLING CO EQ~OQ ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ

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10 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 039 7 ~00 0

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11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTIONQ41 8 ~00 0

Q48 NA 7

8 9

11 12 LOSS OF OR DAMAGETO FACILITY0 TYPE

DESCRIPTION

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10 PUBLICITY ISSLI "SD

DESCRIPTION

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10 NA LOCATION OF RELEASE 80 80 80 80 g'oos ~2u 456 80 80 NRC USE ONLY 3

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0 a'8 69 616-465-5901 DISCOVERY DESCRIPTION 032 OPERATOR OBSERVATION