05000316/LER-1979-001-03, /03L-0 on 790111:at 100% Power,Quadrant Power Tilt Ratio Alarm Per Tech Spec 4.2.4 Was in Error.Calculation of Tilt Ratio Is Required Every 12-h;first Survey Was Missed Because Alarm Instruments Were Being Calibr

/03L-0 on 790111:at 100% Power,Quadrant Power Tilt Ratio Alarm Per Tech Spec 4.2.4 Was in Error.Calculation of Tilt Ratio Is Required Every 12-h;first Survey Was Missed Because Alarm Instruments Were Being Calibr

ML17317A913
Person / Time
Site:	Cook
Issue date:	01/31/1979
From:	Lease R INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317A912	List: 05000316/LER-1979-001, Forwards LER 79-001/03L-0 05000316/LER-1979-001-03, /03L-0 on 790111:at 100% Power,Quadrant Power Tilt Ratio Alarm Per Tech Spec 4.2.4 Was in Error.Calculation of Tilt Ratio Is Required Every 12-h;first Survey Was Missed Because Alarm Instruments Were Being Calibr
References
LER-79-001-03L, LER-79-1-3L, NUDOCS 7902050122
Download: ML17317A913 (2)

LER-1979-001, /03L-0 on 790111:at 100% Power,Quadrant Power Tilt Ratio Alarm Per Tech Spec 4.2.4 Was in Error.Calculation of Tilt Ratio Is Required Every 12-h;first Survey Was Missed Because Alarm Instruments Were Being Calibr

Event date:
Report date:
3161979001R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSION QS 4>>

QS~QS 25 26 LICENSE TYPE 30 57 CAT 58 QB 80

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LlCENSEE EVENT REPORT CONTROL17LOCK:

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

~02 OPERATING AT 100K POWER THE UADRANT POWER TILT RATIO ALARM PER T C

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IN ERROR.

THIS REQUIRES CALCULATION OF THE TILT RATIO EACH 12 HRS.

THE FIRST 12 HOUR SURVEILLANCE WAS MISSED.

REACTOR POWER WAS CONSTANT, WITH E UILIBRIUM XENON.

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PROBABLE CONSEQUENCES.

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28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDQ PRIME COMP.

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THE UADRANT POWER TILT ALARM WAS OPERABLE BUT IN ERROR BECAUSE THE INSTRUMENTS FROM 47Q

'WHICH THE ALARM CALCULATES..WERE BEING CALIBRATED. MAXIMUM ERROR WOU D

H V PROCEDURE HAS BEEN REVISED TO RE UIRE HAND CALCULATION WHILE THESE INSTRUMENTS ARE BEING CALIBRATED.

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11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTIONO41 9

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