05000366/LER-1980-092-03, /03L-0:on 800611,during Surveillance Checks at steady-state Power,Operators Found B Rod Block Monitor Bypassed While Selecting Rods.Caused by Component Failure. Power Supply Repaired & Returned to Svc

/03L-0:on 800611,during Surveillance Checks at steady-state Power,Operators Found B Rod Block Monitor Bypassed While Selecting Rods.Caused by Component Failure. Power Supply Repaired & Returned to Svc

ML19326D770
Person / Time
Site:	Hatch
Issue date:	06/24/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19326D767	List: 05000366/LER-1980-092, Forwards LER 80-092/03L-0 05000366/LER-1980-092-03, /03L-0:on 800611,during Surveillance Checks at steady-state Power,Operators Found B Rod Block Monitor Bypassed While Selecting Rods.Caused by Component Failure. Power Supply Repaired & Returned to Svc
References
LER-80-092-03L, LER-80-92-3L, NUDOCS 8007030282
Download: ML19326D770 (2)

LER-1980-092, /03L-0:on 800611,during Surveillance Checks at steady-state Power,Operators Found B Rod Block Monitor Bypassed While Selecting Rods.Caused by Component Failure. Power Supply Repaired & Returned to Svc

Event date:
Report date:
3661980092R03 - NRC Website

text

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J' LICENSEE EVENT REPORT U+

CONTROL BLOCK:

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8 60 61 DOCKET NUMBER em 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 l While performinn surveillance checks at steadv-state nower onerators found i

O 3 l the 'B' RBM remained bypassed while selecting rods. At this power icvel l

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with no edge rod selected, both RBM's are required to monitor core power 1

o s l 1evel. 'Ihere was no ef fect upon public health or safety, ner was safe plant I

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operation affected by this incident. This is not a repetitive event.

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'VE ACTIONS h CAUSE DESCRIPTION AND CORREL Ii 10 l l The cause of the f ailure has been attributed to component failure.

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+20V nower suonD failed renderinn the manitor inoperative.

The power i

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Procedure HNP-2-3055, I

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RBM FT&C. was performed satisf actorily to prove operabiltiy.

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% POWER OTHER STATUS IS O RY DISCOVERY DESCRIPTION l E l@ l 0] 9l 8l@l NA l

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NARRATIVE

REPORT Georgia Power Company Plant E. l.-Hatch Baxley, Georgia 31513 Reportable Occurrence Report No. 50-366/1980-092.

The reactor operator discovered RBM

'B' ineperable while performing surveillance checks per the daily rounds procedure, HNP-2-1050. The RBM should have been operable at 98% power and no edge rod selected. There was no effect upon public health and safety nor was safe plant operation affected. This was a non-repetitive event.

The monitor failed due to an inoperative power supply. The power supply was repaired and the monitor returned to service. Procedure llNP-2-3055, REM -Functional Test and Calibration, was performed satisfactorily.

The generic review of the event did not reveal any inherent problems.

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