05000366/LER-1980-029-01, /01T-0:on 800325,during 18-month Surveillance Test on Emergency Station Battery Chargers 2G & 2J,both Failed to Maintain Respective Loads.Caused by Voltage Control Module & Current Limit Module Requiring Fine Tuning

/01T-0:on 800325,during 18-month Surveillance Test on Emergency Station Battery Chargers 2G & 2J,both Failed to Maintain Respective Loads.Caused by Voltage Control Module & Current Limit Module Requiring Fine Tuning

ML19305C958
Person / Time
Site:	Hatch
Issue date:	04/03/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19305C954	List: 05000366/LER-1980-029, Forwards LER 80-029/01T-0 05000366/LER-1980-029-01, /01T-0:on 800325,during 18-month Surveillance Test on Emergency Station Battery Chargers 2G & 2J,both Failed to Maintain Respective Loads.Caused by Voltage Control Module & Current Limit Module Requiring Fine Tuning
References
LER-80-029-01T, LER-80-29-1T, NUDOCS 8004110483
Download: ML19305C958 (2)

LER-1980-029, /01T-0:on 800325,during 18-month Surveillance Test on Emergency Station Battery Chargers 2G & 2J,both Failed to Maintain Respective Loads.Caused by Voltage Control Module & Current Limit Module Requiring Fine Tuning

Event date:
Report date:
3661980029R01 - NRC Website

text

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NRC FORM 366

- U.S.NUCLEA7 REIULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT CONTROL block: l l

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8 60 61 DOCKET NUMBER 66 69 EVENT DATE F4 7b REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUEf CES h 0 2 lDuring 18-month surveillante tests on emergency station battery chargersi [013112G and 2J, both chargers failed to maintain their respective loads per i

O 4 junit 2 Tech Specs 4.8.1.1.3.c.3.

Failure of the chargers to comply withi l Tech Specs surveillance requires the chargers to be considered inop.

I O s oo l Deviation reports 2-80-112 and 2-80-113 were written as a result of the f l failures, and there were no effects upon public health and safety due l

0 7 10181 l to this event.

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9 10 11 12 13 18 19 20 SEQUENTIAL OCCUR RENCE REPORT REVISION LER EVENT VE AR REPORT NO.

CODE TYPE N O.

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lE l3 l5 l5 l@l 33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h IThe voltage control module and current limit module required fine tuningl i O Ifor them to operate correctly.

The charcers were capable of carryino I

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! their normal loads and recharging the associated battery.

The 2G and I

i 2 l2J chargers passed their surveillance requirements on 3-25-80 bringing i

i 3 i 4 Ithe unit into compliance with the requirements.

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% POWER OTHER STATUS DISCO RY DISCOVERY DESCRIPTION

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8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE

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1 7 PERSON ~c'L iN;uWiES NUMBER OESCRIPTION lOlOl0l@l NA l

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T NAME oF PREPARER

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LER #:

50-366/1930-029 Georgia Power Company Licensee:

Facility Name:

Edwin I. Hatch Docket f:

50-366

Narrative

Reoort for LER 50-366/1080-020 During 13-month surveillance tests on emergency

' station chargers SG and 2J, the chargers failed to maintain their resnective loads per Unit 2 Tech Specs section 4.3.1.1.3.c.9.

Failure of the chargers to comply with Tech Specs surveillance requires the chargers to be considered inoo.

A maintenance request was issued to repair or adjust the chargers as necessa"y, and the vendor representative assisted the site in correcting the situation.

The voltage control and current limiting modules required adjustments to allow the cha"gers to O

operate under 1.oad required by Tech Specs.

The chargers were V

subsequently tested successfully bringing the unit into compliance with the requirements.

The charge =s used on Unit 1 are identical to those on Unit 2.

The problem is applicable to Unit 1.

There is no Tech Specs surveillance requirement on the Unit 1

emergency station batteay chargers; howeve",

they vill be checked during the first cold shutdown of sufficient duration.

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