05000321/LER-1982-088-03, /03L-0:on 820924,HPCI Inboard Valve Operator Failed W/Rcic Tagged Out for Maint.Caused by Failure of Dc Motor Windings.Motor Replaced & Valve Successfully Tested

/03L-0:on 820924,HPCI Inboard Valve Operator Failed W/Rcic Tagged Out for Maint.Caused by Failure of Dc Motor Windings.Motor Replaced & Valve Successfully Tested

ML20027D364
Person / Time
Site:	Hatch
Issue date:	10/21/1982
From:	Tipps S GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20027D354	List: 05000321/LER-1982-088, Forwards LER 82-088/03L-0 05000321/LER-1982-088-03, /03L-0:on 820924,HPCI Inboard Valve Operator Failed W/Rcic Tagged Out for Maint.Caused by Failure of Dc Motor Windings.Motor Replaced & Valve Successfully Tested
References
LER-82-088-03L-01, LER-82-88-3L-1, NUDOCS 8211040200
Download: ML20027D364 (2)

LER-1982-088, /03L-0:on 820924,HPCI Inboard Valve Operator Failed W/Rcic Tagged Out for Maint.Caused by Failure of Dc Motor Windings.Motor Replaced & Valve Successfully Tested

Event date:
Report date:
3211982088R03 - NRC Website

text

NRC FCRM 366 U.S. NUCLEAR REGULATORY COMMISSION (7 77)

LICENSEE EVE,NT REPORT CONTROL BLOCK: l l

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60 61 JOCKET NUMB ER 68 69 EVENT DATE 74 75 REPORT DATE 80 lol2llWith Unit One operating steady h EVENT DESCRIPTION AND PROBABLE CONSEQUENCES state at 2209 MWt, the HPCI inboard dis-IOtalIcharge valve's operator failed while performing the "HPCI VALVE OPERABI-l l o l4 l lLITY" procedure. HPCI was declared inoperable. RCIC was tagged out for loisIimaintenance. With both HPCI and RCIC inoperable, a 24-hour LCO was init-l 10 is I l ated as per Tech. Specs.

3.5.D.3.

RCIC was returned to service.

A i

lol71l14-day LCO was initiated and RCIC, LPCI, ADS and CS operability was demog iOla1istrated per T.S.

3.5.D.2.

Public's health and safety were not affected. ;

7 8 9 80 DE CODE SU8C E COMPONENT CODE SudC DE S

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3 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORhECTIVE ACTIONS 27 1i101lThis event was caused by the failure of the va}ve's D.C.

motor windings.l l1 11 l LThe D.C.

motor was replaced, and the valve was successfully tested on I

i 2 19/26/82.

A design chance has been aporoved which will replace the l

l i l a l l existing valve operator with an environmentally qualified motor.

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7 8 9 80 STA S

% POWER OTHER STATUS ISCO RY DISCOVERY DESCRIPTION

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POR ADOCK 05000321 NUMBER l0l0l0l@l NA S

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NAME OF PREPARER PHONE:

f:

LER No.:

50-321/1982-088 Licensee:

Georgia Power Company Facility:

Edwin I.

Hatch Docket #:

50-321

Narrative

Report for LER 50-321/1982-088 On September 24, 1982, with Unit Unit One operating at steady-state at-2209 MWt, the HPCI inboard discharge valve's motor operator failed while performing the "HPCI VALVE OPERABILITY" Procedure.

The HPCI system was declared inoperable.

The RCIC system was already out of service for maintenance.

With both HPCI and RCIC inoperable, a 24-i hour L3) was initiated in accordance with Tech. Specs.

3.5.D, Action 3.

The plant was not shutdown since the RCIC system was returned to service and was demonstrated to be operable within the 24-hour period.

With IIPCI inoperable, a 14-day LCO was placed on the Unit per Tech.

Specs.

3.5.D, Action 2.

The ADS actuation logic, the RCIC system, the RHR system LCPI mode, and the Core Spray system were demonstrated to be operable.

The health and safety of the public were not affected 2

i by this non-repetitive event.

1 The failure of the valve operator was due to failure of the D. C.

motor windings.

The motor was replaced, and the valve was successfully cycled with proper light indication.

The HPCI system was returned to cperable status on September 26, 1982.

A design Change Request has been apprcved which will replace the existing valve motor with an environmentally qualified motor.

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