05000321/LER-1981-050-03, /03L-0:on 810612,while Performing RHR Valve Operability,Containment Spray Isolation Valve B Found Inoperative.Caused by Incorrect Installation of Motor Pinion Gear.Motor Pinion Gear Reinstalled

/03L-0:on 810612,while Performing RHR Valve Operability,Containment Spray Isolation Valve B Found Inoperative.Caused by Incorrect Installation of Motor Pinion Gear.Motor Pinion Gear Reinstalled

ML20009F566
Person / Time
Site:	Hatch
Issue date:	06/30/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009F562	List: 05000321/LER-1981-050, Forwards LER 81-050/03L-0 05000321/LER-1981-050-03, /03L-0:on 810612,while Performing RHR Valve Operability,Containment Spray Isolation Valve B Found Inoperative.Caused by Incorrect Installation of Motor Pinion Gear.Motor Pinion Gear Reinstalled
References
LER-81-050-03L-01, LER-81-50-3L-1, NUDOCS 8107310309
Download: ML20009F566 (2)

LER-1981-050, /03L-0:on 810612,while Performing RHR Valve Operability,Containment Spray Isolation Valve B Found Inoperative.Caused by Incorrect Installation of Motor Pinion Gear.Motor Pinion Gear Reinstalled

Event date:
Report date:
3211981050R03 - NRC Website

text

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60 61 DOCKET NUMBER 68 69 EVENT DAT2 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l O ; 21 l With the reactor in the start-up and hot standby mode, while performina l

RHR Valve Operability due to HPCI being inoperable, "B" Containment Spray 1

10;3; l 1014i l Isolation Valve was found to be inoperative.

Limiting conditions for l

IO 1si l operations wera implemented per Tech Spec 3.5.D.3.

There were no effects i

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Motor pinion gear was I

i, i3i l reinstalled correctly and valve was-proven operable.

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NAME OF PREPARER

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LER No.: 50-321/1981-50 Licensee: Georgia Power Company Facility: Edwin I. Hatch Docket No. : 50-321

Narrative

Report for LER 50-321/1981-050.

i -

On June 5, 1981, with the reactor in the start-up and hot standby mode HNP-1-3162, RHR Valve Operability Test, was being performed.

During this test, IE11-F0288, Containment Spray Isolation Valve, failed to operate.

Due to HPCI being inoperable, Tech Spec 13.5.D.2 requires this valve to be operable. There were no effects upon public health and safety due to this event.

This is a non-repetitive event.

An investigation revealed the valve failed to operate due to improper

. Since the gear had been installation of the motor pinion drive gear.

improperly installed, it would not mesh with the valve drive gear, thus not allowing the valve to operate.

The motor pinion drive gear was re-moved and re-installed correctly.

RHR valve operability was then performed with all results satisfactory and RHR returned to service.

A generic review revealed no int.erent problems.

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