05000219/LER-1980-015-03, /03L-0:on 800403,piston Rod on Closure Mechanism for Reactor Bldg Ventilation Automatic Isolation Valve Was Found Broken,Making Valve Inoperable.Caused by Component Failure.New Piston Rod Eye Stud Was Fabricated & Installed

/03L-0:on 800403,piston Rod on Closure Mechanism for Reactor Bldg Ventilation Automatic Isolation Valve Was Found Broken,Making Valve Inoperable.Caused by Component Failure.New Piston Rod Eye Stud Was Fabricated & Installed

ML19323C956
Person / Time
Site:	Oyster Creek
Issue date:	05/07/1980
From:	Ross D JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19323C953	List: 05000219/LER-1980-015, Forwards LER 80-015/03L-0 05000219/LER-1980-015-03, /03L-0:on 800403,piston Rod on Closure Mechanism for Reactor Bldg Ventilation Automatic Isolation Valve Was Found Broken,Making Valve Inoperable.Caused by Component Failure.New Piston Rod Eye Stud Was Fabricated & Installed
References
LER-80-015-03L, LER-80-15-3L, NUDOCS 8005190463
Download: ML19323C956 (3)

LER-1980-015, /03L-0:on 800403,piston Rod on Closure Mechanism for Reactor Bldg Ventilation Automatic Isolation Valve Was Found Broken,Making Valve Inoperable.Caused by Component Failure.New Piston Rod Eye Stud Was Fabricated & Installed

Event date:
Report date:
2191980015R03 - NRC Website

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60 61 DOCKET NUM8ER 68 69 EVENT CATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 101011 On April 3, 1980 an operator found the oiston rod on the c l o e n re

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l 1o631 1 anism for the reactor building ventilation automatic isolation valve I

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The valve was inoperable and therefore secondarv i

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Morristown, New Jersey 07960 (201)455-8200 OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jerse/ 08731 Licensee Event Report Reportable Occurrence No. 50-219/80-15/3L Report Date May 7, 1980 Occurrence Date April 3, 1980 identification of Occurrence Degradation of secondary containment integrity when it was determined that Reactor Building ventilation system automatic isolation valve h 39) was inoperable.

This is a violation of a limiting condition for oper tion as per Technical Specificaticn 3 5.B.1.

This event is considered to be a reportable occurrence as defined in the Techni-cal Specifications, paragraph 6.9.2.b(4).

Conditions Prior to Occurrence The plant was shutdown for a refueling / maintenance outage.

The reactor was subcritical.

The reactor mode switch was locked in refuel.

The cavity was flooded.

Descriotion of Occurrence On Thursday, April 3,1980, an operator found the piston rod on the closure mechanism for the Reactor Building ventilation automatic isolation valve (V-28-39) broken.

The valve was secured in the closed position as required by the Technical Specification. A Job Crder (5054M) was initiated to repair the valve.

Acoarent Cause of Occurrence Piston rod eye stud was broken. The cause of the failure was undetermined.

Analysis of Occurrence Secondary containment is designed to minimize any ground level release of radio-active materials which might result from an accident.

The Reactor Building Jersey Centra! Power & L:gr.t Company is a Member cf me General Puclic UtMt:es System

Reportable Occurrence No. 50-219/80-15/3L Page 2 May 7, 1980 provides secondary containment during reactor operation when the drywell is sealed and in service and provides primary containment when the reactor. is shutdown and the drywell is open.

Secondary containment is required during fuel handling operations and whenever work is being performed on the reactor or its connected systems in the Reactor Building, since their operation could result in an inadvertant release of radioactive material.

V-28-39 is one of a set of two air operated valves in series that will close automatically upon a shutdown or isolation signal.

On Monday, April 1, 1980, the valve was surveilled and no problems were detected.

Two days later the va:ve was found inoperable and removed from service.

The safety significance of this event is considered minimal because the inoperability of V-28-39 only removed the redundancy to isolate the system not preventing the (fstem from per-forming its intended function.

Corrective Action

A new piston rod eye stud was fabricated and installed.

The spare parts list will be reviewed to include the recommended amount of spare parts.

Additionally, the piston rod eye studs will be inspected on all the Reactor Building ventila-tion automatic isolation valves.

Failure Data Manufacturer:

Rockwell Manufacturing Company size:

18" Type: Air Operated Butterfly n