05000296/LER-1981-026-03, /03L-0:on 810522,during Normal Operation,Operator Observed That Drywell Unidentified Leakage Exceeded Tech Spec Limit.Caused by Packing Stem Leak in Valve 3 FCV-68-79. Valve Stem Dressed.Stem Will Be Evaluated for Replacemen

/03L-0:on 810522,during Normal Operation,Operator Observed That Drywell Unidentified Leakage Exceeded Tech Spec Limit.Caused by Packing Stem Leak in Valve 3 FCV-68-79. Valve Stem Dressed.Stem Will Be Evaluated for Replacement

ML19346A397
Person / Time
Site:	Browns Ferry
Issue date:	06/15/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19346A394	List: 05000296/LER-1981-026, Forwards LER 81-026/03L-0 05000296/LER-1981-026-03, /03L-0:on 810522,during Normal Operation,Operator Observed That Drywell Unidentified Leakage Exceeded Tech Spec Limit.Caused by Packing Stem Leak in Valve 3 FCV-68-79. Valve Stem Dressed.Stem Will Be Evaluated for Replacemen
References
LER-81-026-03L, LER-81-26-3L, NUDOCS 8106190266
Download: ML19346A397 (2)

LER-1981-026, /03L-0:on 810522,during Normal Operation,Operator Observed That Drywell Unidentified Leakage Exceeded Tech Spec Limit.Caused by Packing Stem Leak in Valve 3 FCV-68-79. Valve Stem Dressed.Stem Will Be Evaluated for Replacement

Event date:
Report date:
2961981026R03 - NRC Website

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l.iii) l Radiological Emergency. Plan. Unit was manually scra_mme_d_and taken to cold shutdown.

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i U] l.Drywell,, entry _ revealed a packing stem leac in valve 3 FCV-68-79. There was no l.i.Jl danger.to the_he.alth or safety of the public. There were no redundant systems.

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m.'.C 11(:^.illO P,f 0*4 AND CCH61ki TIV E ACit0NS h gg l Valve stem packing blew out, possibly initiated by a scarred spot on the valve stem.

j [i [ --) [ Graphoil valve packing was replaced on the Darling Valve Company, Model 5150W DD, j

28 x 24 x 28 gate valve, design pressure 1326 psi, nonnal operating pressure 3

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[ q ; 1000 psi. Recurrence control: the valve stem was dressed and will be evaluated g

for replacement at the next unit 3 refueling outage.

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• Date due NRC: 6/22/81 i

i n.f a of Occurrence 5/25/81 Time of Occurrence 0045 Unit 3

Identification and I;escription of Occurrence.

Drywell unidentified leakage of 21.5 gallons per minute.

Conditions Prior to Occurrence.

Unit I refueling outage IJnit 2 at 99%

unit 3 at 99%

Action specifie<! in the Technical Specification Surveillance Requirements met i

11 noperable effipuient. Describe

..ir Initiated manual scram, brought unit to cold shutdown, and replaced valve packing.

1.pp.o e nt Cau,e of ' P currence Valve stem packing blew out, possibly initiated by a scarred spot on the valve stem.

Aria;yst3 of_ Ortiurrenc.

There was no danger to the health or safety of the public, no release of activity, no damage to the plant or equipment, and no resulting significant chain of events.

Corrective Action

Graphoil valve packing was replaced. Recurrence control: the valve stem was dressed and will be evaluated for replacement at the next unit 3 refueling outage.

l'ailure Data -

None 1(eten tion :

Perp3 - 1.ifetune. itesponsibility - Document Ccntrol Supervisor 1

• ltevision :

P00R ORIGINAL