05000296/LER-1980-038-03, /03L-0:on 800907,during Surveillance Testing,Msiv 3-FCV-1-26 Closed Too Fast.Caused by Low Oil Level in Hydraulic Cylinder.One Gallon of Oil Added & Flow Control Valve Adjusted to Obtain Correct Valve Speed

/03L-0:on 800907,during Surveillance Testing,Msiv 3-FCV-1-26 Closed Too Fast.Caused by Low Oil Level in Hydraulic Cylinder.One Gallon of Oil Added & Flow Control Valve Adjusted to Obtain Correct Valve Speed

ML19351D637
Person / Time
Site:	Browns Ferry
Issue date:	10/06/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19351D636	List: 05000296/LER-1980-038, Forwards LER 80-038/03L-0 05000296/LER-1980-038-03, /03L-0:on 800907,during Surveillance Testing,Msiv 3-FCV-1-26 Closed Too Fast.Caused by Low Oil Level in Hydraulic Cylinder.One Gallon of Oil Added & Flow Control Valve Adjusted to Obtain Correct Valve Speed
References
LER-80-038-03L-03, LER-80-38-3L-3, NUDOCS 8010140390
Download: ML19351D637 (2)

LER-1980-038, /03L-0:on 800907,during Surveillance Testing,Msiv 3-FCV-1-26 Closed Too Fast.Caused by Low Oil Level in Hydraulic Cylinder.One Gallon of Oil Added & Flow Control Valve Adjusted to Obtain Correct Valve Speed

Event date:
Report date:
2961980038R03 - NRC Website

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ptPORTDATt 83 LVENT DESCHsPTION AND PROS A8LE CONSEcutNCES h t o 121 LWith unit at 99 percent steady state power, main steam isolation valve 3-FCV-1-26 l

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g 9. -er Tennessee Valley Authority Form BF-17 Browns Ferry Nucicar Plant BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO-50 296 / 8G38 Technical Specification Involved 3.7.D.1 Re' ported Under Technical Specification

6. 7. 2. b (2)

Date of Occurrence 9/7/80 3:30a.m.

3 Time of Occurrence Unit Identification and Description ^of Occurrence:

While running SI 4.7.D.lb.2 with unit at 99% steady state power, main steam isolation valve FCV 3-1-26 clor d too f ast.

Conditions ' Prior to Occurrence:

Unit 1 - 96% steady state power.

Unit 2 - scheduled refueling outage Unit 3 - 99% steady state power Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. Describe.

A, C, and D main steam lines were operable Apparent Cause of Occurrence:

i The oil level was low in the liydraulic cylinder. No leaks were detected..

Analysis of Occurrence:

l There was no danger to the health or safety of the public, no damage to plant or equipment and no release of activity. There vas a power reduction to 75%

for 144 hours0.00167 days <br />0.04 hours <br />2.380952e-4 weeks <br />5.4792e-5 months <br />, and a unit outage for approximately 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

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Corrective Action

Valve was closed until one gallon of oil was added to cylinder and valve was tested satisf actorily.

FaGure Data:

LER BFRO-50-296/78014, 296/78013, 259/74002, 259/74012, 259/74038.

• Retention :

eriod - Lifetime; Responsibility - Administrative Supervisor

• Revision:

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