05000296/LER-1979-014-03, /03L-0:on 790831,five MSIVs Exceeded Tech Spec Leakage Limits.Caused by Age & Use of Seating Surfaces.Valve Seating Surfaces Will Be Repaired & MSIVs Retested to Meet Tech Specs

/03L-0:on 790831,five MSIVs Exceeded Tech Spec Leakage Limits.Caused by Age & Use of Seating Surfaces.Valve Seating Surfaces Will Be Repaired & MSIVs Retested to Meet Tech Specs

ML18024B042
Person / Time
Site:	Browns Ferry
Issue date:	09/27/1979
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18024B041	List: 05000296/LER-1979-014, Forwards LER 79-014/03L-0 05000296/LER-1979-014-03, /03L-0:on 790831,five MSIVs Exceeded Tech Spec Leakage Limits.Caused by Age & Use of Seating Surfaces.Valve Seating Surfaces Will Be Repaired & MSIVs Retested to Meet Tech Specs
References
LER-79-014-03L, LER-79-14-3L, NUDOCS 7910020360
Download: ML18024B042 (4)

LER-1979-014, /03L-0:on 790831,five MSIVs Exceeded Tech Spec Leakage Limits.Caused by Age & Use of Seating Surfaces.Valve Seating Surfaces Will Be Repaired & MSIVs Retested to Meet Tech Specs

Event date:
Report date:
2961979014R03 - NRC Website

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7914 Technical Specification Involved 4 7.2 i Reported Under Technical Specification T.

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6. 7. 2.b.4 Date of Occurrence 8/31/79 Time of Occurrence 8:00 p m Unit Identification and Descri tion'of Occurrence:

MSs 1-14, 1-15, 1-26, 1-27, and 1-51 exceeded Technical Specification 4.7.A.2.i limit of 11.5 SCFH for each valve.

FCV-1-14 was 1215. 6389

SCFH, FCV-1-15 was 433. 9335

SCFH, FCV-1-26 was tested with FCV-1-27 for a total of 1715.7145

SCFH, and FCV-1-51 was 3184. 0302 SCFH.

Conditions Prior to Occurrence:

I Unit in cold shutdown for refueling outage.

Action specified in the Technical Specific: ticn Surveillance Requirements met due to ino erable e ui ment.

Describe.

Hot applicable.

- A arent Cause of Occurrence:

Age and use of valve seating surface.

PORC is investigating this in further detail.

Analysis of Occurrence:

There was no damage to plant equipment, no activity released, no personnel m~osure, no danger to the health or-safety of the public.

Corrective Action

Rework and retest MSs to meet technical specifications prior to return to power.

I:aiIure Data:

I Previous occurrence BFRO-50-296/7825, 259/7834, 259/7723, 259/7903, 260/7913, 260/797, 260/789.

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