05000296/LER-1978-032-03, /03L-0 on 781124:during Master Refuel Test Instruction,Rcic Tripped on Overspeed & Was Inoperable. Electro-Governor-Regulator,Electro-Governor-Mechanism & Ramp Generator Were Replaced & RCIC Proved Operable

/03L-0 on 781124:during Master Refuel Test Instruction,Rcic Tripped on Overspeed & Was Inoperable. Electro-Governor-Regulator,Electro-Governor-Mechanism & Ramp Generator Were Replaced & RCIC Proved Operable

ML18024A607
Person / Time
Site:	Browns Ferry
Issue date:	12/22/1978
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18024A603	List: 05000296/LER-1978-032, Forwards LER 78-032/03L-0 05000296/LER-1978-032-03, /03L-0 on 781124:during Master Refuel Test Instruction,Rcic Tripped on Overspeed & Was Inoperable. Electro-Governor-Regulator,Electro-Governor-Mechanism & Ramp Generator Were Replaced & RCIC Proved Operable
References
LER-78-032-03L-01, LER-78-32-3L-1, NUDOCS 7901020123
Download: ML18024A607 (3)

LER-1978-032, /03L-0 on 781124:during Master Refuel Test Instruction,Rcic Tripped on Overspeed & Was Inoperable. Electro-Governor-Regulator,Electro-Governor-Mechanism & Ramp Generator Were Replaced & RCIC Proved Operable

Event date:
Report date:
2961978032R03 - NRC Website

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4 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES QIO During the performance of Master Refuel Test Instruction (which requires.SI 4.5.F.1.C"4

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~the RCIC tripped on overspeed and was inoperable.

The HPCI was proven operable per SI 4.5.E.l.b.

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Re ulator (EGR) and was replaced.

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Oil was observed leakin from the Elect v

During replacement additional problems arose with the Electro-Governor-Mechanism (EGM) and the ramp generator which also were replaced and calibrated.

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Form BF-17 BF 15.2 6/09/78 LER SUPPLEi>IENTAL INFORNATION BFRO 296 /

7832 Technical Specification Involved 3.5.P Reported Under Technical Specification

6. 7.2.b. 2 Date of Occurrence ll/24/78 Time of Occurrence 1400 Unit 3

Identification and Descri tion of Occurrence:

RCZC speed controls failed during performance of flow test.

Conditions Prior to Occurrence:

Unit startup steady state 5% ANT.

Action specified in 'the Technical Specification Surveillance Requirements met due to ino erable e uioment.

Describe.

HPCI was proven operable.

A arent Cause of Occurrence:

.Component failure in turbine speed controller.

Anal sis of Occurrence:

Apparent cause of failure was a hydraulic seal failure.

Corrective Action

Replaced component Failure Data:

None Tennessee Valley Authority - Browne Ferry Nuclear Plant