05000348/LER-1978-018-03, Diesel Generator IC Failed to Start.Caused by Solenoid Valves Sticking Due to Corrosion Particles.Air Start Solenoid Valves Cleaned & Tested.Design Change Implemented

Diesel Generator IC Failed to Start.Caused by Solenoid Valves Sticking Due to Corrosion Particles.Air Start Solenoid Valves Cleaned & Tested.Design Change Implemented

ML19210D015
Person / Time
Site:	Farley
Issue date:	11/14/1979
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19210D012	List: 05000348/LER-1978-018-03, Diesel Generator IC Failed to Start.Caused by Solenoid Valves Sticking Due to Corrosion Particles.Air Start Solenoid Valves Cleaned & Tested.Design Change Implemented 05000348/LER-1978-037-03, Vacuum Pump Kept Tripping on Low Flow.Cause Not Stated.Vacuum Pump Replaced.Flow Trip Setpoint Not Adjusted.Design Change to Add Second Pump in Parallel Has Been Implemented ML19210D011
References
LER-78-018-03L, LER-78-18-3L, NUDOCS 7911200418
Download: ML19210D015 (3)

LER-1978-018, Diesel Generator IC Failed to Start.Caused by Solenoid Valves Sticking Due to Corrosion Particles.Air Start Solenoid Valves Cleaned & Tested.Design Change Implemented

Event date:
Report date:
3481978018R03 - NRC Website

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[1 W g @enerator IC from starting.

Diesel Generator 1C was satisfactorily tested upon j

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.Lig l moisture in the air start system piping has been implemented.

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ALAPAMA PO'.ER COMPANY JOSEPH M. FARLEY NUCLEAR PLANT ATTACHMENT TO LER 78-018/03L-1 Facility:

Joseph M. Farley Unit 1 Report Date:

11/14/79 Event Date: March 8, 1978 Identification of Event:

Diesel Generator 1C failed to start while performing Surveillance Test Procedure FNP-1-STP-28.1.

Condition Prior to Event

The Unit was in Mode 1, 100% steady state power.

Description of Event

At 0605 on 3/8/78, while performing the Operability Surveillance Test Procedures after tagging out Diesel Generator IB for maintenance, Diesel Generator 1C failed to start. Diesel Generator IB was immediately placed back in service and operability of the remaining A.C. electrical power sources was demonstrated as required by Technical Specification 3.8.1.1.

At 1055 on 3/8/78, Diesel Generator 1C was restored to an operable status.

Designation of Apparent Cause:

Corrosion particles caused the air start solenoid valves to stick, preventing Diesel Generator 1C from starting. Diesel Generator 1C was tatisfactorily tested as per FNP-1-STP-28.1 upon cleaning the air start scienoid valves.

Analysis of Event

Diesel Generator 1C was restored to an operable status within the time limit specified in Technical Specification 3.8.1.1.

All other A.C.

electrical power sources were verified operable.

The health and safety of the public were not affected by this occurrence.

Effect on Plant:

This occurrence had no significant effect on the plant.

Corrective Action

Cleaning the air start solenoid valves was suffici.ent action to clear the immediate problem.

1363 34I

78-018/03L-1 A design change (installation of air dryers and blowdown valves in the air start system for the diesel generators) has been implemented.

Failure Data:

No previous occurrence of this type has been reported.

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