ML20064D809

LER#78-066/03X-1 on 780914:inspec of Diesel Generator Bldg Noted Lb D/G Air Start Sys Air Reservoir 1A,1B Pressures Were 210 PSIG & 80 Psig,Due to 1B Air Compressor Relief Valve/Check Valve Leakage

ML20064D809
Person / Time
Site:	Farley
Issue date:	11/02/1978
From:	Hairston W ALABAMA POWER CO.
To:
Shared Package
ML20064D802	List: ML20064D798 ML20064D805 ML20064D809 ML20064D817 ML20064D824
References
LER-78-066-03X, LER-78-66-3X, NUDOCS 7811090192
Download: ML20064D809 (3)

Text

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A RC F o R M 365 U. S. RUCLEAR REGULATORY COMMISSION D 77)

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DOGNET NUYBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h FOT 1 1 On 9/14/78, during an inspection of the diesel nene rator buildinc. an NRC inspector l

[0l3l l noted that the 1B D/G air start system air reservoir lA, 1B pressures were 210 psig an@

l 0 1.: l l 80 psig. He notified the Shift Foreman, who declared the D/G inoperable. T/S 3.S.1.ll 10 l'> ] l requireu that two separate independent diescl generator sets be operable. The IB D/G l I O 16 l l was inoperable from 1030 to 1230 on 9/14/78. T/S 3.8.1.1 action statenent require- l l 0 l 7 } l ments were met. The other diesel generator set was operable. This occurrence had no l 1018 l I ef fect on the health and safety of the general public. l 8 9 80 7

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31 40 gg 41 l Nlg lA lg lC l4 l7 l0 [g 42 43 44 47 C AUSE DESCRIPTION AND CORRECTIVE ACTIONS l i l O l ] lB air compressor relief valve / check valve leaked causing the 1A and IB air reservoirs l 3 i lto bleed down. The lA air compressor, tagged out for maintenance, was returned to l l,l7; l service and the air reservoirs were repressurized. FNP-1-AP-52 was not properly l

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ALABAMA P0h'ER COMPANY JOSEPH M. FARLEY NUCLEAR PLANT DOCKET NO. 50-348 ATTACHMENT TO LER 78-066/03X-1 Facility: Joseph M. Farley Unit 1 Report Date: (Update Report - Previous Report Date 10/16/73 Event Date: 9/14/78 Identification of Event Air pressure in the 1B diesel generator A and B air start receivers was found to be 210 psig and 80 psig respectively.

Conditions Prior to Event The Unit was in Mode 1 operating at 100% steady state power.

Description of Event At approximately 1015 on 9/14/78, an NRC inspector touring the diesel building observed that the air receivers in the starting air system for the 1B diesel generator were reading 210 psig and 80 psig respectively for the A and B receivers. The problem was independently identified by Maintenance personnel shortly thereafter.

The Shif t Foreman was notifed. He declared the IB diesel generator inoperable at 1030 on 9/14/78, and verified the operability of the remaining A. C. sources. The 1A air compressor, which was previously tagged out for maintenance, was returned to service, and the 1B diesel generator was declared operable at 1230 on 9/14/78.

Designation of Apparent Cause A leaking relief valve and check valve on the 1B air compressor  %

caused the 1A and 1B air receivers to bleed down. The relief valve had been replaced at approximately 0930 on 9/14/78, and was not properly tested prior to returning the 1B air compressor to service.

i The test and restoration requirements of FNP-1-AP-52, Equipment Status Control and Maintenance Authorization, were not implemented properly.

Analysis of Event The 1B diesel generator was restored to an operable status within the time limit specified in Technical Specification 3.8.1.1.

Although the air pressure in the LA and 1B air receivers was 210 psig, and 80 psig respectively, it 'is noted that successful starts on the IB diesel generator were made during the startup test program at air pressures as low as 140 psig. The other separate and independent diesel generator set (1-2A and 1-C diesel generators) was operable.

This occurrence had no affect on the health and safety of the general public.

78-066/03X-1 Effect on Plant This occurrence had no significant effect on plant operation.

Corrective Action The operability of the 1B diesel generator was restored when the 1A air compressor was returned to service and the air pressure in the air receivers was restored to normal. Individuals involved in this incident have been instructed in proper implementation of FI:P-1-AP-52.

Failure Data None.

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