ML19261B625

LER 78-066/03X-2 on 780914:diesel Generator Air Start Sys Air Reservoirs 1A & 1B Pressures Were 210 Psig & 80 Psig. Caused by Leaking of 1B Air Compressor Relief Valve/Check Valve

ML19261B625
Person / Time
Site:	Farley
Issue date:	02/22/1979
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19261B612	List: ML19261B611 ML19261B621 ML19261B625 ML19261B630
References
LER-78-066-03X, LER-78-66-3X, NUDOCS 7902280298
Download: ML19261B625 (3)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION Update Repon LICENSEE EVENT REPORT Previous Report Date 11/02/78 CONTROL BLOCC l s 8 l l l l l]h 6 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 7 0 1 8 9 l Al Ll Jl Ml Fl 1l@l 0] 0l -l 0lLICENSE LICENSEE CODE 14 15 0l 0lNUMBER0l 0l -l 0l 0l@l 25 26 4l 1l 1l 1[ 1[@{57 CA T $8l@

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l o l 2 ] lOn 9/14/78, during an inspection of the diesel generator building, an NRC inspector l l o l a I inoted that the IB D/G air start system air reservoir IA, IB pressures were 210 psig l o 4 and 80 psig. He notified the Shift Foreman, who declared the D/G inoperable. T/S l loIsl13 8.1.1 requires that two separate independent diesel generator sets be operable. Thel o 6 llB D/G was inoperable from 1030 to 1230 on 9/14/78. T/S 3.8.1.1 action statement re- [

o 7 quirements were inet. The other diesel generator set was operable. This occurrence l O s had no ef fect 'on the health and safety of the general public. l 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COYPONENT CODE SUBCODE SU8 CODE O 9 l E lE lh [ Alh l B lh l V l A l L l V l E l X lh [XJh [B,j h 18 19 20 7 8 9 10 11 17 13 .

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3/ 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 o llB air compressor relief valve / check valve leaked causing the lA and IB air reservoirsI i i Ito hiced down. The 1A air compressor, taped out for maintenance, was returned to I i 7 l service and the air reservoirs were repressurized. FNP-1-AP-52 was not proper 1v l.

i 3 l implemented. The individuals involved were instructed in the proper implementation o(j l

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9 ALABAMA POWER COMPANY JOSEPH M. FARLEY NUCLEAR PLANT DOCKET No. 50-348 ATTACHMENT TO LER 78-066/03X-2 Facility: Joseph M. Farley Unit 1 Report Date: (Update Report - Previous Report Date 10/16/78)

Event Date: 9/14/78 Identification of Event Air pressure in the IB 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 IB 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 Shift Foreman was notified. 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 IB diesel generator was declared operable at 1230 on 9/14/78.

Designation of Apparent Cause A leaking relief valve and check valve on the IB air compressor caused the 1A and IB 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 IB air compressor to service.

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

Analy_ sis of Event The IB 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 1A and IB 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 prescures 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 safet.y of the general public.

78-066/03X-2 Effect on Plant This occurrence had no significant effect on plant operation.

Corrective Action The operability of the IB 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 implementaton of FNP-1-AP-52.

Failure Data None