ML20006F386

Ro:On 900103,common Plant Standby Gas Treatment Sys Train a Fire Protection Deluge Sys Declared Inoperable for More than 14 Days.Caused by Replacement of Filter W/Threaded Pipe Plug.Fire Watch Patrol Established & Nozzle Replaced

ML20006F386
Person / Time
Site:	Peach Bottom
Issue date:	02/16/1990
From:	Danni Smith PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9002270460
Download: ML20006F386 (2)

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- PHILADELPHIA ELECTRIC COMPANY : -

• h PEACll BUTIUM KIUMIC POWER STATION ..

R. D.1, Box 20H '

/0rin Delta,Itnnsyhinia 17314 nu:n mornas-nu na rm or exctHFNCE , (717) 456-7014 ,

D. M. Smith -

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L Ykc President February 16, 1990 Docket Nos. 50-277 50-278 License Nos. DPR DPR-56 U..S. Nuclear Regulatory Commission ATTN: Document Control Desk-Washington -DC 20555

SUBJECT:

Peach Bottom Atomic Power Station, Units 2 and 3 REPORTABLE OCCURRENCE - Standby Gas Treatment Charcoal Filter Fire Suppression System,0ut Of Service For Greater.Than 14 Days ,

REFERENCE:

Peach Bottom Units 2 and 3 i Technical Specifications 3.14.A.8.b This special report, involving the inoperability of a spray nozzle in the Standby Gas Treatment charcoal filter fire suppression system, is being submitted pursuant to the referenced Technical Specification.

. Ids g fication of Occurrence l

On January 3, 1990, with Unit 2 operating at 100% power and Unit 3 at 65%

L ' power the common plant Standby Gas Treatment System (SBGT) "A" train fire

-protection deluge system was declared inoperable. During performance of a surveillance test one of thirty-six deluge system spray nozzles protecting the 1

~SBGT:"A" train charcoal filter wa3 discovered to have been replaced with a v -threaded pipe plug. The deluge system was not restored to an operable-status L until January 22, 1990. This condition is reportable pursuant to the L -referenced Technical Specification.

Cause of Occurrence

! The. nozzle was not plugged at the time of the previous system air flow

test and' visual inspection, performed July 6, 1988 in accordance with 1 Technical. Specification 4.14.A.7.b and c. A review of maintenance records did not identify any work activities associated with these nozzles after that Ltime. Time necessary for procurement of a replacement nozzle resulted in x

exceeding the referenced Technical Specification 14 aay restoration period.

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,7 Actions Taken A fire watch patrol was immediately established to inspect the affected area at least once

per shift. On January 22, 1990, the nozzle was replaced and the system returned to service.- Periodic surveillance tests of other fire suppression systems have not revealed any other plugged nozzles.

Sincerely r

cc: R. A. Burricelli, Public Service Electric & Gas T. M. Gerusky, Commonwealth of Pennsylvania J. J. Lyash, USNRC Senior Resident inspector

'T. E. Magette, State of Maryland W. T. Russell, Administrator, Region 1. USNRC H. C. Schwemm Atlantic Electric J. Urban. Delmarva Power f.

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