ML20133C465

Special Rept:On 850722,fire Detection Sys & Halon Automatic Suppression for Battery Rooms 1 & 2 Taken Out of Svc to Facilitate Const of New Battery Room Roof.Detection & Halon Sys Should Be Operable by 850913

ML20133C465
Person / Time
Site:	Yankee Rowe
Issue date:	09/04/1985
From:	St Laurent N YANKEE ATOMIC ELECTRIC CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8510070370
Download: ML20133C465 (2)

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. YANKEE ATGMIC ELECTRIC COMPANY reiconone rar3> s2s.srer

' Star Route, Rowe, Massachusetts 01367

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-.- y September 4,1985 U.S. Nuclear Regulatory Commission Office of Inspection and L,iforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention: Dr. Thomas E. Murley, Regional Administrator

Subject:

3pecial Report - Nos. 1 & 2 Battery Room Fire Detection and Suppression Systems Out of Service Greater Than 14 Days

Dear Sir:

In accordance with Technical Specifications Sections 3.3.3.4 and 3.7.10.5, the attached Special Report is bereby subir.itted.

Very truly yours, t%

Normand N. St. Laurent Plant Superintendent ELM /nm Enclosure l

cc: [3] NSARC Chairman (YAEC)

[1] Institute of Nuclear Power Operations (INPO) 8510070370 DR 850904 g ADOCK 05000029 PDR l

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1 FACILITY NAME: Yankee Nuclear Power Station - Rowe, Massachusetts DOCKET NUMBER: 50-29 OPERATING MODE: I POWER LEVEL: 100%

CAUSE AND ACTIONS TAKEN On July 22, 1985, at 1325 hours0.0153 days <br />0.368 hours <br />0.00219 weeks <br />5.041625e-4 months <br />, the fire detection system and halon automatic suppression for Nos. 1 & 2 Battery Rooms were taken out of service to facilitate the construction of a new Battery Room roof per EDCR 84-317. An hourly fire watch patrol of the area with backup suppression equipment has been in effect throughout the system's outage as required by the affected T.S. Sections 3.3.3.4 and 3.7.10.5.

This EDCR was written in response to the NRC's Systematic Evaluation Program (SEP) Topic III-6, " Seismic Design Considerations," which requires that " Structures, Systems, and Components important to safety be designed to withstand the effects of severe natural phenomena such as earthquakes" and IE Bulletin No. 80-11, " Masonry Wall Design,"

which requires a re-evaluation of masonry walls whose failure could effect a safety related system.

RESTORATION DESCRIPTION The removal of the halon system from service, the removal of associated conduit and cable, the reinstallation of conduit and cable, and the return to service of the halon system is being accomplished under Procedure No. OP-5000.176, " Rerouting of Utilities as Required by EDCR 84-317." This one-time procedure references OP-4666,

" Functional Test of the Fire Suppression and Detection Systems" for post installation testing of the reconnected detection and associated halon release circuitry.

Reinstallation of the detection and halon system release conduit and cable is scheduled to begin 8/27/85. The systems should be returned to operable status by September 13, 1985.