ML20063K853

Special Rept 94-01:on 931230,two Thermal Fire Detectors in Fire Zone 277 Removed from Svc.Detectors Removed to Facilitate Removal & Repair of ERCW Pump M-B.Roving Fire Watch Established.Detectors Returned to Svc on 940123

ML20063K853
Person / Time
Site:	Sequoyah
Issue date:	02/14/1994
From:	Fenech R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
94-01, 94-1, NUDOCS 9403030021
Download: ML20063K853 (4)

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A un,c. -. % Aow% , y c a e .mo m oay it. , - .e 3m9m Robert A Fereen n o n e < ,3, s g w w : m, February 14, 1994 U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 SEQUOYAH NUCLEAR PLANT (SQN) - UNITS 1 AND 2 - FACILITY OPERATING LICENSES DPR-77 AND DPR SPECIAL REPORT 94-01 The enclosed special report provides details concerning the inoperability of fire detection instrumerts in Fire Zone 277 over Essential Raw Cooling Water (ERCW) Pump Motor M-B. The detectors were inoperable for a period greater than the technical specification (TS) allowable timeframe.

Details concerning the inoperability of a fire suppression water system supplying two fire hose stations in the turbine building are also provided. This report is being submitted in accordance with TS Action Statements 3.3.3.8(b) for the detection instruments and 3.7.11.4(a) for the hose stations.

If you have any questions concerning this submittal, please telephone C. H. Whittemore at (615) 843-7210.

Sincerely, Y/

Robert A. Fenech >

Enclosure cc: See page 2 230040 9403030021 940214 '

PDR ADDCK 05000327 6 -

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U.S. Nuclear Regulatory Commission Page 2 February 14, 1994  :

i cc (Enclosure): f Mr. D. E. LaBarge, Project Manager l U.S. Nuclear Regulatory Commission One White Flint, North l 11555 Rockville Pike Rockville, Maryland 20852-2739 ,

NRC Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road ,

Soddy-Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 ,

Atlanta, Georgia 30323-2711  ;

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a b ENCLOSURE }

SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 SPECIAL_ REPORT 94-01 ,

s I. FIRE DETECTORS IN ZONE 277 -

Description _nLCondition l On December 30, 1993, with Unit 1 in Mode 5 coming out of a i refueling outage and Unit 2 in Mode 1, two thermal fire detectors' in Fire Zone 277 were removed from service. The detectors are located in the essential raw cooling water (ERCW) pumping station over ERCW l Pump M-B. The detectors were nonfunctional for a-period of time that exceeded the technical specification (TS) allowable timeframe.

Cause_nf_Conditico The fire detection instrumentation was removed f rom service to facilitate the removal and repair of ERCW Pump M-B. The planned maintenance activity exceeded the TS allowable timeframe of 14 days.

Comerlive Antion l In accordance with Limiting Condition for Operation (LCO) 3.3.3.8 {

Action Statement (a), a roving fire watch was established and j maintained for the duration of the maintenance activity. The )

detectors were returned to service on January 23, 1994, at 1535  ;

Eastern standard time.

i II. FIRE HOSE SIATIONS 1-26-617 AND 618 INOPERABLE Description _ni_ Condition  ;

On January 4, 1994, with Unit 1 coming out of a refueling outage, _

two fire hose stations (1-26-617 and -618) in the turbine building  ;

on Elevation 685.0 were taken out of service. The high pressure i fire protection (HPFP) hose stations were taken out of service [

because the four-inch HPFP header supplying the two fire hose j stations was leaking and in need of repair. j

-t Cause._DLCondilion j l

The time necessary to effect the repair and replacement of the HPFP' header exceeded the TS allowable timeframe.

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. t In accordance with LC0 3.7.11.4, temporary fire hoses were provided- l as compensatory measures until the-hose stations are returned to ,

service. Also, a roving fire watch was established and will be i maintained until the fire hose stations are returned to service. l 1

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