ML20210L659

Ro:On 860328,diesel Fire Pump Tripped & Would Not Restart During Repair of 860327 Fire Pump Leak.Fire Watches Established.Temporary Bypass Installed.Work Deferred on 860410 & Will Resume Late Apr

ML20210L659
Person / Time
Site:	Indian Point
Issue date:	04/11/1986
From:	Selman M CONSOLIDATED EDISON CO. OF NEW YORK, INC.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8605020016
Download: ML20210L659 (2)

Text

, . . c . _ _ - . - . - - . - .-

L Murray %

• h Vr.e Pres %

Consolidated Edison Cornpany of New York, Inc.

indian Point Station j ~ Sroadway & Bleakley Awe.

i

'Uuchanan NY 10511 Telephone (914) 737-8116 April 11, 1986 t

Re: Indian Point Unit Nos 1 & 2 f Docket No. 50-247 i

l l

l Dr. Thomas E. Murley l Regional Administrator U.S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406

SUBJECT:

Inoperable High Pressure Water Fire Protection System

Dear Dr. Murley:

Technical Specification 3.13A.3.b. (ii) requires a Special Report within fourteen (14) days if the high pressure water fire protection system i beccmes inoperable. On March 28, 1986, the diesel fire pump and two electric fire pumps were out of service, rendering the high pressure water fire protection system inoperable.

On March 11, 1986 electric fire pump No. 11 and two associated pressure maintenance pumps were taken out of service in conjunction with. scheduled work to replace pipe sections of the 10" fire protection loop located in the Unit No. 1 Turbine Building. (See Con Edison, M. Selman to T. Murley, April 7, 1986.) Electric fire pump No. 12 was used to maintain pressure in the remainder of the fire water system. On March 27, 1986 a leak developed in No. 12 pump seal which required taking the pump out of service for repair. The diesel fire pump was then used . to maintain the fire water system pressure.

On March 28, 1986, at 1:45 p.m., the diesel fire pump tripped and could not be restarted. Work was initiated immediately to determine the cause of 'the trip. Concurrently, the local fire department was notified, all' hot work (cutting, welding, burning and open flames) was suspended and three (3) roving fire watches were established. At approximately 6:15 p.m. a loose wire on the diesel fire pump engine governor was discovered and reconnect-ed. The diesel successfully started and a post maintenance test was initiated. The . diesel fire pump and the No. 12 pump were returned to service at 8:00 p.m. (See Con Edison, M. Selman to T. Murley, March 31, 1986.)

To support additional maintenance on No. 12 pump, which began April 2, and reduce service requirements for the diesel fire pump a temporary bypssa connection between the high pressure water fire protection system and the j l pressure maintenance pumps was installed. This permitted the maintenance '

pumps to be utilized to maintain pressure in the system. No. 12 pump will-return to service April 12.

l 8605020016 860411 P

! PDR ADOCK 05000247 3 i S PDR ~ ,

p;

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, . 1 ,, ~ .

s-f On April 10, 1986 it was necessary to temporarily defer _ completion of the maintenance started on March 11.' . The temporary bypass was removed and the No.11 fire pump and the pressure maintenance pumps were retunad to normal .

service. The maintenance will~ resume in late April' with approximately - 35

. days of work remaining.

If you have any questions, please contact us.

Sincerely yours,- j

+h Murray Selman

. Vice President Nuclear Power 17.190.4.8.1 cc: Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 38 Buchanan, NY 10511 'l 4

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