ML20151R442

Ro:On 850920,Halon Sys Rendered Inoperable in Excess of 14-day Tech Specs Limit.Caused by Closure of Control Bldg Dampers Following Transformer Chart & Actuation of Deluge Sys.Fusible Links Replaced & Dampers Restored on 851030

ML20151R442
Person / Time
Site:	Indian Point
Issue date:	11/01/1985
From:	Selman T CONSOLIDATED EDISON CO. OF NEW YORK, INC.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8602060072
Download: ML20151R442 (2)

Text

q -

. . - _ , . , . . . Morrey sesman W:s Prssdent ,, ' g l Consohdated Edison Company of New York, Inc.

Indian Point Station Broadway & Bleakley Ave.

Buchanan, NY 10511 Telephone (914) 737-8116 Noverber 1,1985 Re: Indian Point Unit No. 2 Docket No. 50-247 Dr. Thcmas E. Murley Regional Administrator U.S. Nuclear Regulatory Ccumission Region I 631 Park Avenue King of Prussia, PA 19406

Subject:

30-Day Report, Inoperable Halon Systen

Dear Dr. W rley:

Technical Specificaticsn 3.13F.2.b requires that a 30-day report be subnitted if the Halon System is inoperable for greater than 14 days. his report is to provide the cause of inoperability and schedule for work cmpletion.

On Septernber 20, 1985, a short in Main Transformer nunber 21 actuated the deluge system in the area and also closed the danpers in the Control Building, including those in the Cable Spreading Rocxn. Subsequently, these danpers were opened for ventilation rendering the Halon Systen inoperable.

%e appropriate empensatory action, establishment of a continuous fire watch, was inmediately implemented. Se danpers could not be restored to operable status within 14 days,_ simultaneous with other station activities which precluded replacement of the fusible links, a prerequisite to Halon System operability.

- The danpers were restored to operable status on October 30, 1985. The cause of inoperability was actuation of the danpers by the September 20, 1985 event and the subsequent opening of these dampers without replacement

.of the fusible link.

- Very truly yours, 8602060072 851101 PDR ADOCK 05000247 S PDR l mrr Sew I

l JRE/ljs cc: Resident Inspector I

'b ,c u '

L_

~

I 4

• cc: Senior Resident Inspector U.S. Nuclear Regulatory Comission P.O. Box 38 Buchanan, NY 10511

.