ML20040F498

RO 82-01:on 820117,fire Suppression Water Sys Declared Inoperable.Caused by Inoperability of Fire Diesels Due to Extremely Low Temps.Space Heaters Repaired & Returned to Svc.Fuel Oil Temp Problem Under Investigation

ML20040F498
Person / Time
Site:	Oyster Creek
Issue date:	02/01/1982
From:	Fiedler P GENERAL PUBLIC UTILITIES CORP.
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-82-01, RO-82-1, NUDOCS 8202090269
Download: ML20040F498 (3)

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GPU Nuclear O N Fo ked Rive , New Jersey 08731 609-693-6000 Wnter's Direct Dial Number:

} February 1, 1982

. , \ Ch i Mr. Ronald C. Haynes , Administrator [N '

' ~ %' A/

Region I 6 U.S. Nuclear Regulatory Commission ,

I 631 Park Avenue i .*

-/._ -

King of Prussia, PA 19406 (99{ $

i, .

Dear Mr. Haynes:

' ~ P(( p l

Subject:

Oyster Creek Nuclear Generating Station Docket No. 50-219 4 Id_ii '

/

Special Report No. 82-1 This letter forwards three copies of a special report in accordance with Section 3.12.B.3.b. (3) of the Oys ter Creek Technical Specifications.

This report is a follow-up to the telephone notification of January 18, 1982.

If you should have any questions, please contact Mr. Michael Laggart at (609) 693-6932.

l Very truly yours, I

i (b'U(#0 (

eter B. Fiedler

[Vice-President & Direr 6//

7 Oyster Creek j

l JTC:GWB:lse attachment cc: Director Office of Inspection and Enforcement (0T tD U.S. Nuclear Regulatory Commission

, E$ Washington, D.C. 20555 i Mt i Do t24 Director 80 Office of Management Information and

%$ Program Control O ' U.S. Nuclear Regulatory Commission 8O oo, Washington , D. C. 20555 oni yo NRC Resident Inspector 23 4 Oyster Creek Nuclear Generating Station Forked River, NJ 08731 {

l GPU Nuclear is a part of the General Pubhc Utihties System gf,.

OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Special Report No. 82-1 Report Inte Fbbruary 1, 1982' Occurrence Date January 17, 1982 Telephone Report Date January 18, 1982 Initial Report Date January 18, 1982 Time of Occurrence 1940 Hours Identification of Occurrence Fire ~ suppression water system inoperable.

This event-is considered to be reportable as defined in the Technical S pecifications , paragraph 3 12. B.3.b. (3 ) .

. Conditions Prior to Occurrence Routine Shutdown Operation Power: 0 - MWt 0 MWe Flow: Recirculation 5 x 104 gpm Feed: O lbs/hr.

Description of Occurrence On Sunday, January 17, 1982, the fire suppression water system at Oyster Creek was declared inoperable. 1-2 fire diesel had started for no apparent reason and in the process overheated and was shutdown for mainte. nance. An operability test was performed on 1-1 fire diesel to assure its availability. 1-1 fire diesel was subsequently declared inoperable in light of the fact that it could not maintain proper engine speed and discharge pressure. A check of the electrically operated redundant fire suppression water system revealed it too was inoperable due to freezing of various instrumentation lines.

Special Report No. 82-1 Page 2 Apparent Cause of Occurrence Extremely low ambient temperature.

The cause of failure of the diesel fire pumps is attributed to extremely low ambient temperatures. The low temperatures caused frozen cooling water lines, one of which broke. In addition, the fuel oil cooled below the cloud point which caused partial clogging of the fuel filters. Initiation of the 1-2 fire diesel pump was caused by a frozen pressure sensing line. The low temperatures in the Fire Pump House were the result of the malfunction of two of four installed space heaters. The cause of failure of the electrically operated redundant fire protection system was loss of pressure control due to frozen sensing lines.

Corrective Action The space heaters were repaired and returned to service. The cooling water line to 1-2 Diesel Fire Pump was repaired and operability tests on both diesels were performed. Both diesel fire pumps were declared operable at 1310 hours0.0152 days <br />0.364 hours <br />0.00217 weeks <br />4.98455e-4 months <br /> on January 18, 1982. The redundant fire protection system instrumentation lines were heat traced and lagging was installed. The redundant fire protection system was returned to service January 20, 1982.

With respect to the fuel oil temperature problem, an evaluation is being conducted to determine (1) the advisability of providing a fuel oil low temperature alarm in the control room, and/or (2) providing a method of preheating the diesel fuel oil with thermal blend type heaters on the supply line. Corrective action, if necessary, will be taken pending the results of this evaluation.

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