ML19338C663

Nonroutine Environ Operating Rept 50-219/80-4:on 800727-29, Dilution Pump 1-1 Tripped & Could Not Be Restarted within 15 Minutes.Caused by High Lubricating Oil Temp Due to Low Cooling Water Pressure.Sys Mods Proposed

ML19338C663
Person / Time
Site:	Oyster Creek
Issue date:	08/07/1980
From:	Ross D JERSEY CENTRAL POWER & LIGHT CO.
To:
References
NUDOCS 8008180380
Download: ML19338C663 (3)

Text

.

• , n. 37 Jersey Central Power & Light Company

. Madison Avenue at Punch Bowl Road

/4f. Mornstown, New Jersey 07960 ,

(201)455-8200 l l

August 7, 1980 Mr. Boyce H. Grier, Di rector Of fice of Inspec. tion and En forcement Region 1 -

United States i ear Regulatory Cormiission 631 Park Avenue King of Prussia, Pennsylvania 19406 Dea r M r . Grier:

SUBJECT:

Dyster Creek Nuclear Generating Station Docket No. 50-219 Non routine Envi ronmental Ope rating Report No. 50-219/80-4 This letter forwards two copies of Nonroutine Environmental Operating Report No. 50-219/80-4 in compliance wi th paragraph 5.6.2 of Appendix B to the Technical Speci fications.

Very truly yours,

/

g ,

Donald A. Ross, Manage Generating Stations-Nuclear ck Enclosures cc: Di rector (17 copies)

Office of Nuclear Reactor Regulations Uni ted States Nuclear Regulatory Commission Washington, D. C. 20555 c/o Distribution Services Branch, DDC, ADM O

s ,4 1

8008180 8 0 3

i On AI.e 1 10il.0 h

, Jersey Central Power & Light Company

, Madiscn Avenue at Punch BoM Road Mornstown, New Jersey 07960 (201)455-82 @

OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Nonroutine Envi ronmental Operating Report No. 50-219/80-4 Report Date August 7, 1980 Occurrence Date July 27, 28, c 29,1980 Identi fication of Occurrence Exceeding a limi ting condi tion as defined in the Envi ronmental Technical Speci-fication, Paragraph 2.1.4.3, when on three successive days, seven individual instances occurred where dilution pump l-1 tripped and could not be restarted within the required limi t of 15 minutes. During each occurrence, the U. S.

Route #9 discharge bridge temperature exceeded 87.0"F. These events were immedia tely identi fied at the time of non-compliance.

This event is considered to be a non-routine envi ronmental operating report as de fined in the Technical Speci fications, Appendix "B", paragraph 5.6.2.

Conditions Prior to Occurrence The reactor was operating at steady state power.

Dilution Pump Flow: 5.20 E 5 GPM Circulating Water Pump Flow: 4.60 E 5 GPM i

Description of Occurrence 1

j During the sequence of events, dilution pump 1-2 was tagged out of service due l

to motor winding failure. Seven dilution trips occurred on July 27, July 28, and July 29, 1980. All seven pump trips were caused by high lubricating oil temperature which was caused by low cooling water pressure. The lubricating oil temperature would increase to the system trip point and trip the pump. This condi tion was aggravated by high ambient water and ai r temperatures.

The accompanying table lists the dates and the times of the pump trips, the total time the pump was of f, and the time of non-complying discharge.

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Nonroutine Envi ront ntal Page 2 Operating Repor b. 50-219/80-4 August 7, 1980 Time Time Total Time Time of Date Off On Off Non-Compliance July 27, 1980 1952 2042 50 minutes 35 minutes July 27, 1980 2334 July 28, 1980 0001 27 minutes 12 minutes July 28, 1980 0922 1940 618 minutes 603 minutes July 28, 1980 2047 2114 27 minutes 12 minutes July 29,1980 1407 1432 25 minutes 10 minutes July 29, 1980 2102 2129 27 minutes 12 minutes July 29, 1980 2315 2354 39 minutes 24 m' otes Apparent Cause of Occurrence The cause of this occurrence is attributed to component failure due to a lubri-cating oil cooling system that .eas inadequate for the t iusual service conditions that existed at the time.

Analysis of Occurrence

! The operation of two dilution pumps is required when the U. S. Route 9 discharge bridge temperature exceeds 87 0*F. Operation of the dilution pumps in the pre-scribed manner will minimize adverse effects on most species of fish, in each case of dilution pump 1-1 tripping out of service for a period greater than 15 minutes, no harmful marine biological ef fects were expected or observed.

Corrective Action The plant operations staff increased surveillance on the dilution plant during this period. When dilution pump 1-1 tripped, greater than 15 minutes was needed to allow the lubricating oil to cool sufficiently to restart the pump.

Dilution pump 1-2 has been returned on site and the motor was mounted on i ts pedestal on July 30, 1980. Subsequent to pump startup tests, this pump will be held as a reserve pump.

l An engineering evaluation has been completed for the purpose of upgrading the dilution pump sealing water, cooling water systems.

Until modi fications can be made, the internals of the cooling water solenoid valves have been removed to increase flow of cooling water to the lube oil heat I exchange rs .

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