ML19344E633

RO 50-219/80-5:on 800808,09,11 & 12,during Steady State power,10 Dilution Pump Trips Occurred,Exceeding Limiting Condition Per Tech Spec.Caused by High Lubricating Oil Temp Due to Low Cooling Water Pressure

ML19344E633
Person / Time
Site:	Oyster Creek
Issue date:	08/26/1980
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
Shared Package
ML19344E627	List: ML19344E626 ML19344E633
References
NUDOCS 8009020385
Download: ML19344E633 (2)

Text

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[' s, Jersey Central Power & Ught Company k g- (f (') j Madison Avenue at Punch Bowi Road Mornstown New Jersey 07960 (201)455-8200 OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Nonroutine Environmental Operating Report No. 50-219/80-5 Report Date Augus t 26, 1980 Occurrence Dates Augus t 8, 9, 11, 12, 1980 Identification of Occurrence Exceeding a limiting condition as defined in the Environmental Technical Speci-fication, Paragraph 2.1.4.3, when over a span of five days, ten individual instances occurred where a dilution pump tripped and could not be restarted within the required limit of 15 minutes. During each occurrence, discharge water temperature exceeded 87.0*F at the U.S. Route #9 bridge. These events were immediately identified at the time of non-compliance.

This event is considered to be a non-routine environmental operating report as defined in the Technical Specifications, Appendix "B", paragraph 5.6.2.

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

Dilution Pump Flow  : 5.20 E 5 GPM Circulating Water Pump Flow: 4.60 E 5 GPM Descriotion of Occurrence l A total of ten dilution pump trips occurred between August 8,1980 and August 12, I 1980. All trips wem caused by high lubricating oil temperature which was in turn caused by low cooling water pmssure. The lubricating oil temperature would increase to the system trip point and trip the pump. This condition was aggravated by high ambient water temperature and air temperatures.

The accompanying tables list the dates and the times of the pump trips, the total time the pump was off, and the time of non-complying discharge:

80090203 5 5-Jersey Central Power & L:gnt Company is a Memter of the General Pubhc Utihtres System

1 Non-Routine Environmental Operating Report Page 2 No. 50-219/80-5 August 26, 1980

~ DILUTION PUMP TRIPS Total Time Of-Time Off Time On Time Off Non-Compliance-Date (Pump #) (Pump #) (Minutes) (Minutes)

August 8, 1980 1105 (1-1) 1308 (1-1) 123 108

- August 8 -1980 1408 (1-1) 1508(1-2) 60 45

- August ' 8,1980 1522 (1-2) 1715 1-3 113 98 4 August 9, 1980 0811 (1-1) 0835 1-1 24 9

. August 9, 1980 1501 1-1 ) 1536 1-1 35 20 August - 9,1980 - 1744 1-1 ) 1815 1-1) 31 16 August 9,1980 1851 1-1). 1914 1-1) 23 8 August 9, 1980 1958 (1-1) 2025 (1-1) 27 12 August 11, 1980 1309 (1-1) 1339 (1-1) 30 15 August 12, 1980 1409 (1-1) 1446 (1-1) 37 22 Apparent Cause of Occurrence The cause of this occurrence is attributed to component failure due to a lubri-cating oil cooling system that was inadequate for the unusual service conditions that existed at the time.

~When dilution pumps tripped due to high lubricating oil temperature, they had to nemain out of service until the oil cooled sufficiently to allow for restart.

Analysis of Occurrence The operation of two dilution pumps is required when the discharge water temp-erature exceeds 87.0 F 'at the U.S. Route #9 bridge. Operation of the dilution pumps in the orescribed manner will minimize adverse effects on most species of fi s h. In each case of a dilution pump tripping out of service for a period .

greater than 15 minutes, no harmful marine biological effects were observed. i 1

Corrective Action The plant operations staff increased surveillance on the dilution plant during l this period. In each case when the lubricating oil had cooled sufficiently, the i pump in question was restarted.

-An engineering evaluation has been completed for the purpose of upgrading the dilution pump sealing water and cooling water systems. Until modifications can 1 be made, the internals of the cooling water solenoid valves have been removed to  !

increase the flow of cooling water to the lube oil heat exchangers. '

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