ML20064E706

RO 82-4:on 821116,dilution Pump 1-3 Tripped Off Leaving Only Pump 1-2 in Operation.Caused by Low Seal Water Pressure Due to Debris Clogging Seal Water Strainer.Debris Cleared from Strainer.Pump Refurbishment Program Planned

ML20064E706
Person / Time
Site:	Oyster Creek
Issue date:	12/21/1982
From:	GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20064E696	List: ML20064E692 ML20064E706 ML20064E715 ML20064E722 ML20064E727
References
RO-82-4, NUDOCS 8301060100
Download: ML20064E706 (2)

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OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Nonroutine Environmental Operating Report No. 50-219/82-4

, Report Data pcurrence Date November 16, 1982 Identification of Occurrence Exceeding a limiting condition as defined in the Environmental Technical Specifications, paragraph 2.1.4.3, when an insufficient number of dilution pumps were in operation as specified in paragraph 2.1.4.2. Less than two dilution pumps were operating for greater than 15 minutes, and ambient water temperature was less than 60 F.

This event is considered to be a Nonroutine Environmental Operating Report as defined in the Technical Specifications, Appendix "B", paragraph 5.6.2.

Conditions Prior to Occurrence Dilution Pump Flow - 5.20 E5 GPM Circulating Water Pump Flow - 4.60 E5 GPM Dilution pump 1-1 out of service for maintenance.

Prior to the occurrence, the ambient water temperature in the intake canal was 47.50F. The condenser diceharge water temperature was 58.30F, and the U.S.

Route 9 discharge bridge temperature was 49.80F.

Description of Occurrence At 0336 hours0.00389 days <br />0.0933 hours <br />5.555556e-4 weeks <br />1.27848e-4 months <br /> on November 16, 1982, dilution pump 1-3 tripped off, leaving only dilution pump 1-2 in operation. At 0357 hours0.00413 days <br />0.0992 hours <br />5.902778e-4 weeks <br />1.358385e-4 months <br />, dilution pump 1-3 was returned to service.

Apparent Cause of Occurrence Dilution pump 1-3 tripped due to low seal water pressure as a result of debris clogging the seal water strainer, thereby reducing the seal water flow.

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9301060100 821221 PDR ADOCK 05000219 s PDR ,

Nonroutine Environmental Operating Report Page 2 Report No. 50-219/82-4 Analysis of Occurrence The continuous operation of the dilution pumps is required to maintain water temperatures within the specified limiting conditions. The objective of operating the dilution pumps in the prescribed manner is to minimize the occurrence of adverse biological effects in Oyster Creek and contiguous water.

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Since the operation of an insuf'icient number of dilution pumps was of limited duration, there were no harmf l marine biological effects observed.

i Corrective Action Immediate corrective action involved clearing the debris from the strainer and restarting dilution pump 1-3.

Long term action, per a submittal to the Nuclear Regulatory Commission on July 1,1981, involves a total dilution pump refurbishment program designed to improve the reliability and operability, is in progress. This includes upgrading of the dilution pump seal water and lubricating oil cooling water systems, pipe line strainers, pipe and heat tracing and overhaul of dilution pumps .

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