ML19253A315

Nonroutine Environ Operating Rept 50-219/79-03 on 790719: Dilution Pump 3 Tripped Out of Svc & Pump 2 Was Not Started for 18 Minutes.Caused by Seaweed Buildup in Seal Water Pump Sections.Pump Cleared

ML19253A315
Person / Time
Site:	Oyster Creek
Issue date:	08/14/1979
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
Shared Package
ML19253A311	List: ML19253A310 ML19253A315
References
NUDOCS 7908210307
Download: ML19253A315 (2)

Text

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• -hid Mornstown, New Jersey 07950 (201)455-8200 OYSTER CHEEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Nonroutine Environmental Operating Report No. 50-219/79-3 Repo;t Date August 14, 1979 Occurrence Date July 19, 1979 Time of Occurrence 00:22 to 00:40 identification of Occurrence Exceeded a limiting condition of operation of the Technical Specifications, Appendix B, paragraph 2.1.4.3 This event is cnnsidered to be a nonroutine 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: 5.2 x 105 gpm Circulating Pump Fica: 4.6 x 105 gpm Powe r: Reactor 1818 MWt Electrical 606 MWe Description of Occurrence At 00:22 of July 19, 1979, dilution pump #3 tripped out of service. Dilution pump #2 was rot started until 00: 40. This was not in conformance with the limiting condition of operation which requires that the reserve dilution pump be placed into service within fifteen minutes whenever there is an in-sufficient number of dilution pumps operating to meet the intent of the spec fications.

Appa ren t Cause of Occurrence Dilution pump #3 tripped out of service because of low seal water pressure.

The low seal water pressure was due to a buildup of seaweed in the seal water pump section(s). Pricr to starting the reserve dilution pump, the suction 800 2g 7 9 08 210 3c)7 accm cy:e Pow e. tm corroon, w c e tre c.m n. - : um et s,nrn g

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- + Nonroutine Environmental Operating Report No. 50-219/79-3 Page 2 August 16, 1979 of the backup seal water pump had to be cleared. Once this was accomplished, a normal startup of dilution pump #2 was performed.

Analysis of Occurrence During this occurrence, no unusual environmental effects were observed.

Records of the discharge bridge temper.~ .a for the period show no unusasi variations (less than 1*F. change). With respect to these slight variations in the discharge bridge temperatures, no unusual environmental effects would be expected.

Whenever an insufficient number of dilution pumps are available to meet the intent of the specifications, the Technical Specifications allow station operation for a period of fourteen days in order to make necessary repairs.

Corrective Action The immediate corrective action ..as to clear tae suction bell of the seal water pump so that suf ficient seal water would be available to start the reser're dilution pump.

Failure Data N/A b

800 23