ML19211C722

Nonroutine Environ Operating Rept 50-219/79-8:on 791228,w/ Plant in Steady State Operation,Dilution Pump Tripped.Caused by Low Seal Water Pressure.Starting & Tripping Switching Reset.Lube Oil Pressure Restored

ML19211C722
Person / Time
Site:	Oyster Creek
Issue date:	01/07/1980
From:	JERSEY CENTRAL POWER & LIGHT CO.
To:
Shared Package
ML19211C718	List: ML19211C717 ML19211C722
References
NUDOCS 8001140286
Download: ML19211C722 (2)

Text

i Pg* Jersey Central Power & Ught Company

'g (g , 4 . g, (4" g Madison Avenue at Punch Bowl Road Morristown, New Jersey 07960 (201)455-8200 OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Nonroutine Environmental Operating Report No. 50-219/79-8 Report Date January 7, 1980 Occurrence Date December 28, 1979 Identification of Occurrence Exceeding a Ilmiting condition as defined in the Environmental Technical Speci-fications, paragraph 2.1.4.3, when only one (1) dilution pump was operating for a period of five (5) minutes, out of compliance with Appendix "B" of the Techni-cal Specifications.

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.

Power: Reactor, 1657 Mwt Electric 1, 570 Mwe Dilution Fump Flow: 5.2 x 10 gpm Circulating Pump Flow: 4.6 x 10 gpm Prior to the occurrence, the temperature in Oyster Creek as measured at the -

U.S. Route 9 bridge was 48.5*F. Two dilution pumps were in operation, one dilution pump was being held in reserve. The intake temperature was 38.7*F.

and the discharge temperature was 58.3*F.

Description of Occurrence Dilution pump 1-2 tripped at 1404 hours0.0163 days <br />0.39 hours <br />0.00232 weeks <br />5.34222e-4 months <br />, apparently due to low seal water pressure. Pump 1-1 continued to operate. A restart of I-2 pump failed.

. Starting and tripping switching was reset, lube oli pressure was restored, and dilution pump 1-2 was restarted at 1424 hours0.0165 days <br />0.396 hours <br />0.00235 weeks <br />5.41832e-4 months <br />. Seal water pressure was main-tained. For 20 minutes, only . dilution pump was in operation. The discharge temperature, as measured at the U.S. Route 9 bridge, was 48.5'F at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />, 52.0*F at 1445 hours0.0167 days <br />0.401 hours <br />0.00239 weeks <br />5.498225e-4 months <br />, and 49.l*F at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />.

1741 093 8001140

i Nonroutine Environmental Operating Report No. 50-219/79-8 Page 2 January 7, 1980 Apparent Cause of Occurrence The cause of the trip was momentary low seal water pressure. In attempting to restart the 1-2 pump, its auxiliary oli pump was accidentally tripped.

This caused delay in restarting the 1-2 pump.

Analysis of Occurrence Continuous operation of two (2) dilution pumps when the intake temperature is below 60*F is intended to reduce the number of fish attracted to the discharge canal. This pump operation will encourage fish to migrate south rather than remain in the discharge canal during the winter.

One (1) dilution pump was out of operation for 20 minutes, which resulted in a temperature increase of 3 5*F as measured in Oyster Creek at the U.S. Route 9 bridge. Minimal adverse biological effects accompanied this temperature transient.

Corrective Action The lube oli starting and tripping switching was reset, lube oil pressure was restored, seal water pressure was maintained, and dilution pump 1-2 was

estarted. An engineering request for upgrading the dilution pump seal water system hao been previously submitted to provide for a permanent fix.

Failure Data Not applicable 1741 09L4