ML20053C922
| ML20053C922 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 05/20/1982 |
| From: | GENERAL PUBLIC UTILITIES CORP. |
| To: | |
| Shared Package | |
| ML20053C918 | List: |
| References | |
| RO-82-2, NUDOCS 8206030167 | |
| Download: ML20053C922 (2) | |
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i OYSTER CREEK NUCLEAR GENERATING STATION
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Forked River, New Jersey 08731 Nonroutine Environmental Operating Report No. 50-219 82-2 i
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Report Date i
May 20, 1982
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i Occurrence Date 1
April 29, 1982 i
l Identification of Occurrence l'
i Paragraph 2.1.4.3 of the Environmental Technical Specifications.
An
. insufficient number of dilution pumps was operating to comply with paragraph j
2.1.4.2.o f the' Environmental Technical S pecifications.
Less than two dilution pumps were operating for' a period greater than 15 minutes, and the ambient.
water temperature was less than 60.00F.
This event is considered to be a Nonroutine Environmental Operating Report as defined in the Technical Specifications,' Appendix "B", Paragraph 5.6.2.
l Conditions Prior to Occurrence Steady State Power Dilution Pump Flow 5.2 E5 GPM t
Circulating Water Pump Flow 3.45 E5 GPM Dilution Pump 1-1 was out of service for maintenance.
i Prior to the occurrence, the ambient water temperature in the intake canal was
' 5 4. 50F. The condenser discharge water temperature was 71.30F and the U.S.
I Route 9 Discharge bridge temperature was 60.50F.
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i De scription of Occurrence 1
At 0315 hours0.00365 days <br />0.0875 hours <br />5.208333e-4 weeks <br />1.198575e-4 months <br /> on April 29, 1982, dilution pump 1-2 tripped off, leaving only.
dilution pump 1-3 in operation. At 0337 hours0.0039 days <br />0.0936 hours <br />5.57209e-4 weeks <br />1.282285e-4 months <br /> on April 29, 1982, dilution pump 1
1-2 was returned to service.
Appa rent Cause of Occurcence Low oil pressure caused dilution pump 1-2 to trip.
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Nonroutine Environmental Operating Report No. 50-219 82-2 Page 2 Analysis o f Occurrence -
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 waters.
Since the operation of an insufficient number of dilution pumps was of limited duration, there were no harmful marine biological effects o bs erved.
Corrective Action immediate corrective action involved restarting dilution pump 1-2.
Long term action per a submittal to the Nuclear Regulatory Commission on July 1,1981, involves a total dilution pump improvement program designed to improve their reliability and operability.
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.
Materia l orders have been placed for the necessary parts, with delivery occurring in advance of the start of the next refueling outage.
In addition, a monitoring system will be installed that will specifically identify the cause of pump trips in order to effectively plan maintenance.
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