ML20040C615
| ML20040C615 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 12/22/1981 |
| From: | JERSEY CENTRAL POWER & LIGHT CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20040C598 | List: |
| References | |
| NUDOCS 8201290084 | |
| Download: ML20040C615 (2) | |
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OYSTER CREEK NUCLEAR GENERATING. STATION Forked River, New Jersey 08731 Nonroutine Environmental Operating Report No. 50-219 81-4-2 Report Date December 22, 1981 Occurrence Date R>vember 24, 1981 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.
Conditions Prior to Occurrence Steady State Power Dilution Pump Flow 5.20 E5 CIM Circulating Water Pump Flow 4.60 E5 GPM Prior. to the occurrence, the ambient water temperature in the intake canal was 4 3.80F.
The condenser discharge water temperature was 63.70F and the U. S.
Route 9 Discharge Bridge temperature was 50.90F.
De scription of Occurrence At 1127 hours0.013 days <br />0.313 hours <br />0.00186 weeks <br />4.288235e-4 months <br /> on November 24, dilution pump 1-2 tripped of f leaving only dilution pump 1-1 in operation.
At 1205 hours0.0139 days <br />0.335 hours <br />0.00199 weeks <br />4.585025e-4 months <br />, dilution pump 1-3 was put into service.
Apparent Cause of Occurrence The cause of the trip could not be determined at the time of the occurrence.
Itistorically, incidents of this nature have been attributed to high lubricating oil temperatures and low seal water pressure.
It is possible that one of these f actors or a combination of these factors could have caused the dilution pump to fail.
8201290094 811222 PDR ADOCK 05000219 S
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Nonroutine Environmental Operating Report Page 2 Report No. 50-219 81-4-2 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.
Since the operation of an insufficient number of dilution pumps was of limited duration, there were no harmful marine biological effects observed.
Corrective Action Immediate corrective. action involved starting dilution pump 1-3.
Long term action involves a total dilution pump improvement program, as per a submittal to the Nuclear Regulatory Commission on July 1,19 81, 3esigned to improve their 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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