ML20064E722
| ML20064E722 | |
| 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: |
| References | |
| RO-82-6, NUDOCS 8301060107 | |
| Download: ML20064E722 (2) | |
Text
'
OYSTER CREEK NUCLEAR' GENERATING STATION Forked River, New Jersey 08731 Nonroutine Environmental Operating Report No. 50-219/82-6 Report Date Occurrence Date November 30, 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 600F.
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 repairs.
Prior to the occurrence, the ambient water temperature in the intake canal was 47.2 F.
The condenser discharge water temperature was 57.20F, and the U.S.
0 Route 9 discharge bridge temperature was 49.0 F.
Description of Occurrence At 0739 hours0.00855 days <br />0.205 hours <br />0.00122 weeks <br />2.811895e-4 months <br /> on November 30, 1982, dilution pump 1-2 was removed from service because of mud-clogged grates, leaving only dilution pump 1-3 in operation. At 0213 hours0.00247 days <br />0.0592 hours <br />3.521825e-4 weeks <br />8.10465e-5 months <br /> on December 1,1982, dilution pump 1-2 was returned to service.
Apparent Cause of Occurrence Dilution pump 1-2 was removed from service as a result of mud and debris blocking the water flow to the dilution pump, resulting in a pressure gradient across the grates.
8301060107 821221 PDR ADOCK 05000219 S
PDR A
Nonroutine Environmental Operating Report '
Page 2 Report No. 50-219/82-6 l
Analysis of Occurrenee The continuous operation of the dilution pumps is required to maintain water temperatures within.the specified limiting conditions. The objective of j
operating the dilution pumps in the prescribed manner is to minimize the occurrence of adverse biological ef fects in Oyster Creek and contiguous water.
There were no harmful marine biological effects observed during the period when an insufficient number of dilution pumps operated.
Corrective Action Immediate corrective action involved restoring proper flow through the grates by removing the mud and debris, then restarting pump 1-2.
Additionally, 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 of the pumps. 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.
l-t D
t
,,e-
,n w--
--.--y
.,,-_