ML20053C927
| ML20053C927 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 05/20/1982 |
| From: | GENERAL PUBLIC UTILITIES CORP. |
| To: | |
| Shared Package | |
| ML20053C918 | List: |
| References | |
| RO-82-3, NUDOCS 8206030171 | |
| Download: ML20053C927 (3) | |
Text
- _ - _ _ - _ _ _ _ _ _ _ _
o c -..
OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Nonroutine Environmental Operating Report No. 50-219 82-3 Report Date
.May 20, 1982 Occurrence Date April 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 operatian 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 les s 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 Steady State Power Dilution Pump Flow 5.20 E5 GPM Circulating Water Pump Flow 3.45 E5 GPM Dilution Pump 1-1 out of service for maintenance.
Prior to the occurrence, the ambient water temperature in the intake canal was 5 7. 00F, The condenser discharge water temperature was 73.7 F and the U.S.
Route 9 Discharge Bridge temperature was 64.30F.
De scription of Occurrence At 0957 hours0.0111 days <br />0.266 hours <br />0.00158 weeks <br />3.641385e-4 months <br /> on April 30, 1982, dilution pump 1-2 tripped off, leaving only dilution pump 1-3 in service. Dilution pump 1-2 was returned to service at 1150 hours0.0133 days <br />0.319 hours <br />0.0019 weeks <br />4.37575e-4 months <br /> on April 30, 1982.
At 1243 hours0.0144 days <br />0.345 hours <br />0.00206 weeks <br />4.729615e-4 months <br /> on April 30, 1982, dilution pump 1-2 tripped off, leaving only dilution pump 1-3 in service.
Dilution pump 1-2 was returned to service at 1312 hours0.0152 days <br />0.364 hours <br />0.00217 weeks <br />4.99216e-4 months <br /> on April 30, 1982.
8206030171 820520 PDR ADOCK 05000219 S
--_--__----_-____-__-_A
Nonroutine Environmental Operating Report No. 50-219 82-3 Page 2 At 1417 hours0.0164 days <br />0.394 hours <br />0.00234 weeks <br />5.391685e-4 months <br /> on April 30, 1982, dilution pump 1-2 tripped of f because of low oil flow, leaving only dilution pump 1-3 in service.
Dilution pump 1-2 was returned to service at 1505 hours0.0174 days <br />0.418 hours <br />0.00249 weeks <br />5.726525e-4 months <br /> on April 30, 1982.
At 1545 hours0.0179 days <br />0.429 hours <br />0.00255 weeks <br />5.878725e-4 months <br /> on April 30, 1982, dilution pump 1-2 tripped off, leaving only dilution pump 1-3 in operation.
Dilution pump 1-2 was returned to service at 1715 hours0.0198 days <br />0.476 hours <br />0.00284 weeks <br />6.525575e-4 months <br /> on April 30, 1982.
At 1715 hours0.0198 days <br />0.476 hours <br />0.00284 weeks <br />6.525575e-4 months <br /> on April 30, 1982, dilution pump 1-3 was taken out of service to correct a seal water flow problem, leaving only dilution pump 1-2 in operation.
Dilution pump 1-3 was returned to service at 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br /> on April 3 0, 198 2.
At 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br /> on April 30, 1982, dilution pump 1-2 was taken out of service to make an adjustment on the calibration flow switch, leaving only dilution pump 1-3 in service. Dilution pump 1-2 was returned to service at 2320 hours0.0269 days <br />0.644 hours <br />0.00384 weeks <br />8.8276e-4 months <br /> on April 30,198 2.
Analysis of Occurrence The continuous operation of the dilution pumps is required a 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 observed.
Corrective Action 0957-1150 hours:
Pump 1-2 was restarted immediately af ter the lube oil system was flushed.
l i
1243-1312 hours:
Immediate corrective action involved restarting dilution pump 1-2.
l 1417-1505 hours:
Pump 1-2 was restarted once the proper oil flow was l
re s to red.
1545-1715 hours:
Immediate corrective action involved restarting dilution l
pump 1-2.
1715-2100 hours:
Corrective action involved cleaning the seal water strainer I
in order to restore proper seal water flow, then restarting pump 1-3.
2100-2320 hours:
Immediate corrective action involved restarting dilution pump 1-2 af ter a calibration flow switch was adjusted.
l t
, _. ~ _ _ -. _., _. _., _.., _ _....
Nonroutine Environmental Operating Report No. 50-219 82-3 Page 3 Long term corrective action:
the company has committed to a total dilution pump improvement program designed to improve their reliability and operability. This includes upgrading of the dilution pump seal water end
-lubricating oil cooling water systems, pipe line strainers, pipe and heat tracing and overhaul of dilution pumps. 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 the pump trips in order to effectively plan maintenance.
l l
r l
l
_