ML20028D651
| ML20028D651 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 01/07/1983 |
| From: | GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20028D637 | List: |
| References | |
| RO-82-9, NUDOCS 8301190339 | |
| Download: ML20028D651 (2) | |
Text
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Oyster Creek Nuclear Generating Station Forked River, New Jersey 08731 Nonroutine Environmental Operation Report No. 50-219 82-9 Report Date January 7, 1983 Occurrence Date December 8, 1982 Identification of Occurence Failure to meet monitoring requirements as defined in Environmental Technical Specifications ( Appendix B, Section 2.1.4 Monitoring Requirements). The temperature sensor instrumentation located just upstream of the U.S. Route 9 bridge in the discharge canal did not meet the overall system accuracy limits of +.55 C (+1.0 F) as specified in Section 2.1.4 Monitoring Requirements.
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This event is considered to be a Nonroutine Environmental Report as defined in the Technical Specifications, Appendix "B", Paragraph 5.6.2.
Conditions Prior to Occurrence Dilution Pump Flow 5.20 E5 Circulating Water Pump Flow 3.45 E5 Description of Occurrence During the routine monthly calibration of the station's discharge water Route 9 bridge temperature monitoring system (procedure 664.3.002), it was observed that the Control Room recorder was not printing the actual temperature at the 0
Route 9 bridge monitoring location; the temperature was not within +1 F (print temperature was 54.5 F, actual temperature was 55.78 F). Immediate17 following 0
0 this determination, the temperature monitoring channel was recalibrated in accordance with the calibration procedure.
Apparent Cause of Occurrence The as found parameter for this temperature monitoring channel indicated the cause of the lower printed temperature than that of the actual temperature was due to a slight downward drif t of the temperature transmitter's zero and span adju stments.
8301190339 830107 I
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Ncnrqutina Enviramental Oparating R:p3rt Page 2
' Report No. 50-219 82-9 Analysis of Occurrence Continuous monitoring of water temperatures in the discharge canal is required to maintain the temperatures within the specified limiting conditions. The objective.of monitoring water temperatures in the discharge canal is to minimize the occurrence of adverse biological ef fects in Oyster Creek.and contiguous water. There were no harmful biological ef fects observed during the
. period when the overall system accuracy of the temperature sensor instrumentation at the U.S. Route 9 bridge did not meet the monitoring requirements as specified in Enviromental Technical Specifications (Appendix B, Section 2.1.4 Monitoring Requirements).
Corrective Action The corrective action involved recalibrating the temperature transmitter.
Subsequently, the condition, as lef t, of the monitoring channel was that the i
recorder was printing the actual water temperature, within the +10F requirement.
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