ML20151K153
| ML20151K153 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/31/1997 |
| From: | FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML20151K138 | List: |
| References | |
| NUDOCS 9708050351 | |
| Download: ML20151K153 (1) | |
Text
-
,, U. 5. Nuclear Regulatory Commission 3F0797213 Page 3 of 4 ADDENDUM 2 (to the June 1997 NPDES Monthly Discharge Report)
Crystal River South (Units 1 & 2)
NPDES FL0000159/IT09-154804F The effluent discharge data for June 1997 indicated an instantaneous maximum
-temperature of 97.2*F.
The instantaneous maximum permit limit for temperature at the bulkhead line is 97.0*F.
At 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br />, Units 1 and 2 were producing an electrical output of 380 MW and 504 MW, respectively.
The point of discharge (P00) temperature was 95.6*F and trending upwards at a rate of approximately l'F per hour.
Plant staff placed one of the Helper Cooling Towers (#4) in service at 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br />. The tower was fully operational at approximately 1220 hours0.0141 days <br />0.339 hours <br />0.00202 weeks <br />4.6421e-4 months <br /> with a P00 temperature of 96.2*F.
Approximately forty minutes later (1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />), the trending chart indicated a downward movement of the POD temperature, which lasted for approximately five minutes. At approximately 1305 hours0.0151 days <br />0.363 hours <br />0.00216 weeks <br />4.965525e-4 months <br />, the POD temperature began trending upwards again.
This trend continued despite plant staff's efforts to decrease the temperature with the cooling tower. The P0D reached 97.0*F at 1130, 97.1*F at 1340 and 97.2*F at 1350 hours0.0156 days <br />0.375 hours <br />0.00223 weeks <br />5.13675e-4 months <br />. The temperature dropped to 96.2*F at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />.
j Factors contributing to the exceedance of the instantaneous maximum temperature limit were an inoperative tide level indicator, an incoming tide and a westerly wind. The tide level indicator is back in service and plant operators have been instructed to initiate operation of the cooling towers earlier during upward trends in temperature.
i 9708050351 970731 PDR ADOCK 05000302 S