ML20085F388
| ML20085F388 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 04/06/1975 |
| From: | Dewitt R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML20085F367 | List: |
| References | |
| AO-75-7, NUDOCS 8308220075 | |
| Download: ML20085F388 (2) | |
Text
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SUBJECT - ABNORMAL SCCURRENCE 75 VERIFICATION OF PHONE CONVERSA-TION MR XEN BAKER ON 4/6/75 AT 1930 REPORTED BY JERRY SLADE REPORT NO 75-7 REPORT DATE - APRIL 6, 1975 OCCURRENCE DATE - APRIL 6, 1975 FACILITY - PALISADES PLANT 4 v -A f IDENTIFICATION SF OCCURRENCE - PLANT DISCHARGE EFFLUENT HEAT RATE GREATER THAN 0.5 BILLIGN BTU /HR SF-1201 (RS-39)
DESCRIPTION OF OCCURRENCE -
ON APRIL 6,1975 FROM 0130 TO APPROXIMATELY 0500 THE PLANT DISCHARGE EFFLUENT FROM THE MIXING BASIN EXCEEDED THE 0.5 BILLION BTU /HR TECHNICAL SPECIFICATION LIMIT.
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LPDR L ANALYSIS OF OCCURRENCE -
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- Re NO 88 PRIOR TO PUTTING THE "A" COOLING TOWER IN SERVICE THE CONDENSER INLET VALVE - MGV - 5301 WAS CRACKED GPEN TO REDUCE THE HeTWELL l
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TEMPERATURE.
THIS WAS BONE TO AVOID THERMAL SHOCKING THE CONDENSER TUB ES.
THE WATER PASSING THRU THE CONDENSER DISCHARGED OVER THE
@e PUMP SUCTION BASIN INTO THE PLANT DISCHARGE EFFLUENT MIXING BASIN.
SStn AT THE TIME THE LAKE INLET TEMPERATURE WAS 36 DEGREES F.
THE MIXING !
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BASIN OUTFALL WAS RAISED TO A MAXIMUM OF 74 DEGREES F.
THIS CALCU-LATES TO A MAXIMUM DISCHARGE HEAT RATE OF 1.42 BTU /HR WITH AN ESTIMATED 75000 GALLONS PER MINUTE FLOW RATE.
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i CORRECTIVE ACTION -
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THE DISCHARGE HEAT RATE WAS REDUCED SELOW THE TECHNICAL SPECIFICATION LIMIT ONCE THE "A" COOLING TOWER WAS PLACED Ih SERVICE.
THIS WAS AT ABOUT 0500 ON APRIL 6, 1975.
PREVIOUS OCCURRENCE - ONCE - A8 75-6.
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PALISADES PLANT SF-1201 (R5-t9)
CONSUMERS POWER COMPANY CBW 1
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SF tN1 (RS-69)
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