05000316/LER-1981-032-03, /03L-0:on 810712,operator Discovered Abnormally High Metal Temp on Turbine Driven Auxiliary Feed Pump Casing,Suction & Discharge Piping.Caused by One of Two Check Valves in Discharge Lines Not Sealing Completely

/03L-0:on 810712,operator Discovered Abnormally High Metal Temp on Turbine Driven Auxiliary Feed Pump Casing,Suction & Discharge Piping.Caused by One of Two Check Valves in Discharge Lines Not Sealing Completely

ML20010C851
Person / Time
Site:	Cook
Issue date:	08/11/1981
From:	Draper D INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20010C847	List: 05000316/LER-1981-032-03, /03L-0:on 810712,operator Discovered Abnormally High Metal Temp on Turbine Driven Auxiliary Feed Pump Casing,Suction & Discharge Piping.Caused by One of Two Check Valves in Discharge Lines Not Sealing Completely 05000316/LER-1981-033-03, /03L-0:on 810714,pressurizer Pressure Dropped to 2,175 Psig While Power Was Being Reduced by Boration to Remove Main Feed Pump from Svc.Caused by Imbalance Between Rates of Reactor Power & Turbine Power Reduction ML20010C846
References
LER-81-032-03L, LER-81-32-3L, NUDOCS 8108210104
Download: ML20010C851 (2)

LER-1981-032, /03L-0:on 810712,operator Discovered Abnormally High Metal Temp on Turbine Driven Auxiliary Feed Pump Casing,Suction & Discharge Piping.Caused by One of Two Check Valves in Discharge Lines Not Sealing Completely

Event date:
Report date:
3161981032R03 - NRC Website

text

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LICENSEE EVENT REPORT

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EVENT DATE 14 7,5 REPORT DATE 30 EVENT DESCRIPTION AND PHO8ABLE CONSEQUENCES O'o lo.12.] l WHILE UNIT TH0 WAS IN NORMAL OPERATION AT 90% POWER AN AUXILIARY EQUIPMENT OPERATOR l g ; ON A ROUTlNE PLANT TOUR DISC 0iERED ABNORMALLY HIGH METAL TEMPERATURE ON THE TURBINE l

,oi ;; DRIVEN AUXILIARY FEED PUMP CASING, SUCTION AND DISCHARGE PIPING. THE PUMP WAS HOT

,j AND HAD NOT BEEN RUNNING. THE STEAM SUPPLY VALVES TO THE TURBINE WERE CLOSED S0 THE l

, o,,, j i PUMP WOULD NOT RUN IN THIS CONDITION AND IT WAS DECLARED INOPERABLE AT 1128 AT WHICH i in ;c j l jo;,;l TIME THE ACTION STATEMENT OF T.S. 3.7.1.2 WAS IN EFFECT. THIS WAS THE FIRST l

OCCURRENCE OF THIS TYPE AND NO PROBABLE CONSEQUENCE RESULTED.

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40 41 47 43 44 47 CAUSE DESCHIPTION AND CORRECTIVE ACTIONS 27 i,,q ; ONE OF Tha CHECK VALVES IN THE DISCHARGE LINES OF THE TURBINE DRIVEN AUXILIARY FEED-l

,,,,j ; WATER PUMP DID NOT SEAL COMPLETELY AND ALLOWED FEEDWATER FROM THE STEAM GENERATORS TO l FLOW BACK TO THE PUMP. DURING AN ATTEMPT TO DETERMINE WHICH VALVE WAS AT FAULT THE l

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D. C. COOK UtilT TWO DOCKET fl0. 50-316 SUPPLEf1EflT TO LER NO. 81-032/03L-0 CAUSE DES,CRIPTION AND CORRECTIVE ACTIONS TO GUARD AGAINST A FAILURE OF THE CHECK VALVES IN QUESTION.

RFC NUMBER IS 12-1861.

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