ML20009A966

LER 81-022/03L-0:on 810607,during Testing,Reactor Core Isolation Cooling Turbine Repeatedly Tripped on Overspeed on Fast Starts.Caused by Upward Drift of Flow Controller FIC-2509 High Limit Setpoint.Setpoint Recalibr

ML20009A966
Person / Time
Site:	Duane Arnold
Issue date:	07/07/1981
From:	Schmidt A IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009A959	List: ML20009A958 ML20009A966
References
LER-81-022-03L, LER-81-22-3L, NUDOCS 8107140557
Download: ML20009A966 (1)

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Ngugg a 64 69 EVENT DAf t J. 75 ptPCATQATE 71 8! Il@ $4 EVENT DESCplPTtCN AND PRC8A8LE CONSECUENCEs h Io i 2 I I During surveillance testing RCIC Turbine repeatedly tripped on overspeed I t C i 2, l on fast starts. RCIC Turbine is brought to rated op speed of 4500 RPM by __j 1 o i A I I the Ramp Controller. RCIC turbine speed control is then assumed by RCIC I I o # $ 1 1 Pump Discharge Flow Controller, FIC-2509, keeping turbine speed at/below f 1 ale 1 1hiah limit setooint of 4500 RPM. RLIC operability reauirements listed in I l o ! 71 I beh Soec 3.5.E. HPCI demonstrated to be operable. No previous occurrenc I i o i s i 1 es with FIC-2509 have been recorded.  !

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C.auss ossCaiericN ANQ COA AECDVE ACTICNS h ii i o I I le cause was determined to be _ upward drift of Flow Controller, FIC-2509,  !

l i t i l t hinh limit setnnint. 'he ramn controller remained in control to the coint I li 121 I of oversneed trio. Hioh limit setooint recalibrated and system functional I ii1 1 l lv testod sat hofnro returned to coerational status. FIC-2509 is a GE Flo i tr i 14a Is l w rnntrnilor mndal Ran-01. Nn further enrrective action is clanned.  !

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