ML19323C913

LER 80-019/03L-0:on 800411,during Routine Power Operation, RCS Pressure Was Below Tech Spec Requirement for Approx 3 Minutes.Caused by Overshoot in Pressure Control Sys During Slight RCS Pressure Adjustment

ML19323C913
Person / Time
Site:	Millstone
Issue date:	05/13/1980
From:	Rothgeb R NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19323C911	List: ML19323C910 ML19323C913
References
LER-80-019-03L, LER-80-19-3L, NUDOCS 8005190407
Download: ML19323C913 (1)

Text

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. LICENSEE EVENT REPORT 8005190 oNTRot BLOCK: l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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8 60 61 COCKET NUMBE R 68 69 EVENT DATE 75 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h OT 1 IDuring routine power operation, the reactor coolant system pressure was less than that j 1

0 i33 l required by Technical Specification 3.2.6 for a period of approximately 3 minutes. The l l

a l4 j l pressure fluctuation was the result of an overshoot in the pressure control system l l

Isl lduring a slight RCS pressure adjustment. There are no probable consequences since the l c ls i l Unit was operated in accordance with Technical Specifications 3.2.6. Similar events - l 117I Inone. ,

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44 4y CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 i l0 l IAn operator readjusted the RCS pressure control from 2260 PSIA to 2250 PSIA. The spray I i s i j l valves opened and resulted in an overshoot that decreased pressure to 2207 PSIA. The i i i,, l spray valves were shut and all pressurize heaters were energized. RCS pressure was l il3l l restored to greater than 2225 in approximately 3 minutes. l 1 14 1 I I

'sTAIEs#  % POWER OTHER STATUS IS O HY DISCOVERY DESCRIPTION

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• • O PHONE:

203-447-1791