ML20011A967

LER 81-044/03L-0:on 810922,pressurizer Level Had Deviated from Program Level by More than +/-5% Several Times Over 30- Day Period.Cause Attributed to Temp Swings During Startup Operations.Possible Relaxation of Limit Under Review

ML20011A967
Person / Time
Site:	Calvert Cliffs
Issue date:	10/22/1981
From:	Junge M BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20011A965	List: ML20011A964 ML20011A967
References
LER-81-044-03L-01, LER-81-44-3L-1, NUDOCS 8111030419
Download: ML20011A967 (1)

Text

NRC FORM 366 U. S. NUCLE AR R EGUL ATORY COMMISSION

[ LICENSEE EVENT REPORT CONTROL BLOCK: l 1

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lh (PLEASE P".lNT OR TYPE ALL REQUIRED INFORMATION)

@lM 7 8 9 l D l LICENSEE C l C CODE l N l 2 14l@l150 l 0 l - l 0 l LICENSE 0 l 0 NUVUER l 0 l 0 l - l 0 l 0 25l@l264 l 1LICENSE l 1 l 1TYPE l 140l@lbl l CAI $8 l@

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REPORf DATE 7 60 t> 1 DOCK ET NUMBE R EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121 l During the past 30 days, pressurizer level has deviated from the pro- ._ _ ]

j o l3 l l grca Icvel by more than +/- 5% several times (T.S. 3.4.4). For 7 l o 4 l minutes on September 22 twice on September 23, for 3 and 10 minutes, I o s l twice oa September 29, for 10 and 2 minutes, the pressurizer level l exceeded the +/- 5% band during normal start-up operations. l 10 is l l l0 [il l LER's 81-57 and 50-318/81-33 describe similar events. l I

I O IR I l 80 7 8 9 SYST E M CAUSE CAUSE COMP. VALVE CODE CODE SUerODE COMPONENT CODE SV8 CODE SUBCODE O 9 I C l n l@ Lx_j@ i z l@ l zl zi zl zl zl zl@ Lz_j@ t z_j 18 19 20 7 8 9 to it 12 13 SEQUE N TI AL OCCUR R E NCE REPORT R E VISIC'J EVENT YE AR REPOttT NO. CODE TYPE N O.

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]g 42 Jg 43 l zl 9l 9l 9lg 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lilRql RCS temperature swings of 10 degrees are not uncommon during start-up l i 3 l operations. These temperature swings can result in deviations of c,reat- l

,, , ., , l er than +/- 5% from pressurizer program level. Investigation into the l relaxation of this limit is currently in progress. l

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NAME OF PREPARER

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