ML20009E842

LER 81-053/03L-0:on 810613,26 & 30,pressurizer Level Deviated from Program Level by More than 5%.Caused by Temp Swings Due to Paralleling Main Generator

ML20009E842
Person / Time
Site:	Calvert Cliffs
Issue date:	07/13/1981
From:	Junge M BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009E837	List: ML20009E835 ML20009E842
References
LER-81-053-03L, LER-81-53-3L, NUDOCS 8107280480
Download: ML20009E842 (1)

Text

v NRC F OR*4 366 U. S. NUCLE AR REGULATORY COMMISSION (77 5

• LICENSEE EVENT REPORT CONTROL BLOCK: l I

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) lo lil 8l 9MI DLICENSEE 7

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DATE 7 8 DOCKET NUMBER EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h O 2 l During the past 30 days, pressurizer level has deviated from the program l iO i3i ; level by more than 5% several times (T.S. 3.4.4). For 30 minutes on l l0l4ll June 26, and 15 minutes on June 30, the pressurizer level exceeded the l lO lsi l 5% band while paralleling the main generator. For 7 minutes on June -13 l 0 s l the 5% band was exceeded as charging and letdown were isolated to inves- l l0 l7l l tigate slightly increased RCS leakage. LER 81-40 describes a similar l l O is i i event. l I 80 1 8 9 C E CODE SUBCO E COMPONENT CODE SUBCOD'E SU E I

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q 35 36 31 40 42 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l i 101 1 RCS temo. swinas of 10 degrees are not uncommon when oa:allelina the main I 11111 I cenera tor. These temo. swinos can result in deviatione greator than M l i 2 l from pressurizer program level . Occas'ionally, isolation of charaing and I

, l i l 31 l letdown is necessary and may cause deviations from the 5% band due to I

/ q li14l l \ RCP controlled bleedoff. I.'No corrective actio is deemed necessarv. I 8G 7 8 9 L- .Q L

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lN l to DESCRIPTION NA @ l 68 69 80. S NAME OF PREPARER PHONE: