ML19225B253

LER 79-045/03L-0 on 790622:during Normal Operator Surveillance of Control panels,CAC-ATH-1263-2 Indicated Drywell Oxygen Greater than 4% & Was Erratic.Caused by Corrosion Buildup in Exhaust Check Valve.Instrument Calibr

ML19225B253
Person / Time
Site:	Brunswick
Issue date:	07/18/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19225B250	List: ML19225B249 ML19225B253
References
LER-79-045-03L-01, LER-79-45-3L-1, NUDOCS 7907240363
Download: ML19225B253 (2)

Text

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EveN r orscnin tioy o enCB A!1 E .5E 1 .NCFS Io 2 [During_normaLopera tor _aurycillance_oL_the_contro l panels ,_the_ _op erator_no ticed that I lo 3 (the CAC-ATH-1263-2 was indicating _draywell oxyge.n14 7., and was erratic. From a cali- 1 I" 4 lbration... check on CAG-ATH-1259-2_and_a_sub.s_cgiaent_ca ltbr;ition_on -12M,__it was deter- 1 10 5 livin.ed that the oxygen concentration did not exceed 4%.

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LER CONTINUATION -- RO# 1-79-045 Facility: BSEP Unit No. 1 Event Date: 6-22-79 observed as normal. The maintenance instruction will be revised to check the exhaust check valve for proper operation. This is considered an isolated event and no further action is required.

368 174