ML20041F189

LER 82-010/03L-0:on 820206,oxygen Analyzer B for Containment Atmosphere Dilution Sys Found Reading Upscale.Probably Caused by Corrosion on Contacts Due to Bad Connection Between Oxygen Analyzer Cell & Terminal Strip

ML20041F189
Person / Time
Site:	Duane Arnold
Issue date:	03/05/1982
From:	Varner D IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20041F184	List: ML20041F183 ML20041F189
References
LER-82-010-03L, LER-82-10-3L, NUDOCS 8203160276
Download: ML20041F189 (1)

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AEPQAr cart EVENT QESCRIPTION ANO PmCSA8LE CONSECUENCES h t o 12 l l Durina normal operation, the 'B' oxygen analyzer for the containment atm 1 m i osphere dilution system was found to be readina upscale and was declared l Io tal l inoperable. The ' A' oxyaen analyzer was inoperable for modifications. A l 1o151 I forced power reduction was beaun to take the reactor out of power operat i 1o la i i ion as required by Technical Soecification 3.7. A.6.c. Forced oower reduc I l a l 71 I t ion ended 5.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> later when the 'R' analyzer was made operable. Ther I lois1 I e have been no previous occurrences with a similar cause. I 7 8 9 80 SoTa" Ye'c su'AC$e CompoNaNT Coos su'sYo's sSECs loiSI F G l Sl El@

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CAUSE DESCRIPTICN ANQ CCARECTIVE ACTICNS 27 li i a l l The cause of the 'B' analyzer f ailure is unknown, but a bad connection b l 1 e 1i l I etween the oxyaen analyzer cell and the terminal strio caused by corross 1 iii2i l ion on the contacts is suspected. All connections were tight, but when o i Ii 121 I ne c rnnectinn was loosened and retichtened, the analyzer beaan to work. I l

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