05000318/LER-1980-053-03, /03L-0:on 801101 & 07,containment Atmosphere Particulate Monitor Failed.Caused by Loosened Channel Field Cable Leads Due to Improper Crimping.New Connectors Properly Installed

/03L-0:on 801101 & 07,containment Atmosphere Particulate Monitor Failed.Caused by Loosened Channel Field Cable Leads Due to Improper Crimping.New Connectors Properly Installed

ML19351E638
Person / Time
Site:	Calvert Cliffs
Issue date:	12/01/1980
From:	Lagiewski J, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19351E633	List: 05000318/LER-1980-053, Forwards LER 80-053/03L-0 05000318/LER-1980-053-03, /03L-0:on 801101 & 07,containment Atmosphere Particulate Monitor Failed.Caused by Loosened Channel Field Cable Leads Due to Improper Crimping.New Connectors Properly Installed
References
LER-80-053-03L, LER-80-53-3L, NUDOCS 8012100557
Download: ML19351E638 (2)

LER-1980-053, /03L-0:on 801101 & 07,containment Atmosphere Particulate Monitor Failed.Caused by Loosened Channel Field Cable Leads Due to Improper Crimping.New Connectors Properly Installed

Event date:
Report date:
3181980053R03 - NRC Website

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60 61 DOCsLET NUVS ER 68 69 EVENT D ATE 14 73 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CoNSECUENCES h I o 121 l Durino normal operation, the Control Room Ooerator Miscovered the con-1 tainment atmosphere particulate monitor failed and alarming intemit-1 io i3 i l io l4 l l tently at 1730 and again at 1400 on 11/7/80 (T.S. 3.4.6.1).

Followina t-corrective maintenance the monitor was retur, ed to service at 1500 on I

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io is i l 11/6/80 and again at 0925 on 11/12/80. The containment atmosphere cas-1 1017] I eous monitorino system and containment sumo level alam system remained I

loisii operable throughout these events. This is not a repetitive occurrence, f

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CAUSE CESCRIPTioN AND CCRRECTIVE ACTIONS 27 l 3 loi j The channel's field cable leads were found to be loose within their con-1 i,i,il -

nector receptacles. Proper crimoing of the leads had not been accom-I plished during installation of the equipment. New connectors (Deutsch i

,,,,,I No. 0507-12S-059/DS07-12P-059) were properly in; talled. Connectors in I

gl four other channels were inspected. No other problims were found.

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50-318 LICENSE NO. OPR-69 EVENT DATE 11/01/80 REPORT DATE 12/01/80 ATTACHMENT CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (CONT'D)

The loose connections are believed to have caused damage to the channel's test printed circuit board (Al).

In addition, damage to leads was found on the high voltage. junction box circuit card. This damage may have resulted from handling by technicians during the initial troubleshooting t

work. Additional parts were replaced as a precaution against channel failure due to stress imposed during this event. These. included the de-tector tube and printed circuit boards A2 and A3. The channel has oper-ated satisfactorily since it was returned to service.

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