05000324/LER-1980-044-03, /03L-0:on 800516,during Source Range Monitor (SRM) Operability PT.1.7.1,full in & Out Indication of SRM a Not Received & SRM D Produced Erratic Indications.Caused by Blown Drive Circuit Fuse & Moisture in Detector Connection

/03L-0:on 800516,during Source Range Monitor (SRM) Operability PT.1.7.1,full in & Out Indication of SRM a Not Received & SRM D Produced Erratic Indications.Caused by Blown Drive Circuit Fuse & Moisture in Detector Connection

ML19318A141
Person / Time
Site:	Brunswick
Issue date:	06/11/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19318A135	List: 05000324/LER-1980-044, Forwards LER 80-044/03L-0 05000324/LER-1980-044-03, /03L-0:on 800516,during Source Range Monitor (SRM) Operability PT.1.7.1,full in & Out Indication of SRM a Not Received & SRM D Produced Erratic Indications.Caused by Blown Drive Circuit Fuse & Moisture in Detector Connection
References
LER-80-044-03L-01, LER-80-44-3L-1, NUDOCS 8006180505
Download: ML19318A141 (2)

LER-1980-044, /03L-0:on 800516,during Source Range Monitor (SRM) Operability PT.1.7.1,full in & Out Indication of SRM a Not Received & SRM D Produced Erratic Indications.Caused by Blown Drive Circuit Fuse & Moisture in Detector Connection

Event date:
Report date:
3241980044R03 - NRC Website

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o 2 I During the performance of the SRM Operability P.T. 1.7.1, the full "In" and "Out" l

(_ indications of SRM A were not received. SRM D produced erratic indications l

o 3 I which rrevented the satisfactory completion of the P.T.

This event did not i

o 4 I affect the health or safety of the public.

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40 41 42 43 44 47 CAuSE OESCRIPTION AND CORRECTIVE ACTIONS l ' SRM A did not give ' full "In" or "Out" indication because of two blown drive l

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[ circuit fuses, which prevented insertion or withdrawal of the SRM. The erratic

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g l. indications of SRM D were the result of moisture in the detector connector.

l The blown fuses in the drive circuit of SRM A were replaced and the instrument l

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A.C. Tollison. Jr.

PHONE:

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LER ATTACHMENT - RO #2-80-44 Facility: BSEP Unit No. 2 Event Date: May 16, 1980 No definite cause for the blown fuses on SRM A was found. Although maintenance had been performed on the drive gear asse.mbly of the SRM several days prior to the event, no relationship between the maintenance and the event could be determined. As there is no previous history of events involving blown SRM drive circuit fuses, this is considered an isolated event not requiring any future action.

The moiature in the SRM D detector connector is believed to have occurred as a result of undervessel CRD mechanism maintenance when water from the vessel could have sprayed onto the connector. A thorough inspection for undervessel leaks will be conducted pending the completion of the Reactar Vessel Hydrostatic Test.

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