ML20132A757

Special Rept:On 850720,maint Steam Monitor RM-MS-100B Declared Out of Svc Due to Receipt of High Alarm W/Normal Background Radioactivity Present.Cause Undetermined. Alternate Monitoring Planned Until Channel Returned to Svc

ML20132A757
Person / Time
Site:	Beaver Valley
Issue date:	07/29/1985
From:	Lacey W DUQUESNE LIGHT CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
ND1SS1:2506, NUDOCS 8509260003
Download: ML20132A757 (2)

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e Shippingport, PA 15077 0004 July 29, 1985 NDISS1:2506 Beaver Valley Power Station, Unit No.1 Docket No. 50-334, License No. DPR-66 ,

Special Report Dr. T. E. Murley Regional Administrator United States Nuclear Regulatory Commission Region 1 Park Avenue King of Prussia, PA 19406 Gentlemen:

In accordance with Appendix A, Beaver Valley Technical Specification, 3.3.3.1, " Radiation Monitoring Instrumentation", the following Special Report is submitted. This report is required when the conditions specified in Tech-nical Specification 3.3.3.1.b are not satisfied.

On 7/20/85 at 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br />, RM-MS-1008, Main Steam Monitor, was declared out-of-service due to the receipt of a high alann with nonnal background

, radioactivity present. This is nonconservative with respect to Technical Specification 3.3.3.1 and reportable per Technical Specification 3.3.3.1.b.

This channel is one of three that monitors atmospheric steam dump valve and code safety relief valve discharge from the steam generator relief headers.

Alternate preplanned monitoring is f_n effect until this channel is returned to service. Investigations to detennine the cause of the erroneous signal were conducted, but yielded no detennination of the root cause. The vendor, Victoreen

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Instruments, was contacted and has been assisting in the troubleshooting. A supplemental report will be issued after the results of this investigation are known. There were no safety implications to the public because no high activity releases occurred prior to the channel failure, and alternate preplanned monitor-ing is available until this channel is returned to service.

Very tr y you rs,

. S. ac Plant Manager j KW/md gDR509260003 850729 t 3 ADOCK 05000334 i PDR i

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T. E. Murley NDISS1:2506 July 29, 1985 Page two cc; Director of Managenent & Program Analysis United States Nuclear Regulatory Commission Washington, D.C. 20555 C. A. Roteck, Ohio Edison Director, Office of In'spection and Enforcement Headquarters United States Nuclear Regulatory Canmission Washington, D.C. 20555 Mr. Peter Tam, BVPS Licensing Project Manager United States Nuclear Regulatory Omnmission Washington, D.C. 20555 W. R. Troskoski, Nuclear Regulatory Cmamission, BVPS Site Inspector, BV-A Mr. Alex Timme, CAPC0 Nuclear Projects Coordinator, Toledo Edison INP0 Records Center Suite 1500 1100 Circle 75 Parkway Atlanta, GA 30339 G. E. Muckle, Factory Mutual Engineering, Pittsburgh 14r. J. A. Triggiani, Operating Plant Projects Manager

, Hid Atlantic Area Westinghouse Electric Corporation Nuclear Services Integration Division

, Box 2728 l Pittsburgh, PA 15230

) American Nuclear Insurers

c/o Dottie Sherman, ANI Library i The Exchange Suite

270 Farmington Avenue l

Farmington, CN 06032 i

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