ML20215B084
| ML20215B084 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 12/05/1986 |
| From: | Lacey W DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION (ADM) |
| References | |
| ND1SS1:2971, NUDOCS 8612120028 | |
| Download: ML20215B084 (3) | |
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'Af Telephone (412) 393-6000 Nuclear Group P.O. Box 4 Shippingport, PA 15077-0004 December 5, 1986 NDISS1:2971 Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Special Report United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen:
In accordance with Appendix A, Beaver Valley Technical Specification 3.3.3.3, " Seismic Instrumentation," the following Special Report is submitted. This report is required when the conditions specified in Technical Specification 3.3.3.3.b are not satisfied.
On October 27, 1986, at 1130 hours0.0131 days <br />0.314 hours <br />0.00187 weeks <br />4.29965e-4 months <br />, XT-ER-105B, Triaxial Time History Accelerometer, was declared out of service during the performance of Maintenance Surveillance Procedure (MSP) 45.01.
This is nonconservative with respect to Technical Specification 3.3.3.3 and reportable per Technical Specification 3.3.3.3.b.
This channel is one of two that monitor seismic movement inside the containment structure. The accelerometer was removed from the containment structure and was partially decontaminated. The accelerometer could not be decontaminated sufficiently to allow for shipment to the vendor (Kinemetrics) for repair.
Investigations indicated a faulty connector and cabi'ng to field. These components were corrcued due to an inadvertent refueling cavity overflow that occurred during the refueling operations conducted during May-August 1986.
8612120028 861205 4
DR ADOCK 0500
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December 5, 1986 NDISS1:2971 Page two Replacement components have been ordered, however, these components are not scheduled to leave the vendor until December 5, 1986. After receiving delivery, it is not expected that the components will be installed and the accelerometer restored to operable status within 30 days of the initial failure, therefore, this report is being submitted in accordance with Technical Specification 3.3.3.3.b.
The replacement components are scheduled to be installed during the next planned outage of sufficient duration due to ALARA considerations under operating conditions. Scheduling this repair in this manner represents a savings of 20 man-rem for performance of this repair during an outage condition vice an operating condition.
There were no safety implications to the public because no seismic activity occurred prior to the accelerometer failure, and a redundant containment structure acceleroma.ter and a primary auxiliary building accelerometer are operable to monitor seismic activity until this accelerometer is returned to service.
Very truly yours,
- f
- V Wm. S. Lacey Plant Manager JGT/ vat Attachment
6 December 5, 1986 NDISS1:2971 Page three cc: Dr. Thomas E. Murley Regional Administrator United States Nuclear Regulatory Commission Region 1 King of Prussia, PA 19406 C. A. Roteck, Ohio Edison Mr. Peter Tam, BVPS Licensing Project Manager United Status Nuclear Regulatory Commission
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Washington, DC 20555 W. Troskoski, Nuclear Regulatory Commission, BVPS Site Inspector Mr. Alex Timme, CAPCO Nuclear Projects Coordinator, Toledo Edison INPO Records Center Suite 1500 1100 circle 75 Parkway Atlanta, GA 30339 G. E. Muckle, Factory Mutual Engineering, Pittsburgh Mr. J. A. Triggiani, Operating Plant Projects Manager Mid Atlantic Area Westinghouse Electric-Corporation Nuclear Services Integration Division Box 2728 Pittsburgh, PA 15230 American Nuclear Insurers c/o Dottie Sherman, ANI Library The Exchange Suite 245 270 Farmington Avenue Farmington, CT 06032
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