ML19323A096
| ML19323A096 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 04/11/1980 |
| From: | Werling J DUQUESNE LIGHT CO. |
| To: | |
| References | |
| BVPS:JAW:837, NUDOCS 8004170223 | |
| Download: ML19323A096 (2) | |
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urgh, Pennsylvania DUQUESNE LIGHT COMPANY Beaver Valley Power Station Post Office Box 4 Shippingport, PA 15077 April 11, 1980 BVPS: JAW:837 Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 LER 80-023/OlT I
Mr. B. H. Grier, Director of Regulation United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Mr. Grier:
In accordance with Appendix A, Beaver Valley Technical Specifications, the following occurrence is reported. This matter was discussed with Beaver Valley i
NRC Resident Inspector, Mr. D. A. Beckman, today at 0230 hours0.00266 days <br />0.0639 hours <br />3.80291e-4 weeks <br />8.7515e-5 months <br />.
The plant was in Operational Mode 5 with the steam generators drained and Reactor Coolant System (RCS) level at mid-span in the loops. RCS temperature i
was 101F and the "B" Residual Hect Removal (RHR) Pump was in service.
A complete loss of RHR flow occurred while plant operators were in the process of increasing RHR heat eachanger flow by closing down on the bypass valve. At 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br />, when beginning this evolution, pump flow dropped to zero as the pump became airbound. At this point, the 11. RHR Pump was shut down and the 1A RHR Pump started.
[RH-P-1A] started with no indicated flow and low pump amps, so it was shut down also.
Both pumps were then vented and they were restarted with no effect. RCS loop level was then inpreased to approximately 92r leval in the loops. At j
0108 hours0.00125 days <br />0.03 hours <br />1.785714e-4 weeks <br />4.1094e-5 months <br />, the 1B RHR Pump was started and operated satisfactorily with tha operator continuously venting. At 0130 hours0.0015 days <br />0.0361 hours <br />2.149471e-4 weeks <br />4.9465e-5 months <br />, a nominal 1900 gpm RHR flow was restored with the pumps vented.
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Mr. B. H. Grier April 11, 1980 BVPS: JAW:837 Page 2 The station is moving ahead with an engineering investigation for a continuous vent setup to be used when the loops are partially drained. Station personnel are investigating the as-built piping layout for any deficiencies and associated valves for problems. An abnormal procedure had been written for a total loss of RHR and is in the process of being impicmented.
Any additional information and corrective action will be discussed in a followup report.
Very truly yours, J.A.Werlingb Superintendent cc: Director Of Management & Program Analysis,/'
United States Nuclear Regulatory Commission Washington, D. C.
20555 D. L. Wigginton, BVPS Licensing Project Manager United States Nuclear Regulatory Commission Washington, D. C.
20555 D. A. Beckman, Nuclear Regulatory Commission, BVTS Site Inspector C. A. Olson, Secretary, Prime Movers Committee - EEI C. J. Six, PA Public Utilities Commission, Harrisburg, PA W
.