ML19350D718
| ML19350D718 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/12/1981 |
| From: | Novak T Office of Nuclear Reactor Regulation |
| To: | Carey J DUQUESNE LIGHT CO. |
| References | |
| TAC-43846, NUDOCS 8105180451 | |
| Download: ML19350D718 (3) | |
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NUCLEAR REGULATORY COMMISSION UNITED STATES
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WASHINGTON, D. C. 20H5
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P f Docket No. 50-334
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"A Mr. J. J. Carey, Vice President
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Nuclear Division Duquesne Light Company
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N 435 Sixth Avenue Pittsburgh, Pennsylvania 15219 63
Dear Mr. Carey:
Your letter dated Novenber 14, 1980 documented the administrative con-trols and response to alarm procedures which were to be in effect dur-ing power operation of Beaver Valley Power Station, Unit No.1 until the modifications comitted to in that letter were complete. You also.
comitted to a shutdown beginning May 15, 1981, of sufficient duration to complete the modifications if they were not complete by that date.
By letter dated May 6,1981, you infomed us that all modifications comitted to had been completed with the exception of those to the pres-surizer safety valve discharge lines and the restoration of water filled loop seals upstream of the pressurizer safety valves and requested an ex-tension of the time for completion of those modifications until the sec-ond refueling outage. We have completed our review and evaluation of your request and have concluded that operation until the second refueling outage of Beaver Valley Power Station, Unit No.1 without water filled loop seals upstream of the pressurizer safety valves during Cycle 2 is acceptable.
The information you provided s* tes that there has been no leakage of pressurizer safety valves du.ns operation since December of 1980, when leakage through safety valve 551C was repaired. Also, the installation of pressure switches to provide indication of pressure buildup in the pilot valve cavity above the operating piston of the main valves has been completed. Based on this, we agree that the installed pressure switches and safety valve relief line temperature monitoring provide adequate indication to allow safe shutdown of the plant if leakage should develop. Additionally, we have determined that operation withcut water filled loop seals upstream of the pressurizer safety valves during Cycle 2 is an acceptable mode of operation based on the modificatiors and testings made to the safety valve for operating in a steam envircnment.
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Mr. J. J. Carey,
Operation in Modes 1 through 4 while in this condition will require that i
the installed pressure switch indication be monitored at least once per shift and that the plant be brought to the hot shutdown condition within six hours and to the cold shutdown condition within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> if a' pressure sensing device on any of the pressurizer safety valves actuates.
Sincerely, t
homas M. Novak, Assistant Director for Operating Reactors Division of Licensing j
cc: See next page i
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Mr. J. J. Carey Ducuesne Lignt Cocpany cc: Gerald Charneff, Esquire Mr. Jaces A. Werling Jay E. Silberg, Esquire Plant Superintendent Shaw, Pittman, Potts and Trowbridge Beaver Valley Power Station 1800 M Street, N.W.
P. O. Box 4 Washington, D. C.
20036 Shippingpert, Pennsylvania 15077 i
.e Karin Carter, Esquire Mr. John A. Levin Special Assistant Attorney General Public Utility Co=7.ission Bureau of Administrative Enforcement P. O. Box 3265 5th Floor. Executive House Harrisburg, Pennsylvania 17120 Harrisburg, Pennsylvania 17120 Mr. J. D. Sieber, Superintendent Mr. Roger Tapan of Licensing and Cocpliance Stone and Webster Engineering Duquesne Light Company Corporation Post Office Sox 4 P. O. Box 2325 Shippingport, Pennsylvania 15077 Besten, Massachusetts 02107 Irwin A. Popc.isky, Esquire Mr. F. Noon Office of Censumer Advocate P. & D Center 1425 Strawberry Square Westinghouse Electric Corporation Harrisburg, Pennsylvania 17120 Building 7-303 Pi.ttsburgh, Pennsylvania 15230 Mr. Charles E. Thomas, Esqu' ire Theces and Thomas B. F. Jones Memorial Library 212 Locust Street 663 Franklin Avenus
, Box 999 Aliquippa, Pennsylvania 15001 Harrisburg, Pennsylvania 17103 Mr. John Carey, Director Resicent Inspector Nuclear Operations U. S. Nuclear Regulatory Commissien Duquesne Light Cc=pany Pest Office 5cx 29B 435 Sixth Avenue Shippingport, Pennsylvania 15077 Pittsburgh, Pennsyl vania 15219 Mr. R. E. Martin Duquesne Light Company 435 Sixth Avenue Pittsburgh, Pennsylvania 15219 Marvin Fein Utility Counsel City of Pittsburgh 313 City-County Building Pittsburgh, Pennsylvania 15219 i
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