ML20236C194
| ML20236C194 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 11/14/1980 |
| From: | Woolever E DUQUESNE LIGHT CO. |
| To: | Novak T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8903220015 | |
| Download: ML20236C194 (2) | |
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, United States Mucicar Regulatory Commission
-Division of Reactor Licensing Washington, DC 20555 Attention Thomas Novak, Assistant Director for Operating Reactors I.
References Beaver Valley Power Station, Unit #1 Docket No. 50-334 Interim Operating Administrative Controls l i Gentlemon:
The purpose of this lettier is to document the administrative controls and responso to alarm procedures which will be in ef fect during power oper-p O
ation of the Beaver Valley Power Station for the next 6-month period.
These controls and procedures have been placed.into effect as a result of s
discussions between members of the staff of the Nuclear Regulatory Commission,
These measures have been determined r
and members of the Duquesne Light Company.
to be necessary during the perica of timo, not to exceed 6 months, that the pressurizer safety and power operated relief valves are being operated with-
[o out a water loop seal at the inlet to these valves.
L No more than one power-operated relief valve shall be operated with the i
The receipt of alarm corresponding rnotor operated isolation valve opened.
from the TBD whic'n is located downstream of the relief valves (setpoint 275 F) will initiate immediate operator action to close the single motor operated valve that isolates the relief valve which is in service in an 'unisolated mode.
The Temperature Resistance Bulbs on the discharge line from each b N valve will serve as the critoria for deto'rpining the occurrence of a leaking A temperature reading of $2'l (Saturation pressuro for 5 psig)
[Mr p elid valvo.which can not be corrected within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> will cause the plant to be placed in the hot s'autdown condition within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and the cold shutdown con-dition wi+:hin the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to perform maintenance on the leaking valvo.
At that time, prosaure switchen will bo installed on each of the three safety valves to monitor pilot valve leakage. These pressure switches will be set to provido a visual indication of a pressure equal to or greater than 550 Future oper-psig in the cavity above the operating piston of the main valve.
ation will require that the p'lant will be brought to the hot aad cold shutdown conditions as previout.ly described on the basis of this prossere sensing devico instead of the previously described temperature criteria.
During the same shutdown at which the pressuro switches are installed, the continuous drain in lecy seal ahead of the three power operated relief valves
-will be renoved. Thio will permit a water soal to be maintained at the inlet 3
h to these valven.
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.Page 2 lovember 14, 1980
-Operation of the plant in this mode will not continue for longer than G months from the dato of this letter.
All cmorgency operating proceduros which require the use of the power-operated relief valvos will be reviewed and revised prior to power operation to incorporate the offeet of operation with the motor operated isolation valvos
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The plant will be shutdown, and sufficient modifications will bo installed to pomit the establishment of a water seal on the inlet sido of all safety and relief valvos at the end of this period of time.
Any further modifications that are required to eliminate potential over-
- i strocs conditions on the discharge piping between the first restraint on the dischargo side of those valves and the pressurizer relief tank will be installed no later than the next refueling of the Unit.
Very truly yours,
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. Woolever Vice President of Engineerincj and Construction COFDIONWEALT!! 0F PENNSYLVANIA I
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I COUNTY OF BEAVER l
Sworn to and subscribed beforo no this /M day of November, 1980.
f Witness my hand and seal.
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}!Y CO)D!ISSION EXPIRES: JUDITH 0. ANTHONY Notary PubMc Shipp!njport Bereg;h, Deaver Co Pa.
My Commlulon Dpires Dec. 12,' 1983 J 1
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