ML19331B543
| ML19331B543 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 08/06/1980 |
| From: | Dunn C DUQUESNE LIGHT CO. |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| TAC-7170, NUDOCS 8008120406 | |
| Download: ML19331B543 (2) | |
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August 6, 1980 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Attn:
Mr. Steven A. Varga, Chief Operating Reactors Branch No. 1 Division of Licensing Washington, DC 20555
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334 Additional Information on NPSH Modifications Gentlemen:
In discussions with Mr. Dave Wigginton of your staff, we were requested to review the applicability of Regulatory Guide 1.106, " Thermal Overload Protection For Electric Motors on Motor Operated Valves," for new motor operated valves added as a result of the NPSH modifications and administra-tive controls to be utilized during testing of the chemical addition system.
Our review has determined that the only new valves added to the chemical addition system for which Regulatory Guide 1.106 is applicable are the flow cutback valves which were added to the discharge of the Quench Spray pumps.
These valves are normally open but receive a containment isolation - Phase B signal to open and close on a low-low level in the Refueling Water Storage Tank. The motor operator thermal overload will be bypassed for bxh of these signals. The bypass scherae will be installed before plant startup.
Procedures will be developed and implemented by plant startup which will institute the following administrative controls to be used for testing the chemical addition system.
1.
Procedures will require notifying personnel performing the test of a containment isolation - Phase B signal so they can restore the system to its normal emergency configuration.
2.
After completion of the test, procedures will require an independent verification of the valve lineup to ensure correct sytem configura-pOl tion.
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Beaver Valley Power Station, Unit No. 1 Docket No. 50-334 Additional Information on NPSH Modifications Page 2 These administrative controls provide assurance that the system will be operable during and after testing.
If you have any questions, contact my office.
Very truly.yours, V
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C. N. Dunn Vice President, Operations cc:
Mr. D. A. Beckman, Resident Inspector U.S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, Pennsylvania 15077 U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C.
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