ML20039B021
| ML20039B021 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 11/24/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Kay J YANKEE ATOMIC ELECTRIC CO. |
| References | |
| LSO5-81-11-062, LSO5-81-11-62, NUDOCS 8112220192 | |
| Download: ML20039B021 (3) | |
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DISTRIBUTION
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Senior Engineer-Licensing RPrevatte Yankee Atomic Electric Company 1671 Worcester Road Framingham,-Mossachusetts 01701 Cear fir. Kay:
SUB' JECT: DEGRADED GRID VOLTAGE PROTECTION FOR YANKEE-ROWE
- Me ere continuing our review of the captioned natter and request that' yet, respond to the enclosure to this letter. YourresponseMsrequested within.30 days of'your receipt of this letter.
Sincerely.
ORIGINAL' SIGNED BY Thomas V. Wambach for/
Dennis H. Crutchfield, Chief-Operating Reactors Branch #5 Division of Licensing
Enclosure:
As stated cc w/ enclosure:
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' November 24, 1981 cc Mr. James E. Tribble, President
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Yankee Atomic Electric Company 25 Research Drive Westborough, Massachusetts 01581 Greenfield Connunity College 1 College Drive Greenfield, Massachusetts 01301 Chairman Board of Selectmen Town of Rowe Rowe, Massachusetts 01367 Energy Facilities Siting Council 14th Floor One Ashburton Place f
Boston, Massachusetts 02108 U. S. Environmental Protection Agency Region I Office ATTN: Regional Radiation Representative JFK Federal Building Boston, Massachusetts 02203 Resident Inspector Yankee Rowe Nuclear Power Station c/o U.S. NRC
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Post Office Box 28 Monroe Bridge, Massachusetts 01350 t
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ENCLOSURE
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DEGRADED GRID PROTECTION,,,
REQUEST-FOR ADDITIONAL INFORMATION
- a YANKEE-ROWE l
1.
A listing of all Class lE equipment that may be running,or ma'y automatically start and the interval cf time that these equipment wil.1 i>e exposed to a degraded voltage under all plant conditions of operation.
2.
Manufacturers' data or appropriate testing to assure that no damage to these '
Class lE equipment (i.e., motors, control circuits, fuses, etc) will occur and that they will be able to meet the system functional requirements during the interval of exposure to a degraded voltage conditior!. The degraded voltages will include levels down to the loss of grid voltage relays (first level) which will provide-automatic disconnection from the the degraded power source.
3.
Description of the information system provided in the main control room for the operator to follow the course of the transient and take necessary corrective action to ensure that Class lE equipment are not damaged.
4.
Description of the operator training and plant oparating procedur.es instituted to ensure-that the operator will make appropriate and prompt decisions to cope with this transient.
l 5.
Description.of a program to assure the reliability and availability of the information syste':n, referred to in item 3 abov,e.
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