ML20039B022
| ML20039B022 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 11/24/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Counsil W NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| LSO5-81-11-061, LSO5-81-11-61, NUDOCS 8112220194 | |
| Download: ML20039B022 (3) | |
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. s,V DISTRIBUTION Docket NRC PDR
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November 24, 1981 Local PDR ORB Reading NSIC 1
DCrutchfield Docket No. 50-245 HSmith LS05-81-ll-061 JShea SNowicki OEld OI&E (3) 8 ACRS (10)
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Mr. W. G. Counsil, Vice President re atte j
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'fortheast Nuclear Eneroy Company Post Office Box 270
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Dear !!r. Counsil:
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SUBJECT:
DEGRADED GRID VOLTAGE PROTECTION FOR flILLSTONE UNIT 1 l
We are continuing our review of the captioned matter and request that you respond to the enclosure to this letter. Yourrespons[isrequested I
within 30 days of your receipt of this letter.
Sincerely, i
ORIGINAL SIGNED BY Thomas V. Wambach for/
Dennis ii. Crutchfield, Chief Operating Reactors Branch #5 Division of Licensing l
Enclosure:
As stated cc w/ enclosure:
See next page
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w e a Mr. W. G. Counsil November 24,198Il CC William H. Cuddy, Esquire Connecticut Energy Agency Day, Berry & Howard ATTN: Assistant Director Counselors at Law Research and Policy One Constitution Plaza Development Hartford, Connecticut 06103 Department of Planning and Energy Policy Natural Resources Defense Council 20 Grand Street 91716th Street, N. W.
. Hartford, Connecticut 06106 Washington, D. C.
20005 Northeast Nuclear Energy Company ATTN: Superintendent Millstone Plant P. O. Box 128 Waterford, Connecticut 06385 Mr. Ricnard T. Laudenat Manager, Generation Facilities Licensing Northeast Utilities Service Company.
P. O. Box 270 Hartford, Connecticut 06101 Resident Inspector c/o U. S. NRC P. O. Box Drawer KK Niantic, Connecticut 06357 Waterford Public Library Rope Ferry Road, Route 156 Waterford, Connecticut 06385 First Selectman of the Town of Waterford Hall of Records 200 Boston Post Road Waterford, Connecticut 06385 John F. Opeka Systems Superintendent s
Northeast Utilities Service Company P. O. Box 270 Hartford, Connecticut 06101 s
U. S. Environmental Protection Agency Region I Office ATTN: EIS COORDINATOR JFK Federal Building Boston, Massachusetts 02203 l
.r ENCLOSURE r
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DEGRADED GRID PROTECTION, _
REQUEST FOR ADDITIONAL INFORMATION MILLSTONE 1 l
A listing of all Class 1E equipment that may be running,or ma'y automatically 1.
start and tho interval of time that these equipment will be exposed to a degraded voltage under all plant conditions of operation.
Mar,afacturers' data or appropriate testing to assure that no dam, age to these '
2.
Class 1E equipment (i.e., motors, control circuits, fases, etc) will occur and that they will be able to meet the system functional requirements The during the interval'of exposure to a degraded voltage condition.
9 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.
Description of the information system provided in the main control room' 3.
for the operator to follow the course of the transient and take necessary corrective action to ensure thit Class 1E equipment are not damag'ed.
4.
Description of the operator trainir.g and plant operating procedures instituted to ensure-that the operator will make appropriate and prompt decisions to cope with this transient.
Description.of a program to assure the rel'iability and availability of 5.
the information system, referred to in item 3 abov,e.
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