ML20031F487
| ML20031F487 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 10/06/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Counsil W NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| LSO5-81-10-007, LSO5-81-10-7, TAC-12672, NUDOCS 8110190965 | |
| Download: ML20031F487 (3) | |
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3 DISTRIBUTION Docket TAC 12762 October 6,1981 NRC PDR Local PDR NSIC fu c field Docket No. 50-245 LS05-81-10-007 HSmith JShea OELD Mr. W. G. Counsil, Vice President R
Nuclear Engineering and Operations SEPB Northeast Nuclear Energy Company Post Office Box 270 Hartford, Connecticut 06101
Dear Mr. Cot:
..sil:
SUBJECT:
ADEQUACY OF STATION ELECTRIC DISTRIBUTION SYSTE!! VOLTAGES Re:
Milistone Station, Unit 1 We are continuing our review of the captioned matter and have found that the additional information described in the enclosure to this lette is needed.
Please respond to this request within 45 days of your receipt of this letter.
Sincerely.
Original signed by Dennis M. Crutchfield, Chief Operating Reactors Branch f5 Division of Licensing f[d')o>G f
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Enclosure:
Request for Additional Ith 'e Information rf 4y C
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Mr. W. G. Counsil October 6,1981 i
CC William H. Cuddy, Esquire Connecticut Energy Agency Day, Berry & Howard ATTN: Assistant Director Counselors at Law Research and Policy-Or,e Constitution Plaza Development Hartford, Connecticut 06103 Department of Planning and Energy Policy Natural Resources Defense Council 20 Grand Street 91715th Street, M. W.
Hartford, Connecticut 06106 Washington, D. C.
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Northeast Nuclear Energy Company ATTN: Superintendent Millstone Plant P. O. Box 128 Waterford, Connecticut 06385 Mr. Richard T. Laudenat Manager, Generation Facilities Licensing l
Northeast Utilities Service Company.
P. O. Box 270 Hartford, Connecticut 06101 Resident Inspector c/o U. S. NRC P. O. Box Drawer I K Niantic, Connecticut 06357 i
Waterford Public Library
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4 Rope Ferry Road, Route 156 Waterford, Connecticut 06385 l
l First Selectman of the Tcwn of Waterford Hall of Records i
200 Boston Post Road
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Waterford, Connecticut 06385 I
John F. Opeka Systems Superintendent Northeast Utilities Service Company
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P. O. Box 270 Hartford, Connecticut 06101 s
U. S. Environmental Protection Agency Region 1 Office ATTN: EIS COORDINATOR l
JFK Federal Building Boston, Massachusetts 02203 i
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e7-9 Reference 1: NU letter (W. G. Counsil) to NRC (D. M. Crutchfield),
dated August 20, 1980 Reference 2: NU letter (W. G. Counsil) to NRC (D. M. Crutchfield),
dated November 14, 1980 Reference 3: NU letter (W. G. Counsil) to NRC (D. L. 7.iemanii),
dated November 15, 1979 Submit the voltage-setpoints,. time-delays, and tolerances of the proposed 1.
overvoltage monitors which were mentioned in Ref.1, page 3.
Reference 2, page 2, item b addresses possible undervoltage conditions on l
2.
the vital and instrument Ar systems.
An administrative limit of 345 kv at the switchyard has been set until corrective measures can be made.
Describe which corrective measures are planned and when they will be implemented.
Submit. the minimum pickup, maximum dropout, and continuous operation rating
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3.
of the 480-volt motor-control center contac. tors.
Submit the duration of the voltage d,epression addressed in Ref. 2, page 3, 4.
item c, due to the starting of 4160-volt loads.
Case 9 of Ref. 2 notes that starting the LOCA loads will cause a bus voltage transient on Bt If a 440-volt Class lE motor is started during this 12F of 351 volts.
interval, then the 50-volt drop due to this motor starting (Case No. 1)
This voltage will not will result in 301 volts at the motor terminals. Describe your procedures for preve start the motor.
What is the estimated time for electrical isolation of the 383 kv line and restoration of the RSST-1345 kv circuit for the scenat 'o detailed in 5.
Ref. 3, page 10?
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