ML19338C541
| ML19338C541 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/31/1980 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Counsil W NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| NUDOCS 8008180107 | |
| Download: ML19338C541 (2) | |
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I July 31,1980 Docket No. 50-245 e
i Mr. W. G. Counsil, Senior Vice President i
Nuclear Engineering and Operations Northeast Nuclear Energy Cocoany P. O. Box 270
/
Hartford, Connecticut 00101
Dear Mr. Counsil:
By letter dated June 27, 1980, you have provided responses to seven questions that we posed relative to the Low Pressure Coolant Injection (LPCI) flow split method: logy for Millstone Nuclear Power Station, Unit N o. 1.
To continue our r aview, the following additional information, keyed to the numbers in your letter, is requested:
4.
On the response to our question numbered 4, please explain the fornulation for LPCI shutoff head from the SAFE Code.
Is this enpirically based from system pressure characteristics?
5.
The term W should be W-in the fornulation of equation (ii) as it was kn equation 4 bf your April 16, 1980 letter response to our initial questions. This changes the final fornulation substantially.
1 Also, in the equation for W,, the sign of the denominator appears to be incorrect based on thh algebraic manipulation of ghe previous equation, i.e. the denominator should be [(K /288 gy AE ) - B].
e We note that the modeling of LPCI flow split seems to adversely affect Millstone's operational flexibility, i.e. decreased MAPLHGR limits. Please provide your reasoning for your request to review the LPCI flow split calcu-lational model at this time. We are interested in greater calculational accu racy.
S ncerely, Dennis M. Crutchfield, Chir Operating Reactors Branch i Division of Operating Reactors cc: See next page l 8 0 0 818 0LD3
Mr. 'W. G. Counsil 2-July 31,1980 1
cc:
1 William H. Cuddy, Esquire Connecticut Energy Agency Day, Berry & Howard ATTN: Assistant Director l
Ccunselors at Law Research and Policy 000 Ccnstitution Plaza Development Hartford, Connecticut 06103 Department of Planning and Energy Policy Natural Resources Defense Council 20 Grand Street 91715th Street, N. W.
Hartford, Connecticut 06106 l
Washington, D. C.
20005 i
Director, Technical Assessment Division Nartheast Nuclear Energy Conpany Office of Radiation Programs ATTN: Superintendent (AW-459)
Millstone Plant U. S. Environmental Protection P. O. Box 128 Agency Waterford, Connecticut 06385 Crystal Mall #2 Arlington, Virginia 20460 Mr. Janes R. Himmelwright Northeast Utilities Service Cocpany U. S. Environnental Protection P. O. Box 270 Agency Hartford, Connecticut 06101 Region 1 Office ATTN: EIS C0ORDINATOR Resident Inspector JFK Federal Building c/o U. S. NRC Boston, Massachusetts 02203 P. O. Box Drawer KK Niantic, Connecticut 06357 Waterford Public Library Rcpe Ferry Road, Route 156 Waterford, Conrecticut 06385 First Selectman of the Town cf Waterford Hall of Reccrds 200 Boston Post Road Waterford, Connecticut 06385 Jo e F. 6peka l
Systens 51perintendent Northeast Utilities Service Cocpany P. O. Box 270 Hertford, Connc:ticut 06101 y
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