ML20006A612
| ML20006A612 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 01/22/1990 |
| From: | Boyle M Office of Nuclear Reactor Regulation |
| To: | Mroczka E CONNECTICUT YANKEE ATOMIC POWER CO. |
| References | |
| GL-89-16, TAC-74872, NUDOCS 9001290202 | |
| Download: ML20006A612 (2) | |
Text
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anuay 22, im Do,cht No'. 50-245 Mr. Edward J. Mroczka Senior Vice President i
' Nuclear Engineering and Operations Connecticut Yankee Atomic. Power Company Northeast Nuclear Energy Company P. O. Box 270 Hartford, Connecticut 06141-0270
Dear Mr. Mroczka:
I
SUBJECT:
REVIEW 0F RESPONSE TO GENERIC LETTER 89-16, HARDENED WETWELL VENT -
i tulLSTONE NUCLEAR POWER STATION, UNIT NO. 1 (TAC N0. 74872)
By letter dated October 30, 1989, Northeast Nuclear Energy Company (NNECO) responded to the request for information regarding hardened:wetwell vents in Generic Letter 89-16.
In that letter, NNEC0 stated that it would not at that time commit to make voluntary modifications to harden the wetwell vent.
NNECO indicated that additional analysis would be required to substantiate
+
reduction in core melt frequency and that evaluation in the Integrated Safety'
(
Assessment Program process would be utilized to develope the-implementation priority for any justifiable modifications.
In addition, NNEC0 stated that it.
will be working with the BWR Owners Group to develop general design criteria
,I for a hardened wetwell vent.
Plant-specific design details, if warranted, will be developed in parallel with the Individual Plant Evaluation.
It was stated that NNECO's intent would be to complete the installation of a hardened wetwell vent, if warranted, within approximately 3 years. Because no comt twent was made to voluntarily install a hardened wetwell vent, NNECO provided prelirainary l
cost estimates for the installation.
i As noted in Generic Letter 89-16, since NNEC0 has not made a comitment to install a hardened wetwell vent on a voluntary basis, the staff will complete a plant-specific backfit analysis for Millstone Unit 1.
If the completed analysis supports the conclusion that modifications to the wetwel3 vent meet e
the requirements of the NRC backfit rule, a copy of our analysis will be sent to you to provide you with another opportunity to make the requisite modifications under the provisions of 10 CFR 50.59.
i If your cut rent position on this issue differs from that stated in your October 30, 1989, letter or if our understanding of your position is not accurate, please provide any necessary clarifications within 30 days of receipt of this letter.
J Sincerely,
/s/
Michael L. Boyle, Senior Project Manager 9001290202 9001 h, Project Directorate I-4 ADOCK 0500 f,DR p
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.i Mr. Edward J. Mroczka-Millstone Nuclear power Station Northeast Nuclear Energy Company Unit ho. I cC' Gerald Garfield, Esquire R. M. Kacich, Manager Day, '6erry and Howard Generation Facilities Licensing Counselors at Law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W
D. Romberg, Vice President D. O. Nordquist Nuclear Operations Manager cf Quality Assurance Northeast Utilities Service Company Northeast Nuclear Energy Company Post Office Box 270 Post Office Box 270 Partford, Connecticut 06141-0270'
-Hartford, Connecticut _06141-0270 Kevin McCarthy. Director Regional Administrator Radiatior Control Unit Pegion I Department of Environmertal Protectinn U. S. Fuclear Regulatory Coninission State Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 7
Bradford S. Chase, Under Secretary First Selectmen Energy Division Town of Waterford Office of Policy and Management Hall of Records.
80 k'ashington Street 200 Boston Ptst Road-Hartford, Connecticut OG106 liaterford, Connecticut 06385 S. E. Scace, Station Superintendent W. J. Raymond, Resident Inspector Hillstone Nuclear Power Station Millstone Nuclear Power Station Northeast Uuclear Energy Company c/o U. S. Nuclear Regulatory Coninission Post Office Box 128 Post Office Box 811 Waterford, Connecticut 06385 Niantic, Cennecticut 06357 J. P. Stetz, Unit Superintendent Millstone Unit No. 1 Mortheast Nuclear Energy Company Post Office Box 128 Waterford, Connecticut 06385
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