ML17055C915
| ML17055C915 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 03/23/1987 |
| From: | Adensam E Office of Nuclear Reactor Regulation |
| To: | Mangan C NIAGARA MOHAWK POWER CORP. |
| References | |
| NUDOCS 8703270323 | |
| Download: ML17055C915 (6) | |
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March 23, 1987 Docket No. 50-410 Mr. C. V. Mangan, Senior Vice President Niagara Mohawk Power Corporation 301 Plainfield Road
- Syracuse, New York 13212 DISTRIBUTION:
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NRC PDR Local PDR BWD-3 r/f EAdensam MHaughey EHylton RBernero
SMinor
Dear Mr. Mangan:
Subject:
Main Steam Isolation Valve License Amendment Request We have reviewed your request for a license amendment to reflect the change from ball valves to wye pattern alobe valves for the Main Steam Isolation Valves (MSIVs) for Nine Mile Point Unit 2 as requested in your letters of March 11 and 16, 1987.
We find that in order to support a no significant hazards consider-ations determination on this change, additional information as identified in the enclosure is required.
We request that Niagara Mohawk expeditiously review and respond to this request for additional information as soon as practicable so that a notice of our findings can be published in a.timely manner.
If you have any questions concerning the enclosure please contact the Licensing Project Manager, Mary Haughey on (301) 492-9422.
Sincerely,
/S/
Enclosure:
As Stated Elinor G. Adensam, Director BWR Project Directorate No.
3 Division of BWR Licensing cc:
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ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION ON MSIV AMENDMENT REQUEST I)
Is pneumatic assist required to close the new MSIVs in accordance with, Technical Specification requirements?
If so, provide details of the system (e.g. design, qualifications) and explain why a loss of air or nitrogen would not create the possibility of a new or different kind of an accident, increase the probability or consequences of an accident previously evaluated or involve a significant reduction in a margin of safety.
2)
What are the differences in the way the ball valves operate versus the way the wye-pattern globe valves operate (e.g. flow characteristics)?
Why are there no new kinds of accidents associated with these changes?
3)
Provide an analysis of why the change to the-MSIV closure setpoint change does not create the possibility of a new or different kind of accident from any accident previously evaluated.
4)
Other than no change in the critical power ratio, what is the basis for deter-mining there is no significant reduction in any margin of safety resulting from the MSIV closure setpoint change?
5)
What are the changes in the margins of safety for the manual closure of all MSIVs and the pressure regulator controller failure transients as a result of the MSIV closure setpoint change?
6)
What are the changes in margins of safety for the change from ball to wye pattern globe valves; how were they determined; and how was it determined that there were no others?
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>P f f +Cf 1 II' pl pff h gf i f 'P<C r ~ < Cp "p>> ar p lj( -, 'r "t I" I '%l, "'f p Ir '>><> p I r>> )>>) f I(> f p f,jl r ff ) I 'p'I p lf P>>* ppf>> p "y~k ff C>>c'p' fff PC, ~ "I, trf<f f lf'p fI,I >>III, CP Mr. C. V. Mangan Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit 2 CC: Mr. Troy B. Conner, Jr., Esq. Conner 5 Wetterhahn Suite 1050 1747 Pennsylvania
- Avenue, N.W.
Washington, D.C. 20006 Richard Goldsmith Syracuse University College of Law E. I. White Hall Campus
- Syracuse, New York 12223 Ezra I. Bialik Assistant Attorney General Environmental Protection Bureau New York State Department of Law 2 World Trade Center New York, New York 10047 Resident Inspector Nine Mile Point Nuclear Power Station P. 0.
Box 99
- Lycoming, New York 13093 Mr. John W. Keib, Esq.
Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202 Mr. James Linville U. S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. Peter E. Francisco, Licensing Niagara Mohawk Power Corporation 301 Plainfield Road
- Syracuse, New York 13212 Don Hill Niagara Mohawk Power Corporation Suite 550 4520 East West Highway
- Bethesda, Maryland 20814 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. Paul D.
Eddy New York State Public Serice Commission Nine Mile Point Nuclear Station-Unit II P.O. Box 63
- Lycoming, New York 13093 Mr. Richard M. Kessel Chair and Executive Director State Consumer Protection Board 99 Washington Avenue
- Albany, New York 12210
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