ML17054B343
| ML17054B343 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 01/22/1985 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Hooten B NIAGARA MOHAWK POWER CORP. |
| References | |
| RTR-REGGD-01.061, RTR-REGGD-1.061 NUDOCS 8501280704 | |
| Download: ML17054B343 (6) | |
Text
~P'ocket No. 50-410 Mr. B.
G. Hooten Executive Director, Nuclear Operations Niagara Mohawks Power Corporation 300 Erie Boulevard Hest
- Syracuse, New York 13202
Dear Mr. Hooten:
ll p
In a letter to A. Schwencer, NRC, from'C.
V,. Mangan, flMPC (October ll, 1984), Mr. Mangan requested NRC approVal for use of the Pressure Vessel Research Committee (PVRC) recommended damping criteria in the r'esponse spectrum seismic analysis ot piping for Nine Mile"Point 2.
The 'letter further stated that this damping criteria will 'be used as an alternative to the values given in Regulatory Guide 1.61, will only be used when necessary to resolve design or as-built verification items, and,'hen used, this new criteria will be applied in its entirety to both, the operating basis earthquake and the safe shutdown earthquake analyses.
Prior to completing our review of this issue the following additional commitments are needed:
1.
The new damping values should be identified as those contained in ASME Code Case N-411 rather than the PVRC recommended damping criteria.
2.
If, as a result of using the damping values in ASME Code Case N-411, piping supports are moved, modified or eliminated, the expected increased piping displacements resulting from greater piping flexi~
bility will be checked to ensure that they can be accommodated and that there will be no adverse interaction with adjacent structures, components and equipment.
If you have any questions on the above information please contact the licensing project manager, Mary Haughey (301)-492-7897.
A. Sch'wencer, Chief Licensing Branch No.
2 Division of Licensing cc:
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Docket No. 50-410 JAN 22 1885 Mr. B. 6. Hooten Executive Director, Nuclear Operations Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202
Dear Hr. Hooten:
In a letter to A. Schwencer, NRC, from C. V. Mangan, NMPC (October 11, 1984), Hr.. Mangan requested NRC approval for use of the Pressure Vessel Research
.COIImIigtge. (PVRC) recommended damping criteria in the response spectrum seismi'c analysis of piping for Nine Mile Point 2.
The letter further stated that this damping criteria will be used as an alternative to the values given in Regulatory Guide 1.61, will only be used when necessary to resolve design or as-built verification items,
- and, when used, this new criteria will be applied in its entirety to both the operating basis earthquake and the safe shutdown earthquake analyses.
Prior to completing our review of this issue the following additional commitments are needed:
1.
The new damping values should be identified as those contained in ASME Code Case N-411 rather than the PVRC recommended damping criteria.
2.
If, as a result of using the damping values in ASME Code Case N-411, piping supports are moved, modified or eliminated, the expected increased piping displacements resulting from greater piping flexi-bility will be checked to ensure that they can be accommodated and that there will beno adverse interaction with adjacent str uctures, components and equipment.
If you have any questions on the above information please contact the licensing project manager, Mary Haughey (301)-492-7897.
A. Schwencer, Chief Licensing Branch No.
2 Division of Licensing cc:
See next page
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Nine Mile Point 2
Mr. B. G. Hooten Executive Director, Nuclear Operations Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202 CC:
Mr. Troy B. Conner, Jr.,
Esq.
Conner 8 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 ResideRt 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 Jay M. Gutierrez, Esq.
U. S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsy1vania 19406 Norman Rademacher, Licensing
'Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202
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