ML20134K843
| ML20134K843 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 08/22/1985 |
| From: | Novak T Office of Nuclear Reactor Regulation |
| To: | Mazur D WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| RTR-REGGD-01.061, RTR-REGGD-1.061 TAC-84595, NUDOCS 8508300463 | |
| Download: ML20134K843 (3) | |
Text
August 22, 1985 DISTRIBUTION:..
eDocket No. 50-460; NRC PDR Docket No. 50-460 local PDR PRC System LB #4 r/f EAdensam Mr. D. W. Mazur MDuncan Managing Director DHood Washington Public Power Supply System RKirkwood P.O. Box 968 RBosnak 3000 George Washington Way Attorney, OELD Richland, Washington 99352 JPartlow EJordan
Dear Mr. Mazur:
BGrimes ACRS (16)
Subject:
Approval of ASME Code Case N-411 -
Washington Nuclear Project No. 1 By letter dated May 16, 1985, Mr. G. Sorensen requested NRC approval to apply ASME Code Case N-411 to WNP-1.
This Code Case provides alternate damping values for the seismic analyses of Class 1, 2, and 3 piping systems for use in lieu of values given in Table N-1230-1 of Section III of the Code and corre-sponding to those given in Regulatory Guide 1.61.
A subsequent letter from Mr. Sorensen dated August 5,1985, identified certain conditions and limita-tions which would be observed in using the Code Case.
These are:
- 1) " Multiple response spectra methodology is being used for piping system analyses. Time history methods will not be used in conjunction with the Code Case.
- 2) "The Code Case will be used for optimization of pipe supports (both re-design and new design) to satisfy seismic requirements. As mentioned in the reference [the May 16, 1985, letter], the Code Case will also be used to reconcile previous designs to avoid hardware modifications.
- 3) "For each analysis package where the Code Case is applied, the maximum displacements will be checked to verify adequate clearances exist with respect to adjacent structures, components, and equipment.
Pipe mounted equipment will also be verified to assure that the equipment can with-stand the increased pipe motion.
- 4) "For each analysis package (anchor group) where the Code Case is applied, the Code Case will be applied to the entire analysis.
Regulatory Guide 1,61 requirements will not be mixed with the alternate criteria of this Code Case.
5)
"The use of this Code Case with these clarifications will be documented in the next revision to the WNP-1 FSAR."
8508300463 850822 PDR ADOCK 05000460 P
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2 We fin'd that the request to apply ASME Code Case N-411 to WNP-1 in the manner specified in Mr. Sorensen's letters of May 16 and August 5,1985, is consistent with our plan to revise Regulatory Guide 1.61, and is, therefore, acceptable.
Sincerely,
/S/
Thomas M. Novak, Assistant Director for licensing Division of Licensing cc: See next page i
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e Mr. D. W. Mazur WPPSS Nuclear Project No.1 Washington Public Power Supply System (WNP-1) cc:
Mr. V. Mani Nicholas D. Lewis, Chairman United Engineers & Constructors, Inc.
State of Washington 30 South 17th Street Energy Facility Site Evaluation Philadelphia, Pennsylvania 19101 Council Mail Stop PY-11 Nicholas S. Reynolds, Esq.
Olympia, Washington 98504 Bishop, Liberman, Cook, Purcell and Reynolds 1200 Seventeenth Street, N.W.,
Mr. Eugene Rosolie Suite 700 Coalition for Safe Power Washington, D. C.
20036 Suite 527 408 South West Second Street Mr. E. G. Ward Portland, Oregon 97204 Senior Project Manager Babcock & Wilcox Company Nina Bell P.O. Box 1260 Nuclear Information and Resource Lynchburg, Virginia 23505 Service IJ46 Connecticut Avenue, N.W.
Resident Inspector /WPPSS NPS Pashington, D. C.
20036 c/o U.S. Nuclear Regulatory Comission P.O. Box 69 Richland, Washington 99352 Mr. R. B. Borsum Nuclear Power Generation Division Babcock & Wilcox 7910 Woodmont Avenue, Suite 220 Bethesda, Maryland 20814 G. E. Craig Doupe, Esq.
Washington Public Power Supply System P.O. Box 968 Richland, Washington 99352 Regional Administrator, Region V U.S. Nuclear Regulatory Commission, 1450 Maria Lane, Suite 210 Walnut Creek, California 94596
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