ML20033B163

Discusses Evaluation by Bnwl to Verify That Main Steam Piping Sys Meets ASME Code Stress Criteria & Vendor Allowables.Info Required for 811204 Site Visit Listed

ML20033B163
Person / Time
Site:	Seabrook
Issue date:	11/06/1981
From:	Miraglia F Office of Nuclear Reactor Regulation
To:	Tallman W PUBLIC SERVICE CO. OF NEW HAMPSHIRE
References
NUDOCS 8111300492
Download: ML20033B163 (3)

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6 1981

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William C. Tallman 3,9 Chiaman and Chief Executive Officer (2,

y. 'D N,Ap Public Service Company of New Hanpshire

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P. O. Box 330

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lianchester, New Hampshire 03105 h,

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Subject:

Confirmatory Piping Analysis The NRC staff has instituted a program of performing an independent confirmatory piping analysis for plants undergoing OL review.

For the Seabrook Station, this analysis will be performed by contract personnel at Pacific Northwest Laboratory.

The purpose of this indepandent analysis is to verify that I

the subject piping system meets the applicable ASt1E Code stress criteria and I

vendor allowables.

The staff dcrs not intend to resolve differences between its calculated stresses and loads and those of the applicant unless Code criteria or vendor allowables are not satisfied.

This program allows verification, on a sampling basis, that the applicant has met the ASME Code requirements, has met vendor interface requirements, and has adequately incorporated the NRC regulatory guides and review plans into the plant des 1gn.

To proceed with the analysis, the staff will require certain information to be supplied by the applicant.

The staff has scheduled a site visit for December 4,1981 so that lab personnel may adquaint themselves with the plant and view the chosen piping system.

The applicant should have the below requested information available at the site during tne visit. At that time, the staff can discuss the piping analysis with the applicant's design engineers and decide whether any additional infomation is necessary.

The staff has previnsly used this approach on other plants and found it useful.

The applicant should have two copies of the following infonnatioh available nm for the sf te visit to the Seabrook plant:

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Piping analytical and isometric drawings sufficient to model the system

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Support drawings 3.

The piping system design specification x4 4.

Valve weights and CG's o"

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Appropriate response spectra g*

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Appropriate anchor point movements (thermal and seismic)

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Any design change notices not yet incorporateo into the piping or l

n support drawings (later DCN's should be forwarded as received) l

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Applicable equipment allowable loads 9.

Piping and instrumentation diagrams (P&ID's) for the system

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The selected piping system for Seabrook is the main steam piping including the sr.fety and relief valves.

The findings of the analysis will be incorporated into the Safety Evaluation Report.

Sincerely, rCriginalSign dby li Track J 81#"8 Frank J. Miraglia, Chief Licensing Branch No. 3 Division of Licensing cc: See next page.

DISTRIBUTION:

Docket File 50-443/444 LPDR PDR NSIC TERA LB#3 Files FJMiraglia LLWhealer RJBosnak DTerao ACRS(16)

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SEtak00K William C. Tallman Chainnan and Chief. Executive Officer Public Service Company of New Hampshire P. O. Box 330 i

Manchester, New Hampshire 03105.

John A. Ritscher, Esq.

E. Tupper Kinder, Esq.

Ropes and Gray Assistant Attorney General 225 Franklin Street Office of Attorney General 80ston, Massachusetts 02110 /

208 State House Annex Concord, New Hacpshire 03301 Mr. Bruce b. Beck. ley, Project Manager Public Service Company of New Hampshire The Honorable Arnold Wight -

P. O. Box 330 New Hampshire House of Representatives Manchester, New Hampshire 03105 -

Science, Technology and Energy Comittee State House G. Sanborn Concord, New Hampshire 03301 U. S. NRC - Region I 631 Park Avenue Resident Inspector King of Prussia, Pennsylvania 19406 ^

Seabrook Nuclear Power Station.

c/o U. S. Nuclear Regulatory. Commission Ms. Elizabeth H. Weinhold P. O. Box 700 3 Godfrey Avenue Seabrook, New Hampshire 03874 -

Hampton, New Hampshire 03842 v y

Robert A. Backus, Esq.

Mr. John DeVincentis, Project Manager Yankee Atomic Electric Company

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O'Neill, Backus and Spielman 1671 Worcester Road 116 Lowell Street Farmingham, Massachusetts 01701 -

Manchester, New Hampshire 03105 <

Mr. G. F. Cole, Project Manager Norman Ross, Esq.

United Engineers and Constructors v 30 Francis Street 30 South 17th Street Brookline, Massachusetts 02146.

Post Office Box 8223 Philadelphia, Pennsylvania 19101 Karin P. Sheldon, Esq.

Sheldon, Harmon & Weiss Mr. W. Wright, Project Manager 1725 1 Street, N. W.

Westinghouse Electric Corporation Washington, D. C.

20006 Post Office Box 355 Pittsburg, Pennsylvania 15230 -

Laurie Burt, Esq.

Office of'the Assistar,i Attorney General Thomas Dignan, Esq.

Environmental Protection Division Ropes and Gray One Ashburton Place 225 Franklin Street Boston, Massachusetts 02108 -

Boston, Passachusetts 02110 D. Pierre G. Cameron, Jr., Esq.

General Counsel Public Service Company of New Hampshire P. O. Box 330 Manchester, New Hampshire 03105..