ML17054B547

Forwards Approved ASME Code Case N-413, Min Size of Fillet Welds for Linear Type Supports,Section Iii,Div I,Subsection Nf, Per 850225 Request.Case Code N-413 May Be Used at Facility for Linear Type Supports W/Stated Limitations

ML17054B547
Person / Time
Site:	Nine Mile Point
Issue date:	04/02/1985
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Hooten B NIAGARA MOHAWK POWER CORP.
References
NUDOCS 8504120362
Download: ML17054B547 (8)

Text

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]985 Docket No. 50-410 Mr. B. G. Hooten Executive Director, Nuclear Operations Niagara Mohawk Power Corporation'00 Erie Boulevard West

Syracuse, New York '3202

SUBJECT:

USE OF ASME CODE'CASE N-413 FOR THE NINE MILE POINT NUCLEAR STATION, UNIT 2 In Niagara Mohawk Power Corporation's letter dated February 25, 1985, a request was made for authorization to use ASME Code Case N-413, "Minimum Size of Fillet Welds for Linear Type Supports,Section III, Division 1, Subsection NF" for Nine Mile Point 2.

Code Case N-413 was approved by the ASME Boiler and Pressure Vessel Coomittee at the November 1984 meeting in New York City.

A copy of the final version of the Code Case as approved during the November 1984 meeting is enclosed.

Code Case N-413 has been reviewed by the NRC staff and is acceptable as written with no additional requirements other than those specified in the Code Case.

Earlier versions of the Code Case should not be used.

The Code Case is expected to be endorsed by the NRC staff in a future revision of Regulatory Guide 1.84, "Design and Fabrication Code Case Acceptability ASME Section III, Division 1."

Code Case N-413 may therefore be used at Nine Mile Point Unit 2 for linear type supports within the limitations stated in the "Inquiry" and "Reply" sections of the Code Case.

Use of the Code Case should be documented in a future Amendment to the Final Safety Analysis Report.

If you have any questions regarding this matter, please contact A. Bournia, Project

Manager, (301) 492-8535.

Sincerely, poR Avoca asoozo~eR<

A

Enclosure:

As stated cc:

See next page

~efoal signed by:

A. Schwencer, Chief Licensing Branch No.

2 Division of Licensing Distribution:

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)fp*~4 Docket No. 50-410 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 AI'N OIg I>UD Mr. B.

G. Hooten Executive Director, Nuclear Operations Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202

Dear Mr. Hooten:

SUBJECT'SE OF ASME CODE CASE N-413 FOR THE NINE MILE POINT NUCLEAR STATION, UNIT 2 In Niagara Mohawk Power Corporation's letter dated February 25,

1985, a request was made for authorization to use ASME Code Case N-413, "Minimum Size of Fillet Welds for Linear Type Supports,Section III, Division 1, Subsection NF" for Nine Mile Point 2.

Code Case N-413 was approved by the ASME Boiler and Pressure Vessel Committee at the November 1984 meeting in New York City.

A copy of the final version of the Code Case as approved during the November 1984 meeting is enclosed.

Code Case N-413 has been reviewed by the NRC staff and is acceptable as written with no additional requirements other than those specified in the Code Case.

Earlier versions of the Code Case should not be used.

The Code Case is expected to be endorsed by the NRC staff in a future revision of Regulatory Guide 1.84, "Design and Fabrication Code Case Acceptability ASME Section III, Division 1."

Code Case N-413 may therefore be used at Nine Mile Point Unit 2 for linear type supports within the limitations stated in the "Inquiry" and "Reply" sections of the Code Case.

Use of the Code Case should be documented in a future Amendment to the Final Safety Analysis Report.

If you have any questions regarding this matter, please contact A. Bournia, Project

Manager, (301) 492-8535.

Sincerely,

Enclosure:

As stated cc:

See next page A. Schwencer, Chief Licensing Branch No.

2 Division of Licensing

A

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

& 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 Jay M. Gutierrez, Esq.

U. S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Norman Rademacher, Licensing Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202

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Annex 84"6]6 MC 84-480 N84-043 Case N-413 Minimum Size of Fillet Welds for Linear Type SupportsSection III, Division 1, Subsection NF Inquiry May the fillet or partial penetration weld sizes specified in design documents be less than those specified in Subsection NF, Table NF-3324.5(d),

and Appendix XVIII, Table XVII-2452.1-1 provided the stress limits are not exceeded?

~Rep1 It is the opinion of the Committee that, until the referenced tables are removed from the code, fillet and partial penetra-tion weld sizes smaller than the sizes listed in Subsection NF, Table NF-3324.5(d)-l, and Appendix XVIII, Table XVII-2452.1-1 are permitted, provided that, when considering the limiting design or service loadings of the Design Specification, the allowable limits of Table NF-3324.5(a)(1) are met, and the weld size is specified on the design drawings.

This Code Case number shall be listed on the documentation for the support.

603

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