ML20126B106

Grants 850412 Request for Authorization to Use ASME Code Case N-411 for Application in Response to Spectrum Seismic Analysis of Piping Sys at Plant.Subsequent Amend to FSAR Reflecting Change Approved

ML20126B106
Person / Time
Site:	South Texas
Issue date:	05/24/1985
From:	Novak T Office of Nuclear Reactor Regulation
To:	Goldberg J HOUSTON LIGHTING & POWER CO.
References
NUDOCS 8506130577
Download: ML20126B106 (4)

Text

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Docket Nos.: 50-498 and 50-499 Mr. J. H. Goldberg Group Vice President - Nuclear Houston Lighting and Power Company Post Office Box 1700 Houston, Texas 77001

SUBJECT:

USE OF ASME CODE CASE N-411 FOR THE SOUTH TEXAS PROJECT UNITS 1 AND 2 Your letter of April 12, 1985 (Serial No. ST-HL-AE-1196) requested authorization to use ASME Code Case N-411 for application in the response spectrum seismic analysis of piping systems at the South Texas Project Units 1 and 2. The staff has reviewed your request and hereby grants it subject to the discussion which follows.

Code Case N-411, " Alternative Damping Values for Seismic Analysis of Piping,Section III, Division I, Class 1, 2 and 3 Construction" is a conditionally acceptable Code Case and is approved by the staff for specific plant applications pending revision of Regulatory Guide 1.61. Utilities wishing to use this Code Case shall submit in their request the following information or commitments:

(a) Commit to use the case for piping systems analyzed by response spectrum methods and not those using time-history analysis methods.

(b) Indicate if the case is to be used for new analyses or for reconciliation work and for support optimization.

(c) Due to the increased flexibility of the system commit to check all system predicted maximum displacements for adequate clearance with adjacent structures, components and equipment, and that the mounted equipment can withstand the increased motion.

(d) When th alternate damping criteria of this Code Case are used, they will be used in their entirety in a given analysis and shall not be a mixture of Regulatory Guide 1.61 criteria and the alternate criteria of this Code Case.

8506130577 850524 PDR A ADOCK 05000498 pg m

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South Texas Mr. J.~H. Goldberg -

William S. Jordan, III, Esq.

Group Vice President, Nuclear Harmon, Weiss & Jordan 1

Houston Lighting and Power Company 2001 S Street, N.W.

P. O. Box 1700 Suite 430 Houston, Texas 77001 Washington, D. C. 20009 Brian Berwick, Esq.

Mr. J. T. Westermeir Assistant Attorney General Manager, South Texas Project Environmental Protection Division Houston Lighting and Power Company P. O. Box 12548 P. O. Box 1700 Capitol Station Houston, Texas .77001 Austin, Texas 78711 Mr. E. R. Brooks Mr. Claude E. Johnson, Resident Mr. R. L. Range Inspector / South Texas Project Central Power and Light Company c/o U. S. NRC P. O. Box 2121 P. O. Box 910 Corpus Christi, Texas 78403 Bay City, Texas 77414 Mr. H. L. Peterson Mr. Jonathan Davis Mr. G. Pokorny Assistant City Attorney City of Austin City of Austin P. O. Box 1088 P. O. Box 1088 Austin, Texas 78767 Austin, Texas 78767 Mr. J. B. Poston Mr. A. Von Rosenberg Ms. Pat Coy City Public Service Board Citizens Concerned About Nuclear P. O. Box 1771 Power San Antonio, Texas 78296 5106 Casa Oro San Antonio, Texas 78233 Jack R. Newman, Esq.

Newman & Holtzinger, P.C. Mr. Mark R. Wisenberg 1615 L Street, NW Manager, Nuclear Licensing l Washington, DC 20036 Houston Lighting and Power Company l P. O. Box 1700 l Melbert Schwartz,Jr. , Esq. Houston, Texas 77001 Baker & Botts One Shell Plaza Mr. Charles Halligan

• Houston, Texas 77002 Mr. Burton L. Lex Bechtel Corporation Mrs. Peggy Buchorn P. O. Box 2166 Executive Director Houston, Texas 77001

, Citizens for Equitable Utilities, Inc.

Route 1, Box 1684 ,

Brazoria, Texas 77422 l'

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Regional Administrator Region IV U. S. Nuclear Regulatory Comission 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011 Mr. Lanny Sinkin Citizens Concerned About Nuclear Power 3022 Porter St. N. W. #304 Washington, D..C. 20008 Mr. S. Head HL&P Representative Suite 1309 7910 Woodmont Avenue Bethesda, Maryland 20814 D

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' HL&P has complied with these commitments in the letter of April 12, 1985.

Therefore, since the commitments with respect to Code Case N-411 are documented in the referenced letter, the staff finds your request to use Code Case N-411 to be acceptable for use at South Texas Projects Units 1 and l 2 in the response spectrum seismic analysis of piping systems. The staff also l approves reflecting this change in a subsequent amendment to the FSAR, as stated in your letter.

Sincerely, 1

Thomas M. Novak, Assistant Director for Licensing Division of Licensing cc: See next page DISTRIBUT10N eDocket File 60!498/499"- ~~

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