ML20212K981

Forwards Request for Addl Info Re Elimination of Arbitrary Intermediate Pipe Breaks at Facility.Info Necessary to Ensure That Findings in Evaluation Remain Appropriate & Valid

ML20212K981
Person / Time
Site:	South Texas
Issue date:	02/27/1987
From:	Kadambi N Office of Nuclear Reactor Regulation
To:	Goldberg J HOUSTON LIGHTING & POWER CO.
References
NUDOCS 8703100019
Download: ML20212K981 (4)

Text

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FEB 2 7 1987 Docket Nos. 50-498 and-50-499 _guscitet,luea Distributionm si ACRS(101 Mr. J. H. Goldberg NRC/l.ocal PDR MRushbrook.

Group Vice President, Nuclear PAD #5 Reading RPerch Houston I.ighting 8 Power HThompson NPKadambi P.O. Box 1700 OGC-Beth EJordan Houston, Texas 77001 BGrimes JPartlow Gray File 3.6a NThompson

SUBJECT:

RE00EST FOR ADDITIONAI. INFORMATION ON El.IMINATION OF ARBITRARY INTERMEDIATE PIPE BREAKS AT SOUTH TEXAS The NRC staff documented approval of eliminating arbitrary intermediate pipe breaks in the SER NUREG-0781 published in April 1986. By letter dated August

-78, 1986, you revised the technical bases upon which the staff based the previous evaluation. Enclosed is a request for additional information to ensure that the findings in the evaluation remain appropriate and valid.

Please inform me as soon as possible your schedule for providing the responses.

Sincerely, u.3 -

N. Prasad Kadambi, Project Manager PWR Project Directorate'No. 5 Division of PWR I.icensing-A

Enclosure:

As stated cc: See next page PAD #5:

bh PAD PKadambi:jch VSN 1an 7

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l 8703100019 870227 PDR ADOCK0500g8 A

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s eY Mr. J. H. Goldberg Houston I.ightino ard Power Company deuth Texas Pro.iect cc: _ .

Brian Ferwick, Esc ~. Resident Inspector / South Texas

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Assistant Attorney General Proiect Environmental Protection Divisior c/o 'J.S. Nuclear Regulatory Commission P. O. Box 12548 P. O. Pnx 910

' Capitol Station Bay City, Texas 77414 Austin, Texas 78711-Mr. Jonathan Cavis Mr. J. T. Westermeir Assistant City Attornev Manager, South Texas Profect City of Austin Houston t.iohtino and Power Company P. O. Box 1088 P. O. Box 1700 Austin, Texas 78767 Pouston, Texas 77001 Ms. Pat Coy Mr. H. I.. Peterson Citizens Concerned About Puclear Mr. G. Pokorny Power City of Austin 5106 Casa Oro P. O. Box 108P San Antonio, Texas 78233 Austin, Texas 78767 Mr. Mark R. Wisenbero Mr. J. B. Poston Manager, Nuclear I.icensino Mr. A. Von Rosenberg Houston I.ichtino and Power Compant City Public Service Boad P. O. Box 1700 P. O. Box 1771 Houston, Texas 77001 San Antonio, Texas 78296 Mr. Charles Pallican Jack R. Newman, Eso. Mr. Burton I.,i.ex Newman & Poltzinoer, P.C. Bechtel Corporation 1615 1. Street, NW P. O. Pox 2166 Washington, D,C, 20036 Houston, Texas 77001 Melbert Schwartz, Jr., Eso. Mr. E. R. Brooks Paker & Botts Mr. R. l. Rance One Shell Plaza Central Power and I.ight Company Houston, Texas 7700? P. O. Box 212?

Corpus Christi, Texas 78403 Mrs. Peggy Buchorn Executive Director Citizens for Eouitable Utilities, Inc.

Route 1, Box 1684 Brazoria, Texas 774??

.31 '

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~ Houston I.ightinc & Power Company- -South Texas Proiect CC' Recional Administrator, Pecion IV U.S.' Nuclear Reaulatory Commission Office of Executive ~ Director for Operations 611 Ryan Plaza Drive, Suite 1000

-Arlington, Texas 76011 Mr. I.anny Sinkin,

. Counsel for'Intervenor Citizens Concerned.ahout Nuclear Power, Inc.

'Christic Institute

.1324 North Capitol Street -

Washincton, D.C. 70002 1.icensing Representative Houston't.iahtino and Power Company

,. Suite 1309

-7910 Woodmont Avenue Rethesda, Maryland P0814 f

Enclosure

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In your letter dated August 28 intermediate pipe breaks, you p,roposed to revise your previous commitnent t l control locations of- welded attachments in the vicinity of arbitrary intermediate breaks. It is necessary to determine that the level of safety against pipe breaks in the vicinity of welded attachments to piping is equivalent to that provided for in the Standard Review Plan, Section 3.6.2.

It is requested that more detailed information be provided concerning the use of welded attachments in the vicinity of those arbitrsry intermediate breaks to be eliminated. Specifically, the staff requests that you:

a. .

Identify. all welded pipino attachments within five pipe diameters of the arbitrary intermediate break to be eliminated.

b.

For each welded attachment, identified in Iai above, provide the system, stress package number, piping isometric drawing number, pipe support number, building location, and pipe stress levels at the welded attachment.

c. Provide a sketch of the piping configuration in the area near the welded attachment and arbitrary intermediate break location.

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d.

Describe the type of welded attachment involved (e.g. lug, stanchion, trunnion) and provide a sketch of the welded attachment and support arrangement.

e. For those systems susceptible to large, unanticipated dynamic loads (e.g. main steam and feedwater), provide an assessment of the weak link in the piping to pipe support load path.

It is further requested that a description of all piping lines (including line designators) for which arbitrary intermediate breaks will be eliminated be provided in the FSAR to ensure a complete and documented list.

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