ML093130067

Schedule for Performing Material Stress Improvement Process for Pressurizer Connections

ML093130067
Person / Time
Site:	Watts Bar
Issue date:	11/04/2009
From:	Bajestani M Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML093130067 (4)

Text

Tennessee Valley Authority, Post Office Box 2000, Spring City, TN 37381-2000 November 4, 2009 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Stop: OWFN P1-35 Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 2 NRC Docket No. 50-391

Subject:

SCHEDULE FOR PERFORMING MATERIAL STRESS IMPROVEMENT PROCESS FOR PRESSURIZER CONNECTIONS The purpose of this letter is to provide the schedule for performing Material Stress Improvement Process (MSIP) for the WBN Unit 2 pressurizer connections. This activity is currently scheduled to start on January 18, 2010, with a two week duration. TVA expects to perform MSIP on the vessel connections later in 2010.

To ensure this activity could be performed under the rules of ASME Section III construction, TVA's contractor responsible for ASME issues, M. N. Bressler, P.E., Inc., requested an interpretation from ASME. Enclosure 1 provides the ASME question and affirmative reply concerning the use of stress improvement techniques under ASME Section III.

If you have any questions, please contact me at (423) 365-2351.

Sincerely, Masoud a' stani Watts B#nit 2 Vice President

Enclosure:

Enclosure 1 - ASME inquiry and reply cc: See page 2 Printed on recycled paper

U.S. Nuclear Regulatory Commission Page 2 November 4, 2009 cc (Enclosure):

U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303-8931 NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant 1260 Nuclear Plant Road Spring City, Tennessee 37381

Enclosure 1 ASME Inquiry and Reply

Three Park Avenue tel 1.212.591.8500 New York, NY fax 1.212.591.8501 SITrims THE SrAMDAND 10016-5990 U.S.A. www.asme.oTg CODES & STANDARDS August 20, 2009 Marcus N. Bressler, PE President MN Bressler, P.E., Inc.

13508 King Lake Trl Broomfield, CO 80020-8141 ASME File: 09-1291

Reference:

Your letter dated August 6, 2009

Subject:

BPV Section III, Division 1, NCA-4134.9 Control of Processes

Dear Mr. Bressler,

Our understanding of the question in your inquiry, and our replies, are as follows:

Question: May special processes (such as stress improvement techniques) that are not specifically addressed in Section III be performed under the rules of Section UI construction?

Reply: Yes, provided the controls of NCA-4134.9 and the Code are met.

Very truly yours, Christian Stona Secretary, BPV Standards Committee on Construction of Nuclear Facility Components (III) sannac(*asme.orm

+1-212-591-8513 ASME procedures provide for reconsideration of this interpretation when or if additional information is available which the inquirer believes might affect this Interpretation. Further, persons aggrieved by this interpretation may

,appeal to the cognizant ASME committee or subcommittee. As stated In the foreword of the code documents, ASME does not "approve," 'certify' 'rate,' or 'endorse" any Item, construction, proprietary device or activity.