ML062290496

RAI, Relief Request G-RR-1 - Preemptive Weld Overlays on Alloy 600 Pressurizer Nozzle-to-Pipe Weld Overlays

ML062290496
Person / Time
Site:	Watts Bar, Sequoyah
Issue date:	08/29/2006
From:	Pickett D NRC/NRR/ADRO/DORL/LPLII-2
To:	Singer K Tennessee Valley Authority
Pickett, D V, DORL/LPLII-2, 415-1364
References
TAC MD2381, TAC MD2382, TAC MD2383
Download: ML062290496 (4)

Text

August 29, 2006 Mr. Karl W. Singer Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801

SUBJECT:

SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 AND WATTS BAR NUCLEAR PLANT UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION RE: RELIEF REQUEST G-RR PREEMPTIVE WELD OVERLAYS ON ALLOY 600 PRESSURIZER NOZZLE-TO-PIPE WELD OVERLAYS (TACS NOS. MD2381, MD2382, MD2383)

Dear Mr. Singer:

By letter dated June 16, 2006, Tennessee Valley Authority submitted Relief Request G-RR-1 requesting approval for use of alternatives to the requirements of the American Society of Mechanical Engineers Code,Section XI, for the specified Edition and Addenda, Article IWA-4000, for repair and replacement activities related to the performance of preemptive weld overlays, and/or needed weld overlay repairs at the Sequoyah Nuclear Plant, Units 1 and 2 and the Watts Bar Nuclear Plant, Unit 1.

As part of our review, the staff has identified the enclosed Request for Additional Information which will be necessary in order to complete our review. Based on discussions with your staff, we will expect your response by approximately September 18, 2006.

Sincerely,

/RA/

Douglas V. Pickett, Senior Project Manager Project Directorate II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-327, 50-328, 50-390

Enclosure:

As stated cc w/enclosure: See next page

August 29, 2006 Mr. Karl W. Singer Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801

SUBJECT:

SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 AND WATTS BAR NUCLEAR PLANT UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION RE: RELIEF REQUEST G-RR PREEMPTIVE WELD OVERLAYS ON ALLOY 600 PRESSURIZER NOZZLE-TO-PIPE WELD OVERLAYS (TACS NOS. MD2381, MD2382, MD2383)

Dear Mr. Singer:

By letter dated June 16, 2006, Tennessee Valley Authority submitted Relief Request G-RR-1 requesting approval for use of alternatives to the requirements of the American Society of Mechanical Engineers Code,Section XI, for the specified Edition and Addenda, Article IWA-4000, for repair and replacement activities related to the performance of preemptive weld overlays, and/or needed weld overlay repairs at the Sequoyah Nuclear Plant, Units 1 and 2 and the Watts Bar Nuclear Plant, Unit 1 As part of our review, the staff has identified the enclosed Request for Additional Information which will be necessary in order to complete our review. Based on discussions with your staff, we will expect your response by approximately September 18, 2006.

Sincerely,

/RA/

Douglas V. Pickett, Senior Project Manager Project Directorate II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-327, 50-328, 50-390

Enclosure:

As stated cc w/enclosure: See next page DISTRIBUTION:

PUBLIC LPL2-2 r/f RidsOgcRp RidsNrrDciCfeb RidsAcrsAcnwMailCenter RidsNrrDorlLpl2-2 EAndruszkiewicz RidsNrrLACSola RidsNrrPMDPickett RidsRgn2MailCenter ADAMS ACCESSION NO. ML062290496 NRR-088 OFFICE LPL2-2/PM LPL2-2/LA CFEB/BC LPL2-2/BC (A)

NAME DPickett RSola KGruss JDixon-Herrity DATE 08 / / 06 08 / 21 / 06 08 / 23 / 06 08 / 29 / 06 OFFICIAL RECORD COPY

Page 1 of 2 Mr. Karl W. Singer SEQUOYAH NUCLEAR PLANT Tennessee Valley Authority WATTS BAR NUCLEAR PLANT cc:

Mr. Ashok S. Bhatnagar, Senior Vice President Mr. Glenn W. Morris, Manager Nuclear Operations Corporate Nuclear Licensing Tennessee Valley Authority and Industry Affairs 6A Lookout Place Tennessee Valley Authority 1101 Market Street 4X Blue Ridge Chattanooga, TN 37402-2801 1101 Market Street Chattanooga, TN 37402-2801 Mr. Larry S. Bryant, Vice President Nuclear Engineering & Technical Services Mr. Paul L. Pace, Manager Tennessee Valley Authority Licensing and Industry Affairs 6A Lookout Place ATTN: Mr. James D. Smith 1101 Market Street Sequoyah Nuclear Plant Chattanooga, TN 37402-2801 Tennessee Valley Authority P.O. Box 2000 Mr. Robert J. Beecken, Vice President Soddy Daisy, TN 37384-2000 Nuclear Support Tennessee Valley Authority Mr. David A. Kulisek, Plant Manager 6A Lookout Place Sequoyah Nuclear Plant 1101 Market Street Tennessee Valley Authority Chattanooga, TN 37402-2801 P.O. Box 2000 Soddy Daisy, TN 37384-2000 Mr. Michael D. Skaggs, Site Vice President Watts Bar Nuclear Plant Senior Resident Inspector Tennessee Valley Authority Sequoyah Nuclear Plant P.O. Box 2000 U.S. Nuclear Regulatory Commission Spring City, TN 37381 2600 Igou Ferry Road Soddy Daisy, TN 37379 Mr. Randy Douet, Site Vice President County Mayor Sequoyah Nuclear Plant Hamilton County Courthouse Tennessee Valley Authority Chattanooga, TN 37402-2801 P.O. Box 2000 Soddy Daisy, TN 37384-2000 Mr. Paul L. Pace, Manager Licensing and Industry Affairs General Counsel Watts Bar Nuclear Plant Tennessee Valley Authority Tennessee Valley Authority ET 11A P.O. Box 2000 400 West Summit Hill Drive Spring City, TN 37381 Knoxville, TN 37902 Jay Laughlin, Plant Manager Mr. John C. Fornicola, Manager Watts Bar Nuclear Plant Nuclear Assurance and Licensing Tennessee Valley Authority Tennessee Valley Authority P.O. Box 2000 6A Lookout Place Spring City, TN 37381 1101 Market Street Chattanooga, TN 37402-2801

Page 2 of 2 Mr. Karl W. Singer SEQUOYAH NUCLEAR PLANT Tennessee Valley Authority WATTS BAR NUCLEAR PLANT cc:

Senior Resident Inspector Watts Bar Nuclear Plant U.S. Nuclear Regulatory Commission 1260 Nuclear Plant Road Spring City, TN 37381 County Executive 375 Church Street Suite 215 Dayton, TN 37321 County Mayor P. O. Box 156 Decatur, TN 37322 Mr. Lawrence E. Nanney, Director Division of Radiological Health Dept. of Environment & Conservation Third Floor, L and C Annex 401 Church Street Nashville, TN 37243-1532 Ms. Ann P. Harris 341 Swing Loop Road Rockwood, Tennessee 37854

OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR ADDITIONAL INFORMATION INSERVICE INSPECTION PROGRAM RELIEF REQUEST G-RR-1 SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 AND WATTS BAR NUCLEAR PLANT UNIT 1 TENNESSEE VALLEY AUTHORITY DOCKET NOS. 50-327, 50-328 AND 50-390

1. Table 2 of Regulatory Guide 1.147, Rev. 14, identifies the Code Cases that are conditionally acceptable, i.e., for use by licensees within the limitations and conditions identified in the table. Those conditions are identified by the staff during its review of the Code Cases and are necessary to ensure an acceptable level of quality and safety.

Therefore, licensees must include those conditions in their Relief Requests. No provisions are made in Regulatory Guide 1.147 for allowing licensees to delete or alter those conditions.

Tennessee Valley Authoritys (TVA)s June 16, 2006, letter requests relief from the Code Case N-638-1 condition in Table 2 of Regulatory Guide 1.147. Specifically, the letter states in part that, In lieu of the ultrasonic examination acceptance criteria of the Construction Code in the condition for the use of Code Case N-638-1, the acceptance criteria of ASME Section XI Nonmandatory Appendix Q, as stipulated in the Conditions of RG-1.147, Rev. 14, for the use of Code Case N-504-2 will be applied for the entire structural weld overlay. Therefore, in accordance with the reasoning stated in the previous paragraph, this Relief Request must be supplemented to recognize the Licensees compliance with the condition for N-638-1 to provide an acceptable level of quality and safety. The condition stated in the Regulatory Guide must be included in the relief request.

2. On page A4-2 of Attachment 4 to your submittal, you state that it is not practical to perform the full ultrasonic test (UT) of the 1.5T band. Your basis is that the existing nozzle configurations shown in the TVA drawings contained in Attachment 1, prevent you from completing the full UT. Please provide additional information to support your conclusion. The information provided should discuss the achievable amount of area that will be successfully examined for each pre-emptive weld overlay design configuration. Secondly, the UT examination should be performed on the maximum extent achievable.