ML080350381

Summary of Meeting with Tennessee Valley Authority - on Extended Power Uprate Review

ML080350381
Person / Time
Site:	Browns Ferry
Issue date:	02/14/2008
From:	Ellen Brown NRC/NRR/ADRO/DORL/LPLII-2
To:
Brown E, NRR/DORL, 415-2315
References
TAC MD5262, TAC MD5263, TAC MD5264
Download: ML080350381 (6)

Text

February 14, 2008 LICENSEE:

Tennessee Valley Authority FACILITY:

Browns Ferry Nuclear Plant, Units 1, 2, and 3

SUMMARY

OF JANUARY 25, 2008, MEETING WITH TENNESSEE VALLEY AUTHORITY, ON EXTENDED POWER UPRATE REVIEW (TAC NOS. MD5262, MD5263, AND MD5264)

On January 25, 2008, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of Tennessee Valley Authority (TVA, the licensee) at NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discuss revisions to the licensees analyses of the affects of flow induced vibration on the steam dryers and main steam line components at extended power uprate (EPU) and their Request for Additional Information (RAI)-15 submittal. A portion of this meeting was closed to the public due to the discussion of proprietary information.

A list of attendees is enclosed.

The licensees slides used in their presentation may be accessed from the NRCs Agencywide Documents Access and Management System under No. ML080360067.

DISCUSSION TVA representatives presented an update on several nonconservative Finite Element Model (FEM) discrepancies (included in ML080360067). This update included a summary of the discrepancies found and what changes were made to verify the FEM. This discussion also included the difference between the Unit 1 steam dryer and the steam dryers of Units 2 and 3.

The licensee found that some modifications previously made to Unit 1 were not necessary and, therefore, will not be made to Units 2 and 3. The modifications to Units 2 and 3 steam dryers will be completed in 2009 and 2010 respectively.

The TVA representative presented a summary of the testing that is ongoing to identify, and if present, work to mitigate resonance when increasing their power levels to EPU. They have currently completed 1/5 Scale Model testing of the steam dryers. This testing showed resonance frequency onset. Due to this they are now working on 1/8 Scale Model testing to quantify the effects of potential resonance at EPU. The 1/5 Scale Model test only included the main steam lines. The 1/8 Scale Model test included the reactor vessel, steam dryer, nozzles, four main steam lines and other components. The NRC staff had several questions of the conservativeness of the results.

Due to the fact that a resonance frequency was found in initial testing, the licensee is unable use the same methods other licensees used for previously approved EPU submittals. Therefore, they have proposed a bump up factor to account for this frequency and track its changes as power is increased to EPU. The NRC staff counseled the licensee on the use of this method.

TVA had several questions about RAI-15 questions 139/106 and 145/112. After discussion with NRC staff question 139/106 will be answered for Unit 2 only. The NRC staff emphasized that it might become necessary for the licensee to answer the question for the other units at a later date. After discussion, question 145/112 was deleted. The NRC staff has an additional question which will be added to the next round of RAI questions.

The licensee indicated that the answers to all RAI questions would be completed by March 31, 2008 except for Unit 3. Unit 3 data would be provided by June 2008.

A member of the public was in attendance. Public Meeting Feedback form was not received.

No commitments or regulatory decisions were made by the NRC staff during the meeting.

Eva A. Brown, Senior Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No(s). 50-259, 50-260, and 50-296

Enclosure:

List of attendees cc w/encl: See next page

ML080350381 NRC-001 Package No.: ML080360097 Slides: ML080360067 OFFICE LPLIII-3/PM LPLII-2/PM LPLII-2/LA LPLII-2/BC NAME CGoodwin EBrown BClayton TBoyce DATE 02/07/08 02/14/08 02/06/08 02/14/08

List of Attendees U. S. Nuclear Regulatory Commission Public Meeting with Tennessee Valley Authority Regarding Browns Ferry Extended Power Uprate January 25, 2008 U. S. NUCLEAR REGULATORY COMMISSION ARGONNE NATIONAL LABORATORY Patrick Sekerak Vik Shah Andrey Turilin Kamal Manoly Cameron Goodwin Thomas Scarbrough Chakrapani Basavaraju John Wu Thomas Boyce Eva Brown TENNESSEE VALLEY AUTHORITY CONTINUUM DYNAMICS INCORPORATED Robert Marks Alan Bilanin James Emens Frank Hartwig Beth Wetzel Kenneth Spates J.D. Wolcott George Nelson CONSTELLATION ENERGY MCMASTER UNIVERSITY Gary Pavis Samir Ziada

Page 1 of 2 Tennessee Valley Authority BROWNS FERRY NUCLEAR PLANT cc:

Mr. Ashok S. Bhatnagar Senior Vice President Nuclear Generation Development and Construction Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. James R. Douet Vice President Nuclear Support Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. H. Rick Rogers Vice President Nuclear Engineering & Technical Services Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. D. Tony Langley, Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 General Counsel Tennessee Valley Authority 6A West Tower 400 West Summit Hill Drive Knoxville, TN 37902 Mr. John C. Fornicola, General Manager Nuclear Assurance Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Steven M. Douglas General Manager Browns Ferry Site Operations Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Ms. Beth A. Wetzel, Manager Corporate Nuclear Licensing and Industry Affairs Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. James E. Emens, Jr., Interim Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 James B. Baptist Browns Ferry Senior Project Engineer Division of Reactor Projects, Branch 6 U.S. Nuclear Regulatory Commission 61 Forsyth Street, SW.

Suite 24T85 Atlanta, GA 30303-8931 Tomy A. Nazario Browns Ferry Project Engineer Division of Reactor Projects, Branch 6 U.S. Nuclear Regulatory Commission 61 Forsyth Street, SW.

Suite 24T85 Atlanta, GA 30303-8931 Senior Resident Inspector U.S. Nuclear Regulatory Commission Browns Ferry Nuclear Plant 10833 Shaw Road Athens, AL 35611-6970

State Health Officer Alabama Dept. of Public Health RSA Tower - Administration Suite 1552 P.O. Box 303017 Montgomery, AL 36130-3017 Chairman Limestone County Commission 310 West Washington Street Athens, AL 35611 Mr. Larry E. Nicholson, General Manager Performance Improvement Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Michael A. Purcell Senior Licensing Manager Nuclear Power Group Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Michael D. Skaggs Site Vice President Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Page 2 of 2