ML081260712

Summary of Meeting with TVA Steam Dryer Portion of the Extended Power Uprate Review

ML081260712
Person / Time
Site:	Browns Ferry
Issue date:	06/05/2008
From:	Ellen Brown NRC/NRR/ADRO/DORL/LPLII-2
To:	Tennessee Valley Authority
Brown Eva, NRR/DORL, 415-2315
References
TAC MD5262, TAC MD5263, TAC MD5264
Download: ML081260712 (6)

Text

June 5, 2008 LICENSEE: Tennessee Valley Authority FACILITIES: Browns Ferry Units 1, 2, and 3

SUMMARY

OF MARCH 20, 2008, MEETING WITH TENNESSEE VALLEY AUTHORITY REGARDING STEAM DRYER PORTION OF THE EXTENDED POWER UPRATE REVIEW (TAC NOS. MD5262, MD5263, AND MD5264)

On March 20, 2008, the U.S. Nuclear Regulatory Commission (NRC) staff conducted a Category 1 public meeting with 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 the NRC staffs concerns with the steam dryer analyses provided in support of the extended power uprate (EPU) amendment request for Browns Ferry Nuclear Plant. Due to the proprietary nature of the information being discussed, only portions of the meeting were open to the public. The enclosure contains a list of attendees. The licensee presented slides regarding the steam dryer portion of the EPU review (see the Agencywide Documents Access and Management System Accession No. ML081120510).

DISCUSSION In letters dated January 31 and March 6, 2008, TVA provided the Group 1 and 2 responses to the NRC staffs Round 15 request for additional information. Based on the stress analysis provided in the March 6, 2008, response, the meeting focused on the results which indicated that the minimum alternating stress ratio for the Unit 1 dryer is 1.56. The NRC staff stated that the stress margin needed for reasonable assurance should be around 2.0. This value is in line with the margins obtained by previous boiling-water reactor licensees requesting similar power uprates. The NRC staff indicated concerns that the stress ratio would be further reduced to

~1.18 EPU conditions provided no acoustic resonance appears during power ascension; otherwise it could possibly be reduced further. TVA discussed the locations on the Unit 1 dryer that fell below expectations.

The discussion continued regarding crediting of additional damping. The NRC staff indicated continuing skepticism regarding the amount of dampening attributed by the analyses to other phenomenon. The licensee was requested to provide additional information to refine the steam dryer model and analysis.

No members of the public were in attendance; however one feedback form was received. No commitments or regulatory decisions were made by the NRC staff during the meeting.

/RA/

Eva A. Brown, Senior Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-259, 50-260, and 50-296

Enclosure:

List of Attendees cc w/encl: See next page

ML081260712 Pkg: ML081140324 TVA Slides: ML081120510 NRC-001 OFFICE LPLII-2/PM LPLII-2/LA LPLII-2 NAME EBrown:sp BClayton TBoyce DATE 06/02/08 06/02/08 06/05/08

SUMMARY

OF MARCH 20, 2008 MEETING REGARDING STEAM DRYER PORTION OF THE EXTENDED POWER UPRATE REVIEW (TAC NOS. MD5262, MD5263, AND MD5264)

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List of Attendees U. S. Nuclear Regulatory Commission Public Meeting with Tennessee Valley Authority Regarding Browns Ferry Power Uprate March 20, 2008 U. S. NUCLEAR REGULATORY COMMISSION ARGONNE NATIONAL LABORATORY Thomas Boyce Vik Shah Kamal Manoly Samir Ziada Chakrapani Basavaraju Mark Hartzman PENN STATE UNIVERSITY Eva Brown Steve Hambric TENNESSEE VALLEY AUTHORITY Kenneth Spates James Emens J.D. Wolcott Denzel Housley CONTINUUM DYNAMICS INCORPORATED Alan Bilanin Enclosure

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

Mr. Ashok S. Bhatnagar Mr. R. G. (Rusty) West Senior Vice President Site Vice President Nuclear Generation Development Browns Ferry Nuclear Plant and Construction Tennessee Valley Authority Tennessee Valley Authority P.O. Box 2000 6A Lookout Place Decatur, AL 35609 1101 Market Street Chattanooga, TN 37402-2801 Ms. Beth A. Wetzel, Manager Corporate Nuclear Licensing Vice President and Industry Affairs Nuclear Support Tennessee Valley Authority Tennessee Valley Authority 4X Blue Ridge 3R Lookout Place 1101 Market Street 1101 Market Street Chattanooga, TN 37402-2801 Chattanooga, TN 37402-2801 Mr. James E. Emens, Jr.

Mr. H. Rick Rogers Supervisor, Nuclear Site Licensing Vice President Browns Ferry Nuclear Plant Nuclear Engineering & Technical Services Tennessee Valley Authority Tennessee Valley Authority P.O. Box 2000 3R Lookout Place Decatur, AL 35609 1101 Market Street Chattanooga, TN 37402-2801 James B. Baptist Browns Ferry Senior Project Engineer Mr. D. Tony Langley, Manager Division of Reactor Projects, Branch 6 Licensing and Industry Affairs U.S. Nuclear Regulatory Commission Browns Ferry Nuclear Plant 61 Forsyth Street, SW.

Tennessee Valley Authority Suite 24T85 P.O. Box 2000 Atlanta, GA 30303-8931 Decatur, AL 35609 Tomy A. Nazario General Counsel Browns Ferry Project Engineer Tennessee Valley Authority Division of Reactor Projects, Branch 6 6A West Tower U.S. Nuclear Regulatory Commission 400 West Summit Hill Drive 61 Forsyth Street, SW.

Knoxville, TN 37902 Suite 24T85 Atlanta, GA 30303-8931 Mr. John C. Fornicola, General Manager Nuclear Assurance Senior Resident Inspector Tennessee Valley Authority U.S. Nuclear Regulatory Commission 3R Lookout Place Browns Ferry Nuclear Plant 1101 Market Street 10833 Shaw Road Chattanooga, TN 37402-2801 Athens, AL 35611-6970

Page 2 of 2 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. William R. Campbell, Jr.

Chief Nuclear Officer and Executive Vice President 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801