ML081260712

03/20/08 - Summary of Meeting with TVA Steam Dryer Portion of the Extended Power Uprate Review (TAC Nos. MD5262, MD5263 and MD5264)

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 staff's 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 staff's 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)

DISTRIBUTION

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EXTERNAL DISTRIBUTION JWilcox(jdwolcott@tva.gov) SZiada(ziadas@mcmaster.ca) VShah(vnshah@anl.gov) SHambric(sah19@psu.edu)

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 Senior Vice President Nuclear Generation Development and Construction Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801

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. R. G. (Rusty) West Site Vice President 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.

Supervisor, Nuclear Site Licensing 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

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