Letter Sequence Other |
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TAC:MC3743, Revise Containment Requirements During Handling Irradiated Fuel and Core Alterations (Approved, Closed) TAC:MC3744, (Approved, Closed) TAC:MC3812, Revise Containment Requirements During Handling Irradiated Fuel and Core Alterations (Approved, Closed) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance, Acceptance, Acceptance, Acceptance, Acceptance
- Supplement, Supplement, Supplement
Administration
- Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
Results
Other: ML042370100, ML050380283, ML050590036, ML050900421, ML051150191, ML051160036, ML051320148, ML051430036, ML051570381, ML051660602, ML052290397, ML060530185, ML060670304, ML060680586, ML060680590, ML060680596, ML060680599, ML060720253, ML060720272, ML060720273, ML060720281, ML060720293, ML060720295, ML060720298, ML060720303, ML060720354, ML060830009, ML060880464, ML060880469, ML061040217, ML061210117, ML061770163, ML061840027, ML061910705, ML062050056, ML062090482, ML062090555, ML062120411, ML062130163, ML062130343, ML062200277, ML062210102, ML062220647, ML062270240, ML062400472, ML062510022, ML062510371, ML062510374, ML062510382, ML062510385... further results
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MONTHYEARML0607202531975-05-23023 May 1975
May 23, 1975 - Final Summary Report Unit 2 Startup
Project stage: Other
ML0606805861975-05-23023 May 1975
May 23, 1975 - Final Summary Report Startup, Enclosure 4
Project stage: Other
ML0607202721977-05-0909 May 1977
May 9, 1977 - Final Summary Report Unit 3 Startup
Project stage: Other
ML0606805901977-05-0909 May 1977
May 9, 1977 - Final Summary Report Startup, Enclosure 5
Project stage: Other
ML0607202731992-11-30030 November 1992
A Guide for Environmental and Best Management Practices for Tennessee Valley Authority Transmission Construction and Maintenance Activities
Project stage: Other
ML0607202982001-03-13013 March 2001
Environmental Assessment Bear Creek Reservoirs Land Management Plan
Project stage: Other
ML0607202952001-03-31031 March 2001
Bear Creek Reservoirs Land Management Plan, Resource Stewardship Bear Creek Watershed
Project stage: Other
ML0606805992001-03-31031 March 2001
Bear Creek Reservoirs Land Management Plan
Project stage: Other
ML0423701002004-08-23023 August 2004
Ltr, Framatome Proprietary Review
Project stage: Other
ML0429202832004-11-18018 November 2004
Ltr, Results of Acceptance Review for Extended Power Uprate
Project stage: Acceptance Review
ML0431004762004-11-18018 November 2004
Ltr, Results of Acceptance Review for EPU
Project stage: Acceptance Review
ML0433701792004-12-29029 December 2004
RAI Re Extended Power Uprate
Project stage: RAI
ML0434400452004-12-30030 December 2004
RAI, Extended Power Uprate
Project stage: RAI
ML0500303612005-01-0606 January 2005
Ltr, Request for Information for Status of Amendment (Tac No. MC1330, MC1427, MC2305, MC3812, MC4070, MC4071, MC4072, MC4161, MC3743, MC3744)
Project stage: RAI
ML0501001802005-01-0707 January 2005
December 02, 2004 Browns Ferry Nuclear Plant, Units 1, 2, and 3, Summary of NRC Site Visit and Meeting Regarding Extended Power Uprate and License Renewal Applications
Project stage: Meeting
ML0503802832005-02-16016 February 2005
Summary of Conference Call with TVA Status of Amendments Using Method 3
Project stage: Other
ML0505900362005-02-16016 February 2005
Enclosure 2, 02/01/2005 Conference Call with TVA Presentation Slides on TS Changes Using Method 3 for Interim Solution
Project stage: Other
ML0505601502005-02-23023 February 2005
Response to NRC Acceptance Review Letter and Request for Additional Information Related to Technical Specifications Change No. TS-431 - Request for Extended Power Uprate Operation
Project stage: Request
ML0505603372005-02-23023 February 2005
(BFN) - Response to NRCs Acceptance Review Letter and Request for Additional Information Related to Technical Specifications Change No. TS-418 - Request for Extended Power Uprate Operation (Tac Nos MC3743 and MC3744)
Project stage: Request
ML0607202932005-02-28028 February 2005
Hydrothermal Modeling of Browns Ferry Nuclear Plant with Units 1, 2, and 3 at Extended Power Uprate
Project stage: Other
ML0606805962005-02-28028 February 2005
Hydrothermal Modeling of Browns Ferry with Units 1, 2, and 3 at Extended Power Uprate
Project stage: Other
ML0508801572005-04-0101 April 2005
Summary of February 2005 Conference Calls Regarding Extended Power Uprate Acceptance Review Reply
Project stage: Acceptance Review
ML0509004212005-04-19019 April 2005
Ltr, Licensing Action, Dependencies Requests
Project stage: Other
ML0511501912005-04-19019 April 2005
Enclosure 3, Ltr, Licensing Action Status and Interdependencies
Project stage: Other
ML0511702442005-04-25025 April 2005
(BFN) - Unit 1 - Response to NRCs Request for Additional Information Related to Technical Specifications (TS) Change No. TS-431 - Request for Extended Power Uprate Operation
Project stage: Request
ML0511702422005-04-25025 April 2005
(BFN) - Units 2, and 3 - Response to NRCs Request for Additional Information Related to Technical Specifications (TS) Change No. TS-418 - Request for Extended Power Uprate Operation
Project stage: Request
ML0514300362005-05-20020 May 2005
Response to NRCs Letter on Licensing Action Status and Interdependencies,
Project stage: Other
ML0513201462005-05-27027 May 2005
EPU Acceptance Review Results to Increase Maximum Authorized Power Level (TAC No. MC3743, MC3744) (TS-418)
Project stage: Acceptance Review
ML0513201022005-05-27027 May 2005
Ltr., Extended Power Uprate Acceptance Review Results (Tac No. MC3812) (TS-431)
Project stage: Acceptance Review
ML0516403912005-06-0606 June 2005
Response to Technical Specifications (TS) Change No. TS-418 - Request for License Amendment - Extended Power Uprate (EPU) Operation
Project stage: Request
ML0515802492005-06-0606 June 2005
Response to NRCs Request for Additional Information Related to Technical Specifications (TS) Change No. TS - 431 - Request for License Amendment Extended Power Uprate (EPU) Operation
Project stage: Request
ML0515703812005-06-29029 June 2005
Fanp, Withholding Information from Public (TACs MC3743, MC3744)
Project stage: Other
ML0516606022005-06-29029 June 2005
Ltr., Withholding Public Disclosure for GE Company (TACs MC3743, MC3744)
Project stage: Other
ML0513201482005-06-29029 June 2005
Ltr., Ind FRN Facility Operating License for EPU and Opportunity for a Hearing
Project stage: Other
ML0511600362005-07-0101 July 2005
Notice of Consideration of Issuance of Amendment and Notice of Opportunity for a Hearing Regarding Extended Power Uprate (Tac No. MC3743, MC3744)
Project stage: Other
ML0518703902005-07-0707 July 2005
Meeting Summary with TVA and Framatome Regarding Fuel Analysis Methodology, Enclosure 2, Framatome Presentation
Project stage: Meeting
ML0520003282005-07-14014 July 2005
Surveillance Program for Channel-Control Blade Interference
Project stage: Request
ML0520706042005-07-26026 July 2005
Notice of Meeting with Tennessee Valley Authority (TVA) BFN Units 1, 2, and 3, and Sequoyah Units 1 and 2 on Resolution of Instrument Setpoint Concerns
Project stage: Meeting
ML0524204912005-08-23023 August 2005
Ltr., GE Request for Withholding Information from Public on Steam Dryer Analysis for EPU Conditions
Project stage: Withholding Request Acceptance
ML0522901442005-09-0202 September 2005
Summary of Meeting with the Tennessee Valley Authority Regarding Plant-Specific Resolution of Instrument Setpoint Concerns
Project stage: Meeting
ML0522903972005-09-0202 September 2005
TVA Handout Method 3 Issue BFN Proposed Resolution
Project stage: Other
ML0526600222005-09-30030 September 2005
Proprietary Information Review, Regarding GE Request for Withholding Information from Public Disclosure for Browns Ferry Unit 1, EPU Enclosure 4
Project stage: Withholding Request Acceptance
ML0524303412005-10-0303 October 2005
RAI, Extended Power Uprate (TS-431) (Tac No. MC3812)
Project stage: RAI
ML0525104462005-10-0303 October 2005
Request for Additional Information Regarding Extended Power Uprate
Project stage: RAI
ML0535601862005-12-19019 December 2005
Response to NRC Round 2 Request for Additional Information Related to Technical Specifications Change No. TS-418-Request for Extended Power Uprate Operation
Project stage: Request
ML0535601942005-12-19019 December 2005
Response to NRC Round 2 Requests for Additional Information Related to Technical Specifications Change No. TS-431 - Request for Extended Power Uprate Operation
Project stage: Request
05000296/LER-2005-003, Regarding Reactor Scram from Main Turbine Trip During Switching Operation2005-12-19019 December 2005
Regarding Reactor Scram from Main Turbine Trip During Switching Operation
Project stage: Request
ML0535601202005-12-22022 December 2005
Request for Additional Information, Information Concerning Extended Power Uprate
Project stage: RAI
ML0535601772005-12-22022 December 2005
Request for Additional Information, Concerning Extended Power Uprate
Project stage: RAI
ML0535703412006-01-19019 January 2006
Revised Schedule for Response to Extended Power Uprate Requests for Additional Information
Project stage: RAI
2005-02-23
[Table View] |
Text
August 1, 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:
BROWNS FERRY NUCLEAR PLANT, UNITS 1, 2, AND 3 PRELIMINARY FINDINGS ON STEAM DRYER STRESS ANALYSIS ON EXTENDED POWER UPRATE AMENDMENT REQUESTS (TAC NOS. MC3812, MC3743, AND MC3744) (TS-431 AND TS-418)
Dear Mr. Singer:
This letter documents telephone discussions between the U.S. Nuclear Regulatory Commission (NRC) staff and the Tennessee Valley Authority (TVA, the licensee) on July 27, 2006. The discussions concerned the NRC staffs preliminary findings on TVAs response to the NRC staff requests for additional information related to potential adverse flow effects on the steam dryers in Browns Ferry Nuclear Plant (BFN) Units 1, 2, and 3, at uprated power conditions. In the calls, the NRC staff reiterated its continued concerns on the structural integrity of the steam dryers. These concerns should be expeditiously resolved to enable the NRC staff to complete its review consistent with TVAs schedule for extended power uprate (EPU) and restart of Unit 1.
In a letter dated June 23, 2006, TVA submitted a revised BFN steam dryer stress analysis report. This report supplemented the stress analysis provided in May 2006 and presented proposed modifications to the steam dryers. As the revised stress analysis results indicated that some locations on the steam dryer would exceed the fatigue endurance limit during EPU conditions, the NRC staff concluded that the submittal did not provide an adequate technical basis to enable the NRC staff to find the applications acceptable. On July 21, 2006, TVA submitted a revised BFN stress analysis report with plans for additional steam dryer modifications that were discussed during several conference calls with the NRC staff. During calls conducted on July 24 and July 26, TVA was notified that the uncertainties assumed in the revised stress reports remained nonconservative. In response to the NRC staffs observations, TVA indicated that the uncertainties were being increased.
Subsequently on July 26, 2006, TVA submitted a new stress analysis report, which included revised uncertainties, to replace the July 21 submittal. The NRC staffs initial review of the July 26 submittal identified concerns with the licensees assumptions regarding specific aspects of the revised steam dryer stress analysis. For example, the licensee assumes a higher damping value than considered appropriate by the NRC staff for high frequency pressure loads.
A lower damping value was used in the steam dryer stress analysis for another nuclear power plant in evaluating EPU flow effects. Further, the licensee calculated the maximum stress
K. W. Singer intensity for steam dryer components through a finite element analysis using the nominal load case and specific frequency shifts, but did not include the sensitivity of the BFN steam dryer stress analysis to smaller time steps. TVA was notified of these concerns on July 27, 2006.
During the July 27 call, TVA presented various reasons to support the damping value selected, including the guidance provided in Regulatory Guide (RG) 1.61, Damping Values for Seismic Design of Nuclear Power Plants. As discussed then, the Unit 1 scale model report indicates resonance peaks at frequencies (100-125 hertz), which are substantially higher than those considered in RG 1.61 (2-12 hertz) for seismic excitation of structures. Therefore, the NRC staff considers the use of the damping values from RG 1.61 to be inappropriate for this application.
In the interest of expeditious resolution of the steam dryer issues, the NRC staff is pro-actively communicating issues while the detailed review is in progress to provide TVA adequate time to address steam dryer issues.
If you have any questions, please contact me at (301) 415-1389.
Sincerely,
/RA/
L. Raghavan, Chief Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-259, 50-260, and 50-296 cc: See next page
ML062090555 NRR-106 OFFICE LPL2-2/PM LPL2-2/PM LPL2-2/LA LPL2-2/BC NAME EBrown MChernoff BClayton LRaghavan DATE 8/1/06 8/1/06 8/1/06 8/1/06
Mr. Karl W. Singer BROWNS FERRY NUCLEAR PLANT Tennessee Valley Authority cc:
Mr. Ashok S. Bhatnagar, Senior Vice President Nuclear Operations Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Larry S. Bryant, Vice President Nuclear Engineering & Technical Services Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Brian OGrady, Site Vice President Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Robert J. Beecken, Vice President Nuclear Support Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 General Counsel Tennessee Valley Authority ET 11A 400 West Summit Hill Drive Knoxville, TN 37902 Mr. John C. Fornicola, Manager Nuclear Assurance and Licensing Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Bruce Aukland, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Chairman Limestone County Commission 310 West Washington Street Athens, AL 35611 Mr. Masoud Bajestani, Vice President Browns Ferry Unit 1 Restart Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Robert G. Jones, General Manager Browns Ferry Site Operations Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Larry S. Mellen Browns Ferry Unit 1 Project Engineer Division of Reactor Projects, Branch 6 U.S. Nuclear Regulatory Commission 61 Forsyth Street, SW.
Suite 23T85 Atlanta, GA 30303-8931 Mr. Glenn W. Morris, Manager Corporate Nuclear Licensing and Industry Affairs Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. William D. Crouch, Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 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
