Letter Sequence Meeting |
|---|
|
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, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance...
- Supplement, Supplement, Supplement, Supplement, 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, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
Results
Other: ML070370281, ML073100027, ML073510180, ML080360067, ML080430700, ML080500171, ML080530256, ML081010450, ML081010451, ML081120502, ML081700294, ML081720078, ML081760295, ML082040065, ML082050462, ML082100425, ML082810470, ML083120308, ML083240224, ML083250083, ML090130718, ML090340528, ML090720951, ML090760630, ML091320366, ML092020345, ML092430520, ML092440518, ML092460495, ML092460496, ML092460497, ML092460498, ML092460500, ML092540483, ML092680057, ML12319A076, ML13044A498
|
MONTHYEARML0631104352006-11-0707 November 2006
Report of Emergency Core Cooling System (ECCS) Evaluation Model Changes
Project stage: Request
05000260/LER-2007-001, Re Automatic Turbine Trip and Reactor Scram Due to Equipment Failure During Performance of the Main Generator Rheostat Test2007-03-0202 March 2007
Re Automatic Turbine Trip and Reactor Scram Due to Equipment Failure During Performance of the Main Generator Rheostat Test
Project stage: Request
ML0711300782007-04-18018 April 2007
Units 1, 2, & 3 - Technical Specifications Changes TS-431 and TS-418 - Extended Power Uprate (EPU) - Supplemental Response to Requests for Additional Information (RAI)
Project stage: Supplement
ML0711503662007-04-24024 April 2007
Units 1, 2, & 3 - Fire Protection Program - Post-Fire Operator Manual Actions
Project stage: Request
ML0711503712007-04-24024 April 2007
Technical Specifications (TS) Changes TS-431 and TS-418 - Extended Power Uprate (EPU) - Steam Dryer Evaluations
Project stage: Request
ML0712905652007-05-16016 May 2007
Withholding Information from Public Disclosure, Response to Nuclear Regulatory Commission (NRC) Request for Additional Information - Round 12 for Browns Ferry EPU: Supplemental to SBWB-64
Project stage: RAI
ML0716303492007-06-15015 June 2007
Meeting with the Tennessee Valley Authority Concerning the Status of Browns Ferry Nuclear Plant, Units 1, 2 and 3, Steam Dryer Review
Project stage: Meeting
ML0718700242007-07-0303 July 2007
Technical Specifications (TS) Change TS-461 - Modification of Restart Large Transient Testing License Condition 2. (G) 2 - Supplement 1
Project stage: Request
ML0717801902007-07-0505 July 2007
Request for Additional Information for Extended Power Uprate - Round 13 (TS-431 and TS-418
Project stage: RAI
ML0719004762007-07-10010 July 2007
Meeting with the Tennessee Valley Authority (TVA) Concerning the Pending ACRS Meeting on the Browns Ferry Extended Power Uprate
Project stage: Meeting
ML0721501562007-07-18018 July 2007
Slides from Meeting with Tennessee Valley Authority on the Browns Ferry Power Uprate ACRS Presentation
Project stage: Meeting
ML0721303712007-07-27027 July 2007
Technical Specifications Changes TS-431 and TS-418, Extended Power Uprate - Steam Dryer Evaluations
Project stage: Request
ML0721303752007-07-31031 July 2007
CDI Report No. 07-05NP, Revision 0, Finite Element Model for Stress Assessment of Browns Ferry, Unit 1, Steam Dryer to 250 Hz
Project stage: Request
ML0721400442007-08-0808 August 2007
Summary of Meeting with Tennessee Valley Authority on the Browns Ferry Power Uprate ACRS Presentation
Project stage: Meeting
05000259/LER-2007-005, Regarding Automatic Reactor Scram Due to Turbine Trip as a Result of Invalid High Level in Moisture Separator Drain Tank2007-08-0808 August 2007
Regarding Automatic Reactor Scram Due to Turbine Trip as a Result of Invalid High Level in Moisture Separator Drain Tank
Project stage: Request
ML0723602572007-08-21021 August 2007
Technical Specifications (TS) Changes TS-431 and TS-418 - Extended Power Uprate (EPU) - Steam Dryer Limit Curves
Project stage: Request
ML0724805472007-08-31031 August 2007
Technical Specifications (TS) Changes TS-431 and TS-418 - Extended Power Uprate (EPU) - Response to Round 13 Request for Additional Information (RAI) - Containment Overpressure
Project stage: Request
ML0727606602007-10-0909 October 2007
Request for Additional Information for Extended Power Uprate - Round 14 (TS-418)
Project stage: RAI
ML0728902372007-10-18018 October 2007
Request for Withholding Information from Public Disclosure Concerning Round 13 Request for Additional Information for Browns Ferry Nuclear Plant (Tac Nos. MD5262, MD5263 and MD5264)
Project stage: RAI
ML0729603112007-10-22022 October 2007
Technical Specification (TS) Changes TS-431 & TS-418, Extended Power Uprate - EPU Large Transient Testing
Project stage: Request
ML0731000272007-11-0909 November 2007
Request for Schedule Regarding Analysis for Steam Dryers on Extended Power Uprate Amendment Requests (TAC Nos. MD5262, MD5263, and MD5264) (TS-431 and TS-418-S)
Project stage: Other
ML0732303482007-11-15015 November 2007
Units 1, 2, and 3 - Technical Specifications (TS) Changes TS-431 and TS-418 - Extended Power Uprate (EPU) - Response to Round 13 Request for Additional Information (RAI) - Containment Overpressure APLA-35/37
Project stage: Request
ML0733304832007-11-21021 November 2007
Technical Specifications (TS) Changes TS-431 and TS-418 - Extended Power Uprate (EPU) - Response to Preliminary Findings on Steam Dryer Stress Analysis
Project stage: Request
05000296/LER-2007-003, Leak in an ASME Class I Code Reactor Pressure Boundary Pipe2007-11-21021 November 2007
Leak in an ASME Class I Code Reactor Pressure Boundary Pipe
Project stage: Request
ML0735101802007-12-14014 December 2007
Technical Specifications Changes TS-431 and TS-418 - Extended Power Uprate - Schedule Regarding Analysis for Steam Dryers
Project stage: Other
ML0734607572007-12-19019 December 2007
Request for Withholding Information from Public Disclosure for Browns Ferry Nuclear Plant (Tac No. MD5262, MD5263 and MD5264)
Project stage: Withholding Request Acceptance
ML0735400102008-01-25025 January 2008
Summary of Meeting with Tennessee Valley Authority on Steam Dryer Portion of the Extended Power Uprate Review (TAC Nos. MD5262, MD5263, and MD5264), Browns Ferry Units 1, 2, and 3
Project stage: Meeting
ML0801504182008-01-25025 January 2008
(Public Version) - Summary of December 10, 2007 Meeting with TVA on Steam Dryer Portion of the Extended Power Uprate Review
Project stage: Meeting
ML0803205212008-01-25025 January 2008
Technical Specifications (TS) Changes TS-431 and TS-418 - Extended Power Uprate (EPU) Response to Round 15 Request for Additional Information (RAI) - APLA-38/40, SRXB-71, and SRXB-72
Project stage: Request
ML0803600672008-01-25025 January 2008
Steam Dryer RAI 15 Status, Slides
Project stage: Other
ML0802501652008-01-30030 January 2008
Request for Withholding Information from Public Disclosure for Browns Ferry Nuclear Plant (Tac Nos. MD5262, MD5263, and MD5264)
Project stage: Withholding Request Acceptance
ML0803805602008-01-31031 January 2008
Technical Specifications (TS) Change TS-431 and TS-418 - Extended Power Uprate (EPU) - Response to Round 15 Request for Additional Information (RAI) Regarding Steam Dryer Analyses
Project stage: Request
ML0804307002008-02-11011 February 2008
Technical Specifications (TS) Changes TS-431 and TS-418 - Extended Power Uprate (EPU) - Schedule Regarding EPU
Project stage: Other
ML0804304462008-02-11011 February 2008
Notification of Potential Part 21 Report Power Supply Unit Is Limited at Elevated Temperatures
Project stage: Request
ML0803503812008-02-14014 February 2008
Summary of Meeting with Tennessee Valley Authority - on Extended Power Uprate Review
Project stage: Meeting
ML0806501012008-02-21021 February 2008
Response to Round 16 Request for Additional Information SRXB-73
Project stage: Request
ML0805302562008-02-21021 February 2008
Unit 1 - Technical Specifications (TS) Change TS-431 - Extended Power Uprate (EPU) - Fuels Methods Commitments
Project stage: Other
ML0804506472008-02-27027 February 2008
Request for Withholding Information from Public Disclosure
Project stage: Withholding Request Acceptance
ML0803506982008-02-29029 February 2008
Request for Additional Information for Extended Power Uprate - Round 16 (TS-431 and TS-418) (TACs MD5262, MD5263, MD5264)
Project stage: RAI
ML0807104982008-03-0606 March 2008
(BFN) - Units 1, 2, and 3 - Technical Specifications (TS) Change TS-418 and TS-431 - Extended Power Uprate (EPU) - Response to Round 16 Request for Additional Information (RAI) - SRXB-74/86 and SRXB-87 Through SRXB-90
Project stage: Request
ML0811205102008-03-20020 March 2008
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) - Slides
Project stage: Meeting
ML0810104502008-04-0404 April 2008
(BFN) - Units 1, 2, and 3 - Technical Specifications (TS) Changes TS-431 and TS-418 - Extended Power Uprate (EPU) - Response to Round 15 and Round 16 Requests for Additional Information (RAI) Regarding Steam Dryer Analyses
Project stage: Other
ML0810104512008-04-0404 April 2008
Technical Specifications (TS) Changes TS-431 and TS-418 Extended Power Uprate (EPU) BFN Steam Monitoring Plan
Project stage: Other
ML0817602952008-04-0909 April 2008
Units 1, 2, & 3 - Technical Specifications Changes TS-431 and TS-418 - Extended Power Uprate - Confirmation of Commitment Completions
Project stage: Other
ML0811205022008-04-16016 April 2008
CDI Incoming Letter Dated April 16, 2008 Regarding NRC Presentation Entitled, Tennessee Valley Authority Browns Ferry Nuclear Plant - Extended Power Uprate Steam Dryers
Project stage: Other
ML0811302312008-04-17017 April 2008
Public Slides - Summary of April 17, 2008, Meeting Regarding Steam Dryer Portion of the Extended Power Uprate Review,
Project stage: Meeting
ML0811200332008-04-30030 April 2008
Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Browns Ferry Nuclear Plant, Units 1, 2, and 3 - Request for Withholding Information from Public Disclosure for Round 15 Fuels Responses
Project stage: Withholding Request Acceptance
ML0812806272008-05-0101 May 2008
Technical Specifications Change TS-418, Extended Power Uprate Supplemental Response to Round 16 Request for Additional Information - SRXB-87 & SRXB-89
Project stage: Supplement
ML0812804712008-05-0202 May 2008
Request for Additional Information for Extended Power Uprate - Round 17
Project stage: RAI
ML0805001712008-05-0202 May 2008
Schedule Regarding Analysis for Steam Dryers on Extended Power Uprate Amendment Requests (TAC Nos. MD5262, MD5263, and MD5264) (TS-431 and TS-418)
Project stage: Other
2007-07-05
[Table View] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 17, 2008 LICENSEE:
Tennessee Valley Authority FACILITIES:
Browns Ferry Nuclear Plant, Units 1 and 2
SUBJECT:
SUMMARY
OF JULY 18, 2008, MEETING WITH TENNESSEE VALLEY AUTHORITY REGARDING STEAM DRYER PORTION OF THE EXTENDED POWER UPRATE REVIEW (TAC NOS. MD5262 AND MD5263)
On July 18, 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 a slide presentation (see the Agencywide Documents Access and Management System accession No.
ML082050419).
DISCUSSION In a letter dated June 16, 2008, TVA completed the response to the NRC staff's Round 15 and 17 requests for additional information. The July 18th meeting was to address additional NRC staff concerns regarding the means intended to mitigate the two identified resonances, discuss the strategy proposed to improve the stress margin results, justify the application of substructure modeling in the manner proposed, and address the means proposed to address the identified noise.
The licensee addressed the two sources of resonance and the modifications planned to address them. The licensee has proposed the installation of an acoustic vibration suppressor (AVS) and acoustic side branch (ASB). It was discussed that the licensee believes that the larger resonance does not actually exist and the other is not as significant as that seen at Quad Cities Nuclear Power Station. The licensee is using a 1/8 th scale model test to predict the performance of the ASB modification In the area of stress margin improvement the licensee presented their strategy to address the steam dryer limiting locations. TVA intends to use the ASB and AVS modifications in combination with substructure modeling to ensure that the minimum alternating stress ratio of 2.0 at EPU conditions is achieved. The NRC staff had questioned the licensee's intent regarding inspection for existing cracks in the welds at the limiting locations. The licensee indicated that the welds for Unit 1 were inspected prior to its restart in May 2007 and the other units would be inspected consistent with industry practice.
- 2 To more accurately address the local geometry and weld configuration for two areas on the dryer the licensee is applying substructure modeling. A four-step process was discussed. The NRC staff had multiple questions regarding the establishment of appropriate boundary conditions.
Additionally, the NRC staff questioned the validity of the loading type used and the establishment of the reduction factor based on unit dynamic loading.
During the discussion, TVA provided a proposal regarding noise removal. The NRC had indicated various concerns including the removal of the low power strain gage data from current licensed thermal power strain gage data across the whole frequency range. This appeared to be different than other boiling-water reactor uprates. The NRC staff emphasized that for any signal removed, it should be demonstrated that the noise being subtracted out of the signal is plant induced background noise and not the noise floors of the sensors and data acquisition systems.
The discussion continued regarding crediting of additional damping. The NRC staff indicated continuing skepticism regarding the amount of damping attributed by the analyses to other phenomenon. The licensee was requested to provide additional information to refine the steam dryer model and analysis.
The licensee provided a proposed schedule and license condition that would allow completion of the EPU review for all three units by January 2009 without providing all the information requested on Unit 3. As information needed to support the acoustic response for Unit 3 is similar to either of the other units, the NRC staff indicated the intent to remain focused on the units for which the requested information had been provided and did not commit to the license condition or the schedule proposed.
Members of the public were in attendance; however no feedback forms were received. No commitments or regulatory decisions were made by the NRC staff during the meeting.
~;J.~
Eva A. Brown, Senior Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-259 and 50-260
Enclosure:
List of Attendees cc w/encl: Distribution via Listserv
Pkg: ML082050419 Mtg. Summary: ML082760583
LPLlI-2/PM LPLlI-2 EBrown LPLlI-2/LA EMCB/BC BClayton KManolv TBovce 11/12/08 11/10108 11/17/08 10/31/08
List of Attendees U. S. Nuclear Regulatory Commission Public Meeting with Tennessee Valley Authority Regarding Browns Ferry Power Uprate July 18, 2008 U. S. NUCLEAR REGULATORY COMMISSION Joseph Giitter Patrick Hiland Tracy Ort Kamal Manoly Chakrapani Basavaraju Eva Brown TENNESSEE VALLEY AUTHORITY Michael Purcell Kenneth Spates James Emens J.D. Wolcott Denzel Housley Robert Marks CONTINUUM DYNAMICS INCORPORATED Alan Bilanin Alex Boschitsch CONSTELLATION ENERGY CORPORATION Gary Pavis George Inch ARGONNE NATIONAL LABORATORY Vik Shah Samir Ziada (by phone)
PENN STATE UNIVERSITY Steve Hambric STRUCTURAL INTERGRITY ASSOCIATES Stan Tang INTERNATIONAL CIVIL ENGINEERING COI\\JSULTANTS Wen Tseng GENERAL ELECTRIC - HITACHI Patricia Campbell NUCLEAR MANAGEMENT AI Roderick
