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Category:E-Mail
MONTHYEARML24260A0322024-09-10010 September 2024 NRR E-mail Capture - Request for Additional Information Regarding the Watts Bar Unit 2 Steam Generator Tube Inspection Report for U2R5 ML24215A3152024-07-24024 July 2024 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Adopt TSTF-276-A, Revision 2 TS 3.8.1, AC Sources ML24177A1412024-06-11011 June 2024 NRR E-mail Capture - Audit Plan Related to Review of the Sequoyah Nuclear Plant, Units 1 and 2, and Watts Bar Nuclear Plant, Units 1 and 2, LAR to Revise Technical Specification Table 3.3.2-1 Function 5 ML24157A3152024-06-0303 June 2024 2024 Sequoyah Commercial Grade Dedication Inspection Information Request ML24155A1372024-05-29029 May 2024 Email from K. Green to S. Hughes Request for Additional Information Related to License Amendment Request to Revise Residual Heat Removal Flow Rate ML24156A0062024-05-22022 May 2024 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Unit 1, License Amendment Request to Recapture Low-Power Testing Time ML24130A0132024-05-0707 May 2024 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Revise Technical Specification 3.7.11 for MCR Chiller Completion Time ML24123A0882024-05-0202 May 2024 NRR E-mail Capture - Correction Acceptance Review Results for the Browns Ferry, Sequoyah, and Watts Bar License Amendment Request to Revise TS 5.4.1 or 5.7.1 (L-2024-LLA-0039) ML24122B4872024-04-30030 April 2024 NRR E-mail Capture - Acceptance Review Results for the Browns Ferry, Sequoyah, and Watts Bar License Amendment Request to Revise TS 5.4.1 or 5.7.1 (L-2024-LLA-0039) ML24082A0662024-04-17017 April 2024 Email to Stuart Rymer on Exemption Decision for Watts Bar ML24116A2012024-04-17017 April 2024 Nrctva ISFSI CBS (RFI) ML24082A0682024-04-10010 April 2024 Email to Stuart Rymer Re_ Availability of EA-FONSI for Watts Bar ML24100A8392024-04-0909 April 2024 Response from State of Tn Regarding Review of Environmental Assessment for Watts Bar Exemption Request ML24100A8402024-04-0808 April 2024 Email to State of Tn Requesting Review of Environmental Assessment for Watts Bar Exemption Request ML24071A0982024-03-0707 March 2024 NRR E-mail Capture - Audit Plan Related to Review of the Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Revise Technical Specification Surveillance Requirement 3.9.5.1 to Reduce RHR Flow Rate ML24058A0962024-02-26026 February 2024 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant License Amendment Request to Revise UFSAR for Hydrologic Analysis ML24047A2792024-02-15015 February 2024 RAI Related to the Exemption Request for 10 CFR 37.11 ML24045A0312024-02-14014 February 2024 NRR E-mail Capture - Request for Additional Information Related to the Exemption Request for the 10 CFR Part 73 Enhanced Weapons Rule ML24033A0562024-02-0101 February 2024 NRR E-mail Capture - Correction Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Adopt TSTF-427-A, Revision 2 Regarding Degraded Barriers ML24036A0132024-01-23023 January 2024 NRR E-mail Capture - Acceptance Review Results for Sequoyah and Watts Bar Nuclear Plants, License Amendment Request to Revise TS Table 3.3.2-1, Function 5, Turbine Trip and Feedwater Isolation ML24022A2592024-01-22022 January 2024 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Unit 1, License Amendment Request to Revise TS LCO 3.8.2 to Remove Note C-S Diesel Generator ML24016A0762024-01-16016 January 2024 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2 - License Amendment Request to Rebaseline of Sections 3.1 and 3.2 of the Technical Specifications ML23347A0642023-12-13013 December 2023 12-13-23 Email from Kimberly Green to Wells, Russell, Subject: Results of NRC SUNSI Review of Watts Bar Nuclear Plant Dual-Unit UFSAR, Amendment 5 ML23334A0932023-11-28028 November 2023 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Revise TS Surveillance Requirement 3.9.5.1 to Reduce RHR Flow Rate During Mode 6 ML23319A1662023-11-0202 November 2023 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Sequoyah Nuclear Plant, and Watts Bar Nuclear Plant, Exemption Request Related to 10 CFR 37.11(c)(2) ML23254A2872023-09-11011 September 2023 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Revise TS Table 1.1-1 Re Number of Required Rvh Closure Bolts ML23236A2562023-08-24024 August 2023 NRR E-mail Capture - Acceptance Review Results for the Sequoyah and Watts Bar License Amendment Request to Adopt TSTF-567 (L-2023-LLA-0106) ML23191A8672023-07-10010 July 2023 NRR E-mail Capture - Acceptance Review Results for Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-501-A, Revision 1, Relocate Stored Fuel Oil and Lube Oil Volume Values to Licensee Control ML23166A1142023-06-15015 June 2023 Document Request for Watts Bar Nuclear Plant - Radiation Protection Inspection - Inspection Report 2023-03 ML23150A2472023-05-25025 May 2023 NRR E-mail Capture - Audit Plan Related to Review of the Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Increase the Number of Tritium Producing Burnable Absorber Rods ML23116A1492023-04-21021 April 2023 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Increase the Number of Tritium Producing Burnable Absorber Rods ML23075A0032023-03-13013 March 2023 NRR E-mail Capture - Acceptance Review Results for Watts Bar, Units 1, 2, and 3, License Amendment Request to Revise TS 3.7.11, Required Actions A.1 and E.1 Footnotes Re Date for the Modification ML23072A0722023-03-10010 March 2023 NRR E-mail Capture - (External_Sender) State Consultation - Sequoyah Nuclear Plant, Units 1 and 2; and Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Revise Technical Specification 3.4.12 (L-2022-LLA-0103) ML23067A2372023-03-0808 March 2023 WB_2023-02_RP_inspection_doc_request ML23013A0382023-01-12012 January 2023 NRR E-mail Capture - (External_Sender) State Consultation for Alabama - Browns Ferry, Units 1, 2 and 3; Sequoyah, Units 1 and 2; and Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-529, Revision 4 (L-2022-LLA-0088) ML23013A0362023-01-12012 January 2023 NRR E-mail Capture - (External_Sender) State Consultation for Alabama - Browns Ferry, Units 1, 2 and 3; Sequoyah, Units 1 and 2; and Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-554-A, Revision 1 (L-2022-LLA-0100) ML22356A2982022-12-22022 December 2022 Email Response to Letter, Dated November 22, 2022 Regarding Watts Bar Integrated Inspection Report ML22353A0812022-12-15015 December 2022 NRR E-mail Capture - Acceptance Review Results for Watts Bar, Unit 2, Alternative Request WBN-2-ISI-01 Regarding Examination of Upper Head Injection Nozzle Dissimilar Metal Piping Butt Welds ML22348A0972022-12-14014 December 2022 NRR E-mail Capture - State Consultation - Browns Ferry, Units 1, 2 and 3; Sequoyah, Units 1 and 2; and Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-529, Revision 4 (L-2022-LLA-0088) ML22348A0442022-12-13013 December 2022 NRR E-mail Capture - State Consultation - Browns Ferry, Units 1, 2 and 3; Sequoyah, Units 1 and 2; and Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-554-A, Revision 1 (L-2022-LLA-0100) ML22343A0692022-12-0808 December 2022 NRR E-mail Capture - Request for Additional Information - Sequoyah Nuclear Plant, Units 1 and 2, and Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Revise Technical Specification 3.4.12 (L-2022-LLA-0103) ML22227A0712022-08-15015 August 2022 NRR E-mail Capture - Acceptance Review Results for Sequoyah and Watts Bar License Amendment Request to Revise TS 3.4.12 (EPID L-2022-LLA-0103) - Corrected ML22227A0262022-08-12012 August 2022 NRR E-mail Capture - Acceptance Review Results for Sequoyah and Watts Bar License Amendment Request to Revise TS 3.4.12 ML22227A0272022-08-11011 August 2022 NRR E-mail Capture - Request for Additional Information Related to Alternative Requests RP-11 for Sequoyah Nuclear Plant, Units 1 and 2, and IST-RR-9 for Watts Bar Nuclear Plant, Units 1 and 2 ML22215A2752022-08-0303 August 2022 NRR E-mail Capture - Acceptance Review Results for TVA Fleet License Amendment Request to Adopt TSTF-554 ML22194A8762022-07-13013 July 2022 NRR E-mail Capture - Acceptance Review Results for TVA Fleet License Amendment Request to Adopt TSTF-529 ML22166A4292022-06-0606 June 2022 NRR E-mail Capture - LAR to Adopt TSTF-577 ML22146A3342022-05-25025 May 2022 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Units 1, 2, and 3, Sequoyah Nuclear Plant, Units 1 and 2, and Watts Bar Nuclear Plant, Units 1 and 2, Relief Requests (EPID L-2022-LLR-0045 - 0047) ML22136A0182022-05-16016 May 2022 NRR E-mail Capture - Acceptance Review Results for Sequoyah Nuclear Plant, Units 1 and 2, Alternative Request RP-11 and Watts Bar Nuclear Plant, Units 1 and 2, Alternative Request IST-RR-9 ML22144A1002022-05-12012 May 2022 NRR E-mail Capture - Request for Additional Information Related to Tva'S Request to Revised the TVA Plants' Radiological Emergency Plans 2024-09-10
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Text
1 WBN2Public Resource From: Poole, Justin Sent: Monday, June 20, 2011 3:41 PM To: Crouch, William D Cc: garent@tva.gov; Bryan, Robert H Jr; WBN2HearingFile Resource Attachments:
WB2-Audit-June.docxBill, Here is a draft version of the Audit plan for next week's trip to Westinghouse. Please pass this on.
JustinC.PooleProjectManagerNRR/DORL/LPWBU.S.NuclearRegulatoryCommission(301)4152048email:Justin.Poole@nrc.gov Hearing Identifier: Watts_Bar_2_Operating_LA_Public Email Number: 425 Mail Envelope Properties (19D990B45D535548840D1118C451C74D8CB267B7F1)
Subject:
Sent Date: 6/20/2011 3:40:56 PM Received Date: 6/20/2011 3:40:58 PM From: Poole, Justin Created By: Justin.Poole@nrc.gov Recipients: "garent@tva.gov" <garent@tva.gov>
Tracking Status: None "Bryan, Robert H Jr" <rhbryan@tva.gov>
Tracking Status: None "WBN2HearingFile Resource" <WBN2HearingFile.Resource@nrc.gov> Tracking Status: None "Crouch, William D" <wdcrouch@tva.gov> Tracking Status: None
Post Office: HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 270 6/20/2011 3:40:58 PM WB2-Audit-June.docx 22154 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:
AUDIT PLAN for the SECOND AUDIT of WATTS BAR NUCLEAR PLANT UNIT 2, COMPLETION of LICENSING ACTIVITIES, DOCKET NO. 50-391 On March 15 th, the SRXB staff conducted an audit at the applicant's fuel vendor office in Rockville, Maryland, in order to understand the bases for certain accident analyses, reported in the applicant's FSAR [1]. At that time, the vendor was unable to provide immediate responses to some of the staff's questions. Many of the responses, that were provided after the audit [2] [3], were deemed by the staff to be incomplete and/or inadequate. Consequently, the SRXB staff requests a second audit at the applicant's fuel vendor facility, in order to obtain the information the staff needs to complete its review.
This audit would give the staff access to material that might be proprietary in nature, to technical experts who are familiar with said material.
Audit Agenda
The audit is scheduled to begin on June 28th at Westinghouse's office in Cranberry, PA, and could continue for another three days (until July 1 st). Topics to be considered Steamline break analyses and methods The applicant's analyses of the major steamline break, reported in Chapter 15 of the FSAR, indicate that the most severe case, identified as the 1.4 ft 2 break, without offsite power available, produces a post-trip peak power level of three percent. The most severe case, in other plants of WB2's size and design, is identified as the 1.4 ft 2 break, with offsite power available, and can produce a post-trip peak power level that is up to ten times greater. The staff plans to discuss these analyses with the applicant's fuel vendor, Westinghouse, and review Westinghouse's supporting documentation (e.g., topical reports, calculation notes, computer input and output, correspondence, and technical literature) in order to understand WB2's unexpected analytical results.
Mass addition event analyses and methods The analysis results of the inadvertent operation of the ECCS at power, and the CVCS malfunction events have been received, and appear to be in order. The audit will provide the staff an opportunity to review the analyses with the applicant and confirm the staff's understanding of the methods and results.
RCS and main steam system overpressure analysis
The results of WB2's overpressure analysis have also been received. The staff will review the analyses with the applicant and make any necessary clarifications. This part of the audit will be guided by SRP 5.2.2, Overpressurization Protection.
LOCA analyses and post-LOCA boron precipitation The applicant's post-LOCA long-term core cooling and boric acid precipitation calculation will be reviewed and discussed, in order to assess its adequacy, and to determine whether further analysis is necessary to demonstrate compliance with 10 CFR 50.46.
The staff wishes to receive and review transient plots of the following parameters for the limiting large break LOCA (with respect to downcomer boiling) transient:
- a. Downcomer level and fluid temperatures b. Containment pressure c. RCS pressure d. Heat transfer coefficient at the hot spot
- e. PCT f. Sink Temperature at the PCI location g. Core level h. LPSI and HPSI injection mass flow rates i. Heat transfer from the barrel wall and thermal shield j. RWST temperature Westinghouse will also be asked to provide inform ation, previously requested by the staff, which pertains to:
- 1. Condensation model and maximization of condensation 2 The effect of the time step size on the results, down to and including 0.001 sec. 3. Confirmation of the correct conductivity in the downcomer walls 4. Values for the lateral k-factors in the downcomer (e.g., based on Idlechik) 5. The decay heat multiplier used in the limiting large break LOCA analysis 6. The nodalization diagram for the WCOBR/TRAC model. 7. The WB2 specific analysis of a bottom-mounted instrument tube failure
Watts Bar 2 incore system (WINCISE)
The audit will be used by the staff to discuss the information it has requested regarding the WINCISE, in order to gain the understanding it needs to complete its review of the system.
Audit Team
The audit team will consist of:
Samuel Miranda, Reactor Systems Branch Anthony Mendiola, Branch Chief of Nuclear Performance Code Review Branch Leonard Ward, Nuclear Performance Code Review Branch Sunil Weerakkody, Deputy Director of Division of Safety Systems Paul Clifford, Division of Safety Systems And other reviewers that may be asked to attend by their branch chiefs The following support personnel are requested:
Licensing staff from the Tennessee Valley Authority (TVA)
A manager from the TVA with the authority to request supporting services from Westinghouse Cognizant staff engineers from Westinghouse Electric Company A manager from Westinghouse with the authority to supply the requested supporting services Documentation of Audit Within 45 days of the audit exit, the NRC staff will prepare a detailed audit report documenting the information reviewed during the audit, and any open items that might be outstanding after the audit. The audit report will be provided to the applicant in draft form for proprietary markup.
References
[1] NRC letter to TVA dated April 27, 2011, "Watts Bar Nuclear Plant, Unit 2 - Audit Report of Westinghouse Documents Relating to Final Safety Analysis Report Accident Analyses (TAC NO. ME4620)"
[2] TVA letter to NRC dated May 13, 2011, "Watts Bar Nuclear Plant (WBN) Unit 2 - Additional Responses to Request for Additional Information Regarding (1) Large Break Loss of Coolant Accident, (2) Steam Line Break, and (3) Miscellaneous Analysis"
[3] TVA letter to NRC dated May 24, 2011, "Watts Bar Nuclear Plant (WBN) Unit 2 - Additional Responses to Request for Additional Information Regarding (1) Bottom Mounted Instrument (BMI) Tube Failure and (2) Mass Addition Events"