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Category:E-Mail
MONTHYEARML24022A2592024-01-22022 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 ML22123A1812022-05-0303 May 2022 NRR E-mail Capture - Acceptance Review Results for Sequoyah Nuclear Plant, Units 1 and 2, and Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Adopt TSTF-577 ML22115A1402022-04-25025 April 2022 NRR E-mail Capture - Requests for Confirmation of Information and Additional Information Regarding Watts Bar Nuclear Plant, Unit 2 Exemption Request Re 10 CFR Part 26 (L-2022-LLE-0017) ML22083A2372022-03-24024 March 2022 NRR E-mail Capture - Request for Additional Information and Confirmation of Information Related to Tva'S Request for Changes to Watts Bar Nuclear Plant, Units 1 and 2, Technical Specification 3.7.8 ML22081A2222022-03-22022 March 2022 NRR E-mail Capture - Acceptance Review Results for Watts Bar, Unit 1, License Amendment Request to Revise Allowable Value for TS Table 3.3.2-1, Function 6.e(1) ML22056A3802022-02-25025 February 2022 Document Request for Watts Bar Nuclear Plant - Radiation Protection Inspection - Inspection Report 2022-02 ML22131A1902022-02-23023 February 2022 NRR E-mail Capture - Acceptance Review Results for Watts Bar, Unit 2, Request to Revise the Reactor Vessel Surveillance Capsule Withdrawal Schedule ML22046A0392022-02-15015 February 2022 NRR E-mail Capture - Request for Confirmation of Information Regarding the Watts Bar Nuclear Plant, Unit 2, Cycle 4 Mid-Cycle Outage Generic Letter 95-05 Final Report ML22038A1882022-02-0404 February 2022 NRR E-mail Capture - Acceptance Review Results for TVA Fleet License Amendment Request to Revise the TVA Radiological Emergency Plan ML22018A0272022-01-18018 January 2022 2022 All RFI Responses - Exercise and Program Inspections - Revl ML22011A0382022-01-10010 January 2022 NRR E-mail Capture - Acceptance Review Results for Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-205-A, Rev. 3 and TSTF-563-A ML21306A2452021-11-0202 November 2021 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Revise Technical Specification 3.7.8, Essential Raw Cooling Water (ERCW) System ML21267A1392021-09-23023 September 2021 Document Request for Upcoming RP Inspection at Watts Bar ML21252A0912021-09-0909 September 2021 NRR E-mail Capture - Request for Comments on Proposed Issuance of Amendments to Watts Bar Nuclear Plant, Unit 2 - Revise Steam Generator Secondary Side Water Level ML21223A2592021-08-11011 August 2021 Affidavit - Prop Slides - Partially Closed Meeting with TVA Potential Watts Bar, Unit 2 Tube Locking LAR ML21221A2602021-08-0909 August 2021 NRR E-mail Capture - Request for Additional Information Regarding Tva'S Request to Revise Watts Bar, Unit 1 Tech Specs Related to Continuous Opening of the Auxiliary Building Secondary Containment Enclosure Boundary ML21215A1152021-07-26026 July 2021 NRR E-mail Capture - (External_Sender) Correction to WBN Chiller Replacement LAR ML21215A1142021-07-26026 July 2021 NRR E-mail Capture - (External_Sender) Correction to WBN Chiller Replacement LAR ML21197A0452021-07-15015 July 2021 WBN U1 Isi/Sgisi Request for Information (RFI) Letter ML21193A2422021-07-12012 July 2021 NRR E-mail Capture - Request for Additional Information Regarding Tva'S Request to Revise the Watts Bar Nuclear Plant, Unit 2 Technical Specifications Related to Steam Generator Inspection/Repair Program Provisions ML21189A0202021-06-29029 June 2021 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Revise Technical Specifications 3.3.6 and 3.3.7 Re Radiation Monitor Redundant Unit of Measure 2024-01-22
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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"