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EPID:L-2020-LRM-0090, Teleconference Call with Tennessee Valley Authority Regarding a Non-Conservative Technical Specification for the Watts Bar Nuclear Plant (Open) |
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MONTHYEARML20295A5382020-10-21021 October 2020 Teleconference Call with Tennessee Valley Authority Regarding a Non-Conservative Technical Specification for the Watts Bar Nuclear Plant Project stage: Request ML20302A1232020-10-28028 October 2020 Pre-Submittal Meeting Slides Non-Voluntary Application to Modify WBN Unit 1 and Unit 2 TS Surveillance Requirement 3.6.15.4, Shield Building Project stage: Meeting ML20323A0662020-11-27027 November 2020 Summary of October 28, 2020, Teleconference with Tennessee Valley Authority Regarding Planned License Amendment Request for Technical Specification Surveillance Requirement 3.6.15.4, Shield Building Project stage: Meeting 2020-10-28
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Category:Meeting Briefing Package/Handouts
MONTHYEARML23291A1562023-10-18018 October 2023 NRC Pre-Submittal Meeting Watts Bar & Sequoyah LAR, TVA Presentation Slides ML23264A0412023-09-27027 September 2023 NRC Pre-Submittal Meeting WBN Rebaseline LAR, TVA Presentation Slides ML23251A1212023-09-12012 September 2023 RHR Flow Rate Reduction During Mode 6 Operation at 23 Ft. Refueling Water Level Technical Specification Change NON-PROPRIETARY Slides ML23251A1252023-09-12012 September 2023 Pre-submittal Meeting for License Amendment Request, Modify the Watts Bar Nuclear Plant Unit 1 and Unit 2 Technical Specification Surveillance Requirement 3.9.5.1 ML23178A0832023-07-10010 July 2023 Pre-submittal Meeting Slides for License Amendment Request to Revise Technical Specification Table 1.1-1 Regarding the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs ML23128A2882023-05-0808 May 2023 TVA Nuclear Plants -2022 EOC Media Slides ML23052A0362023-02-22022 February 2023 February 22, 2023, Pre-Submittal Meeting for the License Amendment Request for Increased Tritium Production at Watts Bar (EPID L-2023-LRM-0010) - Meeting Slides ML23044A5182023-02-15015 February 2023 Pre-Submittal Meeting Slides for Expedited License Amendment Request Re Main Control Room Chiller Completion Time Extension ML23041A3562023-02-15015 February 2023 February 15, 2023 Pre-submittal Meeting for Expedited License Amendment Request Main Control Room (MCR) Chiller Completion Time Extension (EPID L-2022-LRM-0098) (Slides) ML22318A1042022-11-14014 November 2022 Pre-submittal Meeting for American Society of Mechanical Engineers Boiler and Pressure Vessel Code Section XI, Request for Alternative WBN-2-ISI-01 Slide Presentation ML22157A4132022-06-0606 June 2022 Plants - Pre-Submittal Teleconference for Proposed Amendment Request Regarding the Change for the Sequoyah and Watts Bar Nuclear Plants Technical Specification 3.4.12 Meeting Slides ML22102A3032022-04-12012 April 2022 Pre-submittal Meeting for Request for Exemption from Requirements of 10 CFR 26.205(d)(4) and 10 CFR 26.205(d)(6) Slide Presentation ML22080A1662022-03-21021 March 2022 TVA Nuclear Plants -2021 EOC Media Loop Slides for Automatic Play ML21343A0282021-12-14014 December 2021 TVA Slide Presentation Regarding Pre-Submittal Meeting for Proposed Revision to Capsule Withdrawal Schedule ML21281A2282021-10-13013 October 2021 Tennessee Valley Authority Fleet Pre-Submittal Meeting for License Amendment Request to Change Emergency Action Level Scheme Presentation - October 13, 2021 (EPID L-2021-LRM-0096) (Slides) ML21250A3652021-09-0808 September 2021 Meeting Slides - Watts Bar Nuclear Plant Unit 2, Presubmittal Teleconference for Proposed License Amendment to Revise the Updated Final Safety Analyses Report (UFSAR) to Use a Tube Support Plate Locking/Displacement Analysis ML21217A2872021-08-19019 August 2021 TVA Slides - Pre-Submittal Meeting for Proposed License Amendment Request Re Application to Modify Technical Specification 3.7.8 Essential Raw Cooling Water (ERCW) System, to Support Permanent Shutdown Board ML21229A1992021-08-19019 August 2021 Mid-Cycle SG Outage Strategy (EPID L-2021-LRM-0067) (Slides) ML21231A0972021-08-18018 August 2021 TVA Slides - Pre-Submittal Meeting for Proposed LAR Regarding Application to Modify Watts Bar Units 1 and 2 Technical Specification 3.7.8, Essential Raw Cooling Water (ERCW) System, to Support Permanent Shutdown Board Cleaning ML21117A0722021-04-27027 April 2021 Meeting Slides for April 28, 2021 Meeting with TVA ML21096A1312021-04-0707 April 2021 Pre-submittal Meeting for Inservice Testing (IST) Program Request for One-Time Extension of Test Frequency of WBN Unit 1 Group 6 Relief Valves ML21041A1552021-02-11011 February 2021 Meeting Slides for February 11, 2021 Meeting with TVA ML20345A0262020-12-10010 December 2020 Replacement Steam Generator Project Planned License Amendment Request (Lars). LAR Descriptions and Submittal Schedule Meeting Slides ML20329A3722020-11-24024 November 2020 Pre-Submittal Teleconference for Proposed License Amendment Request Regarding Technical Specification 5.9.9, Steam Generator Tube Inspection Report, to Use Popcd Methodology ML20302A1232020-10-28028 October 2020 Pre-Submittal Meeting Slides Non-Voluntary Application to Modify WBN Unit 1 and Unit 2 TS Surveillance Requirement 3.6.15.4, Shield Building ML20239A8672020-08-27027 August 2020 Pre-Submittal Meeting Slides License Amendment Request for Technical Specification 5.7.2.19 ML20175A0552020-06-23023 June 2020 TVA Slides for June 23, 2020, Emergency Plan Change Presubmittal Meeting ML20125A3242020-05-0505 May 2020 Pre-Submittal Meeting Slides for License Amendment Request - Main Control Room Chiller Completion Time Extension ML20049G1822020-02-18018 February 2020 February 20, 2020 - Pre-submittal Meeting Presentation - Transition to Westinghouse Fuel ML20009C3962020-01-0808 January 2020 Pre-Submittal Telecon for Expedited License Amendment Request to Revise Technical Specification 3.3.5, LOP DG Start Instrumentation ML19347B0722019-12-12012 December 2019 TVA and Xcel Energy Slides for Joint Presubmittal Meeting to License Amendment Requests to Adopt WCAP-17661, Revision 1 ML19282A0082019-10-0909 October 2019 TVA Slides for Pre-Submittal Meeting for License Amendment Request to Correct Unbalanced Voltage Relay Instrumentation Values ML19255H5522019-09-12012 September 2019 August 27, 2019, Summary of Public Meeting - Tennessee Valley Safety Conscious Work Environment Update at Watts Bar, Docket 50-390 and 50-391 ML19298A0042019-09-12012 September 2019 Presentation Slides for 9/12/19 Public Meeting ML19252A0532019-09-0909 September 2019 TVA Presentation Slides: Watts Bar Nuclear Plant Pre-Submittal Meeting for License Amendment Request Revised Offsite Electrical Power Sources ML19235A2882019-08-23023 August 2019 2019 WBN SCWE Public Meeting Slides 8-27-2019 (NRC Slides) ML19235A2712019-08-23023 August 2019 2019 TVA Watts Bar Nuclear Plant Public Meeting Slides 08-27-2019 (TVA Slides) ML19178A2462019-07-0101 July 2019 Presentation Material for July 1, 2019 Pre-submittal Meeting with TVA on Full Spectrum LOCA Methodology for Watts Bar, Units 1 and 2 ML19161A2412019-06-11011 June 2019 Pre-Application Meeting for Proposed License Amendment Request (LAR) Regarding Change to the WBN Unit 2 Technical Specifications (TS) 3.4.17, Steam Generator Tube Integrity and 5.7.2.12 Steam Generator Program ML19161A2392019-06-10010 June 2019 Plants Pre-Submittal Meeting for Proposed License Amendments Hydrological Analysis Updates June 10, 2019 ML19142A3602019-05-21021 May 2019 May 9, 2019 Summary of Public Meeting; Watts Bar Nuclear Plant ML19018A0072019-01-18018 January 2019 (WBN)Pre-Submittal Meeting for Proposed License Amendment Request Regarding a One-Time Change for the WBN Unit 2 Technical Specification (TS) 3.7.8, Essential Raw Cooling Water (ERCW) System. ML18291A5732018-10-18018 October 2018 Chilled Work Environment ML18291A5632018-10-18018 October 2018 Chilled Worked Environment Update ML18248A1052018-09-0505 September 2018 Presentation Slides - Watts Bar Nuclear Plant Units 1 and 2 Adoption of TSTF-425 Initiative 5b - Surveillance Frequency Control Program - September 6, 2018 ML18248A1022018-09-0505 September 2018 Presentation Slides - Watts Bar Nuclear Plant (WBN) Pre-Submittal Meeting for Proposed License Amendment Request Regarding Shutdown Board Cleaning - September 6, 2018 ML18248A1012018-09-0505 September 2018 Bar Nuclear Plant (WBN) Pre-Submittal Meeting for Proposed License Amendment Adoption of TSTF-500 ML18248A1072018-09-0505 September 2018 Presentation Slides - Watts Bar Nuclear Plant Units 1 and 2 Adoption of 10 CFR 50.69 - September 6, 2018 ML18164A3192018-06-18018 June 2018 Presentation Material for 6/19/18 Pre-submittal Meeting ML18024A7932018-01-25025 January 2018 Presentation Slides - Watts Bar Nuclear Plant Unit 2 Pre-Submittal Meeting for Proposed License Amendment Request Regarding the Use of PAD4TCD in the Large Break Loss of Coolant Accident Analysis 2023-09-27
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Text
Watts Bar Nuclear Plant (WBN)
Non-Voluntary Application to Modify WBN Unit 1 and Unit 2 Technical Specification (TS) Surveillance Requirement (SR) 3.6.15.4, Shield Building" October 28, 2020
Agenda Opening Remarks
Background
Proposed Technical Specification (TS) Changes Basis for Proposed TS Changes Regulatory Precedent Schedule Milestones Closing Remarks l 2
Opening Remarks
- The proposed non-voluntary license amendment request (LAR) revises WBN Unit 1 and 2 SR 3.6.15.4 to:
- Resolve a non-conservatism regarding the potential to allow more shield building inleakage than analyzed in the safety analysis
- Align SR 3.6.15.4 with Revision 4 to the Westinghouse Standard TS (STS) (NUREG-1431)
- Currently plant operations are administratively controlled as described in AL 98-10. In accordance with the guidance in AL 98-10, this LAR is required to resolve a non-conservative TS and is not a voluntary request from a licensee to change its licensing basis.
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Background
- Demonstrate each EGTS train produces a pressure equal to or more negative than [-0.5] inches water gauge in the annulus relative to the Mechanical Equipment Room El. 772 within [ ] minute after a start signal with an inleakage of
< [500] cfm.
- Verify each EGTS train produces an annulus pressure equal to or more negative than -0.5 inch water gauge with respect to the El. 772 mechanical equipment-room with an inleakage of < 250 cfm at a system flow of 4000 + 10% cfm.
- Verify each Shield Building Air Cleanup System train with final flow ~ [ ] cfm produces a pressure equal to or more negative than [-0.5] inch water gauge in the annulus within [22] seconds after a start signal.
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Background (continued)
- On April 2, 1993 (ML073230276), the NRC transmitted the proof and review version of the WBN Unit 1 TS for TVAs review and comment.
- SR 3.6.9.4 for the EGTS revised as follows: Verify each EGTS train flow rate is 3600 and < 4400 cfm.
- SR 3.6.15.4 created Verify each Emergency Gas Treatment System train with final flow > 3600 and < 4400 cfm produces an annulus pressure equal to or more negative than -0.5 inch water gauge with respect to EL. 772 mechanical equipment room and with an inleakage of < 250 cfm within [TDB] seconds after a start signal.
- SR 3.6.9.4 for the EGTS revised as follows: Verify each EGTS train flow rate is 3600 and < 4400 cfm within 20 seconds from the initiation of a Containment Isolation Phase A signal.
- SR 3.6.15.4 revised to state Verify each Emergency Gas Treatment System train with final flow > 3600 and < 4400 cfm produces an annulus pressure equal to or more negative than -0.61 inch water gauge at elevation 783 with respect to the atmosphere and with an inleakage of < 250 cfm.
- This is the current verbiage for SRs 3.6.9.4 and 3.6.15.4
- The WBN Unit 2 OL was issued on October 22, 2015 (ML15251A587) and mirrored the WBN Unit 1 TS l 5
STS SR 3.6.8.4, Shield Building (Dual and Ice Condenser)
SR 3.6.8.4 Verify the shield building can be maintained at a [ [18] months on a STAGGERED pressure equal to or more negative than [-0.5] inch TEST BASIS for each Shield water gauge in the annulus by one Shield Building Building Air Cleanup System Train Air Cleanup System train with final flow [ ] cfm OR within [22] seconds after a start signal. In accordance with the Surveillance Frequency Control Program ]
Current WBN Unit 1 and 2 SR 3.6.15.4, Shield Building SR 3.6.15.4 Verify each Emergency Gas Treatment System train with In accordance with the Surveillance final flow 3600 and 4400 cfm produces an annulus Frequency Control Program pressure equal to or more negative than -0.61 inch water gauge at elevation 783 with respect to the atmosphere and with an inleakage of 250 cfm.
Proposed Change to WBN Unit 1 and 2 SR 3.6.15.4, Shield Building SR 3.6.15.4 Verify the Shield Building can be maintained at each In accordance with the Surveillance Emergency Gas Treatment System train with final flow Frequency Control Program 3600 and 4400 cfm produces an annulus pressure equal to or more negative than -0.63 inch water gauge at elevation 783 with respect to the atmosphere and with an inleakage of 250 cfm by one Emergency Gas Treatment System train with final flow 3600 and 4400 cfm within 20 seconds from the initiation after a start signal. (highlighted text is consistent with the current time requirement in SR 3.6.9.4 for the EGTS) l 6
Basis for Proposed Change to SR 3.6.15.4
- Change from -0.61 inch water gauge (in. w.g.) to -0.63 in. w.g
- Error discovered in calculation of this value
- As noted in TVA letter CNL-19-077, Application to Modify Watts Bar Nuclear Plant (WBN) Unit 1 and Unit 2 Technical Specifications 3.6.15, Shield Building, (WBN-TS-19-10) (ML19340B773), a calculated value of -0.63 inch w.g. at the elevation of the pressure sensors ensures the pressure at any elevation in the annulus is equal to or more negative than -0.25 inch w.g. consistent with BTP 6-3
- Removal of inleakage value of 250 cfm
- Aligns SR 3.6.15.4 with the STS 3.6.8.4
- This parameter is not included in any Surveillance Requirement in the STS
- Retain in current plant procedures
- The time requirement of 20 seconds ensures that the Shield Building can be rapidly drawn down to a negative pressure at all elevations in the Shield Building and ensures that no significant quantity of radioactive material leaks from the Shield Building prior to developing the negative pressure.
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Regulatory Precedent
- The proposed changes are consistent with the Westinghouse STS in NUREG-1431, Revision 4
- There are no other applicable regulatory precedents regarding the changes proposed in this LAR l 8
Planned Schedule Milestones
- November 2020 - LAR Pre-Submittal Meeting with NRC
- January 2021 - LAR Submittal - Request NRC Approval within 12 Months of Submittal l 9
Closing Remarks l 10