|
---|
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
[Table view] |
Text
1 NRR-PMDAPEm Resource From: Schaaf, Robert Sent: Wednesday, November 30, 2016 2:13 PM To:Wells, Russell Douglas Cc:Gordon Arent; Johnston (Dion), Jeanne
Subject:
Watts Bar Units 1 and 2 DG Completion Time Extension LAR - Follow-up Questions
Related to October 13, 2016, RAI response (MF7147 and MF7148)
Attachments:
WBN EDG LAR - Follow-up Questions to October 13 2016 RAI response.pdf Russ, By letter dated March 11, 2016 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML16071A456), as supplemented by letter dated October 13, 2016 (Accession No.
ML16287A656), the Tennessee Valley Authority (TVA) submitted an application for a proposed amendment for Watts Bar Nuclear Plant (WBN), Units 1 and 2.
The Nuclear Regulatory Commission (NRC) staff has reviewed TVA's responses to staff requests for additional information in TVA's letter dated October 13, 2016, and has identified several supplemental requests for additional information (RAIs) to support completion of its review. The specific information requested is attached to this e-mail. The proposed questions were provided to you on November 25, 2016, for clarification if needed.
You indicated by phone on November 30, 2016, that no clarification was needed and agreed to provide a response to this request by December 30, 2016.
Please confirm receipt of these final RAIs. Please contact me if you have any further questions regarding this request.
Regards, Robert G. Schaaf Robert G. Schaaf Senior Project Manager, Watts Bar/Bellefonte
Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop O-8G9A Washington, DC 20555
301-415-6020 (o) Robert.Schaaf@nrc.gov Robert G. Schaaf Robert G. Schaaf Senior Project Manager, Watts Bar/Bellefonte Plant Licensing Branch II-2 Division of Operating Reactor Licensing 2Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop O-8G9A Washington, DC 20555 301-415-6020 (o) Robert.Schaaf@nrc.gov
Hearing Identifier: NRR_PMDA Email Number: 3246 Mail Envelope Properties (5dfca7bd2c674667b2d84a73696b9049)
Subject:
Watts Bar Units 1 and 2 DG Completion Time Extension LAR - Follow-up Questions Related to October 13, 2016, RAI response (MF7147 and MF7148) Sent Date: 11/30/2016 2:13:17 PM Received Date: 11/30/2016 2:13:00 PM From: Schaaf, Robert Created By: Robert.Schaaf@nrc.gov Recipients: "Gordon Arent" <garent@tva.gov> Tracking Status: None "Johnston (Dion), Jeanne" <jeanne.johnston@nrc.gov> Tracking Status: None "Wells, Russell Douglas" <rdwells0@tva.gov>
Tracking Status: None Post Office: R4PWMSMRS03.nrc.gov
Files Size Date & Time MESSAGE 1885 11/30/2016 2:13:00 PM WBN EDG LAR - Follow-up Questions to October 13 2016 RAI response.pdf 47974 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received: ZZZ WATTS BAR NUCLEAR PLANT UNITS 1AND 2SUPPLEMENTAL REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST TO REVISE TECHNICAL SPECIFICATIONS TO EXTEND INOPERABLE DIESEL GENERATOR COMPLETION TIME TECHNICAL SPECIFICATION 3.8.1,AC SOURCES -OPERATING (TAC NOS. MF7147 ANDMF7148)The Tennessee Valley Authority (TVA) submitted a license amendment request (LAR) for Watts Bar Nuclear Plant (WBN) Units 1 and 2, by letter dated March 11, 2016 (AgencywideDocuments Access and Management System (ADAMS) Accession No. ML16071A456). The LAR proposedrevision to Technical Specification(TS) 3.8.1, "AC Sources -Operating," to extend the Completion Time (CT) for one inoperable Diesel Generator (DG) from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 14 days based upon the availability of a supplemental alternating current (ac) power source (i.e., a 6.9 kilovolt (kV) FLEX DG). TVA stated that the changes are requested to provide operational and maintenance flexibility. TVA statedthat the proposed CT will allow sufficient time to perform planned maintenance activities that cannot be performed within a 72-hour CT.By letter dated October13, 2016(ADAMS Accession No. ML16287A656),TVA provided responses to staff requests for additional information (RAIs) dated August 3, 2016. The staff has reviewed TVA's responses to the staff's RAIs and has identified supplemental requests for additional information as identified in the follow-upRAIsprovided below.1.TVA response to RAINo. 6states (Reference Page E1-13):"The timeline, based on plant procedures, for connecting the proposed 6.9 kV FLEX DG to the associated safety-related busses is shown on Figure 2, approximately 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />."The staff requests additional information on the timelineto restore power to a6.9 kV shutdown board from the FLEX DG,similar to the level of detail provided verbally to the staff during an October 14, 2016, teleconference to support TVA's request for aNotice of Enforcement Discretion (NOED).The NOED request was subsequently documented in TVA's letter dated October 18, 2016 (ADAMS Accession No. ML16292A827).
2.The following pages ofTVA's October 13, 2016,RAI responsestate that the FLEX DG will be connected within 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />s[Prior to 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />s], thus creating an inconsistency with the 2 hourtimeline discussed in the follow-up Question 1 above. For example:Page E1-8: "Prior to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, the 6.9 kV FLEX DG would be aligned to the Unit 1 6.9 kV SDB..."Page E1-8: "Prior to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, one or more6.9 KV FLEX diesel(s) would be aligned to the Unit 2 6.9 kV SDB..."
2 Page E1-12: "Prior to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, the FLEX DG would be aligned to the unpowered A train SDB."Page E1-12: "Prior to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, the FLEX DG would be aligned to the unpowered 2B-Btrain SDB."Please correct or clarify thisinconsistency and confirm that the FLEX DG will be aligned to the appropriate shutdown bus within the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> period discussedabove and in previous communications.
- 3. Page E1-6of the RAI responses states, "This FSI implements FLEX strategies to place a 480V FLEX DG in operation or to extend DC battery lifetime to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. Extending battery lifetime is accomplished by performing a DC load shed within the first 90 minutes of the event if neither 480V FLEX DGs can be initially placed in operation. If no 480V FLEX DG is available when the 6.9 kV FLEX DG(s) are available, guidance is provided to power the 6.9 kV SDB(s) with the available 6.9 kV FLEX DG which would allow the 480V SDB(s) to be energized from the 6.9 kV SDB."The proposed TS 3.8.1 mark-up pagesdo not identify the 480 V FLEX DG as a required source for the proposed LAR.Please confirm that the 480V FLEX DGs are procedurally required to be connected to the station busses but are not credited for the purposes ofthis LAR,as alternate plans to load shed the DC system or connect the 6.9 kV DGs in a timely manner may be implementedin case of failure of the 480V FLEX DGs.
4.The staff also reviewed the information provided on page E1-9of and Table3-1, "6.9kV FLEX Diesel Generator Loads"of the RAI responses.Please provide the timeline ofFLEX DGloads separately for each of the following scenarios, up to the time both units will bein cold shutdown. (Note: In thefollowing scenarios, the staff assumes that aFLEX DG is connected to a 6.9 kV shutdown board/bussothat at least one train has a safety-related DG and a FLEX DGto provide cold shutdown of both units).i.LOOP (both Units), when Unit 1 DG 1A-A (or 1B-B) is under maintenance, the redundant DG 1B-B (or 1A-A) fails to start (SBO Unit 1),and a Unit 2 DG 2A-Ahas a single failure.ii.LOOP (both Units), SBO Unit 1,and a Unit 2 DG 2B-B has a single failure. iii.LOOP (both Units),SBOUnit 2,and a Unit 1 DG 1A-Ahas a single failure.iv.LOOP (both Units), SBO Unit 2,and a Unit 1 DG 1B-B has a single failure. v.In addition to the major loads, provide details of any miscellaneous loads which are likely to be fed from the FLEX DG.