Letter Sequence Approval |
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EPID:L-2017-LLA-0391, Application to Modify the Technical Specifications for Browns Ferry (TS-512), Sequoyah (TS-17-03), and Watts Bar (TS-17-20) to Resolve the Open Phase Issue Identified in NRC Bulletin 2012-01, Design Vulnerability in Electrical Power System. (Approved, Closed) |
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MONTHYEARCNL-17-034, Application to Modify the Technical Specifications for Browns Ferry (TS-512), Sequoyah (TS-17-03), and Watts Bar (TS-17-20) to Resolve the Open Phase Issue Identified in NRC Bulletin 2012-01, Design Vulnerability in Electrical Power Syste2017-11-17017 November 2017 Application to Modify the Technical Specifications for Browns Ferry (TS-512), Sequoyah (TS-17-03), and Watts Bar (TS-17-20) to Resolve the Open Phase Issue Identified in NRC Bulletin 2012-01, Design Vulnerability in Electrical Power System. Project stage: Request ML17347A0252017-12-12012 December 2017 NRR E-mail Capture - TVA Nuclear Plants - Acceptance for Review - Application to Modify the TSs for TVA Plants to Resolve Bl 2012-01 Issues Project stage: Acceptance Review ML18213A3192018-08-17017 August 2018 Sequoyah Nuclear Plant, and Watts Bar Nuclear Plant - Summary of Regulatory Audit to Support Review of License Amendment Request to Incorporate New Technical Specification for Unbalanced Voltage Relays Project stage: Approval CNL-18-130, Revised Application to Modify the Technical Specifications for Unbalanced Voltage Relays2018-11-19019 November 2018 Revised Application to Modify the Technical Specifications for Unbalanced Voltage Relays Project stage: Request CNL-19-023, Plants - Supplement to Application to Modify the Technical Specifications for the Browns Ferry Nuclear Plant (TS-512), Sequoyah Nuclear Plant (TS-17-03)and Watts Bar Nuclear Plant (TS-17-20) to ...2019-01-25025 January 2019 Plants - Supplement to Application to Modify the Technical Specifications for the Browns Ferry Nuclear Plant (TS-512), Sequoyah Nuclear Plant (TS-17-03)and Watts Bar Nuclear Plant (TS-17-20) to ... Project stage: Request ML18277A1102019-08-27027 August 2019 Units, 1 & 2 Issuance of Amendment Nos. 309, 332, 292, 345, 339, 128, and 31 Regarding Unbalanced Voltage Protection Project stage: Approval CNL-19-097, Non-Voluntary License Amendment Request to Correct Unbalanced Voltage Relay Instrumentation Values (TS-19-22)2019-10-23023 October 2019 Non-Voluntary License Amendment Request to Correct Unbalanced Voltage Relay Instrumentation Values (TS-19-22) Project stage: Request 2018-08-17
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Category:Letter
MONTHYEARIR 05000259/20244042024-09-0303 September 2024 Cyber Security Inspection Report 05000259/2024404 and 05000260-2024404 and 05000296/2024404-Cover Letter ML24247A2212024-08-29029 August 2024 Notification of Deviation from Pressurized Water Reactor Owners Group (PWROG) Letter OG-21-160, NEI 03-08 Needed Guidance: PWR Lower Radial Support Clevis Insert X-750 Bolt Inspection Requirements, September 1, 2021 ML24247A1802024-08-28028 August 2024 Application to Revise the Fuel Handling Accident Analysis, to Delete Technical Specification 3.9.4, Containment Penetrations, and to Modify Technical Specification 3.3.6, Containment Ventilation Isolation Instrumentation for Sequoyah Nuclea IR 05000390/20240052024-08-28028 August 2024 Updated Inspection Plan and Assessment Follow-Up Letter for Watts Bar Nuclear Plant, Units 1 and 2 - Report 05000390-2024005 and 05000391-2024005 IR 05000259/20240052024-08-26026 August 2024 Updated Inspection Plan for Browns Ferry Nuclear Plant, Units 1, 2 and 3 - Report 05000259/2024005, 05000260/2024005 and 05000296/2024005 IR 05000327/20240052024-08-26026 August 2024 Updated Inspection Plan for Sequoyah Nuclear Plant, Units 1 and 2 - Report 05000327/2024005 and 05000328/2024005 ML24239A3972024-08-23023 August 2024 Rssc Wire & Cable LLC Dba Marmon - Part 21 Final Notification - 57243-EN 57243 IR 05000390/20244022024-08-20020 August 2024 – Security Baseline Inspection Report 05000390-2024402 and 05000391/2024402 - Public CNL-24-061, Supplement to Application to Revise Function 5 of Technical Specification Table 3.3.2-1, ‘Engineered Safety Feature Actuation System Instrumentation,’ for the Sequoyah and Watts Bar (SQN-TS-23-02 and WBN-TS-23-08),”2024-08-19019 August 2024 Supplement to Application to Revise Function 5 of Technical Specification Table 3.3.2-1, ‘Engineered Safety Feature Actuation System Instrumentation,’ for the Sequoyah and Watts Bar (SQN-TS-23-02 and WBN-TS-23-08),” ML24219A0262024-08-12012 August 2024 Request for Withholding Information from Public Disclosure IR 05000390/20240022024-08-0707 August 2024 Integrated Inspection Report 05000390/2024002 and 05000391/2024002 Rev ML24219A0272024-08-0606 August 2024 Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations IR 05000259/20244022024-08-0606 August 2024 Security Baseline Inspection Report 05000259/2024402 and 05000260/2024402 and 05000296/2024402 IR 05000259/20240022024-08-0202 August 2024 Brown Ferry Nuclear Plant – Integrated Inspection Report05000259/2024002 and 05000260/2024002 and 05000296/2024002 IR 05000327/20240022024-07-31031 July 2024 Integrated Inspection Report 05000327/2024002 and 05000328/2024002 ML24211A0572024-07-29029 July 2024 Submittal of Emergency Plan Implementing Procedure Revision ML24211A0542024-07-29029 July 2024 Operator License Examination Report ML24211A0412024-07-26026 July 2024 Unit 1 Cycle 26 Refueling Outage - 90-Day Inservice Inspection Summary Report ML24204A2652024-07-25025 July 2024 Regulatory Audit Summary Related to Request to Revise Technical Specification Surveillance Requirement 3.9.5.1 to Reduce the Residual Heat Removal Flow Rate ML24199A0012024-07-22022 July 2024 Clarification and Correction to Exemption from Requirement of 10 CFR 37.11(c)(2) ML24172A1342024-07-15015 July 2024 Exemptions from 10 CFR 37.11(C)(2) (EPID L-2023-LLE-0024) - Letter ML24170A8002024-07-15015 July 2024 Issuance of Amendment Nos. 168 and 74 Regarding Revision to Technical Specification Table 1.1-1 for Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Bolts IR 05000390/20244402024-07-12012 July 2024 95001 Supplemental Inspection Supplemental Report 05000390-2024440 and 05000391-2024440 and Follow-Up Assessment Letter ML24183A4142024-07-10010 July 2024 – License Renewal Regulatory Limited Scope Audit Regarding the Environmental Review of the License Renewal Application (EPID Number: L-2024-SLE-0000) (Docket Numbers: 50-259, 50-260, and 50-296) ML24191A4652024-07-0909 July 2024 Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations ML24131A0012024-07-0202 July 2024 Issuance of Amendment Nos. 167 and 73 Regarding Adoption of Technical Specification Task Force Traveler TSTF-427-A, Revision 2 ML24184A1142024-07-0202 July 2024 Site Emergency Plan Implementing Procedure Revision ML24183A3842024-07-0101 July 2024 Registration of Use of Cask to Store Spent Fuel (MPC-364, -365) CNL-24-052, Response to Request for Additional Information Regarding Application to Modify the Technical Specification Surveillance Requirement 3.9.5.1 (WBN-TS-21-14)2024-06-27027 June 2024 Response to Request for Additional Information Regarding Application to Modify the Technical Specification Surveillance Requirement 3.9.5.1 (WBN-TS-21-14) ML24179A0282024-06-26026 June 2024 Evaluation of Effects of Out-of-Limits Condition as Described in IWB-3720(a) ML24177A0282024-06-25025 June 2024 Emergency Plan Implementing Procedure Revisions CNL-24-018, License Amendment Request for Adoption of Technical Specification Task Force Traveler TSTF-276-A, Revision 2, Regarding TS 3.8.1 AC Sources – Operating to Clarify Requirements for Diesel Generator Testing (WBN-TS2024-06-25025 June 2024 License Amendment Request for Adoption of Technical Specification Task Force Traveler TSTF-276-A, Revision 2, Regarding TS 3.8.1 AC Sources – Operating to Clarify Requirements for Diesel Generator Testing (WBN-TS ML24176A1132024-06-23023 June 2024 American Society of Mechanical Engineers, Section XI, Fourth 10 Year Inspection Interval, Inservice Inspection, System Pressure Test, Containment Inspection, and Repair and Replacement Programs, Owner’S Activity Report Cycle 21 Oper ML24175A0042024-06-23023 June 2024 Interim Report of a Deviation or Failure to Comply Associated with a Valve in the Unit 3 High Pressure Coolant Injection System ML24089A1152024-06-21021 June 2024 Transmittal Letter, Environmental Assessments and Findings of No Significant Impact Related to Exemption Requests from 10 CFR 37.11(c)(2) ML24155A0042024-06-18018 June 2024 Proposed Alternative to the Requirements of the ASME Code (Revised Alternative Request 0-ISI-47) ML24158A5312024-06-0606 June 2024 Registration of Use of Cask to Store Spent Fuel (MPC-361, -362, -363) ML24068A2612024-06-0505 June 2024 SLRA Fluence Methodology Report - Proprietary Determination Letter ML24071A0292024-06-0505 June 2024 Subsequent License Renewal Application Enclosure 3 - Proprietary Determination Letter ML24145A0852024-05-30030 May 2024 1B-B Diesel Generator Failure - Final Significance Determination Letter ML24145A1052024-05-29029 May 2024 301 Exam Approval Letter IR 05000259/20244032024-05-22022 May 2024 – Security Baseline Report 05000259/2024403 and 05000260/2024403 and 05000296/2024403 ML24141A0482024-05-17017 May 2024 EN 56958_1 Ametek Solidstate Controls, Inc ML24100A7642024-05-16016 May 2024 Issuance of Amendment No. 166 Regarding Revision to Technical Specification 3.8.2, AC Sources-Shutdown, to Remove Reference to C-S Diesel Generator (CNL-23-062) ML24136A0702024-05-15015 May 2024 2023 Annual Radiological Environmental Operating Report IR 05000259/20240012024-05-14014 May 2024 Integrated Inspection Report 05000259/2024001, 05000260/2024001, and 05000296/2024001 IR 05000390/20240012024-05-14014 May 2024 Integrated Inspection Report 05000390/2024001 and 05000391/2024001 ML24134A1762024-05-13013 May 2024 Submittal of 2023 Annual Radiological Environmental Operating Report CNL-24-040, Tennessee Valley Authority - Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2024-05-0808 May 2024 Tennessee Valley Authority - Central Emergency Control Center Emergency Plan Implementing Procedure Revisions ML24128A0352024-05-0707 May 2024 Providing Supplemental Information to Apparent Violation 2024-09-03
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 17, 2018 Mr. Joseph W. Shea Vice President, Nuclear Licensing Tennessee Valley Authority 11 01 Market Street, LP 4A Chattanooga, TN 37402-2801
SUBJECT:
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 -
SUMMARY
OF REGULATORY AUDIT TO SUPPORT REVIEW OF THE LICENSE AMENDMENT REQUEST TO INCORPORATE NEW TECHNICAL SPECIFICATION FOR UNBALANCED VOLTAGE RELAYS (EPID L-2017-LLA-0391)
Dear Mr. Shea:
By application dated November 17, 2017 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML17324A349), Tennessee Valley Authority (TVA, the licensee), submitted a request for an amendment to Renewed Facility Operating License Nos. DPR-33, DPR-52, and DPR-68 for the Browns Ferry Nuclear Plant, Units 1, 2, and 3; Renewed Facility Operating License Nos. DPR-77 and DPR-79 for the Sequoyah Nuclear Plant, Units 1 and 2; and Facility Operating License Nos. NPF-90 and NPF-96 for the Watts Bar Nuclear Plant, Units 1 and 2. This license amendment request (LAR), titled "Application to Modify the Technical Specifications for the Browns Ferry Nuclear Plant (TS-512), Sequoyah Nuclear Plant (TS-17-03) and Watts Bar Nuclear Plant (TS-17-20) to Resolve the Open Phase Issue Identified in NRC Bulletin 2012-01, 'Design Vulnerability in Electrical Power System',"
proposed addition of a new level of protection, "Unbalanced Voltage," to the Technical Specifications (TSs) for the loss of power instrumentation.
The U.S. Nuclear Regulatory Commission (NRC) staff reviewed the information provided by the licensee in the LAR and sent draft requests for additional information (RAls) to TVA on March 27, 2018. On March 29, 2018, NRC staff had a conference call with TVA staff to clarify the requested information. During the conference call, the licensee stated that the discussion in the LAR related to the issues identified in Bulletin 2012-01 was for informational purposes only and not intended to document the completion of actions for vulnerabilities discussed in Bulletin 2012-01.
Due to the complexity of the proposed new TSs, supporting calculations, proposed actions, design modifications, and computer-based modeling, the NRC staff determined the need for a regulatory audit to be conducted in accordance with the Office of Nuclear Reactor Regulation Office (NRR) Instruction LIC-111, "Regulatory Audits."
By letter dated April 20, 2018 (ADAMS Accession No. ML18103A018), the NRC staff issued its plan to conduct an audit in support of its review of the subject LAR. Subsequently, the NRC staff forwarded its revised draft RAls to TVA on April 23, 2018, for discussion during the audit.
J.Shea On May 1, 2018, and May 2, 2018, staff from NRR conducted the audit at the TVA corporate office in Chattanooga, Tennessee. The purpose of this regulatory audit was for the staff to obtain a better understanding of TVA's unique approach for resolving issues associated with Bulletin 2012-01 for TVA plants and bases for the proposed new TSs and the details on the clarifications required to evaluate the adequacy of proposed changes, and for TVA to provide better detailed responses to the RAls. During the audit, TVA staff clarified that while reviewing the consequences of an open phase condition (OPC), a vulnerability to unbalanced voltage (UV) conditions adverseiy impacting safety-related busses was identified at TVA plants. The UV conditions could exist due to several initiating events, including an OPC from the offsite or onsite power systems. The existing protective relay schemes comprising of loss of voltage and degraded voltage relays were not capable of detecting UV conditions. Therefore, TVA submitted this LAR to propose installation of unique UV relays. TVA staff also clarified that a separate document will be submitted to confirm actions taken to address vulnerabilities associated with OPCs discussed in Bulletin 2012-01.
Based on the discussions with the TVA staff and review of the documents during the audit, the NRC staff revised its draft RAls and issued the official RAls by letter dated May 21, 2018 (ADAMS Accession No. ML18115A379). The licensee's responses to the RAls were submitted to the NRC by letter dated June 18, 2018 (ADAMS Accession No. ML18169A404).
A list of audit participants is enclosed. If you have any questions, please contact me at (301) 415-1447 or Farideh.Saba@nrc.gov.
Sincerely, Farideh E. Saba, Senior Project Manager Plant Licensing 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-259, 50-260, 50-296, 50-327, 50-328, 50-390, and 50-391
Enclosure:
List of Audit Participants cc: Listserv
LIST OF AUDIT PARTICIPANTS Name Organization Jessie Quichocho U.S. Nuclear Regulatory Commission (NRC)
Gurcharan (Singh) Matharu NRC Robert Schaaf NRC Farideh Saba (partially)* NRC Pete Snyder* NRC Edward Schrull Tennessee Valley Authority (TVA)
Gordon Williams TVA Tammy Womack TVA Preston Cooper TVA Mike Durr (partially) TVA Ashley Taylor (partially) TVA Chase Hardeman (partially) TVA
J. Shea
SUBJECT:
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 -
SUMMARY
OF REGULATORY AUDIT TO SUPPORT REVIEW OF THE LICENSE AMENDMENT REQUEST TO INCORPORATE NEW TECHNICAL SPECIFICATION FOR UNBALANCED VOLTAGE RELAYS (EPID L-2017-LLA-0391) DATED AUGUST 17, 2018 DISTRIBUTION:
PUBLIC RidsACRS_MailCTR Resource RidsNrrDorl Resource RidsNrrDorlLpl2-2 Resource RidsNrrPMBrownsFerry Resource RidsNrrDeEeob Resource RidsNrrDssStsb Resource RidsNrrPMSequoyah Resource RidsNrrLABClayton Resource RidsRgn2MailCenter Resource RidsNrrPMWattsBar Resource GMatharu, NRR PSnyder, NRR ADAMS A ccess1on No.: ML18213A319 *b1y e-ma1*1 OFFICE DORL/LPLI 1-2/PM DORL/LPLI 1-2/LA DE/EE OB/BC*
NAME FSaba BClayton (LRonewicz for) JQuichocho DATE 08/13/2018 08/08/2018 08/06/2018 OFFICE NRR/DORL/LPL2-2/BC(A) NRR/DORL/LPL2-2/PM NAME BVenkataraman FSaba DATE 08/13/2018 08/17/2018 OFFICIAL RECORD COPY