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| | issue date = 07/13/2016 | | | issue date = 07/13/2016 |
| | title = Staff Assessment of the Response to 10 CFR 50.54(f) Information Request - Flood Causing Mechanism Reevaluations(Public)(Cac Nos. MF6032 and MF6033) | | | title = Staff Assessment of the Response to 10 CFR 50.54(f) Information Request - Flood Causing Mechanism Reevaluations(Public)(Cac Nos. MF6032 and MF6033) |
| | author name = Uribe J F | | | author name = Uribe J |
| | author affiliation = NRC/NRR/JLD | | | author affiliation = NRC/NRR/JLD |
| | addressee name = Shea J | | | addressee name = Shea J |
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| ==Dear Mr. Shea:== | | ==Dear Mr. Shea:== |
| By letter dated March 12 , 2012 , the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 1 O of the Code of Federal Regulations , Section 50.54(f) (hereafter referred to as the 50.54(f) letter). The request was issued as part of implementing lessons-learned from the accident at the Fukushima Dai-ichi nuclear power plant. Enclosure 2 to the 50.54(f) letter requested l i censees to reevaluate flood-causing mechanisms using present-day methodologies and guidance. By letter dated March 12 , 2015 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 15071 A462), Tennessee Valley Authority (TVA , the licensee) responded to this request for Sequoyah Nuclear Plant , Units 1 and 2 (Sequoyah). By letter dated September 3 , 2015 (ADAMS Accession No. ML 15240A 163), the NRC staff sent TVA a summary of the staff's review of the licensee's reevaluated flood-causing mechanisms. | | By letter dated March 12 , 2012 , the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 1 O of the Code of Federal Regulations , Section 50.54(f) (hereafter referred to as the 50.54(f) letter). The request was issued as part of implementing lessons-learned from the accident at the Fukushima Dai-ichi nuclear power plant. Enclosure 2 to the 50.54(f) letter requested l i censees to reevaluate flood-causing mechanisms using present-day methodologies and guidance. By letter dated March 12 , 2015 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15071A462), Tennessee Valley Authority (TVA , the licensee) responded to this request for Sequoyah Nuclear Plant , Units 1 and 2 (Sequoyah). By letter dated September 3 , 2015 (ADAMS Accession No. ML15240A163), the NRC staff sent TVA a summary of the staff's review of the licensee's reevaluated flood-causing mechanisms. |
| The enclosed staff assessment provides the documentation supporting the NRC staff's conclus i ons summarized in the letter. As stated in the letter , the reevaluated flood hazard results for local intense precipitation and streams and rivers were not bounded by the current design-basis flood hazard. In order to complete its response to Enclosure 2 to the 50.54(f) letter , the licensee is expected to submit a focused evaluation or an integrated assessment , as appropriate , to address these reevaluated flood hazards , as described in the NRC's September 1 , 2015 , letter (ADAMS Accession No. ML 15174A257). The Enclosure transmitted herewith contains Security-Related Information. | | The enclosed staff assessment provides the documentation supporting the NRC staff's conclus i ons summarized in the letter. As stated in the letter , the reevaluated flood hazard results for local intense precipitation and streams and rivers were not bounded by the current design-basis flood hazard. In order to complete its response to Enclosure 2 to the 50.54(f) letter , the licensee is expected to submit a focused evaluation or an integrated assessment , as appropriate , to address these reevaluated flood hazards , as described in the NRC's September 1 , 2015 , letter (ADAMS Accession No. ML15174A257). The Enclosure transmitted herewith contains Security-Related Information. |
| When sep arated from the Enclosure, this document is decontrolled. | | When sep arated from the Enclosure, this document is decontrolled. |
| OFFICIAL USE ONLY SECURITY RELATED INFORMATION OFFICIAL USE ONLY SECURITY RELATED INFORMATION J. Shea If you have any questions, please contact me at (301) 415-3809 or e-mail at Juan.Uribe@nrc.gov. | | OFFICIAL USE ONLY SECURITY RELATED INFORMATION OFFICIAL USE ONLY SECURITY RELATED INFORMATION J. Shea If you have any questions, please contact me at (301) 415-3809 or e-mail at Juan.Uribe@nrc.gov. |
Revision as of 01:54, 20 June 2019
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MONTHYEARML16194A1152016-07-13013 July 2016 Staff Assessment of the Response to 10 CFR 50.54(f) Information Request - Flood Causing Mechanism Reevaluations(Public) Project stage: Other 2016-07-13
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Category:Letter
MONTHYEARCNL-24-047, Decommitment of Flood Mode Mitigation Improvement Systems2024-09-24024 September 2024 Decommitment of Flood Mode Mitigation Improvement Systems CNL-24-060, Supplement to Request for Approval of the Tennessee Valley Authority Nuclear Quality Assurance Program Description2024-09-24024 September 2024 Supplement to Request for Approval of the Tennessee Valley Authority Nuclear Quality Assurance Program Description ML24262A0602024-09-23023 September 2024 Summary of August 19, 2024, Meeting with Tennessee Valley Authority Regarding a Proposed Supplement to the Tennessee Valley Authority Nuclear Quality Assurance Plan ML24267A0402024-09-19019 September 2024 Cycle 27 Core Operating Limits Report Revision 0 ML24185A1742024-09-18018 September 2024 Cover Letter - Issuance of Exemption Related to Non-Destructive Examination Compliance Regarding Sequoyah Nuclear Plant Independent Spent Fuel Storage Installation CNL-24-065, Tennessee Valley Authority – Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2024-09-18018 September 2024 Tennessee Valley Authority – Central Emergency Control Center Emergency Plan Implementing Procedure Revisions ML24253A0152024-09-0808 September 2024 Emergency Plan Implementing Procedure Revisions 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 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 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), IR 05000327/20240022024-07-31031 July 2024 Integrated Inspection Report 05000327/2024002 and 05000328/2024002 ML24211A0542024-07-29029 July 2024 Operator License Examination Report ML24211A0572024-07-29029 July 2024 Submittal of Emergency Plan Implementing Procedure Revision ML24211A0412024-07-26026 July 2024 Unit 1 Cycle 26 Refueling Outage - 90-Day Inservice Inspection Summary Report 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 ML24191A4652024-07-0909 July 2024 Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations ML24177A0282024-06-25025 June 2024 Emergency Plan Implementing Procedure Revisions ML24176A0222024-06-24024 June 2024 Retraction of Interim Report of a Deviation or Failure to Comply – Transducer Model 8005N 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) ML24145A0852024-05-30030 May 2024 1B-B Diesel Generator Failure - Final Significance Determination Letter ML24145A1052024-05-29029 May 2024 301 Exam Approval Letter 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 ML24120A0582024-04-26026 April 2024 10 CFR 50.46 Annual Report for Sequoyah Nuclear Plant Units 1 and 2 ML24116A2612024-04-25025 April 2024 Interim Report of a Deviation or Failure to Comply - Transducer Model 8005N ML24114A0482024-04-23023 April 2024 Annual Radioactive Effluent Release Report for 2023 Monitoring Period CNL-24-037, Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Unit 1 and 2, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 422024-04-22022 April 2024 Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Unit 1 and 2, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 42 ML24144A2322024-04-20020 April 2024 Tennessee Multi-Sector Permit (Tmsp), 2024 Annual Discharge Monitoring Report for Outfalls SW-3, SW-3, and SW-9 ML24144A2362024-04-20020 April 2024 Discharge Monitoring Report (Dmr), March 2024 ML24102A1212024-04-18018 April 2024 Summary of Conference Call with Tennessee Valley Authority Regarding Sequoyah Nuclear Plant, Unit 1 Spring 2024 Steam Generator Tube Inspections ML24089A0882024-04-18018 April 2024 – Exemption from Select Requirements of 10 CFR Part 73; Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting CNL-24-033, Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2024-04-17017 April 2024 Central Emergency Control Center Emergency Plan Implementing Procedure Revisions IR 05000327/20240012024-04-17017 April 2024 Integrated Inspection Report 05000327/2024001 and 05000328/2024001 CNL-24-024, Hydrologic Engineering Center River Analysis System Project Milestone Status Update2024-04-17017 April 2024 Hydrologic Engineering Center River Analysis System Project Milestone Status Update ML24109A0272024-04-16016 April 2024 Cycle 27 Core Operating Limits Report Revision 0 CNL-23-006, Application to Modify Technical Specifications 3.8.1, AC Sources – Operating, and 3.8.2, AC Sources – Shutdown, for Sequoyah Nuclear Plant (SQN-TSC-22-03)2024-04-15015 April 2024 Application to Modify Technical Specifications 3.8.1, AC Sources – Operating, and 3.8.2, AC Sources – Shutdown, for Sequoyah Nuclear Plant (SQN-TSC-22-03) ML24106A0502024-04-12012 April 2024 Discharge Monitoring Report (Dmr), February 2024 ML24100A0162024-04-11011 April 2024 Request for Regulatory Conference (Tennessee Valley Authority - Sequoyah Nuclear Plant) CNL-24-020, Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Units 1 and 2, Request for Approval of Quality Assurance Program Description and Application to Revise the Technical Specifications Associated with QAPD Requirements2024-04-0101 April 2024 Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Units 1 and 2, Request for Approval of Quality Assurance Program Description and Application to Revise the Technical Specifications Associated with QAPD Requirements ML24088A0332024-03-28028 March 2024 Request for Regulatory Conference (Tennessee Valley Authority) CNL-24-008, Guarantee of Payment of Deferred Premiums - 2023 Annual Report2024-03-27027 March 2024 Guarantee of Payment of Deferred Premiums - 2023 Annual Report CNL-24-007, Annual Insurance Status Report2024-03-27027 March 2024 Annual Insurance Status Report ML24040A2062024-03-26026 March 2024 Issuance of Amendment Nos. 367 and 361 Regarding Changes to the Hydrologic Analyses (EPID L-2020-LLA-0004) - Public IR 05000327/20240902024-03-19019 March 2024 NRC Inspection Report 05000327-2024090 and 05000328-2024090 and Preliminary Greater than Green Finding and Apparent Violation CNL-24-027, Response to Request for Additional Information Regarding Sequoyah Nuclear Plant, Units 1 and 2, Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2024-03-14014 March 2024 Response to Request for Additional Information Regarding Sequoyah Nuclear Plant, Units 1 and 2, Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation CNL-24-029, Response to Request for Additional Information Regarding Tennessee Valley Authority - Request for Exemption from Specific Requirements of 10 CFR Part 372024-03-14014 March 2024 Response to Request for Additional Information Regarding Tennessee Valley Authority - Request for Exemption from Specific Requirements of 10 CFR Part 37 2024-09-08
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OFFICIAL USE ONLY SECURITY RELATED INFORMATION UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON , D.C. 20555-0001 July 13 , 2016 Mr. Joseph W. Shea Vice President , Nuclear Licensing Tennessee Valley Authority 1101 Market Street , LP 3R-C Chattanooga , TN 37402-2801
SUBJECT:
SEQUOYAH NUCLEAR PLANT , UNITS 1AND2-STAFF ASSESSMENT OF RESPONSE TO 10 CFR 50.54(f) INFORMATION REQUEST-CAUSING MECHANISM REEVALUATION (CAC NOS. MF6032 AND MF6033)
Dear Mr. Shea:
By letter dated March 12 , 2012 , the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 1 O of the Code of Federal Regulations , Section 50.54(f) (hereafter referred to as the 50.54(f) letter). The request was issued as part of implementing lessons-learned from the accident at the Fukushima Dai-ichi nuclear power plant. Enclosure 2 to the 50.54(f) letter requested l i censees to reevaluate flood-causing mechanisms using present-day methodologies and guidance. By letter dated March 12 , 2015 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15071A462), Tennessee Valley Authority (TVA , the licensee) responded to this request for Sequoyah Nuclear Plant , Units 1 and 2 (Sequoyah). By letter dated September 3 , 2015 (ADAMS Accession No. ML15240A163), the NRC staff sent TVA a summary of the staff's review of the licensee's reevaluated flood-causing mechanisms.
The enclosed staff assessment provides the documentation supporting the NRC staff's conclus i ons summarized in the letter. As stated in the letter , the reevaluated flood hazard results for local intense precipitation and streams and rivers were not bounded by the current design-basis flood hazard. In order to complete its response to Enclosure 2 to the 50.54(f) letter , the licensee is expected to submit a focused evaluation or an integrated assessment , as appropriate , to address these reevaluated flood hazards , as described in the NRC's September 1 , 2015 , letter (ADAMS Accession No. ML15174A257). The Enclosure transmitted herewith contains Security-Related Information.
When sep arated from the Enclosure, this document is decontrolled.
OFFICIAL USE ONLY SECURITY RELATED INFORMATION OFFICIAL USE ONLY SECURITY RELATED INFORMATION J. Shea If you have any questions, please contact me at (301) 415-3809 or e-mail at Juan.Uribe@nrc.gov.
Docket Nos. 50-327 and 50-328
Enclosure:
Staff Assessment of Flood Hazard Reevaluation Report cc w/o encl: Distribution via Listserv Ju n Uribe, Pro ct Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation OFFICIAL USE ONLY*SECURITY RELATED INFORMATION OFFICIAL USE ONLY SECURITY RELATED INFORMATION J.Shea Th i s closes out the NRC's efforts associated with CAC Nos. MF6032 and MF6033. If you have any questions , please contact me at (301) 415-3809 or e-mail at Juan.Uribe@nrc.gov. Docket Nos. 50-327 and 50-328
Enclosure:
Staff Assessment of Flood Hazard Reevaluation Report Sincerely , IRA/ Juan Uribe , Project Manager Hazards Management Branch Japan Lessons-Learned Division Off i ce of Nuclear Reactor Regulation cc w/encl: Distribut i on via ListseN DISTRIBUTION
- PUBLIC JUribe , NRA GBowman , NRA RidsNrrDorllpl2-2Resource RidsOpaMail Resource ACampbell , NRO MMcBride , NAO MW i llingham , NAO ARivera-Varona , NAO JLD R/F MShams , NRA YCheng , NAO RidsNrrDorl Resource RidsNrrLASLent SBreithaupt , NAO RidsNroDsea Resource CCook , NAO RidsNRRJLD Resource JDavis , NRA RidsNrrPMSequoyah Resource RidsRgn2MailCenter RidsOgcMailCenter Resource MBensi , NAO RidsNrrJLD Resource RidsAcrsAcnw
_Ma i lCtr Resource ADAMS Accession Nos.: Letter: ML16194A115 (PUBLIC), ML16188A274 NON-PUBLIC)
- via email OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA N RO/DSEA/RHM2/BC NAME JUribe SLent CCook DATE 07/07/2016 07/07/2016 06/29/2016 OFFICE NRR/JLD/JHMB/BC(A)
NRR/JLD/JHMB/PM NAME GBowman JUribe DATE 07/13/2016 07/13/2016 OFFICIAL RECORD COPY OFFICIAL USE ONLY SECURITY RELATED INFORMATION