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| | number = ML15314A061 | | | number = ML15314A061 |
| | issue date = 11/24/2015 | | | issue date = 11/24/2015 |
| | title = South Texas Project, Units 1 and 2-Mitigating Strategies Assessment with Respect to the Reevaluated Flood Hazards Submitted in Response to 10 CFR50.54(f) Information Request -Flood Causing Mechanism Reevaluation | | | title = Mitigating Strategies Assessment with Respect to the Reevaluated Flood Hazards Submitted in Response to 10 CFR50.54(f) Information Request -Flood Causing Mechanism Reevaluation |
| | author name = Uribe J F | | | author name = Uribe J |
| | author affiliation = NRC/NRR/JLD | | | author affiliation = NRC/NRR/JLD |
| | addressee name = Koehl D L | | | addressee name = Koehl D |
| | addressee affiliation = South Texas Project Nuclear Operating Co | | | addressee affiliation = South Texas Project Nuclear Operating Co |
| | docket = 05000498, 05000499 | | | docket = 05000498, 05000499 |
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| =Text= | | =Text= |
| {{#Wiki_filter:Mr. Dennis L. Koehl President and CEO/CNO UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 24, 2015 STP Nuclear Operating Company South Texas Project P.O. Box 289 Wadsworth, TX 77 483 SUBJECT: SOUTH TEXAS PROJECT, UNITS 1AND2-MITIGATING STRATEGIES ASSESSMENT WITH RESPECT TO THE REEVALUATED FLOOD HAZARDS SUBMITTED IN RESPONSE TO 10 CFR 50.54(f) INFORMATION REQUEST -FLOOD-CAUSING MECHANISM REEVALUATION (CAC NOS. MF1110 AND MF1111) Dear Mr. Koehl: The purpose of this letter is to describe the next steps following the review of the reevaluated flood hazard as directed by the Commission. Specifically, this letter addresses the next steps associated with the mitigation strategies assessment (MSA) with respect to the reevaluated flood hazard. By letter dated March 12, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 12053A340), the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 10 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 licensees to reevaluate flood-causing mechanisms using present-day methodologies and guidance. By letter dated March 11, 2013 (ADAMS Accession No ML 13079A806), STP Nuclear Operating Company (STP, the licensee) responded to this request for South Texas Project, Units 1 and 2 (STP). This response was supplemented by letters dated January 22, 2014 (ADAMS Accession No. ML 14041A336) and February 13, 2014 (ADAMS Accession No. ML 14056A195). By letter dated September 30, 2014 (ADAMS Accession No. ML 14259A195), the NRC staff transmitted to you its staff assessment of the information provided in the above mentioned letters. The NRC staff has completed its review of the information provided. The current flood hazard reevaluation approach is described in NRC letter dated September 1, 2015 (ADAMS Accession No. ML 15174A257), concerning the coordination of requests for information regarding flooding hazard reevaluations and mitigating strategies for basis external events. This letter describes the changes in the NRC's approach to the flood hazard reevaluations that were approved by the Commission in its Staff Requirements Memorandum (ADAMS Accession No. ML 15209A682) to COMSECY-15-0019 (ADAMS Accession No. ML 15153A104) that described the NRC's mitigating strategies and flooding hazard reevaluation action plan. | | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 24, 2015 Mr. Dennis L. Koehl President and CEO/CNO STP Nuclear Operating Company South Texas Project P.O. Box 289 Wadsworth, TX 77483 |
| D. Koehl -2 -As described in the staff assessment, the NRC staff confirmed that the licensee responded appropriately to Enclosure 2 of the 50.54(f) letter. The NRC staff confirmed that the reevaluated hazard results for each reevaluated flood-causing mechanism are bounded by the current design-basis flood hazard and an integrated assessment or a focused evaluation is not necessary for STP. The NRC staff has no additional information needs at this time with respect to Enclosure 2 of the 50.54(f) letter. The September 1, 2015, letter described expectations for sites to perform an assessment of their mitigation strategies with respect to the reevaluated hazard. The licensee is expected to perform an MSA for STP. The Nuclear Energy Institute (NEI) guidance document NEI 12-06, "Diverse and Flexible Coping Strategies (FLEX) Implementation Guide" is currently being revised. This revision will include a methodology to perform an MSA with respect to the reevaluated flood hazards. The NRC staff has concluded that the licensee's reevaluated hazard information is suitable for the assessment of mitigation strategies developed in response to Order EA-12-049 (i.e., defines the mitigation strategies flood hazard information described in the revised NEI 12-06 guidance currently being finalized by the industry and NRC staff). If you have any questions, please contact me at (301) 415-3809 or e-mail at Juan.Uribe@nrc.gov. Docket Nos. 50-498 and 50-499 cc: Distribution via Listserv Juan ribe, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation D. Koehl -2 -As described in the staff assessment, the NRC staff confirmed that the licensee responded appropriately to Enclosure 2 of the 50.54(f) letter. The NRC staff confirmed that the reevaluated hazard results for each reevaluated flood-causing mechanism are bounded by the current design-basis flood hazard and an integrated assessment or a focused evaluation is not necessary for STP. The NRC staff has no additional information needs at this time with respect to Enclosure 2 of the 50.54(f) letter. The September 1, 2015, letter described expectations for sites to perform an assessment of their mitigation strategies with respect to the reevaluated hazard. The licensee is expected to perform an MSA for STP. The Nuclear Energy Institute (NEI) guidance document NEI 12-06, "Diverse and Flexible Coping Strategies (FLEX) Implementation Guide" is currently being revised. This revision will include a methodology to perform an MSA with respect to the reevaluated flood hazards. The NRC staff has concluded that the licensee's reevaluated hazard information is suitable for the assessment of mitigation strategies developed in response to Order EA-12-049 (i.e., defines the mitigation strategies flood hazard information described in the revised NEI 12-06 guidance currently being finalized by the industry and NRC staff). If you have any questions, please contact me at (301) 415-3809 or e-mail at Juan.Uribe@nrc.gov. Sincerely, IRA! Juan Uribe, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499 cc: Distribution via Listserv DISTRIBUTION: PUBLIC VHall, NRR RidsNrrDorllpl4-1 Resource RidsRgn4MailCenter Resource RidsOpaMail Resource JThompson, NRO ARivera-Varona, NRO LQuinn-Willingham, NRO BHayes, NRO JLD R/F JUribe, NRR RidsNrrDorl Resource RidsNrrLASLent RidsAcrsAcnw_MailCtr Resource LHibler, NRO KErwin, NRO RidsNroDsea Resource RidsNRRJLD Resource MShams, NRR RidsNrrPMSouthTexas Resource RidsOgcMailCenter Resource PChaput, NRO CCook, NRO ACampbell, NRO MBensi, NRO ADAMS Accession No.: ML 15314A061 *via email OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NAME MMarshall SLent DATE 11/23/2015 11/23/2015 OFFICE NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME MS hams JUribe DATE 11/24/2015 11/24/2015 OFFICIAL RECORD COPY | | |
| }} | | ==SUBJECT:== |
| | SOUTH TEXAS PROJECT, UNITS 1AND2- MITIGATING STRATEGIES ASSESSMENT WITH RESPECT TO THE REEVALUATED FLOOD HAZARDS SUBMITTED IN RESPONSE TO 10 CFR 50.54(f) INFORMATION REQUEST - FLOOD-CAUSING MECHANISM REEVALUATION (CAC NOS. MF1110 AND MF1111) |
| | |
| | ==Dear Mr. Koehl:== |
| | |
| | The purpose of this letter is to describe the next steps following the review of the reevaluated flood hazard as directed by the Commission. Specifically, this letter addresses the next steps associated with the mitigation strategies assessment (MSA) with respect to the reevaluated flood hazard. |
| | By letter dated March 12, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340), the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 10 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 licensees to reevaluate flood-causing mechanisms using present-day methodologies and guidance. By letter dated March 11, 2013 (ADAMS Accession No ML13079A806), STP Nuclear Operating Company (STP, the licensee) responded to this request for South Texas Project, Units 1 and 2 (STP). This response was supplemented by letters dated January 22, 2014 (ADAMS Accession No. ML14041A336) and February 13, 2014 (ADAMS Accession No. ML14056A195). By letter dated September 30, 2014 (ADAMS Accession No. ML14259A195), the NRC staff transmitted to you its staff assessment of the information provided in the above mentioned letters. The NRC staff has completed its review of the information provided. |
| | The current flood hazard reevaluation approach is described in NRC letter dated September 1, 2015 (ADAMS Accession No. ML15174A257), concerning the coordination of requests for information regarding flooding hazard reevaluations and mitigating strategies for beyond-design-basis external events. This letter describes the changes in the NRC's approach to the flood hazard reevaluations that were approved by the Commission in its Staff Requirements Memorandum (ADAMS Accession No. ML15209A682) to COMSECY-15-0019 (ADAMS Accession No. ML15153A104) that described the NRC's mitigating strategies and flooding hazard reevaluation action plan. |
| | |
| | D. Koehl As described in the staff assessment, the NRC staff confirmed that the licensee responded appropriately to Enclosure 2 of the 50.54(f) letter. The NRC staff confirmed that the reevaluated hazard results for each reevaluated flood-causing mechanism are bounded by the current design-basis flood hazard and an integrated assessment or a focused evaluation is not necessary for STP. The NRC staff has no additional information needs at this time with respect to Enclosure 2 of the 50.54(f) letter. |
| | The September 1, 2015, letter described expectations for sites to perform an assessment of their mitigation strategies with respect to the reevaluated hazard. The licensee is expected to perform an MSA for STP. The Nuclear Energy Institute (NEI) guidance document NEI 12-06, "Diverse and Flexible Coping Strategies (FLEX) Implementation Guide" is currently being revised. This revision will include a methodology to perform an MSA with respect to the reevaluated flood hazards. The NRC staff has concluded that the licensee's reevaluated hazard information is suitable for the assessment of mitigation strategies developed in response to Order EA-12-049 (i.e., defines the mitigation strategies flood hazard information described in the revised NEI 12-06 guidance currently being finalized by the industry and NRC staff). |
| | If you have any questions, please contact me at (301) 415-3809 or e-mail at Juan.Uribe@nrc.gov. |
| | Juan ribe, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499 cc: Distribution via Listserv |
| | |
| | ML15314A061 *via email OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NAME MMarshall SLent DATE 11/23/2015 11/23/2015 OFFICE NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME MS hams JUribe DATE 11/24/2015 11/24/2015}} |
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MONTHYEARML15314A0612015-11-24024 November 2015 Mitigating Strategies Assessment with Respect to the Reevaluated Flood Hazards Submitted in Response to 10 CFR50.54(f) Information Request -Flood Causing Mechanism Reevaluation Project stage: Other 2015-11-24
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Category:Letter
MONTHYEARML24029A2752024-01-29029 January 2024 Request to Reschedule Evaluated Force-on-Force Drill IR 05000498/20230042024-01-29029 January 2024 Integrated Inspection Report 05000498/2023004 and 05000499/2023004 ML24024A1162024-01-24024 January 2024 STP Unit 2 Request for Information IR 05000498/20244042024-01-18018 January 2024 Information Request for the Cyber-Security Baseline Inspection, Notification to Perform Inspection 05000498/2024404; 05000499/2024404 IR 05000498/20230032023-12-28028 December 2023 Acknowledgment of Reply to a Notice of Violation (NRC Inspection Report 05000498/2023003 and 05000499/2023003) ML23360A1692023-12-26026 December 2023 FEMA, Submittal of Radiological Emergency Preparedness Final Report for the South Texas Project Medical Services Drill Evaluated on August 31, 2023 NOC-AE-230040, Supplement to Proposed Alternate Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection (Relief Request RR-ENG-4-06)2023-12-14014 December 2023 Supplement to Proposed Alternate Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection (Relief Request RR-ENG-4-06) NOC-AE-230039, Docket Nos. Stn 50-498, Stn 50-499 - Reply to a Notice of Violation, NRC Inspection Report 05000498/2023003 and 05000499/20230032023-12-12012 December 2023 Docket Nos. Stn 50-498, Stn 50-499 - Reply to a Notice of Violation, NRC Inspection Report 05000498/2023003 and 05000499/2023003 ML23326A2592023-12-0505 December 2023 Review of the Fall 2022 Steam Generator Tube Inspection Report ML23339A1902023-12-0505 December 2023 Update Foreign Ownership, Control, or Influence (FOCI) IR 05000498/20234012023-12-0404 December 2023 Security Baseline Inspection Report 05000498/2023401 and 05000499/2023401 ML23324A0102023-11-16016 November 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23310A2282023-11-13013 November 2023 Integrated Inspection Report 05000498/2023003 and 05000499/2023003, and Notice of Violation ML23311A2082023-11-0909 November 2023 Reassignment of U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch IV ML23298A0002023-11-0101 November 2023 the Associated Independent Spent Fuel Storage Installation - Issuance of Amendment Nos. 226 and 211 Related to Order Approving Indirect Transfer of Licenses and Conforming License Amendments ML23303A0782023-10-30030 October 2023 Submittal of Supplemental Information in Response to Order Consenting to License Transfers and Approval of Draft Conforming License Amendments ML23279A0342023-10-30030 October 2023 Associated Independent Spent Fuel Storage Installation - Order Approving Indirect Transfer of Licenses and Draft Conforming License Amendments (EPID L-2023-LLM-0004) (Letter) IR 05000498/20234032023-10-26026 October 2023 Material Control and Accounting Program Inspection Report 05000498/2023403 and 05000499/2023403 (Cover Letter) ML23317A1262023-10-12012 October 2023 South. Texas Project Physical Security Plan, Training and Qualification Plan, Safeguards Contingency Plan, and Independent Spent Fuel Storage Installation Security Program Revision 26 ML23279A1382023-10-0505 October 2023 Responses to Requests for Additional Information Related to Application for Order Approving Indirect Transfer of Control of Licenses ML23271A1942023-10-0303 October 2023 Notification of Commercial Grade Dedication Inspection (05000498/2024013 and 05000499/2024013) and Request for Information ML23270B2592023-09-27027 September 2023 Update Foreign Ownership, Control, or Influence ML23263B1132023-09-20020 September 2023 Operator Licensing Examination Schedule Revision 1 IR 05000498/20243012023-09-0707 September 2023 Notification of NRC Initial Operator Licensing Examination 05000498/2024301; 05000499/2024301 IR 05000498/20233012023-09-0101 September 2023 NRC Examination Report 05000498/2023301 and 05000499/2023301 ML23243B0562023-08-31031 August 2023 Supplemental Information to Application for Order Approving Indirect Transfer of Control of Licenses ML23236A6042023-08-24024 August 2023 Annual Dose Report for 2022 IR 05000498/20230052023-08-22022 August 2023 Updated Inspection Plan for South Texas Project Electric Generating Station, Units 1 and 2 (Report 05000498/2023005 and 05000499/2023005) - Mid Cycle Letter ML23229A5262023-08-17017 August 2023 Inservice Inspection Summary Report - 1 RE24, ML23229A5892023-08-17017 August 2023 Voluntary Response to Regulatory Issue Summary (RIS) 2023-02, Scheduling Information for the Licensing of Accident Tolerant, Increased Enrichment, and Higher Burnup Fuels ML23229A4992023-08-17017 August 2023 Supplement to Proposed Alternate Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection (Relief Request RR-ENG-4-06) ML23228A2102023-08-15015 August 2023 Closure of Investigation (OI 4-22-19) ML23222A0322023-08-10010 August 2023 Report of Changes Made to Quality Assurance Program for Radioactive Material Packages ML23221A3002023-08-0909 August 2023 RE22 Inspection Summary Report for Steam Generator Tubinq, Rev. 1 (Epld L-2023-LRO-0029) ML23222A2792023-08-0909 August 2023 Submittal of Update Foreign Ownership, Control, or Influence (FOCI) IR 05000498/20230022023-07-28028 July 2023 Integrated Inspection Report 05000498/2023002 and 05000499/2023002 ML23198A0532023-07-24024 July 2023 Request for Withholding Information from Public Disclosure ML23188A1612023-07-14014 July 2023 the Associated ISFSI - Notice of Consideration of Approval of Indirect Transfer of Licenses and Conforming Amendments and Opportunity to Request a Hearing (EPID L-2023-LLM-0004) - Letter ML23193A9932023-07-11011 July 2023 Submittal of Update Foreign Ownership, Control or Influence (FOCI) ML23192A0482023-07-11011 July 2023 NRC Initial Operator Licensing Examination Approval 05000498/2023301; 05000499/2023301 NOC-AE-230039, Submittal of Update Foreign Ownership, Control or Influence (FOCI)2023-07-11011 July 2023 Submittal of Update Foreign Ownership, Control or Influence (FOCI) ML23180A2822023-06-29029 June 2023 Operator Licensing Examination Schedule ML23177A2522023-06-26026 June 2023 Units 1, 2 & Independent Spent Fuel Storage Installation - Biennial Submittal of Technical Specification Bases Changes, Commitment Changes, 10 CFR 50.59 Evaluation Summary, and 10 CFR 72.48 Evaluation Summary ML23166B0802023-06-14014 June 2023 Update Foreign Ownership, Control, or Influence (FOCI) ML23163A1762023-06-12012 June 2023 Application for Order Approving Indirect Transfer of Control of Licenses 2024-01-29
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Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 24, 2015 Mr. Dennis L. Koehl President and CEO/CNO STP Nuclear Operating Company South Texas Project P.O. Box 289 Wadsworth, TX 77483
SUBJECT:
SOUTH TEXAS PROJECT, UNITS 1AND2- MITIGATING STRATEGIES ASSESSMENT WITH RESPECT TO THE REEVALUATED FLOOD HAZARDS SUBMITTED IN RESPONSE TO 10 CFR 50.54(f) INFORMATION REQUEST - FLOOD-CAUSING MECHANISM REEVALUATION (CAC NOS. MF1110 AND MF1111)
Dear Mr. Koehl:
The purpose of this letter is to describe the next steps following the review of the reevaluated flood hazard as directed by the Commission. Specifically, this letter addresses the next steps associated with the mitigation strategies assessment (MSA) with respect to the reevaluated flood hazard.
By letter dated March 12, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340), the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 10 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 licensees to reevaluate flood-causing mechanisms using present-day methodologies and guidance. By letter dated March 11, 2013 (ADAMS Accession No ML13079A806), STP Nuclear Operating Company (STP, the licensee) responded to this request for South Texas Project, Units 1 and 2 (STP). This response was supplemented by letters dated January 22, 2014 (ADAMS Accession No. ML14041A336) and February 13, 2014 (ADAMS Accession No. ML14056A195). By letter dated September 30, 2014 (ADAMS Accession No. ML14259A195), the NRC staff transmitted to you its staff assessment of the information provided in the above mentioned letters. The NRC staff has completed its review of the information provided.
The current flood hazard reevaluation approach is described in NRC letter dated September 1, 2015 (ADAMS Accession No. ML15174A257), concerning the coordination of requests for information regarding flooding hazard reevaluations and mitigating strategies for beyond-design-basis external events. This letter describes the changes in the NRC's approach to the flood hazard reevaluations that were approved by the Commission in its Staff Requirements Memorandum (ADAMS Accession No. ML15209A682) to COMSECY-15-0019 (ADAMS Accession No. ML15153A104) that described the NRC's mitigating strategies and flooding hazard reevaluation action plan.
D. Koehl As described in the staff assessment, the NRC staff confirmed that the licensee responded appropriately to Enclosure 2 of the 50.54(f) letter. The NRC staff confirmed that the reevaluated hazard results for each reevaluated flood-causing mechanism are bounded by the current design-basis flood hazard and an integrated assessment or a focused evaluation is not necessary for STP. The NRC staff has no additional information needs at this time with respect to Enclosure 2 of the 50.54(f) letter.
The September 1, 2015, letter described expectations for sites to perform an assessment of their mitigation strategies with respect to the reevaluated hazard. The licensee is expected to perform an MSA for STP. The Nuclear Energy Institute (NEI) guidance document NEI 12-06, "Diverse and Flexible Coping Strategies (FLEX) Implementation Guide" is currently being revised. This revision will include a methodology to perform an MSA with respect to the reevaluated flood hazards. The NRC staff has concluded that the licensee's reevaluated hazard information is suitable for the assessment of mitigation strategies developed in response to Order EA-12-049 (i.e., defines the mitigation strategies flood hazard information described in the revised NEI 12-06 guidance currently being finalized by the industry and NRC staff).
If you have any questions, please contact me at (301) 415-3809 or e-mail at Juan.Uribe@nrc.gov.
Juan ribe, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499 cc: Distribution via Listserv
ML15314A061 *via email OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NAME MMarshall SLent DATE 11/23/2015 11/23/2015 OFFICE NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME MS hams JUribe DATE 11/24/2015 11/24/2015