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| | number = ML16279A331 | | | number = ML16279A331 |
| | issue date = 10/27/2016 | | | issue date = 10/27/2016 |
| | title = 09/14/16 Summary of Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2400-MF2409) | | | title = Summary of Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2400-MF2409) |
| | author name = Regner L M | | | author name = Regner L |
| | author affiliation = NRC/NRR/DORL/LPLIV-1 | | | author affiliation = NRC/NRR/DORL/LPLIV-1 |
| | addressee name = Powell G T | | | addressee name = Powell G |
| | addressee affiliation = South Texas Project Nuclear Operating Co | | | addressee affiliation = South Texas Project Nuclear Operating Co |
| | docket = 05000498, 05000499 | | | docket = 05000498, 05000499 |
| | license number = NPF-076, NPF-080 | | | license number = NPF-076, NPF-080 |
| | contact person = Regner L M | | | contact person = Regner L |
| | case reference number = CAC MF2400, CAC MF2401, CAC MF2402, CAC MF2403, CAC MF2404, CAC MF2405, CAC MF2406, CAC MF2407, CAC MF2408, CAC MF2409 | | | case reference number = CAC MF2400, CAC MF2401, CAC MF2402, CAC MF2403, CAC MF2404, CAC MF2405, CAC MF2406, CAC MF2407, CAC MF2408, CAC MF2409 |
| | document type = Meeting Summary | | | document type = Meeting Summary |
| | page count = 5 | | | page count = 5 |
| | project = CAC:MF2400, CAC:MF2401, CAC:MF2402, CAC:MF2403, CAC:MF2404, CAC:MF2405, CAC:MF2406, CAC:MF2407, CAC:MF2408, CAC:MF2409 | | | project = CAC:MF2400, CAC:MF2401, CAC:MF2402, CAC:MF2403, CAC:MF2404, CAC:MF2405, CAC:MF2406, CAC:MF2407, CAC:MF2408, CAC:MF2409 |
| | stage = Supplement | | | stage = Meeting |
| }} | | }} |
|
| |
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| =Text= | | =Text= |
| {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 27, 2016 LICENSEE: | | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 27, 2016 LICENSEE: STP Nuclear Operating Company FACILITY: South Texas Project, Units 1 and 2 |
| STP Nuclear Operating Company FACILITY: | |
| South Texas Project, Units 1 and 2 | |
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| ==SUBJECT:== | | ==SUBJECT:== |
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| SUMMARY OF SEPTEMBER 14, 2016, PUBLIC CONFERENCE CALL WITH STP NUCLEAR OPERATING COMPANY TO DISCUSS THE LICENSE AMENDMENT AND EXEMPTION REQUESTS TO USE A RISK-INFORMED APPROACH TO THE RESOLUTION OF GENERIC SAFETY ISSUE 191, "ASSESSMENT OF DEBRIS ACCUMULATION ON PWR SUMP PERFORMANCE" (CAC NOS. MF2400, MF2401, MF2402, MF2403, MF2404, MF2405, MF2406, MF2407, MF2408, AND MF2409) On September 14, 2016, a Category 1 public conference call was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of STP Nuclear Operating Company (STPNOC, the licensee), | | ==SUMMARY== |
| at NRC Headquarters, Rockville, Maryland. | | OF SEPTEMBER 14, 2016, PUBLIC CONFERENCE CALL WITH STP NUCLEAR OPERATING COMPANY TO DISCUSS THE LICENSE AMENDMENT AND EXEMPTION REQUESTS TO USE A RISK-INFORMED APPROACH TO THE RESOLUTION OF GENERIC SAFETY ISSUE 191, "ASSESSMENT OF DEBRIS ACCUMULATION ON PWR SUMP PERFORMANCE" (CAC NOS. MF2400, MF2401, MF2402, MF2403, MF2404, MF2405, MF2406, MF2407, MF2408, AND MF2409) |
| The meeting notice and agenda, dated September 1, 2016, are located in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML 16258A451. | | On September 14, 2016, a Category 1 public conference call was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of STP Nuclear Operating Company (STPNOC, the licensee), at NRC Headquarters, Rockville, Maryland. The meeting notice and agenda, dated September 1, 2016, are located in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML16258A451. A list of meeting attendees is provided in the Enclosure to this meeting summary. |
| A list of meeting attendees is provided in the Enclosure to this meeting summary. | | By letter dated June 19, 2013 (ADAMS Package Accession No. ML131750250), as supplemented by letters dated October 3, October 31, November 13, November 21 and December 23, 2013 (two letters); January 9, February 13, February 27, March 17, March 18, May 15 (two letters), May 22, June 25, and July 15, 2014; March 10, March 25, and August 20, 2015; and April 13, May 11, June 9, June 16, July, 18, July 21 (two letters), July 28, 2016 (ADAMS Accession Nos. ML13295A222, ML13323A673, ML13323A128, ML13338A165, ML14015A312, ML14015A311, ML14029A533, ML14052A110, ML14072A075, ML14086A383, ML14087A126, ML14149A353, ML14149A354, ML14149A439, ML14178A467, ML14202A045, ML15072A092, ML15091A440, ML15246A125, ML16111B204, ML16154A117, ML16176A148, ML16196A241, ML16209A226, ML16229A189, ML16230A232, and ML16221A393, respectively), STPNOC submitted exemption requests accompanied by a license amendment request for a risk-informed approach to resolve Generic Safety Issue (GSl)-191, "Assessment of Debris Accumulation on PWR [Pressurized-Water Reactor] Sump Performance,'' at South Texas Project, Units 1 and 2 (STP). |
| By letter dated June 19, 2013 (ADAMS Package Accession No. ML 131750250), | | The purpose of this public meeting was to discuss the NRC staff's remaining unresolved concerns associated with the licensee's August 20, 2015, document, which provided information on STPNOC's revised methodology to resolve GSl-191 using a risk methodology combined with a deterministic methodology - 'Risk over Deterministic' or 'RoverD.' The meeting focused on the NRC staff's questions following the request for additional information (RAI) responses provided in the May 11, June 16, July 18, July 21 (two letters), and July 28, 2016, letters. |
| as supplemented by letters dated October 3, October 31, November 13, November 21 and December 23, 2013 (two letters); | | |
| January 9, February 13, February 27, March 17, March 18, May 15 (two letters), | | The STPNOC staff provided draft documents for the thermal-hydraulic and debris generation and transport analysis in response to questions from the NRC staff: |
| May 22, June 25, and July 15, 2014; March 10, March 25, and August 20, 2015; and April 13, May 11, June 9, June 16, July, 18, July 21 (two letters), | | Original Response Draft Response Question Accession No. and Date Accession No. and Date Follow-up RAl-33 ML16209A226 7/18/2016 ML16258A098 9/13/2016 Follow-up RAl-34 ML16209A226 7/18/2016 ML16258A208 9/14/2016 Follow-up RAl-37 ML16196A241 6/16/2016 ML16258A207 9/14/2016 SSIB-3-4 (SSIB) ML16209A226 7/18/2016 ML16258A096 9/13/2016 SNPB-3-2 (SNPB) ML16258A100 09/12/2016 ML16154A127 5/11/2016 SNPB-3-2 Bullet 4 ML16258A367 9/06/2016 SNPB-3-13 (SNPB) ML16154A127 5/11/2016 ML16258A104 9/12/2016 All questions are from NRC RAI Round 3 dated 4/11/2016 at Accession No. ML16082A507. |
| July 28, 2016 (ADAMS Accession Nos. ML 13295A222, ML 13323A673, ML 13323A 128, ML 13338A 165, ML14015A312, ML14015A311, ML14029A533, ML14052A110, ML14072A075, ML14086A383, ML 14087A126, ML 14149A353, ML 14149A354, ML 14149A439, ML 14178A467, ML 14202A045, ML15072A092, ML15091A440, ML15246A125, ML16111B204, ML16154A117, ML16176A148, ML 16196A241, ML 16209A226, ML 16229A189, ML 16230A232, and ML 16221A393, respectively), | |
| STPNOC submitted exemption requests accompanied by a license amendment request for a risk-informed approach to resolve Generic Safety Issue (GSl)-191, "Assessment of Debris Accumulation on PWR [Pressurized-Water Reactor] | |
| Sump Performance,'' | |
| at South Texas Project, Units 1 and 2 (STP). The purpose of this public meeting was to discuss the NRC staff's remaining unresolved concerns associated with the licensee's August 20, 2015, document, which provided information on STPNOC's revised methodology to resolve GSl-191 using a risk methodology combined with a deterministic methodology | |
| -'Risk over Deterministic' or 'RoverD.' | |
| The meeting focused on the NRC staff's questions following the request for additional information (RAI) responses provided in the May 11, June 16, July 18, July 21 (two letters), | |
| and July 28, 2016, letters. The STPNOC staff provided draft documents for the thermal-hydraulic and debris generation and transport analysis in response to questions from the NRC staff: Question Original Response Draft Response Accession No. and Date Accession No. and Date Follow-up RAl-33 ML 16209A226 7/18/2016 ML 16258A098 9/13/2016 Follow-up RAl-34 ML 16209A226 7/18/2016 ML 16258A208 9/14/2016 Follow-up RAl-37 ML 16196A241 6/16/2016 ML 16258A207 9/14/2016 SSIB-3-4 (SSIB) ML 16209A226 7/18/2016 ML 16258A096 9/13/2016 SNPB-3-2 (SNPB) ML 16258A 100 09/12/2016 ML 16154A127 5/11/2016 SNPB-3-2 Bullet 4 ML 16258A367 9/06/2016 SNPB-3-13 (SNPB) ML 16154A127 5/11/2016 ML 16258A104 9/12/2016 All questions are from NRC RAI Round 3 dated 4/11/2016 at Accession No. ML 16082A507. | |
| For questions SSIB-3-4 and follow-up RAI 37, the NRC staff determined that the draft response that STPNOC sent in for the call was a good clarification, but was not required to be put on the docket since the NRC had enough information from the most recent RAI responses to consider the issues resolved. | | For questions SSIB-3-4 and follow-up RAI 37, the NRC staff determined that the draft response that STPNOC sent in for the call was a good clarification, but was not required to be put on the docket since the NRC had enough information from the most recent RAI responses to consider the issues resolved. |
| For follow-up questions RAls 33 and 34, the NRC staff discussed that it could neither determine the amount of margin between the containment pressure credited to prevent flashing and to suppress deaeration, nor the amount of containment pressure that might be available under less favorable conditions. | | For follow-up questions RAls 33 and 34, the NRC staff discussed that it could neither determine the amount of margin between the containment pressure credited to prevent flashing and to suppress deaeration, nor the amount of containment pressure that might be available under less favorable conditions. The NRC staff and licensee discussed several ways to prove that this margin exists to be able to satisfy the NRC staff's criteria. For follow-up question RAI 34, the NRC staff noted that the information provided was beneficial for the staff to understand the plant conditions that could occur. |
| The NRC staff and licensee discussed several ways to prove that this margin exists to be able to satisfy the NRC staff's criteria. | | The NRC staff and licensee discussed the answers to SNPB-3-2 and SNPB-3-13. The NRC staff stated that the answers to SNPB-3-2 concerning the 16-inch bounding break appear to address the staff's concerns. For SNPB-3-13 concerning the counter-current flow limitation, the NRC staff noted that Figure 2 and Figure 3 are the same chart. The corrected charts need to be included in the final STPNOC submittal (planned for mid-October). Also, the NRC staff discussed that the information on counter-current flow in the draft response appears complete, but that there were still aspects of the question that were not discussed fully including model validation. Finally, the NRC staff requested information on the STP core bypass flow testing previously completed that shows that debris will not significantly impact this flow. |
| For follow-up question RAI 34, the NRC staff noted that the information provided was beneficial for the staff to understand the plant conditions that could occur. The NRC staff and licensee discussed the answers to SNPB-3-2 and SNPB-3-13. | | The NRC staff reminded STPNOC that a final determination of acceptability cannot be made until a formal submittal is provided. |
| The NRC staff stated that the answers to SNPB-3-2 concerning the 16-inch bounding break appear to address the staff's concerns. | | The probabilistic risk analysis model core damage frequency and large early release frequency values were submitted formally by STPNOC staff by letter dated September 12, 2016 (ADAMS Accession No. ML16272A162). |
| For SNPB-3-13 concerning the counter-current flow limitation, the NRC staff noted that Figure 2 and Figure 3 are the same chart. The corrected charts need to be included in the final STPNOC submittal (planned for mid-October). | | |
| Also, the NRC staff discussed that the information on counter-current flow in the draft response appears complete, but that there were still aspects of the question that were not discussed fully including model validation. | | There were no public comments or questions and no meeting feedback received. |
| : Finally, the NRC staff requested information on the STP core bypass flow testing previously completed that shows that debris will not significantly impact this flow. The NRC staff reminded STPNOC that a final determination of acceptability cannot be made until a formal submittal is provided.
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| The probabilistic risk analysis model core damage frequency and large early release frequency values were submitted formally by STPNOC staff by letter dated September 12, 2016 (ADAMS Accession No. ML 16272A 162). There were no public comments or questions and no meeting feedback received. | |
| If you have any questions, please contact me at 301-47 906 or via e-mail at Lisa.Regner@nrc.gov. | | If you have any questions, please contact me at 301-47 906 or via e-mail at Lisa.Regner@nrc.gov. |
| SincerelY, Docket Nos. 50-498 and 50-499 | | SincerelY, |
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| | Lisa M. Regner, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499 |
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| ==Enclosure:== | | ==Enclosure:== |
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| List of Attendees cc w/encl: Distribution via Listserv | | List of Attendees cc w/encl: Distribution via Listserv |
| ( d / / if64/Jlti--**--
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| Lisa M. Regner, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation LIST OF ATTENDEES SEPTEMBER
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| : 14. 2016. PUBLIC MEETING WITH STP NUCLEAR OPERATING COMPANY REGARDING RISK-INFORMED APPROACH TO RESOLUTION OF GSl-191 NAME Lisa Regner Vic Cusumano Josh Kaizer Reed Anzalone CJ Fong Steven Laur Mike Murray Rob Engen Ernie Kee Wayne Harrison Steve Blossom Wes Schulz Drew Richards Rodolfo Vaghetto Dominic Munoz Craig Sellers Tim Sande Ron Holloway Eric Fulhage SOUTH TEXAS PROJECT.
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| UNITS 1 AND 2 DOCKET NOS. 50-498 AND 50-499 ORGANIZATION U.S. Nuclear Regulatory Commission (NRC) NRC NRC NRC NRC NRC STP Nuclear Operating Company (STPNOC)
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| STPNOC STPNOC STPNOC STPNOC STPNOC STPNOC Texas A&M University Alien Science and Technology Calvert Cliffs Nuclear Power Plan Enercon Wolf Creek Nuclear Generating Corp. Engineering, Planning
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| & Management, Inc. Enclosure There were no public comments or questions and no meeting feedback received.
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| If you have any questions, please contact me at 301-415-1906 or via e-mail at Lisa. Regner@nrc.gov.
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| Docket Nos. 50-498 and 50-499
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| ==Enclosure:==
| | LIST OF ATTENDEES SEPTEMBER 14. 2016. PUBLIC MEETING WITH STP NUCLEAR OPERATING COMPANY REGARDING RISK-INFORMED APPROACH TO RESOLUTION OF GSl-191 SOUTH TEXAS PROJECT. UNITS 1 AND 2 DOCKET NOS. 50-498 AND 50-499 NAME ORGANIZATION Lisa Regner U.S. Nuclear Regulatory Commission (NRC) |
| | Vic Cusumano NRC Josh Kaizer NRC Reed Anzalone NRC CJ Fong NRC Steven Laur NRC Mike Murray STP Nuclear Operating Company (STPNOC) |
| | Rob Engen STPNOC Ernie Kee STPNOC Wayne Harrison STPNOC Steve Blossom STPNOC Wes Schulz STPNOC Drew Richards STPNOC Rodolfo Vaghetto Texas A&M University Dominic Munoz Alien Science and Technology Craig Sellers Calvert Cliffs Nuclear Power Plan Tim Sande Enercon Ron Holloway Wolf Creek Nuclear Generating Corp. |
| | Eric Fulhage Engineering, Planning & Management, Inc. |
| | Enclosure |
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| List of Attendees cc w/encl: Distribution via Lists DISTRIBUTION; PUBLIC LPL4-1 r/f RidsACRS_MailCTR Resource RidsNrrDeEpnb Resource RidsNrrDeEsgb Resource RidsNrrDorllpl4-1 Resource RidsNrrDraApla Resource RidsNrrDssSnpb Resource RidsNrrDssSrxb Resource RidsNrrDssSsib Resource Sincerely,
| | ML16279A331 *per email OFFICE NRR/DORL/LPL4-1 /PM NRR/DORL/LPL4-1 /LA NRR/DSS/SSIB/BC* NRR/DSS/SNPB/BC* |
| /RAJ Lisa M. Regner, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation RidsNrrDssStsb Resource RidsNrrLAJBurkhardt Resource RidsNrrPMSouthTexas Resource RidsRgn4MailCenter Resource JBowen, EDO RIV TWertz, NRR ARussell, NRR/DSS/SSIB RAnzalone, NRR/DSS/SNPB
| | NAME LRegner JBurkhardt VCusumano Rlukes DATE 10/04/16 10/18/16 10/26/16 10/05/16 OFFICE NRR/DRA/APLAITL* NRR/DORL/LPL4-1 /BC NRR/DORL/LPL4-1 /PM NAME CJ Fong RPascarelli LRegner DATE 10/20/16 10/27/16 10/27/16}} |
| : JKaizer, NRR/DSS/SNPB Slaur, NRR/DRA/APLA ADAMS Accession No. ML 16279A331
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| *per email OFFICE NRR/DORL/LPL4-1 | |
| /PM NRR/DORL/LPL4-1 | |
| /LA NRR/DSS/SSIB/BC* | |
| NRR/DSS/SNPB/BC* | |
| NAME LRegner JBurkhardt VCusumano Rlukes DATE 10/04/16 10/18/16 10/26/16 10/05/16 OFFICE NRR/DRA/APLAITL | |
| * NRR/DORL/LPL4-1 | |
| /BC NRR/DORL/LPL4-1 | |
| /PM NAME CJ Fong RPascarelli LRegner DATE 10/20/16 10/27/16 10/27/16 OFFICIAL RECORD COPY}} | |
Letter Sequence Meeting |
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CAC:MF2400, Control Room Habitability (Approved, Closed) CAC:MF2401, Control Room Habitability (Approved, Closed) CAC:MF2402, Control Room Habitability (Approved, Closed) CAC:MF2403, Control Room Habitability (Approved, Closed) CAC:MF2404, Control Room Habitability (Approved, Closed) CAC:MF2405, Control Room Habitability (Approved, Closed) CAC:MF2406, Control Room Habitability (Approved, Closed) CAC:MF2407, Control Room Habitability (Approved, Closed) CAC:MF2408, Control Room Habitability (Approved, Closed) CAC:MF2409, Control Room Habitability (Approved, Closed) |
Administration
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
|
MONTHYEARML15274A5992015-10-0101 October 2015
10-01-15 Public Phone Call
Project stage: Request
ML16011A0612016-02-0202 February 2016
Summary of 10/1/15 Meeting with STP Nuclear Operating Company to Discuss Revised Pilot Submittal and Request for Exemptions for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 at South Texas Project, Units 1 and 2 (CAC MF
Project stage: Meeting
ML16028A1522016-02-18018 February 2016
1/14/2016 Summary of Public Meeting with STP Nuclear Operating Company Regarding Modifications to the Licensee'S Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2
Project stage: Meeting
ML16088A2432016-04-0101 April 2016
2/18/2016, Summary of Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2400-MF2409)
Project stage: Meeting
ML16092A0442016-04-11011 April 2016
Summary of 3/3/2016 Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2400-MF2409)
Project stage: Meeting
ML16082A5072016-04-11011 April 2016
Request for Additional Information, Phased Response Requested, Exemption and License Amendment Request for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 (CAC Nos. MF2400-MF2409)
Project stage: RAI
ML16095A0102016-04-13013 April 2016
Summary of November 17-19, 2015 Thermal-Hydraulic Review at Texas A&M University; Pilot Submittal and Request for Exemptions for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 (CAC MF2400-MF2409)
Project stage: Other
ML16092A0852016-04-13013 April 2016
3/17/2016 Summary of Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2401-MF2409)
Project stage: Meeting
ML16096A0652016-04-13013 April 2016
Summary of February 4 and 16, 2016, Regulatory Audit at Westinghouse in Rockville, MD, Boric Acid Precipitation, Exemption and License Amendment Request, Risk-Informed Approach to Resolve Generic Safety Issue 191
Project stage: Other
ML16111A0272016-04-18018 April 2016
STP Nuclear Operating Company Slideshow for Public Meeting on April 21, 2016 for GSI-191 Resolution (CAC No. MF2400-01)
Project stage: Meeting
ML16103A3442016-04-26026 April 2016
Summary of February 24-26, 2016 Audit, Debris Transport Review at Alion Science and Technology Corporation, Albuquerque, Nm; Pilot Submittal and Exemption Request, Risk-Informed Approach to Resolve GSI 191
Project stage: Other
ML16032A4032016-04-26026 April 2016
FRN, Draft Environmental Assessment and Finding of No Significant Impact, Revise Licensing Basis as Documented in the UFSAR and Request for Exemptions, Risk-Informed Approach to Address GSI-191 (CAC MF2400-MF2409)
Project stage: Draft Other
ML16032A3872016-04-26026 April 2016
Draft Environmental Assessment and Finding of No Significant Impact, Revise Licensing Basis as Documented in the UFSAR and Request for Exemptions, Risk-Informed Approach to Address GSI-191 (CAC MF2400-MF2409)
Project stage: Draft Other
ML16127A4002016-05-11011 May 2016
Audit Summary, Thermal-Hydraulic Review on February 23-25, 2016 at Texas A&M University; Pilot Submittal and Request for Exemptions for a Risk-Informed Approach to Resolve Generic Safety Issue 191 (CAC MF2400-MF2409)
Project stage: Other
ML16125A2902016-05-26026 May 2016
Request for Additional Information, Risk Review, Exemption and License Amendment Request for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 (CAC Nos. MF2400-MF2409)
Project stage: RAI
ML16141B0812016-05-31031 May 2016
Audit Summary, Risk Audit on April 12-13, 2016, at Alumni Center at the University of Texas, Austin, Tx; Pilot Generic Safety Issue 191 Submittal and Exemption Request, and Draft Request for Additional Information
Project stage: Draft RAI
ML16175A1082016-06-24024 June 2016
Summary of 4/21/2016 Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2
Project stage: Meeting
ML16190A0082016-07-13013 July 2016
Summary of 6/22/2016 Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2400-MF2409)
Project stage: Meeting
ML16194A2342016-07-21021 July 2016
Request for Withholding Information from Public Disclosure - 5/6/16 Affidavit Executed by D. Munoz and M. Rozboril, Alion Science and Technology, Response to Follow-up RAIs 18, 38, and 44
Project stage: RAI
ML16242A0102016-08-23023 August 2016
NRR E-mail Capture - (External_Sender) FW: South Texas Project GSI-191 Draft Risk Responses to Questions for Public Meeting on August 29, 2016
Project stage: Request
ML16242A0092016-08-25025 August 2016
NRR E-mail Capture - (External_Sender) South Texas Project GSI-191 Draft thermal-hydraulic Responses to Questions for Public Meeting on August 29, 2016
Project stage: Request
ML16238A5272016-09-0101 September 2016
Summary of 7/28/16, Public Meeting with STP Nuclear Operating Company to Discuss the License Amendment and Exemption Requests to Use a Risk-Informed Approach to the Resolution of GSI-191 (CAC Nos. MF2400 - MF2409)
Project stage: Meeting
ML16258A3672016-09-0606 September 2016
NRR E-mail Capture - (External_Sender) South Texas Project Generic Safety Issue 191 Resolution SNPB-3-2, Bullet 4 16 -inch Bounding Break Clarification for September 14, 2016 Public Meeting
Project stage: Request
ML16258A1002016-09-12012 September 2016
NRR E-mail Capture - (External_Sender) South Texas Project Generic Safety Issue 191 Resolution RAI APLA-3-2 Clarification for September 14, 2016 Public Meeting
Project stage: Request
ML16258A1042016-09-12012 September 2016
NRR E-mail Capture - (External_Sender) South Texas Project Generic Safety Issue 191 Resolution RAI SNPB-3-13 Clarification for September 14, 2016 Public Meeting
Project stage: Request
ML16258A0962016-09-13013 September 2016
NRR E-mail Capture - (External_Sender) South Texas Project Generic Safety Issue 191 Resolution RAI SSIB-3-4 Clarification for September 14, 2016 Public Meeting
Project stage: Request
ML16258A0982016-09-13013 September 2016
NRR E-mail Capture - (External_Sender) South Texas Project Generic Safety Issue 191 Resolution RAI 33 Clarification for September 14, 2016 Public Meeting
Project stage: Request
ML16258A2072016-09-14014 September 2016
NRR E-mail Capture - (External_Sender) South Texas Project Generic Safety Issue 191 Resolution RAI 37 Clarification for September 14, 2016 Public Meeting
Project stage: Request
ML16258A2082016-09-14014 September 2016
NRR E-mail Capture - (External_Sender) South Texas Project Generic Safety Issue 191 Resolution RAI 34 Clarification for September 14, 2016 Public Meeting
Project stage: Request
ML16246A0222016-10-0505 October 2016
Summary of Public Meeting with STP Nuclear Operating Company Regarding Open Items Related to Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2400 - MF2409)
Project stage: Meeting
ML16279A3312016-10-27027 October 2016
Summary of Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2400-MF2409)
Project stage: Meeting
ML16302A4532016-12-12012 December 2016
Closeout of Request for Additional Information Questions That Are No Longer Applicable, Resolution of Generic Safety Issue (GSI) 191 (CAC Nos. MF2400-MF2409)
Project stage: RAI
ML16351A1502016-12-16016 December 2016
Correction Letter Closeout of Request for Information Questions That Are No Longer Applicable Associated with the Resolution of Generic Safety Issue 191 (CAC Nos. MF2400 - MF2409)
Project stage: RAI
ML16278A5982017-05-0202 May 2017
Letter, Environmental Assessment and Finding of No Significant Impact, Revise Licensing Basis as Documented in the UFSAR and Request for Exemptions, Risk-Informed Approach to Address GSI-191 (CAC MF2400 to MF2409)
Project stage: Other
ML16278A5992017-05-0202 May 2017
Environmental Assessment and Finding of No Significant Impact, Revise Licensing Basis as Documented in the UFSAR and Request for Exemptions, Risk-Informed Approach to Address GSI-191 (CAC MF2400 to MF2409)
Project stage: Other
ML17137A3252017-05-17017 May 2017
Safety Evaluation of LAR by South Texas Project Nuclear Operating Company to Adopt a Risk-Informed Resolution of Generic Safety Issue-191
Project stage: Approval
ML17151A8432017-06-16016 June 2017
OEDO-17-00326 - EDO Response to ACRS Chairman, Safety Evaluation of License Amendment Request by STP Nuclear Operating Company to Adopt a Risk-Informed Resolution of Generic Safety Issue-191
Project stage: Approval
NRC-2016-0092, South Texas Project, Units 1 and 2 - FRN: Exemption from the Requirements of 10 CFR 50.46 and 10 CFR Part 50, Appendix a, General Design Criteria 35, 38, 41 (CAC Nos. MF2402-MF2409)2017-07-11011 July 2017
South Texas Project, Units 1 and 2 - FRN: Exemption from the Requirements of 10 CFR 50.46 and 10 CFR Part 50, Appendix a, General Design Criteria 35, 38, 41 (CAC Nos. MF2402-MF2409)
Project stage: Approval
ML17037C8712017-07-11011 July 2017
Letter, Exemption from the Requirements of 10 CFR Part 50, Section 50.46 (CAC Nos. MF2402-MF2409)
Project stage: Approval
ML17037C8762017-07-11011 July 2017
FRN: Exemption from the Requirements of 10 CFR 50.46 and 10 CFR Part 50, Appendix a, General Design Criteria 35, 38, 41 (CAC Nos. MF2402-MF2409)
Project stage: Approval
ML17055A5002017-07-11011 July 2017
Enclosure 4 to Amendment Nos. 212 and 198, Resolution of Licensee Comments on Safety Evaluation - Risk-Informed Approach to Resolve Generic Safety Issue 191
Project stage: Approval
ML17019A0032017-07-11011 July 2017
Attachment 2 to Safety Evaluation - In-Vessel Thermal-Hydraulic Analysis, Issuance of Amendment Nos. 212 and 198 - Risk-Informed Approach to Resolve Generic Safety Issue 191
Project stage: Approval
ML17038A2232017-07-11011 July 2017
Issuance of Amendment Nos. 212 and 198 - Risk-Informed Approach to Resolve Generic Safety Issue 191
Project stage: Approval
ML17019A0022017-07-11011 July 2017
Safety Evaluation, Enclosure 3 to Amendment Nos. 212 and 198 - Risk-Informed Approach to Resolve Generic Safety Issue 191
Project stage: Approval
2016-05-31
[Table View] |
Summary of Public Meeting with STP Nuclear Operating Company Regarding Open Items, Risk-Informed Generic Safety Issue (GSI) 191 Application and Supplements for South Texas Project, Units 1 and 2 (CAC Nos. MF2400-MF2409)| ML16279A331 |
| Person / Time |
|---|
| Site: |
South Texas  |
|---|
| Issue date: |
10/27/2016 |
|---|
| From: |
Lisa Regner
Plant Licensing Branch IV |
|---|
| To: |
Gerry Powell
South Texas |
|---|
| Regner L |
| References |
|---|
| CAC MF2400, CAC MF2401, CAC MF2402, CAC MF2403, CAC MF2404, CAC MF2405, CAC MF2406, CAC MF2407, CAC MF2408, CAC MF2409 |
| Download: ML16279A331 (5) |
|
|
|---|
Category:Meeting Summary
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2024-05-06
[Table view] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 27, 2016 LICENSEE: STP Nuclear Operating Company FACILITY: South Texas Project, Units 1 and 2
SUBJECT:
SUMMARY
OF SEPTEMBER 14, 2016, PUBLIC CONFERENCE CALL WITH STP NUCLEAR OPERATING COMPANY TO DISCUSS THE LICENSE AMENDMENT AND EXEMPTION REQUESTS TO USE A RISK-INFORMED APPROACH TO THE RESOLUTION OF GENERIC SAFETY ISSUE 191, "ASSESSMENT OF DEBRIS ACCUMULATION ON PWR SUMP PERFORMANCE" (CAC NOS. MF2400, MF2401, MF2402, MF2403, MF2404, MF2405, MF2406, MF2407, MF2408, AND MF2409)
On September 14, 2016, a Category 1 public conference call was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of STP Nuclear Operating Company (STPNOC, the licensee), at NRC Headquarters, Rockville, Maryland. The meeting notice and agenda, dated September 1, 2016, are located in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML16258A451. A list of meeting attendees is provided in the Enclosure to this meeting summary.
By letter dated June 19, 2013 (ADAMS Package Accession No. ML131750250), as supplemented by letters dated October 3, October 31, November 13, November 21 and December 23, 2013 (two letters); January 9, February 13, February 27, March 17, March 18, May 15 (two letters), May 22, June 25, and July 15, 2014; March 10, March 25, and August 20, 2015; and April 13, May 11, June 9, June 16, July, 18, July 21 (two letters), July 28, 2016 (ADAMS Accession Nos. ML13295A222, ML13323A673, ML13323A128, ML13338A165, ML14015A312, ML14015A311, ML14029A533, ML14052A110, ML14072A075, ML14086A383, ML14087A126, ML14149A353, ML14149A354, ML14149A439, ML14178A467, ML14202A045, ML15072A092, ML15091A440, ML15246A125, ML16111B204, ML16154A117, ML16176A148, ML16196A241, ML16209A226, ML16229A189, ML16230A232, and ML16221A393, respectively), STPNOC submitted exemption requests accompanied by a license amendment request for a risk-informed approach to resolve Generic Safety Issue (GSl)-191, "Assessment of Debris Accumulation on PWR [Pressurized-Water Reactor] Sump Performance, at South Texas Project, Units 1 and 2 (STP).
The purpose of this public meeting was to discuss the NRC staff's remaining unresolved concerns associated with the licensee's August 20, 2015, document, which provided information on STPNOC's revised methodology to resolve GSl-191 using a risk methodology combined with a deterministic methodology - 'Risk over Deterministic' or 'RoverD.' The meeting focused on the NRC staff's questions following the request for additional information (RAI) responses provided in the May 11, June 16, July 18, July 21 (two letters), and July 28, 2016, letters.
The STPNOC staff provided draft documents for the thermal-hydraulic and debris generation and transport analysis in response to questions from the NRC staff:
Original Response Draft Response Question Accession No. and Date Accession No. and Date Follow-up RAl-33 ML16209A226 7/18/2016 ML16258A098 9/13/2016 Follow-up RAl-34 ML16209A226 7/18/2016 ML16258A208 9/14/2016 Follow-up RAl-37 ML16196A241 6/16/2016 ML16258A207 9/14/2016 SSIB-3-4 (SSIB) ML16209A226 7/18/2016 ML16258A096 9/13/2016 SNPB-3-2 (SNPB) ML16258A100 09/12/2016 ML16154A127 5/11/2016 SNPB-3-2 Bullet 4 ML16258A367 9/06/2016 SNPB-3-13 (SNPB) ML16154A127 5/11/2016 ML16258A104 9/12/2016 All questions are from NRC RAI Round 3 dated 4/11/2016 at Accession No. ML16082A507.
For questions SSIB-3-4 and follow-up RAI 37, the NRC staff determined that the draft response that STPNOC sent in for the call was a good clarification, but was not required to be put on the docket since the NRC had enough information from the most recent RAI responses to consider the issues resolved.
For follow-up questions RAls 33 and 34, the NRC staff discussed that it could neither determine the amount of margin between the containment pressure credited to prevent flashing and to suppress deaeration, nor the amount of containment pressure that might be available under less favorable conditions. The NRC staff and licensee discussed several ways to prove that this margin exists to be able to satisfy the NRC staff's criteria. For follow-up question RAI 34, the NRC staff noted that the information provided was beneficial for the staff to understand the plant conditions that could occur.
The NRC staff and licensee discussed the answers to SNPB-3-2 and SNPB-3-13. The NRC staff stated that the answers to SNPB-3-2 concerning the 16-inch bounding break appear to address the staff's concerns. For SNPB-3-13 concerning the counter-current flow limitation, the NRC staff noted that Figure 2 and Figure 3 are the same chart. The corrected charts need to be included in the final STPNOC submittal (planned for mid-October). Also, the NRC staff discussed that the information on counter-current flow in the draft response appears complete, but that there were still aspects of the question that were not discussed fully including model validation. Finally, the NRC staff requested information on the STP core bypass flow testing previously completed that shows that debris will not significantly impact this flow.
The NRC staff reminded STPNOC that a final determination of acceptability cannot be made until a formal submittal is provided.
The probabilistic risk analysis model core damage frequency and large early release frequency values were submitted formally by STPNOC staff by letter dated September 12, 2016 (ADAMS Accession No. ML16272A162).
There were no public comments or questions and no meeting feedback received.
If you have any questions, please contact me at 301-47 906 or via e-mail at Lisa.Regner@nrc.gov.
SincerelY,
( d /
if64/Jlti--**--
/
Lisa M. Regner, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499
Enclosure:
List of Attendees cc w/encl: Distribution via Listserv
LIST OF ATTENDEES SEPTEMBER 14. 2016. PUBLIC MEETING WITH STP NUCLEAR OPERATING COMPANY REGARDING RISK-INFORMED APPROACH TO RESOLUTION OF GSl-191 SOUTH TEXAS PROJECT. UNITS 1 AND 2 DOCKET NOS. 50-498 AND 50-499 NAME ORGANIZATION Lisa Regner U.S. Nuclear Regulatory Commission (NRC)
Vic Cusumano NRC Josh Kaizer NRC Reed Anzalone NRC CJ Fong NRC Steven Laur NRC Mike Murray STP Nuclear Operating Company (STPNOC)
Rob Engen STPNOC Ernie Kee STPNOC Wayne Harrison STPNOC Steve Blossom STPNOC Wes Schulz STPNOC Drew Richards STPNOC Rodolfo Vaghetto Texas A&M University Dominic Munoz Alien Science and Technology Craig Sellers Calvert Cliffs Nuclear Power Plan Tim Sande Enercon Ron Holloway Wolf Creek Nuclear Generating Corp.
Eric Fulhage Engineering, Planning & Management, Inc.
Enclosure
ML16279A331 *per email OFFICE NRR/DORL/LPL4-1 /PM NRR/DORL/LPL4-1 /LA NRR/DSS/SSIB/BC* NRR/DSS/SNPB/BC*
NAME LRegner JBurkhardt VCusumano Rlukes DATE 10/04/16 10/18/16 10/26/16 10/05/16 OFFICE NRR/DRA/APLAITL* NRR/DORL/LPL4-1 /BC NRR/DORL/LPL4-1 /PM NAME CJ Fong RPascarelli LRegner DATE 10/20/16 10/27/16 10/27/16