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| | issue date = 07/21/2015 | | | issue date = 07/21/2015 |
| | title = 4/22/2015 Summary of 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, Units 1 and 2 (TAC MF2400 t | | | title = 4/22/2015 Summary of 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, Units 1 and 2 (TAC MF2400 t |
| | 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 = | | | addressee name = |
| Line 9: |
Line 9: |
| | 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 = TAC MF2400, TAC MF2401, TAC MF2402, TAC MF2403, TAC MF2404, TAC MF2405, TAC MF2406, TAC MF2407, TAC MF2408, TAC MF2409 | | | case reference number = TAC MF2400, TAC MF2401, TAC MF2402, TAC MF2403, TAC MF2404, TAC MF2405, TAC MF2406, TAC MF2407, TAC MF2408, TAC MF2409 |
| | document type = Meeting Summary | | | document type = Meeting Summary |
| | page count = 5 | | | page count = 5 |
| | project = TAC:MF2400, TAC:MF2401, TAC:MF2402, TAC:MF2403, TAC:MF2404, TAC:MF2405, TAC:MF2406, TAC:MF2407, TAC:MF2408, TAC:MF2409 | | | project = TAC:MF2400, TAC:MF2401, TAC:MF2402, TAC:MF2403, TAC:MF2404, TAC:MF2405, TAC:MF2406, TAC:MF2407, TAC:MF2408, TAC:MF2409 |
| | | stage = Meeting |
| }} | | }} |
|
| |
|
| =Text= | | =Text= |
| {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 21, 2015 LICENSEE: STP Nuclear Operating Company FACILITY: South Texas Project, Units 1 and 2 SUBJECT: SUMMARY OF APRIL 22, 2015, 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 GENERIC SAFETY ISSUE 191, "ASSESSMENT OF DEBRIS ACCUMULATION ON PWR SUMP PERFORMANCE" (TAC NOS. MF2400, MF2401, MF2402, MF2403, MF2404, MF2405, MF2406, MF2407, MF2408, AND MF2409) On April 22, 2015, a public meeting 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 February 13, 2015, are located in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML 15091A578. The licensee's handouts from the meeting are available in ADAMS at Accession Nos. ML 15111A056 and ML 15111A058. An NRC staff handout is available at ADAMS Accession No. ML 15112A256. A list of meeting attendees is provided in the Enclosure to this meeting summary. By letter dated June 19, 2013 (ADAMS Accession No. ML 131750250), as supplemented by letters dated October 3, October 31, November 13, November 21, and December 23, 2013 (two letters); and January 9, February 13, February 27, March 17, March 18, May 15 (two letters), May 22, June 25, and July 15, 2014, March 10, and March 25, 2015 (ADAMS Accession Nos. ML13295A222, ML13323A673, ML13323A128, ML13338A165, ML14015A312, ML14015A311, ML 14029A533, ML 14052A053, ML 14072A076, ML 14086A383, ML 14087A126, ML 14149A353, ML14149A354, ML14149A434, ML14178A481, ML14202A045, ML15072A092, and ML 15091A440, respectively), STPNOC submitted exemption requests accompanied by a license amendment request (LAR) 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 teleconference call was to discuss the licensee's proposed structure of the methodology change submittal which the licensee plans to provide to the staff in June 2015. The June 2015 supplement will provide information on the new Risk over Deterministic methodology, and modify the license amendment requests and exemptions. Another purpose was to provide NRC staff feedback on the request for additional information (RAI) response received from STPNOC by letter dated March 25, 2015. | | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 21, 2015 LICENSEE: STP Nuclear Operating Company FACILITY: South Texas Project, Units 1 and 2 |
| -2 -Meeting Summary The NRC staff noted that an on-site regulatory audit is planned for May 12-14, 2015, so the staff can perform an in-depth review of the analyses performed by the licensee as a resolution to specific portions of GSl-191 employing a risk-informed approach. The risk-informed approach, referred by the licensee as 'RoverD,' and related computations are documented in Attachment 7 in the licensee's letter dated March 25, 2015. The objective of the audit is to evaluate technical approaches implemented in support of the Rovero methodology and to identify related verification and validation activities. The licensee and NRC staff discussed the licensee's response to question AADB 3 (ADAMS package Accession No. ML 14086A383). The staff provided a new question requesting confirmation of the reliability and sufficiency of the containment spray pumps to meet the requirements of Title 10 of the Code of Federal Regulations (10 CFR), Section 50.67, "Accident source term," 10 CFR Part 50, Appendix A General Design Criteria (GDC) 19 "Control room," 10 CFR 20.1201 "Occupational Dose Limits for Adults," and that they will continue to meet the alternate source term criteria in Regulatory Guidance 1.183 (ADAMS Accession No. ML 15112A256). The NRC staff questioned an assumption in the licensee's large early release frequency (LERF) calculation (i.e., a ratio approach to estimate the LERF attributable to any increase in core damage frequency (CDF) from debris). The NRC staff informed the licensee that it plans to review the LERF calculation during the May audit. The NRC staff noted reactor compartment coatings concerns regarding the licensee's crud estimates and the use of 5 diameters for unqualified coatings debris size versus the 10 diameters estimates specified in a revision to the NRG-staff approved guidance by letter dated April 6, 201 O (ADAMS Accession No. ML 100960495). These will be topics for the next weekly public conference call scheduled for May 6, 2015, at 3:00 p.m. eastern time. Other topics for discussion at the May 5th meeting include the exemption requests, defense-in-depth and safety margin discussion, and debris transport and generation.
| | |
| -3 -No public comments were received and no Public Meeting Feedback Forms were received for this meeting. Please direct any inquiries to me at 301-415-1906, or lisa.regner@nrc.gov. Docket Nos. 50-498 and 50-499 Enclosure: List of Attendees cc w/encl: Distribution via Listserv isa M. Regner, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation LIST OF ATTENDEES APRIL 22. 2015. CONFERENCE CALL WITH STP NUCLEAR OPERATING COMPANY REGARDING RISK-INFORMED APPROACH TO RESOLUTION OF GSl-191 NAME Lisa Regner John Stang Victor Cusumano Caroline Tilton Ashley Guzzetta Steve Smith CJ Fong Jerry Dozier Matt Yoder Paul Klein Osvaldo Pensado Steve Blossom Drew Richards Ernie Kee Wayne Harrison Linda Dyer Bruce Letellier Ron Holloway Jeremy Tejada Tim Sande SOUTH TEXAS PROJECT. UNITS 1 AND 2 DOCKET NOS. 50-498 AND 50-499 ORGANIZATION U.S. Nuclear Regulatory Commission (NRC) NRC NRC NRC NRC NRC NRC NRC NRC NRC Southwest Research Institute (contractor for NRC) STP Nuclear Operating Company (STPNOC) STPNOC STPNOC STPNOC STPNOC Ali on Wolf Creek Nuclear Generating Corporation University of Texas at Austin Enercon Enclosure
| | ==SUBJECT:== |
| -3 -No public comments were received and no Public Meeting Feedback Forms were received for this meeting. Please direct any inquiries to me at 301-415-1906, or lisa.regner@nrc.gov. Sincerely, IRA/ 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 DISTRIBUTION: PUBLIC LPL4-1 r/f RidsAcrsAcnw_MailCTR Resource RidsNrrDeEsgb Resource RidsNrrDorllpl4-1 Resource RidsNrrDraApla Resource RidsNrrDssSrxb Resource RidsNrrDssSsib Resource RidsNrrDssStsb Resource RidsNrrLAJBurkhardt Resource RidsNrrPMSouthTexas Resource RidsNrrDssScvb Resource RidsNrrDeEpnb Resource RidsNrrDssSnpb Resource RidsRgn4MailCenter Resource MWaters, EDO RIV TWertz, NRR SSmith, NRR/DSS/SSIB PKlein, NRR/DE/ESGB MYoder, NRR/DE/ESGB VCusumano, NRR/DSS/SSIB AGuzzetta, NRR/DSS/SRXB ADAMS Accession No.: ML 15177A104 OFFICE NRR/DORL/LPL4-1 /PM NRR/DORL/LPL4-1 /LA NRR/DSS/STSB/BC* NAME LRegner JBurkhardt RElliott DATE 6/25/15 6/26/15 7/8/15 OFFICE NRR/DRA/APLA/BC* NRR/DE/ESGB/BC* NRR/DRA/ARCB/BC* NAME SRosenberg GKulesa US hoop DATE 7/8/15 7/10/15 7/15/15 OFFICIAL RECORD COPY CFong, NRR/DRA/APLA JStang, NRR/DSS/SSIB DBoirel, NRR/DSS/SSIB Slaur, NRR/DRA/APLA MBanks, ACRS RElliott, NRR/DSS/STSB KWest, NRR/DSS/STSB ASallman, NRR/DSS/SCVB Tsao, NRR/DE/EPNB LWard, NRR/DSS/SNPB *by email NRR/DSS/SSIB/BC* VCusumano 7/8/15 NRR/DORL/LPL4-1 /BC NRR/DORL/LPL4-1 /PM MMarkley LRegner 7/21/15 7/21/15
| | |
| }} | | ==SUMMARY== |
| | OF APRIL 22, 2015, 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 GENERIC SAFETY ISSUE 191, "ASSESSMENT OF DEBRIS ACCUMULATION ON PWR SUMP PERFORMANCE" (TAC NOS. MF2400, MF2401, MF2402, MF2403, MF2404, MF2405, MF2406, MF2407, MF2408, AND MF2409) |
| | On April 22, 2015, a public meeting 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 February 13, 2015, are located in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML15091A578. The licensee's handouts from the meeting are available in ADAMS at Accession Nos. ML15111A056 and ML15111A058. An NRC staff handout is available at ADAMS Accession No. ML15112A256. A list of meeting attendees is provided in the Enclosure to this meeting summary. |
| | By letter dated June 19, 2013 (ADAMS Accession No. ML131750250), as supplemented by letters dated October 3, October 31, November 13, November 21, and December 23, 2013 (two letters); and January 9, February 13, February 27, March 17, March 18, May 15 (two letters), |
| | May 22, June 25, and July 15, 2014, March 10, and March 25, 2015 (ADAMS Accession Nos. |
| | ML13295A222, ML13323A673, ML13323A128, ML13338A165, ML14015A312, ML14015A311, ML14029A533, ML14052A053, ML14072A076, ML14086A383, ML14087A126, ML14149A353, ML14149A354, ML14149A434, ML14178A481, ML14202A045, ML15072A092, and ML15091A440, respectively), STPNOC submitted exemption requests accompanied by a license amendment request (LAR) 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 teleconference call was to discuss the licensee's proposed structure of the methodology change submittal which the licensee plans to provide to the staff in June 2015. The June 2015 supplement will provide information on the new Risk over Deterministic methodology, and modify the license amendment requests and exemptions. Another purpose was to provide NRC staff feedback on the request for additional information (RAI) response received from STPNOC by letter dated March 25, 2015. |
| | |
| | Meeting Summary The NRC staff noted that an on-site regulatory audit is planned for May 12-14, 2015, so the staff can perform an in-depth review of the analyses performed by the licensee as a resolution to specific portions of GSl-191 employing a risk-informed approach. The risk-informed approach, referred by the licensee as 'RoverD,' and related computations are documented in Attachment 7 in the licensee's letter dated March 25, 2015. The objective of the audit is to evaluate technical approaches implemented in support of the Rovero methodology and to identify related verification and validation activities. |
| | The licensee and NRC staff discussed the licensee's response to question AADB 3 (ADAMS package Accession No. ML14086A383). The staff provided a new question requesting confirmation of the reliability and sufficiency of the containment spray pumps to meet the requirements of Title 10 of the Code of Federal Regulations (10 CFR), Section 50.67, "Accident source term," 10 CFR Part 50, Appendix A General Design Criteria (GDC) 19 "Control room," 10 CFR 20.1201 "Occupational Dose Limits for Adults," and that they will continue to meet the alternate source term criteria in Regulatory Guidance 1.183 (ADAMS Accession No. ML15112A256). |
| | The NRC staff questioned an assumption in the licensee's large early release frequency (LERF) calculation (i.e., a ratio approach to estimate the LERF attributable to any increase in core damage frequency (CDF) from debris). The NRC staff informed the licensee that it plans to review the LERF calculation during the May audit. |
| | The NRC staff noted reactor compartment coatings concerns regarding the licensee's crud estimates and the use of 5 diameters for unqualified coatings debris size versus the 10 diameters estimates specified in a revision to the NRG-staff approved guidance by letter dated April 6, 201 O (ADAMS Accession No. ML100960495). These will be topics for the next bi-weekly public conference call scheduled for May 6, 2015, at 3:00 p.m. eastern time. Other topics for discussion at the May 5th meeting include the exemption requests, defense-in-depth and safety margin discussion, and debris transport and generation. |
| | |
| | No public comments were received and no Public Meeting Feedback Forms were received for this meeting. Please direct any inquiries to me at 301-415-1906, or lisa.regner@nrc.gov. |
| | isa 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 APRIL 22. 2015. CONFERENCE CALL 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) |
| | John Stang NRC Victor Cusumano NRC Caroline Tilton NRC Ashley Guzzetta NRC Steve Smith NRC CJ Fong NRC Jerry Dozier NRC Matt Yoder NRC Paul Klein NRC Osvaldo Pensado Southwest Research Institute (contractor for NRC) |
| | Steve Blossom STP Nuclear Operating Company (STPNOC) |
| | Drew Richards STPNOC Ernie Kee STPNOC Wayne Harrison STPNOC Linda Dyer STPNOC Bruce Letellier Ali on Ron Holloway Wolf Creek Nuclear Generating Corporation Jeremy Tejada University of Texas at Austin Tim Sande Enercon Enclosure |
| | |
| | ML15177A104 *by email OFFICE NRR/DORL/LPL4-1 /PM NRR/DORL/LPL4-1 /LA NRR/DSS/STSB/BC* NRR/DSS/SSIB/BC* |
| | NAME LRegner JBurkhardt RElliott VCusumano DATE 6/25/15 6/26/15 7/8/15 7/8/15 OFFICE NRR/DRA/APLA/BC* NRR/DE/ESGB/BC* NRR/DRA/ARCB/BC* NRR/DORL/LPL4-1 /BC NRR/DORL/LPL4-1 /PM NAME SRosenberg GKulesa US hoop MMarkley LRegner DATE 7/8/15 7/10/15 7/15/15 7/21/15 7/21/15}} |
Letter Sequence Meeting |
|---|
TAC:MF2400, Control Room Habitability (Open) TAC:MF2401, Control Room Habitability (Open) TAC:MF2402, Control Room Habitability (Open) TAC:MF2403, Control Room Habitability (Open) TAC:MF2404, Control Room Habitability (Open) TAC:MF2405, Control Room Habitability (Open) TAC:MF2406, Control Room Habitability (Open) TAC:MF2407, Control Room Habitability (Open) TAC:MF2408, Control Room Habitability (Open) TAC:MF2409, Control Room Habitability (Open) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance
- Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement
Administration
- Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
Results
Other: ML13323A186, ML13323A189, ML13323A190, ML13323A191, ML13323B187, ML13323B191, ML13323B194, ML13323B196, ML13323B198, ML13323B199, ML13323B200, ML13323B201, ML13323B202, ML13323B204, ML13323B207, ML13323B208, ML13323B209, ML14015A045, ML14052A053, ML14072A076, ML14086A386, ML14149A089, ML14149A434, ML14149A435, ML14178A481, ML14321A438, ML14321A677, ML14344A545, ML14344A546, ML14349A790, ML15119A326, ML15175A024, ML15183A007, ML15183A009, ML15246A128, ML15246A129, ML15265A601, ML16230A232, NOC-AE-13003039, Corrections to Information Provided in Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI), NOC-AE-13003040, Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test., NOC-AE-13003065, Response to STP-GSI-191-EMCB-RAI-1, NOC-AE-14003082, Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 3, NOC-AE-14003101, Enclosure 1 to Enclosure 6 Concerning Second Set of Responses to April 2014, Requests for Additional Information Regarding STP Risk-Informed GSI-191 Application, NOC-AE-14003103, University of Texas White Paper, Means of Aggregation and NUREG-1829: Geometric and Arithmetic Means, Rev. 3, Enclosure 2 to Attachment 1, NOC-AE-14003104, Revised Affidavit for Withholding for Casa Grande Analyses for Risk-Informed GSI-191 Licensing Application, NOC-AE-14003105, Third Set of Responses to April, 2014, Requests for Additional Information Regarding STP Risk-Informed GSI-191 Licensing Application, NOC-AE-14003106, Second Submittal of Casa Grande Source Code for Stp'S Risk-Informed GSI- 191 Licensing Application, NOC-AE-14003111, Submittal of Casa Grande Source Code for Stp'S Risk-Informed GSI-191 Licensing Application, NOC-AE-14003190, Attachment 2 to NOC-AE-14003190 - ALION-REP-STP-8998-14, Strainer Test Plan in Support of STP Pilot Risk-Informed GSI-191 Pilot Licensing Application, NOC-AE-15003220, Description of Revised Risk-Informed Methodology and Responses to Round 2 Requests for Additional Information Regarding STP Risk-Informed GSI-191 Licensing Application... further results
|
MONTHYEARML13323B1962012-06-12012 June 2012
Attachment 4: CHLE-008, Rev. 3, Debris Bed Preparation and Formation Test Results.
Project stage: Other
ML13323B1942012-08-11011 August 2012
Attachment 3: CHLE-007, Rev. 3, Debris Bed Requirements and Preparation Procedures.
Project stage: Other
NOC-AE-13003040, Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test.2012-08-13013 August 2012
Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test.
Project stage: Other
ML13323B1912012-08-14014 August 2012
Attachment 2: CHLE-006, Rev. 1, STP Material Calculations.
Project stage: Other
ML13323B1982012-08-19019 August 2012
Attachment 5: CHLE-010, Rev. 2, Chle Tank Test Results for Blended and NEI Fiber Beds with Aluminum Addition.
Project stage: Other
ML13323B2002013-01-0909 January 2013
Attachment 6: CHLE-012, Rev. 3, T1 Mbloca Test Report, Figure 53 Through End
Project stage: Other
ML13323B1992013-01-0909 January 2013
Attachment 6: CHLE-012, Rev. 3, T1 Mbloca Test Report, Cover Through Figure 52
Project stage: Other
ML13323B2022013-01-15015 January 2013
Attachment 8: CHLE-015, Rev. 3, Summary of Chemical Effects Testing in 2012 for STP GSI-191 License Submittal.
Project stage: Other
ML13323B2042013-01-22022 January 2013
Attachment 9: CHLE-016, Rev. 2, Calculated Material Release to Estimate Chemical Effects.
Project stage: Other
ML13323B2012013-01-22022 January 2013
Attachment 7: CHLE-014, Rev. 2, T2 LBLOCA Test Report.
Project stage: Other
NOC-AE-13002954, Pilot Submittal and Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-1912013-01-31031 January 2013
Pilot Submittal and Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191
Project stage: Request
ML13214A0312013-08-13013 August 2013
Acceptance Review, Exemption Requests and License Amendment Request to Revise UFSAR for Resolution of Generic Safety Issue 191, Assessment of Debris Accumulation on PWR Sump Performance (TAC MF0613-MF0614; MF2400-09)
Project stage: Acceptance Review
ML13323B2072013-09-16016 September 2013
Attachment 10: CHLE-018, Rev. 2, Results of Bench Tests to Assess Corrosion of Aluminum in STP Containment Conditions.
Project stage: Other
ML13323B2082013-09-23023 September 2013
Attachment 11: CHLE-019, Rev. 2, Test Results for Chemical Effect Tests Stimulating Corrosion and Precipitation (T3 & T4)
Project stage: Other
NOC-AE-13003039, Corrections to Information Provided in Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)2013-10-0303 October 2013
Corrections to Information Provided in Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)
Project stage: Other
ML13323B2092013-10-0404 October 2013
Attachment 12: CHLE-020, Rev. 2, Test Results for a 10-day Chemical Effects Test Simulating LBLOCA Conditions (T5).
Project stage: Other
ML13323A1892013-10-22022 October 2013
Enclosure 4-2 - Risk-Informed Closure of GSI-191, Volume 2 Probabilistic Risk Analysis
Project stage: Other
ML13323B1872013-10-31031 October 2013
Project, Units 1 & 2, Submittal of GSI-191 Chemical Effects Test Reports (TAC Nos. MF2400 and MF2401)
Project stage: Other
ML13323A1912013-11-0606 November 2013
Enclosure 4-3 Risk-Informed Closure of GSI-191, Volume 3, Engineering (Casa Grande) Analysis, Page 212 of 1-122
Project stage: Other
ML13323A1902013-11-0606 November 2013
Enclosure 4-3 Risk-Informed Closure of GSI-191, Volume 3, Engineering (Casa Grande) Analysis, Cover - Page 211 of 248
Project stage: Other
ML13323A1862013-11-12012 November 2013
Enclosure 4-1 - Risk-Informed Closure of GSI-191, Volume 1
Project stage: Other
ML13323A1852013-11-13013 November 2013
Enclosure 3 - License Amendment Request for STP Piloted Risk-Informed Approach to Closure for GSI-191
Project stage: Request
NOC-AE-13003043, Enclosure 5 - Response to NRC Supplemental Information Items2013-11-13013 November 2013
Enclosure 5 - Response to NRC Supplemental Information Items
Project stage: Supplement
ML13323A1832013-11-13013 November 2013
Project Units 1 and 2 - Supplement 1 to Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)-191
Project stage: Supplement
NOC-AE-13003054, Supplement 1 to Revised STP Pilot Submittal for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)-191 to Supersede and Replace the Revised Pilot Submittal2013-11-21021 November 2013
Supplement 1 to Revised STP Pilot Submittal for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)-191 to Supersede and Replace the Revised Pilot Submittal
Project stage: Supplement
ML13330B2222013-12-0505 December 2013
Notice of 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 (TAC MF2400-MF24
Project stage: Meeting
NOC-AE-13003070, Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application2013-12-23023 December 2013
Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application
Project stage: Request
NOC-AE-13003065, Response to STP-GSI-191-EMCB-RAI-12013-12-23023 December 2013
Response to STP-GSI-191-EMCB-RAI-1
Project stage: Other
ML13357A2662013-12-24024 December 2013
1/8/14 - Notice of Meeting with STP Nuclear Operating Co. 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
Project stage: Meeting
NOC-AE-13003057, Response to Request for Additional Information Re Use of RELAP5 in Analyses for Risk-Informed GSI-191 Licensing Application2014-01-0909 January 2014
Response to Request for Additional Information Re Use of RELAP5 in Analyses for Risk-Informed GSI-191 Licensing Application
Project stage: Response to RAI
ML14009A3072014-01-0909 January 2014
NRR E-mail Capture - Request for Additional Information - TACs MF2400 Through MF2409
Project stage: RAI
ML14015A0452014-01-14014 January 2014
NRR E-mail Capture - Rai'S Regarding South Texas Project'S Submittal for Risk-Informed Resolution of GS-191
Project stage: Other
ML13358A0622014-01-14014 January 2014
Summary of 12/16/13 Meeting with STP Nuclear Operating Co. 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
Project stage: Meeting
ML14052A0532014-02-13013 February 2014
Project Units 1 & 2, Submittal of Casa Grande Code & Analyses for Risk-Informed GSI-191 Licensing Application
Project stage: Other
NOC-AE-14003081, STP-Specific Casa Grande Inputs CASA01 JT4, CASA09 JT4, CASA22 JT4, CASA26 JT4, & CASA43 JT42014-02-13013 February 2014
STP-Specific Casa Grande Inputs CASA01 JT4, CASA09 JT4, CASA22 JT4, CASA26 JT4, & CASA43 JT4
Project stage: Request
ML14149A4352014-02-14014 February 2014
Project, Units 1 and 2 - ALION-REP-STP-8998-02, Rev. 0, STP Casa Grande Analysis and LAR Enclosure 4-3 RAI Response, Enclosure 1 to Attachment 1
Project stage: Other
ML14072A0842014-02-18018 February 2014
CHLE-012, T1 Mbloca Test Report, Revision 4
Project stage: Request
ML14072A0792014-02-22022 February 2014
CHLE-020, Test Results for 10-Day Chemical Effects Test Simulating LBLOCA Condition (T5), Revision 3
Project stage: Request
ML14072A0852014-02-22022 February 2014
CHLE-014, T2 LBLOCA Test Report, Revision 3
Project stage: Request
ML14072A0822014-02-23023 February 2014
CHLE-008, Debris Bed Preparation & Formation Test Results, Revision 4
Project stage: Request
ML14072A0832014-02-24024 February 2014
CHLE-010, Chle Tank Test Results for Blended and NEI Fiber Beds with Aluminum Addition, Revision 3
Project stage: Request
ML14072A0762014-02-27027 February 2014
Project, Units 1 and 2, Submittal of GSI-191 Chemical Effects Test Reports (TAC Nos. MF2400 and MF2401)
Project stage: Other
ML14072A2112014-03-0606 March 2014
NRR E-mail Capture - STP Sensitivity Report and Presentation for Proposed Meeting
Project stage: Request
NOC-AE-14003082, Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 32014-03-11011 March 2014
Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 3
Project stage: Other
ML14086A3862014-03-17017 March 2014
STP Risk-Informed GSI-191 Aadb RAI 3 Response, Attachment 2
Project stage: Other
ML14086A3852014-03-17017 March 2014
Project, Units 1 & 2 - Response to NRC Accident Dose Branch Request for Additional Information Regarding STP Risk-Informed GSI-191 Application
Project stage: Request
NOC-AE-14003111, Submittal of Casa Grande Source Code for Stp'S Risk-Informed GSI-191 Licensing Application2014-03-18018 March 2014
Submittal of Casa Grande Source Code for Stp'S Risk-Informed GSI-191 Licensing Application
Project stage: Other
NOC-AE-14003114, Seismic Hazard and Screening Report (CEUS Sites), Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai..2014-03-31031 March 2014
Seismic Hazard and Screening Report (CEUS Sites), Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai..
Project stage: Request
ML14091A4522014-04-0808 April 2014
Request for Withholding Information from Public Disclosure - 12/9/13 G. Powell, STPNOC Affidavit Enclosing RELAP5 Digital Media Related to GSI-191 License Amendment and Exemption Requests
Project stage: Withholding Request Acceptance
ML14087A0752014-04-15015 April 2014
Request for Additional Information, Request for Exemptions and Revised Pilot License Amendment Request for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191
Project stage: RAI
2013-12-05
[Table View] |
4/22/2015 Summary of 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, Units 1 and 2 (TAC MF2400 t| ML15177A104 |
| Person / Time |
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| Site: |
South Texas  |
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| Issue date: |
07/21/2015 |
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| From: |
Lisa Regner
Plant Licensing Branch IV |
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| To: |
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| Regner L |
| References |
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| TAC MF2400, TAC MF2401, TAC MF2402, TAC MF2403, TAC MF2404, TAC MF2405, TAC MF2406, TAC MF2407, TAC MF2408, TAC MF2409 |
| Download: ML15177A104 (5) |
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Category:Meeting Summary
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2024-05-06
[Table view] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 21, 2015 LICENSEE: STP Nuclear Operating Company FACILITY: South Texas Project, Units 1 and 2
SUBJECT:
SUMMARY
OF APRIL 22, 2015, 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 GENERIC SAFETY ISSUE 191, "ASSESSMENT OF DEBRIS ACCUMULATION ON PWR SUMP PERFORMANCE" (TAC NOS. MF2400, MF2401, MF2402, MF2403, MF2404, MF2405, MF2406, MF2407, MF2408, AND MF2409)
On April 22, 2015, a public meeting 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 February 13, 2015, are located in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML15091A578. The licensee's handouts from the meeting are available in ADAMS at Accession Nos. ML15111A056 and ML15111A058. An NRC staff handout is available at ADAMS Accession No. ML15112A256. A list of meeting attendees is provided in the Enclosure to this meeting summary.
By letter dated June 19, 2013 (ADAMS Accession No. ML131750250), as supplemented by letters dated October 3, October 31, November 13, November 21, and December 23, 2013 (two letters); and January 9, February 13, February 27, March 17, March 18, May 15 (two letters),
May 22, June 25, and July 15, 2014, March 10, and March 25, 2015 (ADAMS Accession Nos.
ML13295A222, ML13323A673, ML13323A128, ML13338A165, ML14015A312, ML14015A311, ML14029A533, ML14052A053, ML14072A076, ML14086A383, ML14087A126, ML14149A353, ML14149A354, ML14149A434, ML14178A481, ML14202A045, ML15072A092, and ML15091A440, respectively), STPNOC submitted exemption requests accompanied by a license amendment request (LAR) 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 teleconference call was to discuss the licensee's proposed structure of the methodology change submittal which the licensee plans to provide to the staff in June 2015. The June 2015 supplement will provide information on the new Risk over Deterministic methodology, and modify the license amendment requests and exemptions. Another purpose was to provide NRC staff feedback on the request for additional information (RAI) response received from STPNOC by letter dated March 25, 2015.
Meeting Summary The NRC staff noted that an on-site regulatory audit is planned for May 12-14, 2015, so the staff can perform an in-depth review of the analyses performed by the licensee as a resolution to specific portions of GSl-191 employing a risk-informed approach. The risk-informed approach, referred by the licensee as 'RoverD,' and related computations are documented in Attachment 7 in the licensee's letter dated March 25, 2015. The objective of the audit is to evaluate technical approaches implemented in support of the Rovero methodology and to identify related verification and validation activities.
The licensee and NRC staff discussed the licensee's response to question AADB 3 (ADAMS package Accession No. ML14086A383). The staff provided a new question requesting confirmation of the reliability and sufficiency of the containment spray pumps to meet the requirements of Title 10 of the Code of Federal Regulations (10 CFR), Section 50.67, "Accident source term," 10 CFR Part 50, Appendix A General Design Criteria (GDC) 19 "Control room," 10 CFR 20.1201 "Occupational Dose Limits for Adults," and that they will continue to meet the alternate source term criteria in Regulatory Guidance 1.183 (ADAMS Accession No. ML15112A256).
The NRC staff questioned an assumption in the licensee's large early release frequency (LERF) calculation (i.e., a ratio approach to estimate the LERF attributable to any increase in core damage frequency (CDF) from debris). The NRC staff informed the licensee that it plans to review the LERF calculation during the May audit.
The NRC staff noted reactor compartment coatings concerns regarding the licensee's crud estimates and the use of 5 diameters for unqualified coatings debris size versus the 10 diameters estimates specified in a revision to the NRG-staff approved guidance by letter dated April 6, 201 O (ADAMS Accession No. ML100960495). These will be topics for the next bi-weekly public conference call scheduled for May 6, 2015, at 3:00 p.m. eastern time. Other topics for discussion at the May 5th meeting include the exemption requests, defense-in-depth and safety margin discussion, and debris transport and generation.
No public comments were received and no Public Meeting Feedback Forms were received for this meeting. Please direct any inquiries to me at 301-415-1906, or lisa.regner@nrc.gov.
isa 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 APRIL 22. 2015. CONFERENCE CALL 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)
John Stang NRC Victor Cusumano NRC Caroline Tilton NRC Ashley Guzzetta NRC Steve Smith NRC CJ Fong NRC Jerry Dozier NRC Matt Yoder NRC Paul Klein NRC Osvaldo Pensado Southwest Research Institute (contractor for NRC)
Steve Blossom STP Nuclear Operating Company (STPNOC)
Drew Richards STPNOC Ernie Kee STPNOC Wayne Harrison STPNOC Linda Dyer STPNOC Bruce Letellier Ali on Ron Holloway Wolf Creek Nuclear Generating Corporation Jeremy Tejada University of Texas at Austin Tim Sande Enercon Enclosure
ML15177A104 *by email OFFICE NRR/DORL/LPL4-1 /PM NRR/DORL/LPL4-1 /LA NRR/DSS/STSB/BC* NRR/DSS/SSIB/BC*
NAME LRegner JBurkhardt RElliott VCusumano DATE 6/25/15 6/26/15 7/8/15 7/8/15 OFFICE NRR/DRA/APLA/BC* NRR/DE/ESGB/BC* NRR/DRA/ARCB/BC* NRR/DORL/LPL4-1 /BC NRR/DORL/LPL4-1 /PM NAME SRosenberg GKulesa US hoop MMarkley LRegner DATE 7/8/15 7/10/15 7/15/15 7/21/15 7/21/15