|
|
| (One intermediate revision by the same user not shown) |
| Line 3: |
Line 3: |
| | issue date = 10/01/2015 | | | issue date = 10/01/2015 |
| | title = 10-01-15 Public Phone Call | | | title = 10-01-15 Public Phone Call |
| | 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 = | | | license number = |
| | contact person = Regner L M | | | contact person = Regner L |
| | case reference number = GL-04-002, GSI-191 | | | case reference number = GL-04-002, GSI-191 |
| | document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs | | | document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs |
| Line 16: |
Line 16: |
|
| |
|
| =Text= | | =Text= |
| {{#Wiki_filter:Description of Supplement 2 to STPNOC Risk-Informed Licensing Application to Address GSI-191 and Respond to GL-2004-02Public Phone Call Meeting with NRCOctober 1, 2015 Introduction and AgendaIntroduction of STP participantsDesired Outcomes:NRC staff understand the STPNOC licensing application and the changes from the previous supplement Resolve NRC questions and establish follow-up to resolve questions that remain openIdentify steps remaining for going forward with the application2 Introduction and AgendaAgendaOverview of changes from November 13, 2013 letter (ML13323A183)Effect on reported resultsConservatism and acceptability of revised approachRoverD In-Vessel Cooling AnalysisSpecific Focus AreasDebris Test MarginFollow-up and Going Forward Actions3 Overview of Changes from November 13, 2013 LetterChanged methodology to explicitly incorporate certain deterministically-RoverD) that was described in March 25, 2015 letter (ML15091A440)Added the plant-specific testing deterministic basis (Letter Attachment 1-2)Addressed all the NRC content guide questions and responded to earlier RAIs (Letter Attachment 1-5)Added the RoverDrisk-informed description (Letter Attachment 1-3)Expanded Defense-in-Depth and Safety Margin discussion (Letter Attachment 1-4)Clarification on exemptions))Clarified that a specific exemption to single failure is not being requestedAdded proposed Technical Specification change for debris-specific effects (Letter Attachment 3)4 Overview of Changes from November 13, 2013 LetterWhat is no longer in the scope of the application and should not be part of the review, including RAI responses:CASA Grande calculation of conditional failure probabilitiesUse of correlations for head -Uncertainty quantification of pipe break probability distributions; replaced with conservative estimatesTime dependent debris transportUse of STP PRA for calculation of delta CDF; used only for delta LERFApplications of CASA Grande that are still usedDebris generationDebris arrival to the containment pool (non-time dependent)5 Results with Revised Methodology Remain in RG 1.174 Region IIIConclusions are unchanged with revised methodology2015 RoverD: -07/yr, -10/yr2013 CASA Grande/PRA: -08/yr, -11/yr6 Conservatism and Acceptability of Revised Approach7 Conservatism and Acceptability of Revised ApproachDeterministically tested debrisQualitative margin evaluation of July 2008 test determined that low density fiberglass is the only debris source term not bounded by the testUsed weld/break characteristics from NUREG 1829Considers various break types and locationsConservatisms used in transport calculation8 RoverD In-Vessel Cooling Analysis T-H and Debris Analyses Show Adequate Long-Term CoolingAnalysis assuming total blockage of core and core bypass shows that there is sufficient cooling for all HLB and all SLOCA (CLB and HLB)FA tests show that there is insignificant pressure drop for bounding HLB conditions (DEGB, no credit for decay heat at time of recirculation) with 15 gm/FA including chemical effectsSTP strainer penetration testing shows that for all CLB, << 15gm/FA accumulates on the coreShows there is no CLB with potential for in-core debris effects, independent of T-H analysisConfirms that all risk-informed debris effects scope is due to blockage at the strainer9 Specific Focus ItemsBreaks that have bounding debris transport fractions do not have direct spill paths to the containment floorTransport evaluation included 1, 2, and 3 trains operatingTransport metrics from NUREG/CR 6772, NUREG/CR 6808, and Law were applied.Evaluation of transport of unqualified epoxy, particulate, and chips shows sufficient marginErosion MethodologySTP conditions are bounded by 30-day erosion testing showing factors below 10%Methodology shown in Table 10 of Att. 1-2 of 8/20/15 letterEarly or late arrival is based on initial blow-down to pool or wash down by spraySmall and large percentage are the eroded fractions from small and large debrisEarly and late arrival of fines based on initial blow-down to pool or wash down by sprayMargin evaluation of July 2008 test shows that low density fiberglass is the only debris source term not bounded by the test10 Debris Test Margin11LDFG fines accounted for in the risk-informed portionMicrothermand Epoxy offset by:MariniteZinc Follow-up and Going Forward ActionsNovember public meeting to resolve outstanding questions12}} | | {{#Wiki_filter:Description of Supplement 2 to STPNOC Risk-Informed Licensing Application to Address GSI-191 and Respond to GL-2004-02 Public Phone Call Meeting with NRC October 1, 2015 |
| | |
| | Introduction and Agenda |
| | * Introduction of STP participants |
| | * Desired Outcomes: |
| | * NRC staff understand the STPNOC licensing application and the changes from the previous supplement |
| | * Resolve NRC questions and establish follow-up to resolve questions that remain open |
| | * Identify steps remaining for going forward with the application 2 |
| | |
| | Introduction and Agenda |
| | * Agenda |
| | * Overview of changes from November 13, 2013 letter (ML13323A183) |
| | * Effect on reported results |
| | * Conservatism and acceptability of revised approach |
| | * RoverD In-Vessel Cooling Analysis |
| | * Specific Focus Areas |
| | * Debris Test Margin |
| | * Follow-up and Going Forward Actions 3 |
| | |
| | Overview of Changes from November 13, 2013 Letter |
| | * Changed methodology to explicitly incorporate certain deterministically-based elements Risk over Deterministic approach (RoverD) that was described in March 25, 2015 letter (ML15091A440) |
| | * Added the plant-specific testing deterministic basis (Letter Attachment 1-2) |
| | * Addressed all the NRC content guide questions and responded to earlier RAIs (Letter Attachment 1-5) |
| | * Added the RoverD risk-informed description (Letter Attachment 1-3) |
| | * Expanded Defense-in-Depth and Safety Margin discussion (Letter Attachment 1-4) |
| | * Clarification on exemptions |
| | * Changed exemption to 10CFR50.46 to be to other requirements (10CFR50.46(d)) |
| | * Clarified that a specific exemption to single failure is not being requested |
| | * Added proposed Technical Specification change for debris-specific effects (Letter Attachment 3) 4 |
| | |
| | Overview of Changes from November 13, 2013 Letter |
| | * What is no longer in the scope of the application and should not be part of the review, including RAI responses: |
| | * CASA Grande calculation of conditional failure probabilities |
| | * Use of correlations for head loss, including bump-up factors |
| | * Uncertainty quantification of pipe break probability distributions; replaced with conservative estimates |
| | * Time dependent debris transport |
| | * Use of STP PRA for calculation of delta CDF; used only for delta LERF |
| | * Applications of CASA Grande that are still used |
| | * Debris generation |
| | * Debris arrival to the containment pool (non-time dependent) 5 |
| | |
| | Results with Revised Methodology Remain in RG 1.174 Region III |
| | * Conclusions are unchanged with revised methodology |
| | * 2015 RoverD: CDF: 1.23E-07/yr, LERF: 3.08E-10/yr |
| | * 2013 CASA Grande/PRA: CDF: 2.88E-08/yr, LERF: 1.40E-11/yr 6 |
| | |
| | Conservatism and Acceptability of Revised Approach 7 |
| | |
| | Conservatism and Acceptability of Revised Approach |
| | * Deterministically tested debris |
| | * Qualitative margin evaluation of July 2008 test determined that low density fiberglass is the only debris source term not bounded by the test |
| | * Used weld/break characteristics from NUREG 1829 |
| | * Considers various break types and locations |
| | * Conservatisms used in transport calculation 8 |
| | |
| | RoverD In-Vessel Cooling Analysis |
| | * T-H and Debris Analyses Show Adequate Long-Term Cooling |
| | * Analysis assuming total blockage of core and core bypass shows that there is sufficient cooling for all HLB and all SLOCA (CLB and HLB) |
| | * FA tests show that there is insignificant pressure drop for bounding HLB conditions (DEGB, no credit for decay heat at time of recirculation) with 15 gm/FA including chemical effects |
| | * STP strainer penetration testing shows that for all CLB, << 15gm/FA accumulates on the core |
| | * Shows there is no CLB with potential for in-core debris effects, independent of T-H analysis |
| | * Confirms that all risk-informed debris effects scope is due to blockage at the strainer 9 |
| | |
| | Specific Focus Items |
| | * Breaks that have bounding debris transport fractions do not have direct spill paths to the containment floor |
| | * Transport evaluation included 1, 2, and 3 trains operating |
| | * Transport metrics from NUREG/CR 6772, NUREG/CR 6808, and Stokes Law were applied. |
| | * Evaluation of transport of unqualified epoxy, particulate, and chips shows sufficient margin |
| | * Erosion Methodology |
| | * STP conditions are bounded by 30-day erosion testing showing factors below 10% |
| | * Methodology shown in Table 10 of Att. 1-2 of 8/20/15 letter |
| | * Early or late arrival is based on initial blow-down to pool or wash down by spray |
| | * Small and large percentage are the eroded fractions from small and large debris |
| | * Early and late arrival of fines based on initial blow-down to pool or wash down by spray |
| | * Margin evaluation of July 2008 test shows that low density fiberglass is the only debris source term not bounded by the test 10 |
| | |
| | Debris Test Margin DEBRIS AMOUNTS FOR JULY 2008 TEST Debris Item Debris Amount Comment |
| | * LDFG fines accounted for in the risk-Test Surrogate Material informed portion LDFG Fibers Total Fines 79.91 ft3 / Nukon Not bounding; was based on |
| | * Microtherm and Epoxy offset by: |
| | Total Smalls 158.48 ft3 / Nukon 7D ZOI |
| | * Marinite Particulates Microtherm 33 lbm / Microtherm powder Not bounding; subsequently |
| | * Zinc shown to be 29.3 lbm more Marinite Board 182.7 lbm Bounding; subsequently Powdered Marinite board removed from containment Latent particulate, dust, dirt 141.1 lbm / Dirt mix Bounding Coatings Zinc 1,368 lbm / Tin Powder Bounding; subsequently shown to be 637 lbm less Polyamide primer 10 lbm / Powder (Acrylic Bounding coating) |
| | Alkyds 247 lbm / Powder (Acrylic Bounding coating) |
| | Baked enamel 268 lbm / Powder (Acrylic Bounding coating) |
| | Epoxy (outside ZOI) 106 lbm / Chips (Acrylic Not bounding; subsequently 1/64 to 1/4) shown to be 259 lbm more Epoxy (ZOI) 57 lbm / Powder (Acrylic coating) |
| | Total powder 1,950 lbm Total chips 106 lbm Chemical Precipitates Sodium Aluminum Silicate 1,432 lbm / WCAP AlOOH Bounding Aluminum Oxyhydroxide 143 lbm / WCAP AlOOH Bounding Calcium Phosphate 359 lbm / WCAP Ca3(PO4)2 Bounding 11 |
| | |
| | Follow-up and Going Forward Actions |
| | * November public meeting to resolve outstanding questions 12}} |
Letter Sequence Request |
|---|
CAC:MF2400, Control Room Habitability (Approved, Closed) CAC:MF2402, 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] |
|
|---|
Category:Meeting Briefing Package/Handouts
MONTHYEARML22243A1312022-08-31031 August 2022
STP Nuclear Operating Company August 31, 2022 Presentation - Pre-Submittal Meeting for Updated Main Steam Line Break and Locked Rotor Dose Consequence Analysis to Address Extended Cooldown Timelines
ML22214A0972022-08-0202 August 2022
Presentation by South Texas Project
ML22153A2942022-06-17017 June 2022
richardsd-hv-th28
ML21203A2702021-07-26026 July 2021
Presentation - 7-26-21 Meeting with STPNOC Proposed South Texas Project Moderator Temperature Coefficient TS Change
ML20125A3362020-05-0404 May 2020
STP Presubmittal Meeting Exigent Accumulator LAR 2020-05-05 Presentation L-2020-LRM-0039
ML19326A0072019-11-22022 November 2019
Pre-Application Public Meeting for Proposed License Amendment Request to Revise the STPEGS Emergency Plan - December 3, 2019
ML16356A0612016-12-21021 December 2016
12/21/2016 South Texas Project Aluminum Bronze Aging Management Request for Additional Information
ML16264A3632016-09-20020 September 2016
Pre-Application Public Meeting for Proposed License Amendment Request to Revise the STPEGS Emergency Plan Staff Augmentation Times
ML16210A0442016-07-28028 July 2016
STP Nuclear Operating Company Handouts for July 28, 2016 Public Meeting on GSI-191
ML16172A0192016-07-25025 July 2016
STP Aluminum Bronze Selective Leaching Public Meeting - June 21, 2016
ML16202A4872016-07-21021 July 2016
07/21/2016 Talking Points, Supplemental Information for South Texas Project and NRC Public Meeting
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)
ML16062A3042016-03-0202 March 2016
TS 5.3.2 LAR Pre-Submittal Meeting Presentation - March 2, 2016
ML16033A0042016-01-19019 January 2016
Applicant's Slides for STP Meeting on Aluminum Bronze Aging Management
ML15274A5992015-10-0101 October 2015
10-01-15 Public Phone Call
ML15271A3042015-09-28028 September 2015
Public Phone Call Meeting Description of Supplement 2 to STPNOC Risk-Informed Licensing Application to Address GSI-191 and Respond to GL-2004-02
ML15111A0582015-04-15015 April 2015
Licensee Handouts (2 of 2) for 4/22/2015 Public Meeting Possible Roverd Section on Fixed Filtration (TAC Nos. MF2400-MF2409)
ML15111A0562015-04-15015 April 2015
Licensee Handouts (1 of 2) for 4/22/2015 Public Meeting Revised Roverd Section on Large Early Release Frequency Change for Large Break Loss-of-Coolant Accident(Tac Nos. MF2400-MF2409)
ML15056A3862015-02-25025 February 2015
NRC Slides for February 25, 2015 Public Meeting with STPNOC Concerning GSI-191
ML15049A4882015-02-18018 February 2015
Slides for February 25, 2015 Public Meeting
ML15034A1512015-02-0505 February 2015
Integrated Leak Rate Test (ILRT) from 10 Years to 15 Years. NRC Public Meeting Slides - ILRT License Amendment
ML15034A1142015-02-0404 February 2015
STP Risk- Informed Approach to GSI - 191 Roverd 2015 Meeting Blue 1 29 15
ML14192A9842014-08-0404 August 2014
Summary of Pre-Licensing Meeting with STP Nuclear Operating Company to Discuss Future License Amendment Request to Revise TS 6.9.1.6.b.9 to the Leading Edge Flow Meter Technology for Feedwater Flow Measurement
ML14120A0112014-04-29029 April 2014
4/29/2014 - South Texas Project Regulatory Approach for Risk-Informed Pilot Submittal Presentation Relating to 10 CFR 50.46c
ML13352A1422013-12-16016 December 2013
GSI-191 Licensing Submittal Comparison of Changes Between Rev 1 and Rev 2
ML13352A1242013-12-16016 December 2013
NRC Staff Slides South Texas Project Risk-Informed Generic Safety Issue - 191, December 16, 2013
ML13316B9052013-11-13013 November 2013
Albrz Testing Update for NRR Final
ML13150A2162013-05-23023 May 2013
Licensee Slides for 5/23/13 Public Meeting Regarding GSI-191
ML13140A2562013-05-20020 May 2013
Licensee Slides for 5/23/13 Meeting - STP Pilot Submittal for Risk Informed Approach to Resolving GSI-191
ML13023A3342013-02-25025 February 2013
1/15/2013 Summary of Public Meetings Conducted to Discuss Draft Supplemental Environmental Impact Statement Related to Review of South Texas Project, Units 1 & 2, License Renewal Application
ML13051A8552013-02-20020 February 2013
Licensee Slides for 3/5/13 Pre-Application Meeting for Proposed Licensing Action to Revise the Fire Protection Program at STP
ML13029A4972013-01-15015 January 2013
Slides - Preliminary Site-Specific Results of the Environmental Review for South Texas Project License Renewal
ML12297A3312012-11-27027 November 2012
Summary of Prelicensing Meeting with STP Nuclear Operating Company to Discuss Proposed Amendment for Approval of Revised Fire Protection Program Related to Alternate Shutdown Capability for South Texas, Units 1 and 2
ML12264A3202012-10-11011 October 2012
Meeting Handout for 10/11/12 Pre-licensing Meeting License Amendment Request to Revise the Fire Protection Program
ML12145A4382012-05-18018 May 2012
Licensee Handout on Calibration and Benchmarking of Single and Two-Phase Jet Cfd Models
ML1209004042012-03-30030 March 2012
3-27-2012 - STP Public Meeting Handout from Nuclear Innovation North America, LLC on Fukushima Lessons Learned for South Texas Project Units 3 and 4
ML1205407582012-02-22022 February 2012
STP Summary of January Meeting
ML1205405572012-02-22022 February 2012
Licensee Slides for 03/1/12 Meeting with STP Nuclear Operating Company Meeting to Discuss GSI-191
ML1205405702012-02-22022 February 2012
Uncertainty Modeling of LOCA Frequencies and Break Size Distributions for the STP GSI-191 Resolution
ML1204400652012-02-0909 February 2012
Licensee Slides for 2/9/12 Meeting Regarding GSI-191
ML1133505632011-12-0101 December 2011
Licensee Presentation from 12/1/11 Meeting Via Conference Call to Discuss Risk-Informed GSI-191,Assessment of Debris Accumulation on Pressurized Water Reactor Sump Performance
ML1130506322011-10-26026 October 2011
Licensee Handouts from November 1, 2011 Meeting with STP Nuclear Operating Company on GSI-191
ML1127702032011-10-0303 October 2011
Licensee Slides from 10/3/11 Meeting LOCA Frequencies, Final Results
ML1127701762011-10-0303 October 2011
Licensee Handouts from 10/3/11 Meeting STP LOCA Frequency
ML1123508732011-08-22022 August 2011
Models and Methods Used for Casa Grande
ML1123508832011-08-22022 August 2011
LOCA Initiating Event Frequencies and Uncertainties Status Report
ML1120707072011-07-26026 July 2011
Meeting Notice with South Texas Project, Units 1 and 2 - Licensee Slide Models and Methods Used for Casa Grande
ML1120707292011-07-26026 July 2011
Meeting Notice with South Texas Project, Units 1 and 2 - Licensee Slides Computational Fluid Dynamics Validation Plan
ML1118903802011-07-0707 July 2011
Licensee Slides, LOCA Initiating Event Frequencies and Uncertainties(Draft)
ML1118904082011-07-0606 July 2011
Licensee Handout Loca Frequencie Approach and Example Application
2022-08-31
[Table view]
Category:Slides and Viewgraphs
MONTHYEARML22243A1312022-08-31031 August 2022
STP Nuclear Operating Company August 31, 2022 Presentation - Pre-Submittal Meeting for Updated Main Steam Line Break and Locked Rotor Dose Consequence Analysis to Address Extended Cooldown Timelines
ML22214A0972022-08-0202 August 2022
Presentation by South Texas Project
ML22153A2942022-06-17017 June 2022
richardsd-hv-th28
ML21203A2702021-07-26026 July 2021
Presentation - 7-26-21 Meeting with STPNOC Proposed South Texas Project Moderator Temperature Coefficient TS Change
ML20248H5322020-09-0404 September 2020
STP Nuclear Operating Company September 14, 2020, Presentation - Pre-Submittal Meeting for Proposed South Texas Project Moderator Temperature Coefficient Surveillance Requirement Technical Specification Change
ML20125A3362020-05-0404 May 2020
STP Presubmittal Meeting Exigent Accumulator LAR 2020-05-05 Presentation L-2020-LRM-0039
ML20034E8192020-02-0606 February 2020
Pre-Application Public Meeting for Proposed License Amendment Request to Revise the STPEGS Emergency Plan
ML19095A6562019-04-0404 April 2019
NRR E-mail Capture - (External_Sender) Handout for 4/10/19 Meeting to Discuss a Proposed Request for South Texas Project, Units 1 and 2, Regarding Repair of Piping Using Carbon Fiber Repair Methods
ML17004A0292017-01-0404 January 2017
Slides for January 4, 2017, Public Meeting on South Texas Project's Resposne to Aluminum Bronze Aging Management Request for Additional Information
ML16356A0612016-12-21021 December 2016
12/21/2016 South Texas Project Aluminum Bronze Aging Management Request for Additional Information
ML16350A3272016-11-17017 November 2016
Transcript of Advisory Committee on Reactor Safeguards Plant License Renewal Subcommittee Meeting - November 17, 2016
ML16264A3632016-09-20020 September 2016
Pre-Application Public Meeting for Proposed License Amendment Request to Revise the STPEGS Emergency Plan Staff Augmentation Times
ML16172A0192016-07-25025 July 2016
STP Aluminum Bronze Selective Leaching Public Meeting - June 21, 2016
ML16188A3682016-07-0606 July 2016
Audit Presentation - Westinghouse Methodology for South Texas Unit 1 LAR: Operation with 56 Control Rods
ML16062A3042016-03-0202 March 2016
TS 5.3.2 LAR Pre-Submittal Meeting Presentation - March 2, 2016
ML16033A0042016-01-19019 January 2016
Applicant's Slides for STP Meeting on Aluminum Bronze Aging Management
ML15334A3972015-11-30030 November 2015
TS 5 3 2 Emergency LAR Pre-Submittal Meeting Presentation
ML15274A5992015-10-0101 October 2015
10-01-15 Public Phone Call
ML15034A1512015-02-0505 February 2015
Integrated Leak Rate Test (ILRT) from 10 Years to 15 Years. NRC Public Meeting Slides - ILRT License Amendment
ML15034A1142015-02-0404 February 2015
STP Risk- Informed Approach to GSI - 191 Roverd 2015 Meeting Blue 1 29 15
ML14192A9842014-08-0404 August 2014
Summary of Pre-Licensing Meeting with STP Nuclear Operating Company to Discuss Future License Amendment Request to Revise TS 6.9.1.6.b.9 to the Leading Edge Flow Meter Technology for Feedwater Flow Measurement
ML14149A0892014-05-21021 May 2014
NRR E-mail Capture - STP-GSI-191 Presentation
ML14120A0112014-04-29029 April 2014
4/29/2014 - South Texas Project Regulatory Approach for Risk-Informed Pilot Submittal Presentation Relating to 10 CFR 50.46c
ML13352A1242013-12-16016 December 2013
NRC Staff Slides South Texas Project Risk-Informed Generic Safety Issue - 191, December 16, 2013
ML13352A1422013-12-16016 December 2013
GSI-191 Licensing Submittal Comparison of Changes Between Rev 1 and Rev 2
ML13316B9052013-11-13013 November 2013
Albrz Testing Update for NRR Final
ML13150A2162013-05-23023 May 2013
Licensee Slides for 5/23/13 Public Meeting Regarding GSI-191
ML13140A2562013-05-20020 May 2013
Licensee Slides for 5/23/13 Meeting - STP Pilot Submittal for Risk Informed Approach to Resolving GSI-191
ML13023A3342013-02-25025 February 2013
1/15/2013 Summary of Public Meetings Conducted to Discuss Draft Supplemental Environmental Impact Statement Related to Review of South Texas Project, Units 1 & 2, License Renewal Application
ML13051A8552013-02-20020 February 2013
Licensee Slides for 3/5/13 Pre-Application Meeting for Proposed Licensing Action to Revise the Fire Protection Program at STP
ML13029A4972013-01-15015 January 2013
Slides - Preliminary Site-Specific Results of the Environmental Review for South Texas Project License Renewal
ML12297A3312012-11-27027 November 2012
Summary of Prelicensing Meeting with STP Nuclear Operating Company to Discuss Proposed Amendment for Approval of Revised Fire Protection Program Related to Alternate Shutdown Capability for South Texas, Units 1 and 2
ML12264A3202012-10-11011 October 2012
Meeting Handout for 10/11/12 Pre-licensing Meeting License Amendment Request to Revise the Fire Protection Program
ML1209004042012-03-30030 March 2012
3-27-2012 - STP Public Meeting Handout from Nuclear Innovation North America, LLC on Fukushima Lessons Learned for South Texas Project Units 3 and 4
ML1204400652012-02-0909 February 2012
Licensee Slides for 2/9/12 Meeting Regarding GSI-191
ML1133505632011-12-0101 December 2011
Licensee Presentation from 12/1/11 Meeting Via Conference Call to Discuss Risk-Informed GSI-191,Assessment of Debris Accumulation on Pressurized Water Reactor Sump Performance
ML1130506322011-10-26026 October 2011
Licensee Handouts from November 1, 2011 Meeting with STP Nuclear Operating Company on GSI-191
ML1127701762011-10-0303 October 2011
Licensee Handouts from 10/3/11 Meeting STP LOCA Frequency
ML1127702032011-10-0303 October 2011
Licensee Slides from 10/3/11 Meeting LOCA Frequencies, Final Results
ML1123508832011-08-22022 August 2011
LOCA Initiating Event Frequencies and Uncertainties Status Report
ML1123508732011-08-22022 August 2011
Models and Methods Used for Casa Grande
ML1120707292011-07-26026 July 2011
Meeting Notice with South Texas Project, Units 1 and 2 - Licensee Slides Computational Fluid Dynamics Validation Plan
ML1120707072011-07-26026 July 2011
Meeting Notice with South Texas Project, Units 1 and 2 - Licensee Slide Models and Methods Used for Casa Grande
ML1118903802011-07-0707 July 2011
Licensee Slides, LOCA Initiating Event Frequencies and Uncertainties(Draft)
ML1118904202011-07-0606 July 2011
Licensee Slide from 7/7/11 Meeting with STP Nuclear
ML11157A0102011-06-0202 June 2011
STP Nuclear Operating Company, Licensee Handouts, 6/2/2011 Meeting Risk-Informed GSI-191 Closure Plan for GSI-191 Resolution
ML1114501952011-05-24024 May 2011
Summary of Meeting with South Texas Project Electric Generating Station 2010 Performance
ML1105503952011-02-22022 February 2011
Licensee Slides from 2/22/11 Public Meeting with STP Nuclear Operating Company
ML1103206432011-01-27027 January 2011
1/27/11 Presentation on Risk-Informed GSI-191 Project Overview
ML1021803392010-08-0505 August 2010
Ltr to E. Halpin Re Participation in Commission Meeting on the Resolution of Generic Safety Issue (GSI) - 191, Assessment of Debris Accumulation on Pressurized Water Reactor (PWR) Performance on 09/29/10
2022-08-31
[Table view] |
Text
Description of Supplement 2 to STPNOC Risk-Informed Licensing Application to Address GSI-191 and Respond to GL-2004-02 Public Phone Call Meeting with NRC October 1, 2015
Introduction and Agenda
- Introduction of STP participants
- NRC staff understand the STPNOC licensing application and the changes from the previous supplement
- Resolve NRC questions and establish follow-up to resolve questions that remain open
- Identify steps remaining for going forward with the application 2
Introduction and Agenda
- Overview of changes from November 13, 2013 letter (ML13323A183)
- Effect on reported results
- Conservatism and acceptability of revised approach
- RoverD In-Vessel Cooling Analysis
- Follow-up and Going Forward Actions 3
Overview of Changes from November 13, 2013 Letter
- Changed methodology to explicitly incorporate certain deterministically-based elements Risk over Deterministic approach (RoverD) that was described in March 25, 2015 letter (ML15091A440)
- Added the plant-specific testing deterministic basis (Letter Attachment 1-2)
- Addressed all the NRC content guide questions and responded to earlier RAIs (Letter Attachment 1-5)
- Added the RoverD risk-informed description (Letter Attachment 1-3)
- Expanded Defense-in-Depth and Safety Margin discussion (Letter Attachment 1-4)
- Clarification on exemptions
- Clarified that a specific exemption to single failure is not being requested
- Added proposed Technical Specification change for debris-specific effects (Letter Attachment 3) 4
Overview of Changes from November 13, 2013 Letter
- What is no longer in the scope of the application and should not be part of the review, including RAI responses:
- CASA Grande calculation of conditional failure probabilities
- Use of correlations for head loss, including bump-up factors
- Uncertainty quantification of pipe break probability distributions; replaced with conservative estimates
- Time dependent debris transport
- Use of STP PRA for calculation of delta CDF; used only for delta LERF
- Applications of CASA Grande that are still used
- Debris arrival to the containment pool (non-time dependent) 5
Results with Revised Methodology Remain in RG 1.174 Region III
- Conclusions are unchanged with revised methodology
- 2015 RoverD: CDF: 1.23E-07/yr, LERF: 3.08E-10/yr
- 2013 CASA Grande/PRA: CDF: 2.88E-08/yr, LERF: 1.40E-11/yr 6
Conservatism and Acceptability of Revised Approach 7
Conservatism and Acceptability of Revised Approach
- Deterministically tested debris
- Qualitative margin evaluation of July 2008 test determined that low density fiberglass is the only debris source term not bounded by the test
- Considers various break types and locations
- Conservatisms used in transport calculation 8
RoverD In-Vessel Cooling Analysis
- T-H and Debris Analyses Show Adequate Long-Term Cooling
- Analysis assuming total blockage of core and core bypass shows that there is sufficient cooling for all HLB and all SLOCA (CLB and HLB)
- FA tests show that there is insignificant pressure drop for bounding HLB conditions (DEGB, no credit for decay heat at time of recirculation) with 15 gm/FA including chemical effects
- STP strainer penetration testing shows that for all CLB, << 15gm/FA accumulates on the core
- Shows there is no CLB with potential for in-core debris effects, independent of T-H analysis
- Confirms that all risk-informed debris effects scope is due to blockage at the strainer 9
Specific Focus Items
- Breaks that have bounding debris transport fractions do not have direct spill paths to the containment floor
- Transport evaluation included 1, 2, and 3 trains operating
- Evaluation of transport of unqualified epoxy, particulate, and chips shows sufficient margin
- STP conditions are bounded by 30-day erosion testing showing factors below 10%
- Methodology shown in Table 10 of Att. 1-2 of 8/20/15 letter
- Early or late arrival is based on initial blow-down to pool or wash down by spray
- Small and large percentage are the eroded fractions from small and large debris
- Early and late arrival of fines based on initial blow-down to pool or wash down by spray
- Margin evaluation of July 2008 test shows that low density fiberglass is the only debris source term not bounded by the test 10
Debris Test Margin DEBRIS AMOUNTS FOR JULY 2008 TEST Debris Item Debris Amount Comment
- LDFG fines accounted for in the risk-Test Surrogate Material informed portion LDFG Fibers Total Fines 79.91 ft3 / Nukon Not bounding; was based on
- Microtherm and Epoxy offset by:
Total Smalls 158.48 ft3 / Nukon 7D ZOI
- Marinite Particulates Microtherm 33 lbm / Microtherm powder Not bounding; subsequently
- Zinc shown to be 29.3 lbm more Marinite Board 182.7 lbm Bounding; subsequently Powdered Marinite board removed from containment Latent particulate, dust, dirt 141.1 lbm / Dirt mix Bounding Coatings Zinc 1,368 lbm / Tin Powder Bounding; subsequently shown to be 637 lbm less Polyamide primer 10 lbm / Powder (Acrylic Bounding coating)
Alkyds 247 lbm / Powder (Acrylic Bounding coating)
Baked enamel 268 lbm / Powder (Acrylic Bounding coating)
Epoxy (outside ZOI) 106 lbm / Chips (Acrylic Not bounding; subsequently 1/64 to 1/4) shown to be 259 lbm more Epoxy (ZOI) 57 lbm / Powder (Acrylic coating)
Total powder 1,950 lbm Total chips 106 lbm Chemical Precipitates Sodium Aluminum Silicate 1,432 lbm / WCAP AlOOH Bounding Aluminum Oxyhydroxide 143 lbm / WCAP AlOOH Bounding Calcium Phosphate 359 lbm / WCAP Ca3(PO4)2 Bounding 11
Follow-up and Going Forward Actions
- November public meeting to resolve outstanding questions 12
