Letter Sequence Response to RAI |
---|
CAC:MF8260, (Approved, Closed) EPID:L-2016-LLA-0007, Enclosure 3 - Licensee'S Presentation-Seabrook Station, License Amendment Request 16-03 ASR Structural Evaluation Methodology (Approved, Closed) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance, Acceptance
Results
Other: ML17199T383, ML17283A040, ML18135A046, ML18204A242, ML18353A954, ML19044A768, ML19058A216, NRC-2019-0075, Federal Register Notice - License Amendment; Issuance (CAC No. MF8260; EPID L-2016-LLA-0007), SBK-L-16013, License Renewal Application Relating to the Alkali-Silica Reaction Monitoring Program, SBK-L-16181, License Renewal Application Relating to the Alkali-Silica Reaction Monitoring Program, SBK-L-17101, Update to Reply to a Notice of Violation; EA-16-101 Corrective Action Plan
|
MONTHYEARSBK-L-16013, License Renewal Application Relating to the Alkali-Silica Reaction Monitoring Program2016-08-0909 August 2016 License Renewal Application Relating to the Alkali-Silica Reaction Monitoring Program Project stage: Other ML16258A0222016-09-19019 September 2016 Supplemental Information Needed for Acceptance of Requested Licensing Action Alkali-Silica Reaction Project stage: Acceptance Review ML16265A4402016-10-12012 October 2016 Acceptance of Requested Licensing Action Alkali-Silica Reaction Project stage: Acceptance Review SBK-L-16181, License Renewal Application Relating to the Alkali-Silica Reaction Monitoring Program2016-12-23023 December 2016 License Renewal Application Relating to the Alkali-Silica Reaction Monitoring Program Project stage: Other SBK-L-17101, Update to Reply to a Notice of Violation; EA-16-101 Corrective Action Plan2017-06-16016 June 2017 Update to Reply to a Notice of Violation; EA-16-101 Corrective Action Plan Project stage: Other ML17199T3832017-07-26026 July 2017 Site Visit Report Regarding Regulatory Audit for Alkali Silica Reaction License Amendment Request Project stage: Other ML17214A0852017-08-0404 August 2017 Request for Additional Information Regarding License Amendment Request Related to Alkali-Silica Reaction Project stage: RAI ML17283A0412017-08-24024 August 2017 Enclosure 3 - Licensee'S Presentation-Seabrook Station, License Amendment Request 16-03 ASR Structural Evaluation Methodology Project stage: Request SBK-L-17156, Response to Request for Additional Information Regarding License Amendment Request 16-03 Related to Alkali-Silica Reaction2017-10-0303 October 2017 Response to Request for Additional Information Regarding License Amendment Request 16-03 Related to Alkali-Silica Reaction Project stage: Response to RAI SBK-L-17155, Supplement 58 - Response to Request for Additional Information for the Review of the License Renewal Application - Building Deformation Analyses Related to Concrete Alkali-Silica Reaction2017-10-0303 October 2017 Supplement 58 - Response to Request for Additional Information for the Review of the License Renewal Application - Building Deformation Analyses Related to Concrete Alkali-Silica Reaction Project stage: Response to RAI ML17283A0402017-10-10010 October 2017 Enclosure 2 - Nrc'S Presentation Slides-Seabrook Station, License Amendment Request, Stage 3 Methodology Project stage: Other ML17261B2172017-10-11011 October 2017 Request for Additional Information Regarding License Amendment Request Related to Alkali-Silica Reaction (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: RAI ML17278A7482017-10-13013 October 2017 Summary of August 24, 2017, Meeting with NextEra Energy Regarding License Amendment Request on Alkali Silica Reaction (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: Meeting ML17310A1142017-10-17017 October 2017 La - (External_Sender) Name Correction: Summary of August 24, 2017, Meeting with NextEra Energy Regarding License Amendment Request on Alkali Silica Reaction (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: Meeting ML17310B5402017-11-0303 November 2017 La - (External_Sender) SBK-L-17180 Supplement 58 - Revised Alkali-Silica Reaction Aging Management Program Project stage: Request SBK-L-17180, Supplement 58, Revised Alkali-Silica Reaction Aging Management Program2017-11-0303 November 2017 Supplement 58, Revised Alkali-Silica Reaction Aging Management Program Project stage: Request ML17341A0622017-11-17017 November 2017 NextEra Energy Seabrook Presentation Slides - Seabrook Station ASR Methodology LAR: Structural Deformation - LAR 16-03, Methodology and Responses to Rais D2-D8 - for November 17, 2017, Public Meeting Project stage: Response to RAI SBK-L-17204, Response to Request for Additional Information Regarding License Amendment Request Related to Alkali-Silica Reaction (CAC No. MF8260; EPID L-2016-LLA-0007)2017-12-11011 December 2017 Response to Request for Additional Information Regarding License Amendment Request Related to Alkali-Silica Reaction (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: Response to RAI ML17340A1862017-12-14014 December 2017 Summary of November 17, 2017, Meeting with NextEra Energy Regarding License Amendment Request on Alkali Silica Reaction - Requests for Additional Information (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: RAI ML18102A0972018-04-12012 April 2018 Commission Memorandum and Order CLI-18-04 Project stage: Request SBK-L-18072, Revised Structures Monitoring Aging Management Program2018-05-18018 May 2018 Revised Structures Monitoring Aging Management Program Project stage: Request ML18135A0462018-05-21021 May 2018 Site Visit Report Regarding Regulatory Audit for License Amendment Request Alkali Silica Reaction License Amendment Request and License Renewal Alkali-Silica Reaction Aging Management Program Review (CAC No. MF8260; EPID L-2016-LLA-007) Project stage: Other SBK-L-18074, Response to Request for Additional Information Regarding License Amendment Request 16-032018-06-0707 June 2018 Response to Request for Additional Information Regarding License Amendment Request 16-03 Project stage: Response to RAI ML17088A6742018-08-17017 August 2018 Request for Withholding Information from Public Disclosure Project stage: Withholding Request Acceptance ML18271A0692018-09-28028 September 2018 Attachment 2 NRC Staff Draft Safety Evaluation (Non-Proprietary) Project stage: Request ML18226A2052018-09-28028 September 2018 Redacted, Submission of Alkali-Silica Reaction License Amendment Request Draft Safety Evaluation to Support Advisory Committee on Reactor Safeguards Review of Seabrook License Renewal (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: Draft Approval ML18348A9512018-12-14014 December 2018 License Renewal Application: Review of Licensee Program Addressing Alkali-Silica Reaction Project stage: Approval ML18353A9542018-12-19019 December 2018 Report on the Safety Aspects of the License Renewal Application for the Seabrook Station, Unit 1 Project stage: Other ML19011A3562019-01-11011 January 2019 Board Notification Project stage: Request ML19022A4002019-01-22022 January 2019 NRC Staff Board Notification Project stage: Request ML19044A7682019-02-13013 February 2019 Emergency Petition by C-10 Research and Education Foundation for Exercise of Commission'S Supervisory Authority to Reverse No Significant Hazards Determination and Immediately Suspend License Amendment and License Renewal Decisions Project stage: Other ML19042A1102019-02-13013 February 2019 Presentation Slides - 2019 Seabrook Public Meeting Project stage: Request ML19050A4602019-02-13013 February 2019 Handouts from the Public at the February 13, 2019, Seabrook ASR Public Meeting Project stage: Meeting ML19050A3202019-02-13013 February 2019 Package from Stephen B. Comley, Sr. at February 13, 2019 Seabrook Station, Unit 1, Public Meeting Project stage: Request ML19056A4772019-02-13013 February 2019 Transcript of Public Meeting on the Seabrook Alkali Silica Reaction (ASR) License Amendment Request and License Renewal Application, February 13, 2019, Pages 1-158 Project stage: Meeting ML19056A5882019-02-25025 February 2019 NRC Staff Answer to C-10's Emergency Petition Project stage: Request ML19056A5862019-02-25025 February 2019 Nextera'S Answer Opposing C-10 Emergency Petition Project stage: Request ML19046A3832019-02-26026 February 2019 Meeting Summary of February 13, 2019, Public Meeting in Hampton, New Hampshire Alkali-Silica Reaction License Amendment Request and License Renewal Application Project stage: Meeting ML19057A3832019-03-0404 March 2019 Renewal of Full-Power Operating License for Seabrook Station, Unit No. 1 Project stage: Request ML19058A2162019-03-0404 March 2019 Update to Proposed Issuance of a Final No Significant Hazards Consideration Determination and License Amendment Regarding Which a Hearing Has Been Requested (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: Other ML19015A1832019-03-11011 March 2019 Notice of Issuance of License Amendment to Facility Operating License No. NPF-86 (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: Approval ML18204A2912019-03-11011 March 2019 Issuance of Amendment No. 159 Methodology for Analysis of Seismic Category I Structures with Concrete Affected by Alkali-Silica Reaction Project stage: Approval ML18204A2422019-03-12012 March 2019 Federal Register Notice - License Amendment; Issuance (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: Other NRC-2019-0075, Federal Register Notice - License Amendment; Issuance (CAC No. MF8260; EPID L-2016-LLA-0007)2019-03-12012 March 2019 Federal Register Notice - License Amendment; Issuance (CAC No. MF8260; EPID L-2016-LLA-0007) Project stage: Other ML19205A3942019-07-24024 July 2019 NRC046 - Summary of August 24, 2017, Meeting with NextEra Energy Regarding License Amendment Request on Alkali Silica Reaction (CAC No. MF8260; EPID l-2016-lla-0007) (Oct. 13, 2017) Project stage: Meeting ML20318A0032020-11-24024 November 2020 Issuance of Revised Page for Renewed Facility Operating License Atomic Safety and Licensing Board Decisions LBP-20-09 and LBP-20-12 Project stage: Approval 2018-12-14
[Table View] |
|
---|
Category:Meeting Briefing Package/Handouts
MONTHYEARML23177A1142023-06-26026 June 2023 Annual Assessment Meeting Reactor Oversight Process 2023 ML23066A2472023-03-0707 March 2023 Presubmittal Meeting Slides for March 7, 2023, Public Meeting ML22146A3472022-02-23023 February 2022 Slides - Pre-Submittal Meeting for February 23 with Nextera Energy Seabrook, LLC Regarding Planned Submittal of License Amendment Request to Update Pressure-Temperature Limits Curves Period of Applicability ML20161A0812020-06-0303 June 2020 Annual Assessment Meeting June 3, 2020 Slides ML19050A4602019-02-13013 February 2019 Handouts from the Public at the February 13, 2019, Seabrook ASR Public Meeting ML18136A4822018-05-0202 May 2018 Annual Assessment Meeting 05-02-2018 Presentation ML17341A0622017-11-17017 November 2017 NextEra Energy Seabrook Presentation Slides - Seabrook Station ASR Methodology LAR: Structural Deformation - LAR 16-03, Methodology and Responses to Rais D2-D8 - for November 17, 2017, Public Meeting ML17278A7482017-10-13013 October 2017 Summary of August 24, 2017, Meeting with NextEra Energy Regarding License Amendment Request on Alkali Silica Reaction (CAC No. MF8260; EPID L-2016-LLA-0007) ML17283A0402017-10-10010 October 2017 Enclosure 2 - Nrc'S Presentation Slides-Seabrook Station, License Amendment Request, Stage 3 Methodology ML17283A0412017-08-24024 August 2017 Enclosure 3 - Licensee'S Presentation-Seabrook Station, License Amendment Request 16-03 ASR Structural Evaluation Methodology ML17164A2712017-06-0707 June 2017 Presentation Slides for Annual Assessment Meeting 2017 ML17129A3942017-05-0909 May 2017 Status of Safety Review of Seabrook License Renewal for May 9, 2017, Public Meeting on ASR in Seabrook LRA ML17129A3842017-05-0909 May 2017 NextEra Presentation at May 9, 2017, Public Meeting Re ASR in License Renewal ML16176A0542016-06-21021 June 2016 6/21/2016 - Seabrook Station Annual Assessment Meeting - NRC Presentation Slides (Assessment and ASR Update) ML16146A2002016-04-28028 April 2016 License Renewal Application, April 28, 2016, Public Meeting NextEra Presentation ML15176A5012015-06-18018 June 2015 Aam Attendance List for June 18, 2015 ML13357A0462013-12-23023 December 2013 Update on ASR ML13357A0412013-12-23023 December 2013 Public Meeting on Seabrook Station Testing Program ML13357A0432013-12-23023 December 2013 ASR at Seabrook Station Update on Testing Program ML14023A7212013-12-18018 December 2013 No More Fukushima Statement for NRC Public Meeting on Dec 18, 2013 ML13133A2492013-05-29029 May 2013 Slides from May 9, 2013, Meeting with NextEra Energy Seabrook, LLC on Pre-Submittal of a Fixed Incore Detector License Amendment Request ML13066A4882013-03-21021 March 2013 Summary of Meeting Held on February 21, 2013, Between the NRC and NextEra Energy Seabrook, LLS Regarding License Renewal Application, Seabrook Station ML12356A0432012-12-11011 December 2012 Safety Implications and Status of ASR Condition - Public Meeting on 12/11/2012 ML12132A3442012-05-11011 May 2012 NRC-AERB Bilateral Meeting Slide Presentation (Nro/De), Aerb, India - May 16-17, 2012 ML12131A4312012-05-10010 May 2012 Aam ROP-12 Slides-Safety Performance & Alkali-Silica Reaction - r9 Revised Format ML1204402842012-02-16016 February 2012 Public Meeting Construction Experiences - Evaluate Impact of Concrete Degradation ML12026A4592012-01-26026 January 2012 EDG Ifr ML11343A4482011-12-0909 December 2011 NextEra Drop in Meeting Summary and Slides from 11-14-2011 Meeting with Region-I ML11259A0022011-09-15015 September 2011 Meeting Slides Preliminary Site-Specific Results of the License Renewal Environmental Review for Seabrook Station. ML1116500382011-06-0808 June 2011 Aam Slides, June 8, 2011 ML1108206992011-03-22022 March 2011 3/22/11 Revised Pre-application Meeting Slides Regarding NFPA 805 License Amendment Request ML1022205712010-08-10010 August 2010 License Renewal Process Overview and Scoping Public Meeting Slides ML1013901282010-05-17017 May 2010 License Renewal Overview Presentation for Seabrook Station ML0910604982009-04-30030 April 2009 NRC Slides for Annual Assement Meeting, 4/30/09 ML0809300252008-04-0202 April 2008 NRC Slides - Seabrook Aam 2008 ML0708001192007-03-21021 March 2007 Slides, End of the Presentation, from Seabrook Station Annual Assessment Meeting for EOC 2006-07 ML0608202482006-03-23023 March 2006 NRC Slides for Public Meeting with FPL Seabrook to Discuss Cy 2005 Performance ML0603805612006-02-0606 February 2006 Meeting with FLP, Meeting Handouts, Proposed Submittal to Adopt Quality Assurance Topical Report ML0727105482005-12-16016 December 2005 Measurement Uncertainty Recapture Fple/Caldon - NRC Meeting ML0512201092005-04-22022 April 2005 Slides & Handouts from Meeting with FPL Energy Seabrook, LLC, Regarding Implementation of Technical Specification 3/4.8.1.1 ML0507302062005-03-14014 March 2005 NRC Slides for Public Meeting of Seabrook Station Annual Assessment ML0414201102004-05-20020 May 2004 Public Meeting Handouts Re Power Uprate License Amendment Request for Seabrook Station Unit No. 1 ML0406304312004-03-0303 March 2004 Powerpoint Presentation Slides for Meeting with Florida Power & Light Company Regarding Planned Power Uprate Request for Seabrook Station, Unit No. 1 ML0317404312003-06-12012 June 2003 Sign in Sheet ML0232601592002-11-14014 November 2002 Meeting Handout, Seabrook Steam Generator Tube Assessment Project 2023-06-26
[Table view] Category:Slides and Viewgraphs
MONTHYEARML23177A1142023-06-26026 June 2023 Annual Assessment Meeting Reactor Oversight Process 2023 ML23066A2472023-03-0707 March 2023 Presubmittal Meeting Slides for March 7, 2023, Public Meeting ML22130A1282022-05-10010 May 2022 Annual Assessment Meeting for Seabrook Station - NRC Presentation Slides ML22146A3472022-02-23023 February 2022 Slides - Pre-Submittal Meeting for February 23 with Nextera Energy Seabrook, LLC Regarding Planned Submittal of License Amendment Request to Update Pressure-Temperature Limits Curves Period of Applicability ML21168A1452021-06-22022 June 2021 Annual Assessment Meeting Slides ML20161A0812020-06-0303 June 2020 Annual Assessment Meeting June 3, 2020 Slides ML19042A1102019-02-13013 February 2019 Presentation Slides - 2019 Seabrook Public Meeting ML18136A4822018-05-0202 May 2018 Annual Assessment Meeting 05-02-2018 Presentation ML18086A7742018-02-21021 February 2018 LOR Program Biennial Inspection 71111.11B Exam Overlap Issues ML17341A0622017-11-17017 November 2017 NextEra Energy Seabrook Presentation Slides - Seabrook Station ASR Methodology LAR: Structural Deformation - LAR 16-03, Methodology and Responses to Rais D2-D8 - for November 17, 2017, Public Meeting ML17310B2322017-11-0707 November 2017 Presentation Slides - NextEra Energy/Fpl - GSI-191 Issue Resolution, Pre-submittal Meeting, September 20, 2017 ML17278A7482017-10-13013 October 2017 Summary of August 24, 2017, Meeting with NextEra Energy Regarding License Amendment Request on Alkali Silica Reaction (CAC No. MF8260; EPID L-2016-LLA-0007) ML17283A0402017-10-10010 October 2017 Enclosure 2 - Nrc'S Presentation Slides-Seabrook Station, License Amendment Request, Stage 3 Methodology ML17283A0412017-08-24024 August 2017 Enclosure 3 - Licensee'S Presentation-Seabrook Station, License Amendment Request 16-03 ASR Structural Evaluation Methodology ML17164A2712017-06-0707 June 2017 Presentation Slides for Annual Assessment Meeting 2017 ML16176A0542016-06-21021 June 2016 6/21/2016 - Seabrook Station Annual Assessment Meeting - NRC Presentation Slides (Assessment and ASR Update) ML16168A4122016-06-15015 June 2016 Slides for Public Meeting with NextEra Energy Regarding Seabrook Station ASR License Amendment ML16146A2002016-04-28028 April 2016 License Renewal Application, April 28, 2016, Public Meeting NextEra Presentation ML14190B0432014-07-0909 July 2014 Annual Assessment Meeting Performance Slides - June 24 2014 ML13357A0412013-12-23023 December 2013 Public Meeting on Seabrook Station Testing Program ML13357A0432013-12-23023 December 2013 ASR at Seabrook Station Update on Testing Program ML13357A0462013-12-23023 December 2013 Update on ASR ML13133A2492013-05-29029 May 2013 Slides from May 9, 2013, Meeting with NextEra Energy Seabrook, LLC on Pre-Submittal of a Fixed Incore Detector License Amendment Request ML13066A4882013-03-21021 March 2013 Summary of Meeting Held on February 21, 2013, Between the NRC and NextEra Energy Seabrook, LLS Regarding License Renewal Application, Seabrook Station ML12356A0432012-12-11011 December 2012 Safety Implications and Status of ASR Condition - Public Meeting on 12/11/2012 ML12236A3852012-08-23023 August 2012 Memo Summary of NextEra Energy Seabrook Drop in Visit and Slides, August 22, 2012 ML12132A3442012-05-11011 May 2012 NRC-AERB Bilateral Meeting Slide Presentation (Nro/De), Aerb, India - May 16-17, 2012 ML12131A4312012-05-10010 May 2012 Aam ROP-12 Slides-Safety Performance & Alkali-Silica Reaction - r9 Revised Format ML1211604142012-04-23023 April 2012 Structural Assessment of Seabrook Station - Role of Concrete Material Testing ML1204402842012-02-16016 February 2012 Public Meeting Construction Experiences - Evaluate Impact of Concrete Degradation ML12026A4592012-01-26026 January 2012 EDG Ifr ML11343A4482011-12-0909 December 2011 NextEra Drop in Meeting Summary and Slides from 11-14-2011 Meeting with Region-I SBK-L-11190, Supplement to Request for Closed Meeting to Discuss Proprietary Test2011-09-19019 September 2011 Supplement to Request for Closed Meeting to Discuss Proprietary Test ML11259A0022011-09-15015 September 2011 Meeting Slides Preliminary Site-Specific Results of the License Renewal Environmental Review for Seabrook Station. ML1116500382011-06-0808 June 2011 Aam Slides, June 8, 2011 ML12054A6412011-05-24024 May 2011 Concrete Degradation - Alkali Silica Reaction, W/Handwritten Notes ML1108206992011-03-22022 March 2011 3/22/11 Revised Pre-application Meeting Slides Regarding NFPA 805 License Amendment Request ML1022205712010-08-10010 August 2010 License Renewal Process Overview and Scoping Public Meeting Slides ML1019703702010-07-19019 July 2010 License Renewal Process Overview ML1013901282010-05-17017 May 2010 License Renewal Overview Presentation for Seabrook Station ML1011004582010-04-20020 April 2010 NRC Slides for Seabrook Annual Assessment Meeting, April 14, 2010 ML0927403042009-09-22022 September 2009 NextEra Letter and Slide Presentation to NRC Seabrook Regulatory Conference, Dated 9/22/09 ML0910604982009-04-30030 April 2009 NRC Slides for Annual Assement Meeting, 4/30/09 ML0809300252008-04-0202 April 2008 NRC Slides - Seabrook Aam 2008 ML0710002082007-03-29029 March 2007 Aam Slides for EOC 2006-07 ML0708001192007-03-21021 March 2007 Slides, End of the Presentation, from Seabrook Station Annual Assessment Meeting for EOC 2006-07 ML0727105992006-06-0505 June 2006 Viewgraphs of Use of Ultrasonic Flow Measurement to Determine Reactor Power ML0727106062006-06-0505 June 2006 Viewgraphs of Use of Ultrasonic Flow Measurement to Determine Reactor Power ML0608202482006-03-23023 March 2006 NRC Slides for Public Meeting with FPL Seabrook to Discuss Cy 2005 Performance ML0601300312005-12-16016 December 2005 Meeting Slides, Measurement Uncertainty Recapture Fple/Caldon - NRC Meeting December 16, 2005 2023-06-26
[Table view] |
Text
Seabrook Station ASR Methodology LAR:
Structural Deformation LAR 16-03 Methodology and Responses to RAIs D2-D8 November 17, 2017
The foundation for everything we do are the Values and Core Principles of our Nuclear Excellence Model 2
- Ken Browne Licensing Manager
- Jeff Sobotka Design Engineering Manager
- Ed Carley Engineering Supervisor
- Jaclyn Hulbert Engineer - ASR Program Owner
- Simpson Gumpertz and Heger
- Dr. Said Bolourchi Senior Principal
- Dr. Andrew Sarawit Senior Project Manager
- John Simons General Manager 3
Overview of Methodology Document
- Analysis and evaluation approach for all Seismic Category I structures and all stages.
- Sufficient details provided for consistent application and repeatability for all three stages of analyses.
- Acceptance based on meeting the Codes of record as supplemented.
- Supplements to the Codes with justifications.
- Monitoring parameters and threshold limits.
- Actions when ASR deformations approach limits.
- Allows knowledgeable structural engineers to implement methodology in a consistent and repeatable manner.
4
ASR Evaluation Process License Amendment Request
- Stage 1, 2, and 3 analyses
- Repeatable process for Stage 1, 2, Methodology Document and 3 analyses Structural Analysis &
- Demand calculations Evaluation
- Establish design margin for potential Threshold Limits future ASR expansion Structures Monitoring
- Monitoring parameters and frequency Program
- Action if approaching threshold limits 5
Contents of Methodology Document
- Characteristics and Measurement of ASR
- Loads and Load Combinations
- ASR Threshold Limits and Monitoring
- Evaluation for Approaching Threshold limits 6
Loads and Load Combinations
- Loads and factored load combinations are
- as defined in the current UFSAR and
- supplemented by LAR 16-03 to include ASR loads and load factors.
- ASR load factors provide safety margins consistent with the original codes of record.
7
Stage Three Evaluation Process Sustained Field Measurements FEA Model Field Observations Loads Correlation of Analysis to Field Observations Cracking Concrete Backfill Pressure Moment Redistribution Factored Loads
- Stiffness reduction due to ASR
- Limit to ACI 318-71 8.6 expansion of unreinforced backfill
- Is cracking limit exceeded?
- Backfill pressure reduction:
- No structural cracks/distress
- Stiffness reduction due to
- Overburden pressure axial, shear, and/or flexural
- Confinement strength reduction cracking.
Acceptance Criteria Demand-to-Capacity Supplement to ACI 318-71 Ratio Threshold Parameters & Limits Evaluation
- Consideration of ASR loads
- Shear-friction capacity for members measurements subjected to net compression Structures Monitoring
- Distribution of ASR Program
- Structural deformation measurements
- Acceptable reduction in flexural stiffness
- Stiffness reduction due to axial and shear cracking 8
Methodology Document Summary
- Provides detailed analysis approach for all stages of analyses described in the LAR 16-03.
- Allows knowledgeable structural engineers to implement methodology in a consistent and repeatable manner.
9
RAI-D2 Request - Provide a detailed explanation of how the Stage 3 analysis methods will be implemented in a consistent, repeatable manner. Identify deviations from the design code of record.
Response
- Methodology Document establishes an approach to perform a Stage 3 analysis in a consistent, repeatable manner.
- Supplements to the codes of record
- Supplement 1 - Consideration of ASR loads
- Supplement 2 - Code acceptance criteria
- Supplement 3 - Shear-friction capacity for members subjected to net compression
- Supplement 4 - Flexural cracked section properties
- Supplement 5 - Axial and shear cracked section properties
- UFSAR markup will be revised to reflect these supplements 10
RAI-D3 Request - Explain with sufficient technical detail how the proposed moment redistribution approach meets specific requirements of ACI 318-71.
Response
- The Methodology Document limits the use of moment redistribution for all structures to be in accordance with ACI 318-71 Section 8.6.
- The CEB evaluation is being revised in accordance with the Methodology Document.
- Eliminate the use of moment redistribution.
- Consider cracked section properties.
11
RAI-D4 Request - Explain with sufficient technical detail how the "simplified moment redistribution" method is applied.
Response
- As discussed in response to RAI-D3 moment redistribution will be limited to ACI 318-71 section 8.6.
- The CEB evaluation is being revised without the use of moment redistribution methods. Appendix L of the CEB Evaluation will be superseded. The same structural model and boundary conditions were used in previous analysis.
12
RAI-D5 (a)
Request - Clarify what the threshold factor represents in Stage 3 analyses and how the factor will be determined for future analyses.
Response
- Threshold factor is design margin expressed as the amount ASR loads can increase and still meet ACI criteria.
- Threshold factor is an output of the evaluation, not an input to the methodology.
- A unique threshold factor is calculated for each building based on the available margin.
- Used to establish threshold limits for monitored parameters.
- This margin is available to account for potential future ASR expansion without reducing the code inherent margin of safety.
- Threshold factor may be revised based on further analysis, by using additional inspection and measurement data, and/or using a more refined structural analysis method without reducing the code inherent margin of safety.
13
RAI-D5(b)
Request - Explain if there is a limit imposed on the extent of analysis that can be used to modify the demands upon a structure and if this impacts the specification of the threshold factor.
Response
- Threshold factor is an output of an evaluation (see RAI-D5(a)).
- There is no limit on re-evaluation provided evaluation satisfies ACI Code as supplemented.
- Moment redistribution is limited per ACI Code.
- Re-evaluations would use additional inspection and measurement data, and/or use a more refined structural analysis method in accordance with the Methodology Document.
- Structural modification may be required to reestablish margin.
14
RAI-D6 Request - Clarify whether the 100-40-40 method will be implemented in equivalent static analyses for ASR-affected structures.
If so, provide the technical basis for using the method in conjunction with equivalent static analysis.
Response
- The 100-40-40 method will be deleted from the proposed methodology
- The CEB evaluation is being revised to use the square-root- of-the-sum of-the-squares (SRSS) method in conjunction with the equivalent static analysis method consistent with the original design calculation approach.
- UFSAR markups will be revised to remove references to 100-40-40.
15
RAI-D7(a)
Request - Provide an explanation of how multiple load components (e.g., axial force and moment) are combined to perform code interaction checks.
Response
- The Methodology Document only allows the use of SRSS method for calculation of seismic demands.
- The CEB evaluation is being revised without the use of the 100-40-40 method.
- For conditions with multiple components (e.g., axial force and moment P-M interaction), the Methodology Document requires
- All components are calculated by the SRSS method.
- The SRSS calculated +/-P and +/-M will be used for P-M interaction evaluation.
16
RAI-D7(b)
Request - Explain why the combination of EO, and He in some cases is less than EO, alone. If the explanation assumes a phase relationship between EO, and He, provide the technical basis for the assumed phase relationship.
Response
- For the CEB calculation, the seismic inertia force, EO, and soil pushing the embedded part of the CEB, He, are modeled in-phase.
- In-phase modeling maximizes base shear and overturning moment when the static equivalent method and the SRSS responses are used.
- The out-of-plane bending response in CEB is influenced by the presence of large penetrations, and location of applied loads including dynamic soil loads. The dynamic soil response and inertial response may counteract each other at limited small locations.
- Analyses consider seismic motion in opposite directions. Results at each location are enveloped, therefore the localized areas are covered.
17
RAI-D8 Request - Explain, with sufficient technical detail, how the proposed method of evaluation for ASR-affected structures verifies that the stresses and strains in the concrete and reinforcement remain within elastic limits based on realistic behavior under normal operating (service) load conditions, including ASR load.
Response
- Compliance with the ACI Code, as supplemented by the Methodology Document, ensures structures behave elastically, and the rebar and concrete stresses and strains remain within acceptable limits.
18
RAI-D8 Response (continued)
- Performed two parametric studies to examine rebar stresses.
- Scope
- 1. Effect of increasing ASR expansion for member subjected to external load.
- 2. Impact of increasing load on ASR-affected member.
- Preliminary results for discussion Rebar stresses remain in elastic range for normal operating (service) loads.
- Assessed rebar stresses for Seabrook structures.
- Scope Structures evaluated to date
- Preliminary results for discussion Stresses and strains in the Seabrook structures are shown to be within elastic limits under normal operating load conditions (unfactored loads) when ASR loads are considered.
19
Parametric Study 1- Stress in tension rebar of typical 2 ft thick member subjected to P-M and increasing ASR strain P-M Combinations Cases
-800 Case A
-600 Case B Case G Axial force (kip/ft)
-400 Case H Case C
-200 Case I Case J 0
Case K Case D Case L 200 Case E Case F 400
-400 -300 -200 -100 0 100 200 300 400 Moment (kip-ft/ft)
P-M interaction Ultimate strength Preliminary Resultsverification pending.
Service stress 20
Parametric Study 1 - Stress in tension rebar of typical 2 ft thick member subjected to P-M and increasing ASR strain 70 70 fy =60ksi fy =60ksi 60 60 Rebar1stress(ksi) Rebar1stress(ksi) 50 50 40 40 30 30 20 20 10 10 0 0 0 0.5 1 1.5 2 2.5 0 0.5 1 1.5 2 2.5
-10 -10 Internal ASR (mm/m) Internal ASR (mm/m)
Case A Case B Case G Case H Case C Case D Case I Case J Case E Case F Case K Case L Internal ASR only Internal ASR only Factored load Preliminary Resultsverification pending. Service load
- The tensile stress in the rebar increases after ASR expansion is sufficient to close structural cracks around the tensile rebar.
- For sections with already high levels of external load (factored level loads), high levels of ASR are needed to cause additional tensile stress in rebar.
21
Parametric Study 2 - Stress in tension rebar of typical 2 ft thick ASR-affected member with increasing moment
- Self-straining concrete compressive stress 60 effect will unload before rebar tensile stress Rebar 1 stress (ksi) increases. This is because the concrete section is much stiffer than the steel based 40 on the reinforcement ratio.
20
- Stresses and strains in steel rebar are less than the elastic limits at service load 0 conditions, provided that ASR strain is less 0 20 40 60 than steel yield strain (2 mm/m).
-20 Moment (kip-ft/ft) 0 mm/m 0.5 mm/m 1 mm/m 1.5 mm/m 2 mm/m Mn 60% Mn Preliminary Resultsverification pending.
22
Stresses in Seabrook Structure due to Service Load
- The stresses for the structures that are completed or being completed have been calculated for the following two service load conditions:
- in situ condition: D + L + E + To + Sa
- in situ condition plus operating basis earthquake and potential future ASR expansion up to threshold limit: D + L + E + To + Eo + He + FTHR*Sa
- For the above realistic unfactored service load combinations, stresses in rebar are below yield, and concrete strains are less than 0.001 and are less than the 0.003 ACI Code maximum usable strain for concrete compression 23
Maximum steel rebar tensile stress and concrete compressive stress for in situ condition: D + L + E + To + Sa Analysis Maximum Maximum ASR Maximum tensile Structure Component compressive stress compressive strain Stage (mm/m) stress in rebar (ksi) in concrete (ksi) in concrete CRMAI 3 0.99 Base Mat 27.8 -0.28 -0.00009 East RHR 3 0.75 exterior wall 47.0 -1.8 -0.00058 CSTE 2 0.43 Tank wall 16.0 -0.66 -0.00018 East wing CEHMS 1 0.72 wall 31.3 -0.78 -0.00025 CEVA 1 0.31 Base slab 32.8 -0.88 -0.00028 Wall between Mech.
CEB 3 0.60 & Elec. Penetration 24.6 -2.19 -0.00065 WPC/PH 2 0.24 North wall 6.5 -0.49 -0.00016 EMH 1 0.25 W13/W15 walls 7.3 -0.03 -0.00001 Preliminary Resultsverification pending.
24
Maximum steel rebar tensile stress and concrete compressive stress for in situ condition plus operating basis earthquake and future ASR expansion up to threshold limit:
D + L + E + To + Eo + He + FTHR*Sa Analysis Maximum Maximum ASR Maximum tensile Structure Component compressive stress compressive strain Stage (mm/m) stress in rebar (ksi) in concrete (ksi) in concrete CRMAI 3 0.99 x 1.4 Base Mat 39.1 -0.37 -0.00012 RHR East 3 0.75 x 1.2 exterior wall 56.5 -2.1 -0.00067 CSTE 2 0.43 x 1.6 Tank wall 26.7 -1.11 -0.00031 CEHMS East wing 1 0.72 x 1.5 wall 41.6 -1.52 -0.00049 CEVA 1 0.31 x 3.0 Base slab 44.0 -1.08 -0.00035 CEB Wall between Mech.
3 0.60 x 1.3 & Elec. Penetration 44.0 -2.8 -0.00091 WPC/PH 2 0.24 x 1.8 North wall 23.2 -0.85 -0.00027 EMH 1 0.25 x 3.7 W13/W15 walls 26.8 -0.11 -0.00004 Preliminary Resultsverification pending.
25
Summary
- The Methodology Document provides the approach for performing all three stages of analyses described in the LAR can be implemented in a consistent and repeatable manner by a knowledgeable structural engineer.
- Use of moment redistribution for structures will be in accordance with ACI 318-71 Section 8.6.
- The 100-40-40 method will not be considered for calculating seismic demands for any Seismic Category I structures at Seabrook. The UFSAR markup will be revised to use the original SRSS methods.
- Compliance with the ACI Code, as supplemented by the Methodology Document, ensures structures behave elastically, and the rebar and concrete stresses and strains remain within acceptable limits.
26
Building Deformation Analyses (1 of 2)
Structure Schedule Percent Complete Incorporated to SMP Condensate water storage tank Complete 100% Complete Complete Containment enclosure building (revision) 4Q2017 80%
Containment enclosure ventilation area Complete 100% Complete Containment structure Complete 100% Complete Equipment hatch missile shield Complete 100% Complete Control room make-up air intake Complete 100% Complete Electrical cable tunnels Complete 100% Complete Pre-action valve building 4Q2017 80% 2/2018 RHR equipment vault Complete 100% Complete Containment internal structures 4Q2017 90% 2/2018 Main steam and feed water east pipe chase 4Q2017 70% 2/2018 Hydrogen recombiner structure Stage 1 Safety-related electrical duct banks and 1Q2018 80% 4/2018 manholes Stages 2 and 3 Safety-related electrical duct 1Q2018 40% 4/2018 banks and manholes Emergency feedwater pump building 1Q2018 50% 4/2018 Fuel storage building 4Q2017 80% 2/2018 Structures that are/expected to be Stage 3 27
Building Deformation Analyses (2 of 2)
Structure Schedule Percent Complete Incorporated to SMP Control Building 1Q2018 30% 4/2018 Diesel Generator Building Mechanical Penetration 1Q2018 40% 4/2018 Personnel hatch area Main steam and feed water west pipe chase 4Q2017 90% 2/2018 Primary auxiliary building 4Q2017 30% 2/2018 Service water cooling tower incl. switchgear 1Q2018 4/2018 rooms Service water access (inspection) vault 1Q2018 4/2018 Circulating water pumphouse (below el. 21')
2Q2018 7/2018 Service water pumphouse Piping (RCA) Tunnels 2Q2018 7/2018 Tank farm area 2Q2018 7/2018 Waste processing building 2Q2018 7/2018 Structures that are/expected to be Stage 3 28
Questions?
29