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| | number = ML12332A179 | | | number = ML12332A179 |
| | issue date = 11/26/2012 | | | issue date = 11/26/2012 |
| | title = Arkansas Nuclear One, Unit 2 - Power Point Presentation by Entergy at the November 26, 2012 Meeting (TAC No. ME9706.) | | | title = Power Point Presentation by Entergy at the November 26, 2012 Meeting (TAC No. ME9706.) |
| | author name = Bice D B | | | author name = Bice D |
| | author affiliation = Entergy Operations, Inc | | | author affiliation = Entergy Operations, Inc |
| | addressee name = Kalyanam N K | | | addressee name = Kalyanam N |
| | addressee affiliation = NRC/NRR/DORL/LPLIV | | | addressee affiliation = NRC/NRR/DORL/LPLIV |
| | docket = 05000368 | | | docket = 05000368 |
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| =Text= | | =Text= |
| {{#Wiki_filter:ANO-2 NFPA 805 ApplicationNRC Public Meeting -November 26, 2012In advance of the AN O-2 re-submittal of its NFPA 805 application and as a follow-up to a public meeting held on October 9, 2012, Entergy requested an additional public meeting with the NRC in order to ensuregapswhichresultedinnon | | {{#Wiki_filter:ANO-2 NFPA 805 Application NRC Public Meeting - November 26, 2012 In advance of the ANO-2 re-submittal of its NFPA 805 application and as a follow-up to a public meeting held on October 9, 2012, Entergy requested an additional public meeting with the NRC in order to ensure gaps which resulted in non-acceptance non acceptance of the previous ANO ANO-2 2 License Amendment Request (LAR) will be resolved appropriately. |
| -acceptanceofthepreviousANO
| | Agenda |
| -2 ensure gaps which resulted in non acceptance of the previous ANO 2 License Amendment Request (LAR) will be resolved appropriately.
| | : 1. Entergys proposed resolution to each of the previously identified gaps 2 |
| Agenda1.Entergy's proposed resolution to each of the previously identified gaps 2Opendiscussion(followingeachresolutionpresentation) 2.Open discussion (following each resolution presentation)
| | : 2. Open discussion (following each resolution presentation) |
| ANO-2 NFPA 805 Application*Variances from Deterministic Re q uirements (VFDRs) have been Issue #1 -Transition Riskq()identified and mapped to the respective probabilistic risk analysis (PRA) modeled equipment in order to determine the compliant case core damage frequency (CDF) and large early release frequency (LERF) for all scenarios in Fire Area G (including control room non-abandonment scenarios)
| |
| *TheVFDRsaddressthefollowingSafetyFunctions:
| |
| The VFDRs address the following Safety Functions:-Reactor Coolant System Pressure Control-Inventory-Decay Heat Removal
| |
| -Vital Auxiliaries -Electrical
| |
|
| |
|
| -VitalAuxiliaries
| | ANO-2 NFPA 805 Application Issue #1 - Transition Risk |
| -ServiceWaterVital Auxiliaries Service Water-Vital Auxiliaries -Heating, Ventilation, and Air Conditioning ANO-2 NFPA 805 ApplicationIssue #1 -Transition Risk (continued)*The Variant Case was calculated for these same scenarios by failing the equipment affected by fire and crediting a new Auxiliary Fdt(AFW)difitihihititdb (continued)
| | * Variances from Deterministic Requirements q ((VFDRs)) have been identified and mapped to the respective probabilistic risk analysis (PRA) modeled equipment in order to determine the compliant case core damage frequency (CDF) and large early release frequency (LERF) for all scenarios in Fire Area G (including control room non-abandonment scenarios) |
| F ee d wa t er (AFW) pump mo difi ca ti on w hi c h i s no t i mpac t e d b y a fire in Fire Area G*The Com pliant Case was calculated b y settin g the e q ui p ment pygqpcredited for shutdown for a fire in Fire Area G to its random failure probability; no credit was taken for the new AFW pump
| | * The VFDRs address the following Safety Functions: |
| *DeltariskresultsfortheControlRoomAnalysis(resultshavenot
| | - Reactor Coolant System Pressure Control |
| *Delta risk results for the Control Room Analysis (results have not yet been certified):-CDF -(-7.40E-05/yr)-LERF -(-2.68E-06/yr) | | - Inventory |
| ANO-2 NFPA 805 ApplicationIssue #1 -Transition Risk (continued)(continued)
| | - Decay Heat Removal |
| OPEN DISCUSSION ANO-2 NFPA 805 ApplicationIssue #2 -Sensitivity Analysis on the use of UnapprovedMethods Unapproved Methods Ufdthd(iltillftdl
| | - Vital Auxiliaries - Electrical |
| *U se o f unapprove d me th o d s (i.e. e l ec t r i ca l pane l f ac t ors an d l ong term manual non-suppression probabilities) have been removed
| | - Vital Auxiliaries - Service Water |
| | - Vital Auxiliaries - Heating, Ventilation, and Air Conditioning |
|
| |
|
| and replaced with approved methodologies*Detailed fire modeling has been performed on the affected areas*Use of new ignition frequencies from FAQ 08-0048 "Fire Ignition Frequency"wereapplied Frequency were applied ANO-2 NFPA 805 ApplicationIssue #2 -Sensitivity Analysis on the use of Unapproved Methods (continued)*The Sensitivity Analysis addresses:MltiCttAli/HtGL(MCA/HGL)ili | | ANO-2 NFPA 805 Application Issue #1 - Transition Risk (continued) |
| -M u lti-C ompar t men t A na l ys i s / H o t G as L ayer (MCA/HGL) screen i ng ana l ys i s-Calculates new CDF/LERF values | | * The Variant Case was calculated for these same scenarios by failing the equipment affected by fire and crediting a new Auxiliary F d t (AFW) pump modification Feedwater difi ti which hi h is i nott impacted i t d by b a fire in Fire Area G |
| -Calculates new delta CDF/LERF values*Focused Scope Peer Review is near completion | | * The Compliant p Case was calculated by y setting g the equipment q p credited for shutdown for a fire in Fire Area G to its random failure probability; no credit was taken for the new AFW pump |
| *ResultsoftheSensitivityAnalysis(resultshavenotyetbeencertified): | | * Delta risk results for the Control Room Analysis (results have not yet been certified): |
| Results of the Sensitivity Analysis (results have not yet been certified):-New CDF -5.10E-05/yr (Fire CDF only, excludes internal events and other external events) | | - CDF - (-7.40E-05/yr) |
| *PreviouslysubmittedCDF | | - LERF - (-2.68E-06/yr) |
| -64E-05/yr(FireCDFonly)-New LERF -1.08E-06/yr (Fire LERF only) | | |
| Previously submitted CDF 6.4E 05/yr (Fire CDF only)*Previously submitted LERF -1.4E-06/yr (Fire LERF only)
| | ANO-2 NFPA 805 Application Issue #1 - Transition Risk (continued) |
| ANO-2 NFPA 805 ApplicationIssue #2 -Sensitivity Analysis on the use of Unapproved Methods (continued)*Results of the Sensitivity Analysis (continued):-New Delta CDF -(-4.28E-04/yr)-New Delta LERF -(-1.26E-05/yr)-MCA/HGL Analysis*New Scenarios with a larger zone of influence were developed and quantified after not screening-2109-U-B/C/D/E/F/G-2154-E*Sensitivity Analysis will become the Model of Record after submittal and prior to transition to NFPA-805 is complete ANO-2 NFPA 805 ApplicationIssue #2 -Sensitivity Analysis on the use of Unapproved Methods (continued) | | OPEN DISCUSSION |
| OPEN DISCUSSION ANO-2 NFPA 805 ApplicationIssue #3 -New Results could precipitate furtherchangestotheplantorPRA further changes to the plant or PRA *Two new Modifications proposed:-Incipient detection for Panel 2C75 in 2154-E (Fire Area B-4)-The Reactor Coolant System (RCS) head vent valves to preclude spuriousoperationinFireArea2199 | | |
| -G(FireAreaG) spurious operation in Fire Area 2199 G (Fire Area G)*No new Recoveries were identified*No other changes to the Fire PRA model are anticipated ANO-2 NFPA 805 ApplicationIssue #3 -New Results could precipitate furtherchangestotheplantorPRA (continued) further changes to the plant or PRA OPEN DISCUSSION}}
| | ANO-2 NFPA 805 Application Issue #2 - Sensitivity Analysis on the use of Unapproved Methods |
| | * U Use off unapprovedd methods th d (i (i.e. electrical l t i l panell ffactors t and d llong term manual non-suppression probabilities) have been removed and replaced with approved methodologies |
| | * Detailed fire modeling has been performed on the affected areas |
| | * Use of new ignition frequencies from FAQ 08-0048 Fire Ignition Frequency were applied Frequency |
| | |
| | ANO-2 NFPA 805 Application Issue #2 - Sensitivity Analysis on the use of Unapproved Methods (continued) |
| | * The Sensitivity Analysis addresses: |
| | - Multi-Compartment M lti C t t Analysis A l i / HotH tG Gas Layer L (MCA/HGL) screening i analysis l i |
| | - Calculates new CDF/LERF values |
| | - Calculates new delta CDF/LERF values |
| | * Focused Scope Peer Review is near completion |
| | * Results of the Sensitivity Analysis (results have not yet been certified): |
| | - New CDF - 5.10E-05/yr (Fire CDF only, excludes internal events and other external events) |
| | * Previously submitted CDF - 6.4E 6 4E-05/yr 05/yr (Fire CDF only) |
| | - New LERF - 1.08E-06/yr (Fire LERF only) |
| | * Previously submitted LERF - 1.4E-06/yr (Fire LERF only) |
| | |
| | ANO-2 NFPA 805 Application Issue #2 - Sensitivity Analysis on the use of Unapproved Methods (continued) |
| | * Results of the Sensitivity Analysis (continued): |
| | - New Delta CDF - (-4.28E-04/yr) |
| | - New Delta LERF - (-1.26E-05/yr) |
| | - MCA/HGL Analysis |
| | * New Scenarios with a larger zone of influence were developed and quantified after not screening |
| | - 2109-U-B/C/D/E/F/G |
| | - 2154-E |
| | * Sensitivity Analysis will become the Model of Record after submittal and prior to transition to NFPA-805 is complete |
| | |
| | ANO-2 NFPA 805 Application Issue #2 - Sensitivity Analysis on the use of Unapproved Methods (continued) |
| | OPEN DISCUSSION |
| | |
| | ANO-2 NFPA 805 Application Issue #3 - New Results could precipitate further changes to the plant or PRA |
| | * Two new Modifications proposed: |
| | - Incipient detection for Panel 2C75 in 2154-E (Fire Area B-4) |
| | - The Reactor Coolant System (RCS) head vent valves to preclude spurious operation in Fire Area 2199-G 2199 G (Fire Area G) |
| | * No new Recoveries were identified |
| | * No other changes to the Fire PRA model are anticipated |
| | |
| | ANO-2 NFPA 805 Application Issue #3 - New Results could precipitate further changes to the plant or PRA (continued) |
| | OPEN DISCUSSION}} |
Letter Sequence Meeting |
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MONTHYEARML12278A2552012-10-0909 October 2012 Licensee Slide Presentation, ANO-2 NFPA 805 Application, at the October 9, 2012, pre-submittal Meeting to Discuss the NFPA 805 Application Project stage: Meeting ML12278A2532012-10-0909 October 2012 Licensee Handout, Design Input for Fire Risk Evaluation, at the 10/9/2012 Pre-submittal Meeting to Discuss the NFPA 805 Application Project stage: Meeting ML12324A4222012-11-14014 November 2012 Meeting Notice with Entergy Operations, Inc. to Discuss the Status of the Revised Application for Arkansas Nuclear One, Unit 2 to Transition to National Fire Protection Association (NFPA) Standard 805 Project stage: Meeting ML12319A1222012-11-14014 November 2012 Notice of Forthcoming Meeting with Entergy Operations, Inc. to Discuss Resubmittal of License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 805 at Arkansas Nuclear One, Unit 2 Project stage: Meeting ML12332A1772012-11-19019 November 2012 Email Power Point Presentation by Entergy at the November 26, 2012 Meeting (TAC No. ME97060) Project stage: Meeting ML12332A1792012-11-26026 November 2012 Power Point Presentation by Entergy at the November 26, 2012 Meeting (TAC No. ME9706.) Project stage: Meeting 2012-11-14
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Category:Meeting Briefing Package/Handouts
MONTHYEARML24264A1592024-09-30030 September 2024 Adtf Exemption Request Pre-submittal Meeting Presentation ML24190A1452024-07-0808 July 2024 Public Meeting Slides for Arkansas Nuclear One 2023 Annual Assessment, Pope County Quorum Court ML23348A3572023-12-14014 December 2023 Application to Revise Technical Specifications to Use Online Monitoring Methodology – Slides and Affidavit for Pre-Submittal Meeting ML23296A1002023-10-24024 October 2023 Entergy Presentation Slides for Pre-Submittal Meeting on 10/24/23, Mtc LAR ML22193A0262022-07-12012 July 2022 (ANO) RICT License Amendment Request TSTF-505 NRC Pre-Submittal Meeting Presentation - July 13, 2022 ML21351A0282021-12-16016 December 2021 Preliminary Information of ANO-1 1R17 (2002) Findings on CRDM Nozzle 56, and Presentation Slides for PT Exam of Nozzle 56 ML21348A1262021-12-14014 December 2021 RCP TS LAR Pre-Submittal Meeting Slides, December 16, 2021 ML21312A0342021-11-0909 November 2021 Combined Slides for November 9, 2021, Technology Inclusive Content of Application Project Public Meeting ML21309A0622021-11-0909 November 2021 NRC Slides for November 9, 2021, Technology Inclusive Content of Application Project Public Meeting ML21242A2792021-08-30030 August 2021 ANO Slides Presentation for 9-1-21 Public Meeting ML21200A1792021-07-31031 July 2021 Scale/Melcor Non-LWR Source Term Demonstration Project - High Temperature Gas-Cooled Reactor ML20344A0572020-12-10010 December 2020 Combined Industry and NRC Slides for the December 10, 2020, Public Meeting on Technology Inclusive Content of Application Project, Advanced Reactor Content of Application Project and Applicability of Regulations to Non-Light Water Reactors ML20315A1582020-11-17017 November 2020 Presentation Meeting Slides for the 11/17/20 Teleconference ML20269A3452020-09-28028 September 2020 Pre-submittal Meeting for Request for One-Time Exemption from 10 CFR Part 50, Appendix E, Biennial EP Exercise (Offsite) Due to COVID-19- Entergy Presentation Slides ML20255A0242020-09-11011 September 2020 (Ano), Pre-Submittal Meeting with NRC - Request to Extend Allowable Outage Time (AOT) for the Emergency Cooling Pond (ECP) ML20211L7052020-08-0404 August 2020 (ANO) Units 1 & 2, Pre-Submittal Slide Presentation for August 4, 2020 Public Meeting ML20114E2752020-04-29029 April 2020 (ANO) Carbon Fiber Reinforced Polymer (Cfrp) Relief Request Pre-Submittal Meeting with NRC - April 29, 2020 ML19136A2512019-06-13013 June 2019 Handout for the June 13, 2019 Pre-submittal Public Meeting for Planned License Amendment Request Regarding Fuel Handling Accident Analysis ML18176A1312018-06-21021 June 2018 Summary of Annual Assessment Meeting with Entergy Operations, Inc., Regarding 2017 Performance of Arkansas Nuclear One ML18107A3342018-04-10010 April 2018 Tech Spec 3.3.5.2a Change Pre-Submittal Meeting Presentation Slides ML18081A1922018-03-20020 March 2018 Presentation at the PRA Workshop ML17328A3652017-11-30030 November 2017 Workshop on Sharing Operating Experience from Rigging, Lifting and Load Handling Events - Temporary Overhead Crane Failure at Arkansas Nuclear One Presented to IAEA ML16109A3642016-04-18018 April 2016 Summary of Meeting to Discuss Supplemental Inspection Results and Annual Assessment Meeting with Entergy Operations Inc. Regarding 2015 Performance of Arkansas Nuclear One ML16015A0622016-01-20020 January 2016 Briefing Notes for 95003 Inspection at Arkansas Nuclear One ML15132A1752015-05-21021 May 2015 Summary of Annual Assessment Meeting with Entergy Operations Inc., Regarding ANO 2014 Performance ML14356A1852014-12-22022 December 2014 ANO2 Exit ML14329B2092014-11-25025 November 2014 Summary of Regulatory Conference to Discuss Safety Significance of Arkansas Nuclear One Flood Protection Deficiencies ML14259A5972014-09-16016 September 2014 Summary of Annual Performance Assessment Meeting for Arkansas Nuclear One Performance ML14169A0722014-06-19019 June 2014 Entergy Public Meeting Presentation Slides ML12332A1792012-11-26026 November 2012 Power Point Presentation by Entergy at the November 26, 2012 Meeting (TAC No. ME9706.) ML12306A2912012-11-0101 November 2012 Transmittal Email and WCAP-17128-NP, Revision 1, Flaw Evaluation of CE Design RCP Suction and Discharge Nozzle Dissimilar Metal Welds, Phase III Study, May 2010 ML12278A2552012-10-0909 October 2012 Licensee Slide Presentation, ANO-2 NFPA 805 Application, at the October 9, 2012, pre-submittal Meeting to Discuss the NFPA 805 Application ML12278A2532012-10-0909 October 2012 Licensee Handout, Design Input for Fire Risk Evaluation, at the 10/9/2012 Pre-submittal Meeting to Discuss the NFPA 805 Application ML12275A5492012-10-0101 October 2012 Summary of Meeting with Entergy Operations, Inc., to Discuss the Performance of the Subject Facilities, Recent Organizational Changes, and Current Regulatory Issues ML1218003412012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Item #4 ML1218003192012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Item #3 ML1218003122012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Item #2, Table W-2 ANO-2 Fire Area Risk Summary ML1218003102012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Item #1, Plant Modifications and Items to Be Completed ML1218003062012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Power Point Slides ML12166A5602012-06-12012 June 2012 Licensee Presentation on June 12 & 13, 2012, Meeting License Amendment Request on NFPA 805 Adoption ML1202501112012-01-25025 January 2012 Licensee Slides Arkansas Nuclear One, Unit 1 - Steam Generators Tube to Tube Wear ML1126502692011-09-22022 September 2011 Licensee Handouts for 10/05/2011 Presubmittal Meeting ML1117906392011-06-28028 June 2011 Summary of Meeting with Entergy Operations Inc ML1110401532011-04-13013 April 2011 Licensee Slides from 4/13/11 Meeting with Entergy Operations, Inc., to Discuss Proposed National Fire Protection Programs Standards 805 License Amendment Submittal for Arkansas Nuclear One, Units 1 & 2 ML1107504262011-03-15015 March 2011 Licensee Slides from 3/15/11 Pre-Sumittal Meeting SWS Room Cooling Required Action ML1107504162011-03-15015 March 2011 Licensee Slides from 3/15/11 Meeting with Entergy Operations on Technical Specification Change - Testing of Idle RCS Cooling Loop ML1016705012010-06-17017 June 2010 Discussion of Screening Criteria - Arkansas Nuclear One (ANO) ML0935201272009-12-18018 December 2009 Nrc/Entergy Operations, Inc., Management Meeting ML0935005652009-12-15015 December 2009 NRC Handouts Current Status of Arkansas Nuclear One Unit Steam Generators, December 2009 ML0913104172009-05-11011 May 2009 Summary of Meeting with Entergy to Discuss Arkansas Nuclear One 2008 Performance 2024-09-30
[Table view] Category:Slides and Viewgraphs
MONTHYEARML24264A1592024-09-30030 September 2024 Adtf Exemption Request Pre-submittal Meeting Presentation ML24190A1452024-07-0808 July 2024 Public Meeting Slides for Arkansas Nuclear One 2023 Annual Assessment, Pope County Quorum Court ML23348A3572023-12-14014 December 2023 Application to Revise Technical Specifications to Use Online Monitoring Methodology – Slides and Affidavit for Pre-Submittal Meeting ML23296A1002023-10-24024 October 2023 Entergy Presentation Slides for Pre-Submittal Meeting on 10/24/23, Mtc LAR ML23223A2032023-08-11011 August 2023 (ANO) Unit 1 Licensee'S Slide Presentation for 8/15/23 Public Meeting Pressurizer Heaters ML22193A0262022-07-12012 July 2022 (ANO) RICT License Amendment Request TSTF-505 NRC Pre-Submittal Meeting Presentation - July 13, 2022 ML22164A8012022-06-13013 June 2022 Entergy Fleet (GGNS, RBS, and WF-3) - Code Case N-752 RR 6-14-22 Pre-Submittal Public Meeting Presentation Slides ML22124A0692022-05-10010 May 2022 RVCH Penetration No. 1 Relief Request Public Meeting May 10, 2022 (EPID L-2022-LRM-0036) (Slides) ML21351A0282021-12-16016 December 2021 Preliminary Information of ANO-1 1R17 (2002) Findings on CRDM Nozzle 56, and Presentation Slides for PT Exam of Nozzle 56 ML21348A1262021-12-14014 December 2021 RCP TS LAR Pre-Submittal Meeting Slides, December 16, 2021 ML21319A2452021-11-15015 November 2021 Natrium Energy Island Decoupling Strategy - 11-17-2021 ML21309A0622021-11-0909 November 2021 NRC Slides for November 9, 2021, Technology Inclusive Content of Application Project Public Meeting ML21306A3162021-11-0909 November 2021 Digital IC Presentation 11/09/2021 ML21312A0342021-11-0909 November 2021 Combined Slides for November 9, 2021, Technology Inclusive Content of Application Project Public Meeting ML21200A1792021-07-31031 July 2021 Scale/Melcor Non-LWR Source Term Demonstration Project - High Temperature Gas-Cooled Reactor 0CAN062101, Presentation Information for Pre-Submittal Meeting Regarding the Response to Request for Additional Information - Proposed Alternative to ASME Section XI Requirements for Repair/Replacement of Emergency Cooling2021-06-15015 June 2021 Presentation Information for Pre-Submittal Meeting Regarding the Response to Request for Additional Information - Proposed Alternative to ASME Section XI Requirements for Repair/Replacement of Emergency Cooling ML21095A2122021-04-0808 April 2021 Pre-Submittal Meeting - ANO-1 LAR Related to RCS Primary Activity and Primary-to-Secondary Leak Rate ML20344A0572020-12-10010 December 2020 Combined Industry and NRC Slides for the December 10, 2020, Public Meeting on Technology Inclusive Content of Application Project, Advanced Reactor Content of Application Project and Applicability of Regulations to Non-Light Water Reactors ML20315A1582020-11-17017 November 2020 Presentation Meeting Slides for the 11/17/20 Teleconference ML20269A3452020-09-28028 September 2020 Pre-submittal Meeting for Request for One-Time Exemption from 10 CFR Part 50, Appendix E, Biennial EP Exercise (Offsite) Due to COVID-19- Entergy Presentation Slides ML20255A0242020-09-11011 September 2020 (Ano), Pre-Submittal Meeting with NRC - Request to Extend Allowable Outage Time (AOT) for the Emergency Cooling Pond (ECP) ML20211L7052020-08-0404 August 2020 (ANO) Units 1 & 2, Pre-Submittal Slide Presentation for August 4, 2020 Public Meeting ML20114E2752020-04-29029 April 2020 (ANO) Carbon Fiber Reinforced Polymer (Cfrp) Relief Request Pre-Submittal Meeting with NRC - April 29, 2020 ML18107A3342018-04-10010 April 2018 Tech Spec 3.3.5.2a Change Pre-Submittal Meeting Presentation Slides ML18075A1232018-03-20020 March 2018 Entergy Nuclear Operations - March 20, 2018, Presentation Slides for Surveillance Frequency Control Program, UFSAR Change Considerations ML18081A1922018-03-20020 March 2018 Presentation at the PRA Workshop ML17328A3652017-11-30030 November 2017 Workshop on Sharing Operating Experience from Rigging, Lifting and Load Handling Events - Temporary Overhead Crane Failure at Arkansas Nuclear One Presented to IAEA ML15132A1752015-05-21021 May 2015 Summary of Annual Assessment Meeting with Entergy Operations Inc., Regarding ANO 2014 Performance ML15014A0842015-01-14014 January 2015 NRC ANO Unit 1 Stator Drop SDP Evaluation ML14329B2092014-11-25025 November 2014 Summary of Regulatory Conference to Discuss Safety Significance of Arkansas Nuclear One Flood Protection Deficiencies ML14259A5972014-09-16016 September 2014 Summary of Annual Performance Assessment Meeting for Arkansas Nuclear One Performance ML14169A0722014-06-19019 June 2014 Entergy Public Meeting Presentation Slides ML13142A2272013-05-22022 May 2013 Summary of Public Meeting to Discuss Results of Augmented Inspection at Arkansas Nuclear One ML12332A1792012-11-26026 November 2012 Power Point Presentation by Entergy at the November 26, 2012 Meeting (TAC No. ME9706.) ML12275A5492012-10-0101 October 2012 Summary of Meeting with Entergy Operations, Inc., to Discuss the Performance of the Subject Facilities, Recent Organizational Changes, and Current Regulatory Issues ML1218003062012-06-28028 June 2012 Handouts at the June 29, 2012 NFPA 805 Meeting at the Hq - Power Point Slides ML1202501112012-01-25025 January 2012 Licensee Slides Arkansas Nuclear One, Unit 1 - Steam Generators Tube to Tube Wear ML1126502692011-09-22022 September 2011 Licensee Handouts for 10/05/2011 Presubmittal Meeting ML11221A3212011-08-0101 August 2011 521- R326C B&W Tech Cross Training - Chapter 17 ANO-1 Seal Failure ML1110401532011-04-13013 April 2011 Licensee Slides from 4/13/11 Meeting with Entergy Operations, Inc., to Discuss Proposed National Fire Protection Programs Standards 805 License Amendment Submittal for Arkansas Nuclear One, Units 1 & 2 ML1107504262011-03-15015 March 2011 Licensee Slides from 3/15/11 Pre-Sumittal Meeting SWS Room Cooling Required Action ML1107504162011-03-15015 March 2011 Licensee Slides from 3/15/11 Meeting with Entergy Operations on Technical Specification Change - Testing of Idle RCS Cooling Loop ML1016705012010-06-17017 June 2010 Discussion of Screening Criteria - Arkansas Nuclear One (ANO) ML0935201272009-12-18018 December 2009 Nrc/Entergy Operations, Inc., Management Meeting ML0913104172009-05-11011 May 2009 Summary of Meeting with Entergy to Discuss Arkansas Nuclear One 2008 Performance ML0831102062008-11-0606 November 2008 Summary of Meeting with Entergy to Discuss an Open Substantive Crosscutting Issue at Arkansas Nuclear One ML0828000612008-10-0101 October 2008 Enclosure 3-Technical Papers 2 - Plant Application of Weld Onlay for Butt Weld Mitigation ML0828300322008-08-31031 August 2008 NRC Presentation Arkansas Nuclear One - Unit One ML0814306742008-05-22022 May 2008 Summary of Annual Performance Assessment Meeting for Arkansas Nuclear One ML0718004262007-06-29029 June 2007 Summary of Arkansas Nuclear One End-Of-Cycle Public Meeting 2024-09-30
[Table view] |
Text
ANO-2 NFPA 805 Application NRC Public Meeting - November 26, 2012 In advance of the ANO-2 re-submittal of its NFPA 805 application and as a follow-up to a public meeting held on October 9, 2012, Entergy requested an additional public meeting with the NRC in order to ensure gaps which resulted in non-acceptance non acceptance of the previous ANO ANO-2 2 License Amendment Request (LAR) will be resolved appropriately.
Agenda
- 1. Entergys proposed resolution to each of the previously identified gaps 2
- 2. Open discussion (following each resolution presentation)
ANO-2 NFPA 805 Application Issue #1 - Transition Risk
- Variances from Deterministic Requirements q ((VFDRs)) have been identified and mapped to the respective probabilistic risk analysis (PRA) modeled equipment in order to determine the compliant case core damage frequency (CDF) and large early release frequency (LERF) for all scenarios in Fire Area G (including control room non-abandonment scenarios)
- The VFDRs address the following Safety Functions:
- Reactor Coolant System Pressure Control
- Inventory
- Decay Heat Removal
- Vital Auxiliaries - Electrical
- Vital Auxiliaries - Service Water
- Vital Auxiliaries - Heating, Ventilation, and Air Conditioning
ANO-2 NFPA 805 Application Issue #1 - Transition Risk (continued)
- The Variant Case was calculated for these same scenarios by failing the equipment affected by fire and crediting a new Auxiliary F d t (AFW) pump modification Feedwater difi ti which hi h is i nott impacted i t d by b a fire in Fire Area G
- The Compliant p Case was calculated by y setting g the equipment q p credited for shutdown for a fire in Fire Area G to its random failure probability; no credit was taken for the new AFW pump
- Delta risk results for the Control Room Analysis (results have not yet been certified):
- CDF - (-7.40E-05/yr)
- LERF - (-2.68E-06/yr)
ANO-2 NFPA 805 Application Issue #1 - Transition Risk (continued)
OPEN DISCUSSION
ANO-2 NFPA 805 Application Issue #2 - Sensitivity Analysis on the use of Unapproved Methods
- U Use off unapprovedd methods th d (i (i.e. electrical l t i l panell ffactors t and d llong term manual non-suppression probabilities) have been removed and replaced with approved methodologies
- Detailed fire modeling has been performed on the affected areas
- Use of new ignition frequencies from FAQ 08-0048 Fire Ignition Frequency were applied Frequency
ANO-2 NFPA 805 Application Issue #2 - Sensitivity Analysis on the use of Unapproved Methods (continued)
- The Sensitivity Analysis addresses:
- Multi-Compartment M lti C t t Analysis A l i / HotH tG Gas Layer L (MCA/HGL) screening i analysis l i
- Calculates new CDF/LERF values
- Calculates new delta CDF/LERF values
- Focused Scope Peer Review is near completion
- Results of the Sensitivity Analysis (results have not yet been certified):
- New CDF - 5.10E-05/yr (Fire CDF only, excludes internal events and other external events)
- Previously submitted CDF - 6.4E 6 4E-05/yr 05/yr (Fire CDF only)
- New LERF - 1.08E-06/yr (Fire LERF only)
- Previously submitted LERF - 1.4E-06/yr (Fire LERF only)
ANO-2 NFPA 805 Application Issue #2 - Sensitivity Analysis on the use of Unapproved Methods (continued)
- Results of the Sensitivity Analysis (continued):
- New Delta CDF - (-4.28E-04/yr)
- New Delta LERF - (-1.26E-05/yr)
- MCA/HGL Analysis
- New Scenarios with a larger zone of influence were developed and quantified after not screening
- 2109-U-B/C/D/E/F/G
- 2154-E
- Sensitivity Analysis will become the Model of Record after submittal and prior to transition to NFPA-805 is complete
ANO-2 NFPA 805 Application Issue #2 - Sensitivity Analysis on the use of Unapproved Methods (continued)
OPEN DISCUSSION
ANO-2 NFPA 805 Application Issue #3 - New Results could precipitate further changes to the plant or PRA
- Two new Modifications proposed:
- Incipient detection for Panel 2C75 in 2154-E (Fire Area B-4)
- The Reactor Coolant System (RCS) head vent valves to preclude spurious operation in Fire Area 2199-G 2199 G (Fire Area G)
- No new Recoveries were identified
- No other changes to the Fire PRA model are anticipated
ANO-2 NFPA 805 Application Issue #3 - New Results could precipitate further changes to the plant or PRA (continued)
OPEN DISCUSSION