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| {{#Wiki_filter:Calvert Cliffs GSI-191 Program Chemical Effects Testing Update Option 2b Closure Approach August 2015 Agenda Introductions Objectives for Meeting Discussion of Chemical Effects Test Plans Discussion of Option 2b Simplified Risk-Informed Closure Plan Refined Debris Generation Topics Strainer Head Loss Testing Strainer Head Loss Correlation Staff Questions & Concerns Schedule for Future Periodic Meetings Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 1 CCNPP Attendees Andre Drake Lead Responsible Engineer GSI-191 Anne Elliott Mechanical Design Engineer Ken Greene Licensing Engineer Craig Sellers Project Manager GSI-191 Steve Kinsey Chemical Effects Testing Eric Federline Project Support & Testing Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 2 Objectives of this Meeting Status of CHLE Testing Status of Risk-Informed Approach Refined Debris Generation Topics Strainer Head Loss Testing Strainer Head Loss Correlation Capture Staff Issues and Concerns Discuss Next Steps Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 3 Status of CHLE Testing First Integrated Test Initiated April 17, 2015 Detector Bed Head Loss Immediately Started Increasing Head loss increased until the test was terminated Started at 1.44 ft Test terminated at 10.25 ft, and rising Test lasted approximately 4.6 hrs Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 4 Status of CHLE Testing (continued) Performed Multiple Investigatory Tests Investigatory Head Loss Testing of Materials Baked Nukon Binder Water Notable Head Loss Impact Unbaked Nukon Water No Notable Head Loss Impact Marinite Board Notable Head Loss Impact Dimetcote 9 IOZ Powder Notable Head Loss Impact Mineral Wool No Notable Head Loss Impact Chemical Analysis of Filtered Material Mineral wool particles - Observed Lead particles Analyzing Aluminosilicate Clay Analyzing Organic Material Analyzing, Believed to be Binder from Fiberglass Head Loss Increase Due to Particulate Migration to Debris Bed Detector Debris Bed Significantly Smaller than Equivalent Installed Strainer 2% of full strainer surface area 12% of circumscribed strainer surface area Much more susceptible to particulate head loss increase Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 5 Simplified Risk-Informed Approach Identify Applicable Strainer Chemical Effects Head Loss Test WCAP-16530 Chemical Surrogates Identify Smallest Double-Ended Guillotine Break(s) that Generate Equivalent Quantity of Fine Fibrous Debris as used in Applicable and Acceptable Head Loss Test Smaller Breaks Acceptable Through Deterministic Analysis Larger Breaks Addressed Probabilistically (Risk-Informed) Two Independent Parallel Analysis Produced Same Positive Results ETRANCO Influence Matrix Approach ENERCON NARWHAL Analysis Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 6 Refined Debris Generation Topics Debris Size Distribution for Mineral Wool and Generic Fiberglass CCNPP Has Assumed Mineral Wool and Generic Fiberglass Debris was 100% Fines CCNPP Desires to Use a 4-Size Debris Distribution for these insulation types Fines, Small Pieces, Large Pieces, and Intact Pieces NRC Accepted 4-Size Debris Distribution for these insulation types at Indian Point [ML082050433, ML093290316, and ML101170237] Mineral wool and generic fiberglass have higher density than NUKON and Thermal Wrap Less Mineral wool and generic fiberglass debris than NUKON and Thermal Wrap CCNPP Insulation Densities NUKON & Thermal Wrap: 2.4 lbm/ft3 Mineral Wool: 8 lbm/ft3 Generic Fiberglass: 3.5 lbm/ft3 to 5.5 lbm/ft3 Mineral Wool and Generic Fiberglass Higher Densities than NUKON and Thermal Wrap CCNPP Debris Quantities NUKON & Thermal Wrap: 1,902 ft3 - 4,565 lbm Generic Fiberglass: 248 ft3 - 1,363 lbm (based on 5.5 lbm/ft3 maximum density) Mineral Wool: 61.5 ft3 - 492 lbm Mineral Wool and Generic Fiberglass Smaller Quantities than NUKON and Thermal Wrap Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 7 Strainer Head Loss Testing CCNPP Conducted 7 Strainer Head Loss Tests in 2010 Tests included WCAP-16530 Chemical Precipitate Surrogate Test #1 Included Fine and Small Fibrous Debris Maximum Head Loss 1.75 inches of water Non-Uniform Debris Deposition | | {{#Wiki_filter:Calvert Cliffs GSI-191 Program Chemical Effects Testing Update Option 2b Closure Approach August 2015 |
| | |
| | Agenda |
| | * Introductions |
| | * Objectives for Meeting |
| | * Discussion of Chemical Effects Test Plans |
| | * Discussion of Option 2b Simplified Risk-Informed Closure Plan |
| | * Refined Debris Generation Topics |
| | * Strainer Head Loss Testing |
| | * Strainer Head Loss Correlation |
| | * Staff Questions & Concerns |
| | * Schedule for Future Periodic Meetings 1 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | CCNPP Attendees |
| | * Andre Drake - Lead Responsible Engineer GSI-191 |
| | * Anne Elliott - Mechanical Design Engineer |
| | * Ken Greene - Licensing Engineer |
| | * Craig Sellers - Project Manager GSI-191 |
| | * Steve Kinsey - Chemical Effects Testing |
| | * Eric Federline - Project Support & Testing 2 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Objectives of this Meeting |
| | * Status of CHLE Testing |
| | * Status of Risk-Informed Approach |
| | * Refined Debris Generation Topics |
| | * Strainer Head Loss Testing |
| | * Strainer Head Loss Correlation |
| | * Capture Staff Issues and Concerns |
| | * Discuss Next Steps 3 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Status of CHLE Testing |
| | * First Integrated Test Initiated April 17, 2015 |
| | * Detector Bed Head Loss Immediately Started Increasing |
| | * Head loss increased until the test was terminated |
| | - Started at 1.44 ft |
| | - Test terminated at 10.25 ft, and rising |
| | * Test lasted approximately 4.6 hrs 11 Vertical Loop Online (t = 0.9 hrs) |
| | High Range DP Cell Higher Range DP Cell Start of test (t = 0 hrs) 10 Pegged (t = 3.7 hrs) 9 Installed (t = 4.3 hrs) 8 7 |
| | Head Loss [ft] |
| | 6 5 |
| | 4 3 |
| | 2 1 |
| | 0 4 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Status of CHLE Testing (continued) |
| | * Performed Multiple Investigatory Tests |
| | - Investigatory Head Loss Testing of Materials |
| | * Baked Nukon Binder Water - Notable Head Loss Impact |
| | * Unbaked Nukon Water - No Notable Head Loss Impact |
| | * Marinite Board - Notable Head Loss Impact |
| | * Dimetcote 9 IOZ Powder - Notable Head Loss Impact |
| | * Mineral Wool - No Notable Head Loss Impact |
| | - Chemical Analysis of Filtered Material |
| | * Mineral wool particles - Observed |
| | * Lead particles - Analyzing |
| | * Aluminosilicate Clay - Analyzing |
| | * Organic Material - Analyzing, Believed to be Binder from Fiberglass |
| | * Head Loss Increase Due to Particulate Migration to Debris Bed |
| | * Detector Debris Bed Significantly Smaller than Equivalent Installed Strainer |
| | - 2% of full strainer surface area |
| | - 12% of circumscribed strainer surface area |
| | - Much more susceptible to particulate head loss increase 5 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Simplified Risk-Informed Approach |
| | * Identify Applicable Strainer Chemical Effects Head Loss Test |
| | - WCAP-16530 Chemical Surrogates |
| | * Identify Smallest Double-Ended Guillotine Break(s) that Generate Equivalent Quantity of Fine Fibrous Debris as used in Applicable and Acceptable Head Loss Test |
| | * Smaller Breaks Acceptable Through Deterministic Analysis |
| | * Larger Breaks Addressed Probabilistically (Risk-Informed) |
| | * Two Independent Parallel Analysis Produced Same Positive Results |
| | - ETRANCO Influence Matrix Approach |
| | - ENERCON NARWHAL Analysis 6 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Refined Debris Generation Topics |
| | * Debris Size Distribution for Mineral Wool and Generic Fiberglass |
| | * CCNPP Has Assumed Mineral Wool and Generic Fiberglass Debris was 100% Fines |
| | * CCNPP Desires to Use a 4-Size Debris Distribution for these insulation types |
| | - Fines, Small Pieces, Large Pieces, and Intact Pieces |
| | * NRC Accepted 4-Size Debris Distribution for these insulation types at Indian Point [ML082050433, ML093290316, and ML101170237] |
| | - Mineral wool and generic fiberglass have higher density than NUKON and Thermal Wrap |
| | - Less Mineral wool and generic fiberglass debris than NUKON and Thermal Wrap |
| | * CCNPP Insulation Densities |
| | - NUKON & Thermal Wrap: 2.4 lbm/ft3 |
| | - Mineral Wool: 8 lbm/ft3 |
| | - Generic Fiberglass: 3.5 lbm/ft3 to 5.5 lbm/ft3 |
| | - Mineral Wool and Generic Fiberglass Higher Densities than NUKON and Thermal Wrap |
| | * CCNPP Debris Quantities |
| | - NUKON & Thermal Wrap: 1,902 ft3 - 4,565 lbm |
| | - Generic Fiberglass: 248 ft3 - 1,363 lbm (based on 5.5 lbm/ft3 maximum density) |
| | - Mineral Wool: 61.5 ft3 - 492 lbm |
| | - Mineral Wool and Generic Fiberglass Smaller Quantities than NUKON and Thermal Wrap 7 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Strainer Head Loss Testing |
| | * CCNPP Conducted 7 Strainer Head Loss Tests in 2010 |
| | - Tests included WCAP-16530 Chemical Precipitate Surrogate |
| | * Test #1 Included Fine and Small Fibrous Debris |
| | - Maximum Head Loss 1.75 inches of water |
| | - Non-Uniform Debris Deposition |
| | - |
|
| |
|
| == Conclusion:== | | == Conclusion:== |
| Testing with Small Pieces is Non-Conservative Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 8 Strainer Head Loss Testing (continued) Remaining Tests Used Only Fine Fibrous Debris Full load of particulates and precipitates Test for Success Campaign Break-throughs experienced during each test Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 9 Strainer Head Loss Testing (continued) Tests included same insulation types as installed in plant EXCEPT no mineral wool was included in tests Test for success campaign based on multiple insulation replacement schemes all of which included 100% replacement of mineral wool Significantly larger particulate load used in test. CCNPP particulate source term reduced since 2010 Mineral wool <10% of fiber debris source term CHLE investigatory tests showed no notable head loss impact from mineral wool Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 10 Strainer Head Loss Correlation Plot of Head Loss vs- Fiber Mass produces well correlated curve fit Plot includes clean strainer head loss Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 11 y = 0.0803e2.1877x R² = 0.9939 00.511.522.533.5400.511.52Head Loss (ft-water) Debris Mass (kg) Head Loss Data - Test Data + Clean Screen Questions/Concerns Jointly Review Issues, Questions, and Concerns for Future Communication Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 12 Next Steps Update Debris Generation Calculations Present Risk-Informed GSI-191 Analysis Results Desire Next Meeting October 2015 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan 13}} | | Testing with Small Pieces is Non-Conservative 8 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Strainer Head Loss Testing (continued) |
| | * Remaining Tests Used Only Fine Fibrous Debris |
| | - Full load of particulates and precipitates |
| | - Test for Success Campaign |
| | - Break-throughs experienced during each test 9 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Strainer Head Loss Testing (continued) |
| | * Tests included same insulation types as installed in plant |
| | - EXCEPT no mineral wool was included in tests |
| | * Test for success campaign based on multiple insulation replacement schemes all of which included 100% replacement of mineral wool |
| | * Significantly larger particulate load used in test. |
| | - CCNPP particulate source term reduced since 2010 |
| | * Mineral wool <10% of fiber debris source term |
| | * CHLE investigatory tests showed no notable head loss impact from mineral wool 10 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Strainer Head Loss Correlation |
| | * Plot of Head Loss -vs- Fiber Mass produces well correlated curve fit |
| | * Plot includes clean strainer head loss Head Loss Data - Test Data + Clean Screen 4 |
| | 3.5 3 |
| | Head Loss (ft-water) 2.5 y = 0.0803e2.1877x R² = 0.9939 2 |
| | 1.5 1 |
| | 0.5 0 |
| | 0 0.5 1 1.5 2 Debris Mass (kg) 11 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Questions/Concerns |
| | * Jointly Review Issues, Questions, and Concerns for Future Communication 12 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan |
| | |
| | Next Steps |
| | * Update Debris Generation Calculations |
| | * Present Risk-Informed GSI-191 Analysis Results |
| | * Desire Next Meeting - October 2015 13 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan}} |
Letter Sequence Request |
|---|
|
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance...
- Supplement, Supplement
Administration
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
|
MONTHYEARML0515100172005-05-31031 May 2005
Draft RAI on Response to Generic Letter 2004-02
Project stage: Draft RAI
ML0515303042005-06-0303 June 2005
6/3/05, Calvert Cliffs - RAI Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reactors
Project stage: RAI
ML0603803582006-02-0909 February 2006
RAI, Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design-Basis Accidents at Pressurized-Water Reactors
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ML0609500512006-04-12012 April 2006
Approval of Extension Request for Completion of Corrective Actions in Response to Generic Letter 2004-02
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ML0618702222006-06-30030 June 2006
Calvert Cliffs, Units 1 & 2 Update of Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Basis Accidents at Pressurized Water Reactors
Project stage: Other
ML0626405472006-09-20020 September 2006
Update of Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors
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ML0633407022006-12-18018 December 2006
Unit No.1 - Approval of Extension Request for Completion of Corrective Action in Response to Generic Letter 2004-02
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ML0712703722007-05-0202 May 2007
Calvert Cliffs Revision to Generic Letter 2004-02 Response
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ML0734504992007-12-10010 December 2007
Attachment (1) Request for Extension of the Completion Date for Corrective Actions Related to Generic Letter 2004-02
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ML0734504982007-12-10010 December 2007
Request for Extension for Completion of Activities Related to Generic Letter 2004-02
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ML0811307392008-04-22022 April 2008
Revision to Generic Letter 2004-02 Response
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ML0817101052008-06-18018 June 2008
Attachment 1, Request for Extension of the Completion Date for Corrective Actions Related to Generic Letter 2004-02
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ML0827404972008-09-30030 September 2008
Calvert Cliffs Nuclear Plant, Attachment 2, ECCS and CS System Figures
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ML0827404892008-09-30030 September 2008
Supplemental Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors.
Project stage: Supplement
ML0833003202008-12-0404 December 2008
Request for Additional Information Supplemental Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors-Calvert Cliffs Unit 1 & 2
Project stage: RAI
ML0906807672009-03-0404 March 2009
Request for Additional Information: Supplemental Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors
Project stage: Supplement
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Request for Additional Information Generic Letter 2004-02 Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2-(TAC Nos. MC4672 and MC4673)
Project stage: RAI
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Notice of Forthcoming Conference Call with Calvert Cliffs to Discuss Supplemental Responses to Generic Ltr. 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors
Project stage: Request
ML1014708982010-06-0707 June 2010
Summary of Meeting with Calvert Cliffs Nuclear Power Plant, LLC, to Discuss Supplement to Responses to Generic Letter 2004-02
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Catawba Units 1 & 2, Draft Responses to NRC Request for Additional Information Related to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents on Pressurized-Water....
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Notice of Forthcoming Conference Call with Duke Energy Carolinas, LLC Regarding McGuire Nuclear Station, Units 1 and 2 and Catawba Nuclear Station, Units 1 and 2,
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Summary of November 1, 2010, Meeting with Duke to Discuss Responses to Generic Letter (GL) 2004-02 (Tac Nos. MC4673, MC4674, MC4692, and MC4693)
Project stage: Meeting
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Response to Request for Additional Information Regarding Generic Letter 2004-02 (TAC Nos. MC4672 and MC4673)
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MC4672 & MC4673 - CCNPP-CHLE-003, Rev 0c Chemical Effects Pirt Considerations Excerpts with Respect to GL2004-02, GSI-191
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Chemical Effects Head Loss Experiment (Chle) Test Protocol for Calvert Cliffs Nuclear Power Plant (CCNPP-CHLE-002, Revision 0d)
Project stage: Request
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MC4672-3 Corrected Notice -Public Meeting on March 20, 2013 Re-GL2004-02
Project stage: Request
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March 20, 2013, Notice of Forthcoming Teleconference with Calvert Cliffs and Nrc/Nrr Staff to Have Additional Discussions of Licensees'S Proposed Path for Resolution of Generic Letter 2004-02
Project stage: Meeting
ML13086A5502013-03-0101 March 2013
MC4672 & MC4673, CCNPP-CHLE-002, Rev 0e Chemical Effects Experimental Protocol with Respect to GL2004-02, GSI-191.
Project stage: Request
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MC4672 & MC4673 - CCNPP-CHLE-005, Rev 1 Chemical Effects Autoclave Experimental Plan with Respect to GL2004-02, GSI-1 91
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MC4672 & MC4673 - Licensee Presentation-Category 1, Public Meeting on March 20, 2013 with Respect to GL2004-02, GSI-191
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Summary of Meeting on March 20, 2013, with Calvert Cliffs Nuclear Power Plant, LLC, to Discuss the Proposed Risk-Informed Approach to the Resolution of Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation D
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Chemical Effects Head Loss Experiment (Chle) Test Protocol for Calvert Cliffs Nuclear Power Plant, CCNPP-CHLE-002, Revision 0 May 20, 2013
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Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005, Revision 2, May 20, 2013
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Project stage: Request
ML13148A3962013-05-29029 May 2013
Forthcoming Meeting with Calvert Cliffs Nuclear Power Plant, LLC to Discuss Licensee'S Proposed Plan for Resolution of GL 2004-02
Project stage: Meeting
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June 12, 2013 Summary of Meeting with Constellation Energy Group, Inc., to Continue Discussions on the Proposed Risk-Informed Approach to the Resolution of Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculati
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Chemical Effects Pirt Considerations for Calvert Cliffs Nuclear Power Plant, CCNPP-CHLE-003, Revision 0c
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CCNPP-CHLE-007, Revision 0c, Coatings Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant.
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ML13226A0902013-08-14014 August 2013
Notice of Forthcoming Meeting with Constellation Energy Nuclear Group, LLC
Project stage: Meeting
ML13304B4032013-11-0101 November 2013
Notice of Forthcoming Meeting with Constellation Energy Nuclear Group, LLC,
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Ri GSI-191 November 2013 Meeting with NRC Rev 0
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ML13310B9292013-12-0606 December 2013
Summary of Meeting with Constellation Energy Group, Inc., to Continue Discussions on the Proposed Risk-Informed Approach to the Resolution of Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During ...
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Long-Term Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant. CCNP-CHLE-011, Revision 2
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Conrete Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant. CCNPP-CHLE-010, Revision 1
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May 21, 2014 Summary of Meeting with Exelon Generation Company, LLC, to Continue Discussions on the Proposed Risk-Informed Approach to the Resolution of Generic Letter 2004-02
Project stage: Meeting
ML14206A2062014-11-0707 November 2014
July 2, 2014 Summary of Meeting with Exelon Generation Company, LLC to Continue Discussions on the Proposed Risk-Informed Approach to the Resolution of Generic Letter 2004-02
Project stage: Meeting
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May 19, 2015 Summary of Meeting with Exelon Generation Company, LLC, on Calvert Cliffs Nuclear Power Plant, Units 1 and 2 - Chemical Effects Testing for Resolution of Generic Letter 2004-02 (TAC Nos. MC4672 & MC4673)
Project stage: Meeting
ML15222A5472015-08-31031 August 2015
GSI 191 Program Chemical Effects Testing Update Option 2b Closure Approach
Project stage: Request
2013-11-01
[Table View] |
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Category:Meeting Briefing Package/Handouts
MONTHYEARML24029A1742024-01-30030 January 2024
Constellation Pre-Application January 30, 2024, Meeting Slides - Proposed Alternative to Utilize Code Case N-932, Alternative Requirements for Acceptance of Containment Base Metal Corrosion or Erosion
ML23317A0712023-11-14014 November 2023
NRC Pre-Submittal Meeting on November 14th, 2023 - TSTF-591 and Selected 50.69 License Condition Updates (EPID L-2023-LLM-0098) (Slides)
ML23255A1042023-08-11011 August 2023
Slides - Constellation - Pre-Application EP 9/18/2023 Draft CEG Presubmittal SG Performance Monitoring Plan Meeting Handout
ML23157A0352023-06-0606 June 2023
Annual Assessment Meeting for Pa/Md/Ny/Nj Nuclear Power Plants - NRC Presentation Slides
ML23033A6662023-02-0909 February 2023
Summary of Public Meeting with Constellation Energy Generation, LLC (Constellation) to Discuss Its Request for Alternatives for Certain Steam Generator Weld Inspections for Calvert Cliffs 1 & 2, Byron 1 & 2, Braidwood 1 & 2, and Ginna
ML23033A6672023-01-30030 January 2023
Public Call with Constellation January 30, 2023 (Slides)
ML22013A3942022-01-13013 January 2022
Presentation Information for Pre-Submittal Meeting Regarding Relief Request to Use the Carbon Fiber Reinforced Polymer (Cfrp) Composite System
ML21314A4472021-11-10010 November 2021
Slides for Presubmittial Meeting for Proposed Alternative to Adopt ASME Code Case N-921 to Extend the Inservice Inspection Interval
ML21165A1942021-06-16016 June 2021
Joint Annual Assessment Meeting for Pa/Md/Nj/Ny Nuclear Power Plants - Webinar Presentation
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Joint Annual Assessment for Pa/Md/Nj/Ny Nuclear Power Plants - Webinar Presentation (Updated)
ML21144A0172021-05-24024 May 2021
Spent Fuel Pool Cooling - Shutdown Cooling Licensing Design Basis License Amendment Request Pre-Submittal Meeting
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Spent Fuel Pool Cooling - Shutdown Cooling Licensing Design Basis License Amendment Request - NRC Pre-submittal Meeting Telecon May 24, 2021 (EPID L-2021-LRM-0051) (Slides)
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Pre-Submittal Slides Extend 120-month Isi/Ist Interval Under 50.55a
ML20246G8772020-09-0303 September 2020
Licensee'S Presentation for September 3, 2020 Public Telephone Conference
ML20178A4202020-06-30030 June 2020
NEI Slides for June 30, 2020, Public Meeting on COVID-19 Response
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Risk-Informed Inservice Inspection - U.S Nuclear Regulatory Commission (NRC) - Four Element Risk-Informed Approach
ML20170B0212020-06-23023 June 2020
NRC Pre-Submittal Meeting Byron Unit 2 One-Time Deferral of Reactor Pressure Vessel Head Penetration Nozzle (Rpvhpn) Inspections
ML20169A5592020-06-16016 June 2020
Steam Generator License Amendment Request Pre-Submittal Meeting (NRC) - Byron Unit 2 LAR for One-Time Deferral of Steam Generator Inspections (Rev 1)
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6-16-20 Byron Unit 2 Steam Generator License Amendment Request Pre-Submittal Meeting (NRC) - Byron Unit 2 LAR for One-Time Deferral of Steam Generator Inspections
ML20168A3192020-06-15015 June 2020
Joint Annual Assessment Meeting for Pa/Md Power Plants - Webinar Presentation
ML19318F9512019-11-20020 November 2019
Presentation Slides for November 20, 2019, Pre-Application Meeting - Request for Revision to Quality Assurance Program Internal Audit Frequency
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In-Service Testing Supplemental Position Indication Relief Request NRC Pre-Application Meeting November 18, 2019
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Meeting Between NRC and Exelon Regarding Calvert Cliffs-2 LAR to Use Framatome ATF LTAs
ML19161A2572019-06-0404 June 2019
BWR Fleet Msv/Srv - Testing Frequency Relief Request NRC Pre-Application Meeting June 4, 2019
ML19151A6602019-05-31031 May 2019
BWR Fleet Mssv/Srv Testing Frequency Relief Request NRC Pre-Application Meeting June 4, 2019
ML19022A2002019-01-23023 January 2019
Request for Use of ASME Code Case N-879 for Exelon Nuclear Power Plants
ML18347B3142018-12-19019 December 2018
Bwrvip/Asme Relief Request Discussion December 19, 2018
ML18334A2162018-11-30030 November 2018
Presentation Slides: Exelon BWR MSIV (Boiling-Water Reactor - Main Steam Isolation Valve) Leakage Optimization for NRC Pre-Submittal Meeting of December 6, 2018
ML18319A1272018-11-19019 November 2018
Slides for 11/19/18 Public Meeting - Exelon Fleet LAR for Common Language for TS 5.7 High Radiation Areas
ML18276A0712018-10-0404 October 2018
Exelon'S Presentation for October 4, 2018 Public Pre-Submittal Meeting on Planned Calvert Cliffs 10CFR50.69 LAR
ML18171A0842018-06-21021 June 2018
GSI-191 Program Use of Risk Metrics for Containment Sump Tech Spec Operability Determination June 21, 2018 Public Meeting Slides (MF8521, MF8522; L-2016-LRM-0001)
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Category:Slides and Viewgraphs
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Text
Calvert Cliffs GSI-191 Program Chemical Effects Testing Update Option 2b Closure Approach August 2015
Agenda
- Discussion of Chemical Effects Test Plans
- Discussion of Option 2b Simplified Risk-Informed Closure Plan
- Refined Debris Generation Topics
- Strainer Head Loss Testing
- Strainer Head Loss Correlation
- Staff Questions & Concerns
- Schedule for Future Periodic Meetings 1 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
CCNPP Attendees
- Andre Drake - Lead Responsible Engineer GSI-191
- Anne Elliott - Mechanical Design Engineer
- Ken Greene - Licensing Engineer
- Craig Sellers - Project Manager GSI-191
- Steve Kinsey - Chemical Effects Testing
- Eric Federline - Project Support & Testing 2 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Objectives of this Meeting
- Status of Risk-Informed Approach
- Refined Debris Generation Topics
- Strainer Head Loss Testing
- Strainer Head Loss Correlation
- Capture Staff Issues and Concerns
- Discuss Next Steps 3 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Status of CHLE Testing
- First Integrated Test Initiated April 17, 2015
- Detector Bed Head Loss Immediately Started Increasing
- Head loss increased until the test was terminated
- Started at 1.44 ft
- Test terminated at 10.25 ft, and rising
- Test lasted approximately 4.6 hrs 11 Vertical Loop Online (t = 0.9 hrs)
High Range DP Cell Higher Range DP Cell Start of test (t = 0 hrs) 10 Pegged (t = 3.7 hrs) 9 Installed (t = 4.3 hrs) 8 7
Head Loss [ft]
6 5
4 3
2 1
0 4 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Status of CHLE Testing (continued)
- Performed Multiple Investigatory Tests
- Investigatory Head Loss Testing of Materials
- Baked Nukon Binder Water - Notable Head Loss Impact
- Unbaked Nukon Water - No Notable Head Loss Impact
- Marinite Board - Notable Head Loss Impact
- Dimetcote 9 IOZ Powder - Notable Head Loss Impact
- Mineral Wool - No Notable Head Loss Impact
- Chemical Analysis of Filtered Material
- Mineral wool particles - Observed
- Lead particles - Analyzing
- Aluminosilicate Clay - Analyzing
- Organic Material - Analyzing, Believed to be Binder from Fiberglass
- Head Loss Increase Due to Particulate Migration to Debris Bed
- Detector Debris Bed Significantly Smaller than Equivalent Installed Strainer
- 2% of full strainer surface area
- 12% of circumscribed strainer surface area
- Much more susceptible to particulate head loss increase 5 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Simplified Risk-Informed Approach
- Identify Applicable Strainer Chemical Effects Head Loss Test
- WCAP-16530 Chemical Surrogates
- Identify Smallest Double-Ended Guillotine Break(s) that Generate Equivalent Quantity of Fine Fibrous Debris as used in Applicable and Acceptable Head Loss Test
- Smaller Breaks Acceptable Through Deterministic Analysis
- Larger Breaks Addressed Probabilistically (Risk-Informed)
- Two Independent Parallel Analysis Produced Same Positive Results
- ETRANCO Influence Matrix Approach
- ENERCON NARWHAL Analysis 6 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Refined Debris Generation Topics
- Debris Size Distribution for Mineral Wool and Generic Fiberglass
- CCNPP Has Assumed Mineral Wool and Generic Fiberglass Debris was 100% Fines
- CCNPP Desires to Use a 4-Size Debris Distribution for these insulation types
- Fines, Small Pieces, Large Pieces, and Intact Pieces
- NRC Accepted 4-Size Debris Distribution for these insulation types at Indian Point [ML082050433, ML093290316, and ML101170237]
- Mineral wool and generic fiberglass have higher density than NUKON and Thermal Wrap
- Less Mineral wool and generic fiberglass debris than NUKON and Thermal Wrap
- CCNPP Insulation Densities
- NUKON & Thermal Wrap: 2.4 lbm/ft3
- Mineral Wool: 8 lbm/ft3
- Generic Fiberglass: 3.5 lbm/ft3 to 5.5 lbm/ft3
- Mineral Wool and Generic Fiberglass Higher Densities than NUKON and Thermal Wrap
- NUKON & Thermal Wrap: 1,902 ft3 - 4,565 lbm
- Generic Fiberglass: 248 ft3 - 1,363 lbm (based on 5.5 lbm/ft3 maximum density)
- Mineral Wool: 61.5 ft3 - 492 lbm
- Mineral Wool and Generic Fiberglass Smaller Quantities than NUKON and Thermal Wrap 7 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Strainer Head Loss Testing
- CCNPP Conducted 7 Strainer Head Loss Tests in 2010
- Tests included WCAP-16530 Chemical Precipitate Surrogate
- Test #1 Included Fine and Small Fibrous Debris
- Maximum Head Loss 1.75 inches of water
- Non-Uniform Debris Deposition
-
Conclusion:
Testing with Small Pieces is Non-Conservative 8 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Strainer Head Loss Testing (continued)
- Remaining Tests Used Only Fine Fibrous Debris
- Full load of particulates and precipitates
- Test for Success Campaign
- Break-throughs experienced during each test 9 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Strainer Head Loss Testing (continued)
- Tests included same insulation types as installed in plant
- EXCEPT no mineral wool was included in tests
- Test for success campaign based on multiple insulation replacement schemes all of which included 100% replacement of mineral wool
- Significantly larger particulate load used in test.
- CCNPP particulate source term reduced since 2010
- Mineral wool <10% of fiber debris source term
- CHLE investigatory tests showed no notable head loss impact from mineral wool 10 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Strainer Head Loss Correlation
- Plot of Head Loss -vs- Fiber Mass produces well correlated curve fit
- Plot includes clean strainer head loss Head Loss Data - Test Data + Clean Screen 4
3.5 3
Head Loss (ft-water) 2.5 y = 0.0803e2.1877x R² = 0.9939 2
1.5 1
0.5 0
0 0.5 1 1.5 2 Debris Mass (kg) 11 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Questions/Concerns
- Jointly Review Issues, Questions, and Concerns for Future Communication 12 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
Next Steps
- Update Debris Generation Calculations
- Present Risk-Informed GSI-191 Analysis Results
- Desire Next Meeting - October 2015 13 Calvert Cliffs Chemical Effects Testing & Option 2b Refined Closure Plan
