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Initiation
- Request, Request, Request, 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, Meeting, Meeting
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MONTHYEARML0506900352005-03-0303 March 2005
Response to NRC Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors
Project stage: Request
ML0515100172005-05-31031 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
ML0520200572005-07-15015 July 2005
Response to NRC Request for Additional Information Re NRC Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors
Project stage: Response to 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
Project stage: RAI
ML0609500512006-04-12012 April 2006
Approval of Extension Request for Completion of Corrective Actions in Response to Generic Letter 2004-02
Project stage: Other
ML0618702222006-06-30030 June 2006
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
Project stage: Other
ML0633407022006-12-18018 December 2006
Unit No.1 - Approval of Extension Request for Completion of Corrective Action in Response to Generic Letter 2004-02
Project stage: Other
ML0712703722007-05-0202 May 2007
Revision to Generic Letter 2004-02 Response
Project stage: Other
ML0734504992007-12-10010 December 2007
Attachment (1) Request for Extension of the Completion Date for Corrective Actions Related to Generic Letter 2004-02
Project stage: Request
ML0734504982007-12-10010 December 2007
Request for Extension for Completion of Activities Related to Generic Letter 2004-02
Project stage: Request
ML0811307392008-04-22022 April 2008
Revision to Generic Letter 2004-02 Response
Project stage: Other
ML0817101052008-06-18018 June 2008
Attachment 1, Request for Extension of the Completion Date for Corrective Actions Related to Generic Letter 2004-02
Project stage: Request
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
ML0827404972008-09-30030 September 2008
Attachment 2, ECCS and CS System Figures
Project stage: Other
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
ML1009500782010-04-12012 April 2010
Request for Additional Information Generic Letter 2004-02 Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2-
Project stage: RAI
ML1011903842010-05-0606 May 2010
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
Project stage: Meeting
ML1028701002010-09-30030 September 2010
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..
Project stage: Draft Response to RAI
ML1029306502010-10-20020 October 2010
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,
Project stage: Other
ML1030810242010-11-10010 November 2010
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
ML1031903612010-11-10010 November 2010
Response to Request for Additional Information Regarding Generic Letter 2004-02
Project stage: Response to RAI
ML12356A0852012-12-27027 December 2012
January 8, 2013 - Notice of Teleconference with Calvert Cliffs Nuclear Power Plant, LLC
Project stage: Meeting
ML13038A5432013-01-24024 January 2013
Chemical Effects Head Loss Experiment (Chle) Test Protocol for Calvert Cliffs Nuclear Power Plant (CCNPP-CHLE-002, Revision 0d)
Project stage: Request
ML13038A6042013-01-24024 January 2013
PIRT Item Summary
Project stage: Request
ML13038A4872013-01-24024 January 2013
CCNPP-CHLE-001, Revision 0c, Chemical Effects Head Loss Experiment (Chle) Test Plan for Calvert Cliffs Nuclear Power Plant
Project stage: Request
ML13038A5782013-01-24024 January 2013
Chemical Effects Pirt Considerations for Calvert Cliffs Nuclear Power Plant (CCNPP-CHLE-003, Revision 0b)
Project stage: Request
ML13086A5512013-01-24024 January 2013
MC4672 & MC4673 - CCNPP-CHLE-003, Rev 0c Chemical Effects PIRT Considerations Excerpts with Respect to GL2004-02, GSI-191
Project stage: Other
ML13030A3482013-02-0707 February 2013
Summary of Teleconference with Calvert Cliffs Nuclear Power Plant, Units 1 and 2 to Discuss Proposed Risk-Informed Approach to the Resolution of Generic LTR 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Des
Project stage: Meeting
ML13045A1822013-02-19019 February 2013
March 20, 2013, Notice of Forthcoming Teleconference with Calvert Cliffs and Nrc/Nrr Staff to Have Additional Discussions of Licenseess Proposed Path for Resolution of Generic Letter 2004-02
Project stage: Meeting
ML13050A5112013-02-19019 February 2013
MC4672-3 Corrected Notice -Public Meeting on March 20, 2013 Re-GL2004-02
Project stage: Request
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
ML13088A2202013-03-18018 March 2013
MC4672 & MC4673 - CCNPP-CHLE-005, Rev 1 Chemical Effects Autoclave Experimental Plan with Respect to GL2004-02, GSI-1 91
Project stage: Request
ML13086A5492013-03-20020 March 2013
MC4672 & MC4673 - Licensee Presentation-Category 1, Public Meeting on March 20, 2013 with Respect to GL2004-02, GSI-191
Project stage: Meeting
ML13091A0552013-04-10010 April 2013
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
Project stage: Meeting
ML13149A3942013-05-20020 May 2013
Chemical Effects Head Loss Experiment (Chle) Test Protocol for Calvert Cliffs Nuclear Power Plant, CCNPP-CHLE-002, Revision 0 May 20, 2013
Project stage: Request
ML13149A3992013-05-20020 May 2013
Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005, Revision 2, May 20, 2013
Project stage: Request
ML13149A4052013-05-23023 May 2013
Metals BENCH-TOP Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant, CCNPP-CHLE-006, Revision 0, May 23, 2013
Project stage: Request
ML13148A3962013-05-29029 May 2013
Forthcoming Meeting with Calvert Cliffs Nuclear Power Plant, LLC to Discuss Licensees Proposed Plan for Resolution of GL 2004-02
Project stage: Meeting
ML13179A3132013-07-11011 July 2013
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
Project stage: Meeting
ML13224A0942013-08-0606 August 2013
Chemical Effects PIRT Considerations for Calvert Cliffs Nuclear Power Plant, CCNPP-CHLE-003, Revision 0c
Project stage: Request
ML13224A1032013-08-0808 August 2013
CCNPP-CHLE-007, Revision 0c, Coatings Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant
Project stage: Request
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,
Project stage: Meeting
ML13319A9392013-11-13013 November 2013
Ri GSI-191 November 2013 Meeting with NRC Rev 0
Project stage: Request
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 .
Project stage: Meeting
ML14014A0392014-01-29029 January 2014
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
Project stage: Meeting
2010-06-07
[Table View] |
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 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 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
0 1
2 3
4 5
6 7
8 9
10 11 Head Loss [ft]
Start of test (t = 0 hrs)
Vertical Loop Online (t = 0.9 hrs)
High Range DP Cell Pegged (t = 3.7 hrs)
Higher Range DP Cell Installed (t = 4.3 hrs)
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
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 0
0.5 1
1.5 2
2.5 3
3.5 4
0 0.5 1
1.5 2
Head 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
