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Category:MEETING MINUTES & NOTES--CORRESPONDENCE
MONTHYEARML20206S6461999-02-17017 February 1999 Summary of ACRS Reliability & Probabilistic Risk Assessment, Plant Operations & on Regulatory Policies & Practices Subcommittees 981119-20 Meeting in Rockville,Md Re Options Make 10CFR50 & 10CFR50.59 risk-informed ML20206S4381999-01-25025 January 1999 Summary of 458th ACRS Meeting on 981203-05 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda ML20206S6611999-01-11011 January 1999 Summary of 981215-17 ACRS Thermal Hydraulic Phenomena Subcommittee Meeting in Rockville,Md Re T/H Code Activities/ NRC T/H Research Status ML20206S6101998-12-23023 December 1998 Summary of ACRS Reliability & Probabilistic Risk Assessment Subcommittee 981029 Meeting in Rockville,Md Re Options to Make 10CFR50 risk-informed,NEI Whole Plant Study & Options for Developing risk-informed Approach,Revising 10CFR50.59 ML20206S8501998-11-13013 November 1998 Summary of 456th ACRS Meeting on 980930-1002 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda ML20206S2481998-11-12012 November 1998 Summary of 455th ACRS Meeting on 980902-04 in Rockville,Md Re Items Listed in Attached Agenda ML20206S7621998-11-12012 November 1998 Summary of 980924 ACRS Submommittee on Reliability & PRA Open Meeting in Rockville,Md Re Proposed Options for Developing risk-informed Approach to Revising 10CFR50.59, Options for Broader Changes to 10CFR50 ML20206S4161998-09-29029 September 1998 Summary of 980826 Open ACRS Subcommittee on Reliability & PRA Meeting in Rockville,Md Re Issues in SRM on situation-specific Cases Where PRA Results & Insights Have Improved Existing Regulatory Sys ML20206S3851998-09-0303 September 1998 Summary of 980729 Open ACRS Joint Meeting of Subcommittees on Plant Operations & Fire Protection in Atlanta,Ga Re Region II Activities & Other Items of Mutual Interest, Including Significant Operating Events & Fire Protection ML20206S6831998-09-0101 September 1998 Summary of 453rd ACRS Meeting on 980603-05 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda ML20206S3761998-08-24024 August 1998 Summary of 980716 ACRS Plant License Renewal Subcommittee Meeting in Rockville,Md Re Presentations by & Holding Discussions with NRC Staff Re License Renewal,Proposed Staff Plans & Schedule for Reviewing License Renewal Applications ML20206S3811998-08-0404 August 1998 Summary of ACRS Safety Research Program Subcommittee Meeting on 980717 in Rockville,Md Re Comments & Recommendations in 980616 ACRS Rept, Core Research Capabilities & Associated Staff Response ML20206S3721998-07-29029 July 1998 Summary of 980707 ACRS Advanced Reactor Designs Subcommittee Meeting in Rockville,Md Re Info on AP600 Test & Analysis Program & Responses to ACRS Questions Asked During Previous Meetings ML20206S6721998-07-0808 July 1998 Summary of ACRS Safety Research Program Subcommittee 980601 Meeting in Rockville,Md Re Discussion with NRC Concerning SECY-98-076, Core Research Capabilities ML20206S3671998-06-30030 June 1998 Summary of 980619 Open ACRS Meeting of Subcommittee on Plant Operations in Rockville,Md Re Proposed Changes to 10CFR50.59,status of Resolution of Issues Identified in 980324 SRM Related to SECY-97-205 & Related Matters ML20206S3501998-06-26026 June 1998 Summary of 980617-18 ACRS Advanced Reactor Designs Subcommittee Meeting in Rockville,Md Re Review of Advance FSER Chapters 4,5,7,8,11,13 & 18,level 1 AP600 Pra,Itaac & Associated ACRS Open Questions ML20206S5991998-06-23023 June 1998 Summary of ACRS Reactor Fuels,Onsite Fuel Storage & Decommissioning Subcommittee 980423-24 Meeting in Rockville, MD Re Basis of Proposed NRC Fuel Failure Criterion for High Burnup Conditions & Adequacy of NRC Fuel Codes ML20206S3361998-06-22022 June 1998 Summary of 980611-12 Open ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommittee Meeting in Rockville,Md Re Continuance of Review of Results of W Test & Analysis Program in Support of AP600 Design Certification ML20206S6411998-06-22022 June 1998 Summary of 980601 ACRS Matls & Metallurgy Subcommittee Meeting in Rockville,Md Re NRC Staff Concerns Related to ASME Boiler & Pressure Vessel Code,Section III Rule Revs ML20206S2561998-06-17017 June 1998 Summary of 452nd ACRS Meeting on 980430-0502 in Rockville, MD Re Items Listed in Attached Agenda ML20206S6301998-06-17017 June 1998 Summary of 980602 ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommitteemeeting in Rockville,Md Re GE Extended Power Uprate Program for Operating BWRs & NSP lead-plant Application for Power Uprate ML20206S5761998-06-0404 June 1998 Summary of ACRS Reliability & Probabilistic Risk Assessment Subcommittee 980416 Meeting in Rockville,Md Re Subcommittees Review of Matters Related to Elevation of CDF & Possible Rev to Commissions Safety Goal Policy Statement ML20206S5671998-05-30030 May 1998 Summary of ACRS Advanced Reactor Designs Subcommittee 980513-15 Meeting in Rockville,Md Re Review of AP600 Standard SAR & Associated Advanced FSER Chapters 3,6,14,16 & 17 ML20206S2521998-05-14014 May 1998 Summary of 451st ACRS Meeting on 980402-04 in Rockville,Md Re Items Listed in Attached Agenda ML20206S2801998-04-30030 April 1998 Summary of 980219-20 ACRS Open Meeting of Subcommittee on Reliability & Probabilistic Risk Assessment in Rockville,Md Re Continuance of Review of Proposed Final SRP Sections & RGs for risk-informed,performance-based Regulation ML20206S2951998-04-15015 April 1998 Summary of 450th ACRS Meeting on 980305-07 in Rockville,Md Re Items Listed in Attached Agenda ML20206S2871998-04-15015 April 1998 Summary of 449th ACRS Meeting on 980302-04 in Rockville,Md Re Items Listed in Attached Agenda ML20206S6481998-03-26026 March 1998 Summary of ACRS Fire Protection Subcommittee 980122 Meeting in Rockville,Md Re Staff Actions Taken Related to Development of Revised Fire Protection Rule ML20196L0531998-03-20020 March 1998 Summary of 980205-07 ACRS 448th Meeting in Rockville,Md Re Items Listed in Attached Agenda ML20206S6561998-03-13013 March 1998 Summary of ACRS Plant License Renewal Subcommittee 980123 Meeting in Rockville,Md Re License Renewal Implementation Issues & Proposed Industry Guidelines ML20206S2751998-03-0909 March 1998 Summary of 980218 ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommittee Open Meeting in Rockville,Md Re Review of RES Program in Area of thermal-hydraulic Phenomena in Support of ACRS Planned Rept to Commission ML20217A8561998-03-0505 March 1998 Summary of ACRS 448th Meeting on 980205-07 Re Several Matters & Completed Listed Rept & Ltr.Committee Authorized Larkins,Executive Director,To Transmit Memoranda Listed ML20206S6791998-03-0505 March 1998 Summary of ACRS Plant Operations Subcommittee 980203 Meeting in Rockville,Md Re Subcommittee Review of Proposed Improvements to Senior Mgt Meeting Process ML20206S2651998-02-23023 February 1998 Summary of 980203-04 ACRS Subcommittee on Advanced Reactor Designs Open Meeting in Rockville,Md Re Review of Chapters 1,4,5,7,8,11,13 & 18 of AP600 Ssar & AP600 Test & Analysis Program IR 07100203/20064471998-02-0505 February 1998 Summary of 971203-06 447th ACRS Meeting in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda ML20206S3931998-01-28028 January 1998 Summary of 980121 ACRS Subcommitee on Human Factors Meeting in Rockville,Md Re Human Performance & Reliability Plan & Integration of Human Factors Insights Into Insp Process ML20217A8461998-01-0909 January 1998 Summary of ACRS Plant Operations Subcommittee 971202 Meeting in Rockville,Md Re SER on industry-sponsored Utility Resolution Guidance for Issue of Blockage of Suction Strainer in ECCS ML20217A8771997-12-23023 December 1997 Summary of ACRS 446th Meeting on 971106-07 in Rockville,Md Re Appropriate Action on Items Listed on Attached Agenda.W/ Fr Notice,Meeting Schedule & Outline,List of Attendees, Future Agenda & List of Documents Provided to Committee ML20217A9911997-12-23023 December 1997 Summary of 447th ACRS Meeting on 971203-06 Re Proposed Revs to 10CFR50.59 & Credit for Containment Overpressure to Provide Assurance of Sufficient Net Positive Suction Head for ECC & Containment Heat Removal ML20217A8651997-12-15015 December 1997 Summary of ACRS Reliability & PRA Subcommittee 971112-13 Meeting in Rockville,Md Re Proposed Final SRP for risk- informed,performance-based Regulation ML20217A9831997-12-0303 December 1997 Summary of 971203 ACRS Meeting in Rockville,Md Re Conduct of ACRS Business ML20217A5901997-12-0202 December 1997 Summary of 445th ACRS Meeting in Rockville,Md on 971002-03 Re Appropriate Action on Items Listed in Attached Agenda.W/ Fr Notice,Meeting Schedule & Outline,List of Attendees, Future Agenda & List of Documents Provided to Committee ML20217A8811997-12-0202 December 1997 Summary of ACRS Safety Research Program Subcommittee 971104- 05 Meeting in Rockville,Md Re NRC Safety Research Program & Draft Annual Rept to Congress ML20217A8221997-12-0101 December 1997 Informs That During 446th Meeting on 971106-07,ACRS Discussed Several Matters & Completed Listed Ltr. Committee Authorized Larkins,Executive Director,To Transmit Memoranda,Listed ML20217A8901997-11-21021 November 1997 Summary of ACRS Reliability & PRA 971021-22 Meeting in Rockville,Md Re Matter Included in Staff Requirements Memo, ML20217A6381997-11-0606 November 1997 Summary of 444th ACRS Meeting in Rockville,Md on 970903-05 Re Appropriate Action Items Listed in Attached Agenda.W/Fr Notice,Meeting Schedule & Outline,List of Attendees & List of Documents Provided to Committee ML20217B1921997-11-0606 November 1997 Summary of ACRS Planning & Procedures Subcommitte 971105 Meeting in Rockville,Md Re Conduct of ACRS Business ML20217A8001997-10-21021 October 1997 Informs That During 445th Meeting on 971002-03,ACRS Discussed Several Matters & Completed Listed Rept & Ltrs. Committee Authorized Larkins,Executive Director,To Transmit Memoranda Listed ML20217A7011997-10-20020 October 1997 Summary of 970826-27 ACRS Subcommittees on Matls & Metallurgy & on Severe Accidents Joint Meeting W/Nrc,Nei & Industry in Rockville,Md Re Review of Proposed Draft GL & Associated Draft Regulatory Guide Re SG Tube Integrity ML20217A8141997-10-20020 October 1997 Summary of ACRS Subcommittees on Pra,Plant Operations & Fire Protection 970828-29 Meeting in Rockville,Md Re Review of Staff Requirements Memo 1999-02-17
[Table view]Some use of "" in your query was not closed by a matching "". Category:MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
MONTHYEARML20206S6461999-02-17017 February 1999 Summary of ACRS Reliability & Probabilistic Risk Assessment, Plant Operations & on Regulatory Policies & Practices Subcommittees 981119-20 Meeting in Rockville,Md Re Options Make 10CFR50 & 10CFR50.59 risk-informed ML20206S4381999-01-25025 January 1999 Summary of 458th ACRS Meeting on 981203-05 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda ML20206S6611999-01-11011 January 1999 Summary of 981215-17 ACRS Thermal Hydraulic Phenomena Subcommittee Meeting in Rockville,Md Re T/H Code Activities/ NRC T/H Research Status ML20206S6101998-12-23023 December 1998 Summary of ACRS Reliability & Probabilistic Risk Assessment Subcommittee 981029 Meeting in Rockville,Md Re Options to Make 10CFR50 risk-informed,NEI Whole Plant Study & Options for Developing risk-informed Approach,Revising 10CFR50.59 ML20206S8501998-11-13013 November 1998 Summary of 456th ACRS Meeting on 980930-1002 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda ML20206S2481998-11-12012 November 1998 Summary of 455th ACRS Meeting on 980902-04 in Rockville,Md Re Items Listed in Attached Agenda ML20206S7621998-11-12012 November 1998 Summary of 980924 ACRS Submommittee on Reliability & PRA Open Meeting in Rockville,Md Re Proposed Options for Developing risk-informed Approach to Revising 10CFR50.59, Options for Broader Changes to 10CFR50 ML20206S4161998-09-29029 September 1998 Summary of 980826 Open ACRS Subcommittee on Reliability & PRA Meeting in Rockville,Md Re Issues in SRM on situation-specific Cases Where PRA Results & Insights Have Improved Existing Regulatory Sys ML20206S3851998-09-0303 September 1998 Summary of 980729 Open ACRS Joint Meeting of Subcommittees on Plant Operations & Fire Protection in Atlanta,Ga Re Region II Activities & Other Items of Mutual Interest, Including Significant Operating Events & Fire Protection ML20206S6831998-09-0101 September 1998 Summary of 453rd ACRS Meeting on 980603-05 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda ML20206S3761998-08-24024 August 1998 Summary of 980716 ACRS Plant License Renewal Subcommittee Meeting in Rockville,Md Re Presentations by & Holding Discussions with NRC Staff Re License Renewal,Proposed Staff Plans & Schedule for Reviewing License Renewal Applications ML20206S3811998-08-0404 August 1998 Summary of ACRS Safety Research Program Subcommittee Meeting on 980717 in Rockville,Md Re Comments & Recommendations in 980616 ACRS Rept, Core Research Capabilities & Associated Staff Response ML20206S3721998-07-29029 July 1998 Summary of 980707 ACRS Advanced Reactor Designs Subcommittee Meeting in Rockville,Md Re Info on AP600 Test & Analysis Program & Responses to ACRS Questions Asked During Previous Meetings ML20206S6721998-07-0808 July 1998 Summary of ACRS Safety Research Program Subcommittee 980601 Meeting in Rockville,Md Re Discussion with NRC Concerning SECY-98-076, Core Research Capabilities ML20206S3671998-06-30030 June 1998 Summary of 980619 Open ACRS Meeting of Subcommittee on Plant Operations in Rockville,Md Re Proposed Changes to 10CFR50.59,status of Resolution of Issues Identified in 980324 SRM Related to SECY-97-205 & Related Matters ML20206S3501998-06-26026 June 1998 Summary of 980617-18 ACRS Advanced Reactor Designs Subcommittee Meeting in Rockville,Md Re Review of Advance FSER Chapters 4,5,7,8,11,13 & 18,level 1 AP600 Pra,Itaac & Associated ACRS Open Questions ML20206S5991998-06-23023 June 1998 Summary of ACRS Reactor Fuels,Onsite Fuel Storage & Decommissioning Subcommittee 980423-24 Meeting in Rockville, MD Re Basis of Proposed NRC Fuel Failure Criterion for High Burnup Conditions & Adequacy of NRC Fuel Codes ML20206S6411998-06-22022 June 1998 Summary of 980601 ACRS Matls & Metallurgy Subcommittee Meeting in Rockville,Md Re NRC Staff Concerns Related to ASME Boiler & Pressure Vessel Code,Section III Rule Revs ML20206S3361998-06-22022 June 1998 Summary of 980611-12 Open ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommittee Meeting in Rockville,Md Re Continuance of Review of Results of W Test & Analysis Program in Support of AP600 Design Certification ML20206S2561998-06-17017 June 1998 Summary of 452nd ACRS Meeting on 980430-0502 in Rockville, MD Re Items Listed in Attached Agenda ML20206S6301998-06-17017 June 1998 Summary of 980602 ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommitteemeeting in Rockville,Md Re GE Extended Power Uprate Program for Operating BWRs & NSP lead-plant Application for Power Uprate ML20206S5761998-06-0404 June 1998 Summary of ACRS Reliability & Probabilistic Risk Assessment Subcommittee 980416 Meeting in Rockville,Md Re Subcommittees Review of Matters Related to Elevation of CDF & Possible Rev to Commissions Safety Goal Policy Statement ML20206S5671998-05-30030 May 1998 Summary of ACRS Advanced Reactor Designs Subcommittee 980513-15 Meeting in Rockville,Md Re Review of AP600 Standard SAR & Associated Advanced FSER Chapters 3,6,14,16 & 17 ML20206S2521998-05-14014 May 1998 Summary of 451st ACRS Meeting on 980402-04 in Rockville,Md Re Items Listed in Attached Agenda ML20206S2801998-04-30030 April 1998 Summary of 980219-20 ACRS Open Meeting of Subcommittee on Reliability & Probabilistic Risk Assessment in Rockville,Md Re Continuance of Review of Proposed Final SRP Sections & RGs for risk-informed,performance-based Regulation ML20206S2871998-04-15015 April 1998 Summary of 449th ACRS Meeting on 980302-04 in Rockville,Md Re Items Listed in Attached Agenda ML20206S2951998-04-15015 April 1998 Summary of 450th ACRS Meeting on 980305-07 in Rockville,Md Re Items Listed in Attached Agenda ML20206S6481998-03-26026 March 1998 Summary of ACRS Fire Protection Subcommittee 980122 Meeting in Rockville,Md Re Staff Actions Taken Related to Development of Revised Fire Protection Rule ML20196L0531998-03-20020 March 1998 Summary of 980205-07 ACRS 448th Meeting in Rockville,Md Re Items Listed in Attached Agenda ML20206S6561998-03-13013 March 1998 Summary of ACRS Plant License Renewal Subcommittee 980123 Meeting in Rockville,Md Re License Renewal Implementation Issues & Proposed Industry Guidelines ML20206S2751998-03-0909 March 1998 Summary of 980218 ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommittee Open Meeting in Rockville,Md Re Review of RES Program in Area of thermal-hydraulic Phenomena in Support of ACRS Planned Rept to Commission ML20217A8561998-03-0505 March 1998 Summary of ACRS 448th Meeting on 980205-07 Re Several Matters & Completed Listed Rept & Ltr.Committee Authorized Larkins,Executive Director,To Transmit Memoranda Listed ML20206S6791998-03-0505 March 1998 Summary of ACRS Plant Operations Subcommittee 980203 Meeting in Rockville,Md Re Subcommittee Review of Proposed Improvements to Senior Mgt Meeting Process ML20206S2651998-02-23023 February 1998 Summary of 980203-04 ACRS Subcommittee on Advanced Reactor Designs Open Meeting in Rockville,Md Re Review of Chapters 1,4,5,7,8,11,13 & 18 of AP600 Ssar & AP600 Test & Analysis Program IR 07100203/20064471998-02-0505 February 1998 Summary of 971203-06 447th ACRS Meeting in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda ML20206S3931998-01-28028 January 1998 Summary of 980121 ACRS Subcommitee on Human Factors Meeting in Rockville,Md Re Human Performance & Reliability Plan & Integration of Human Factors Insights Into Insp Process ML20217A8461998-01-0909 January 1998 Summary of ACRS Plant Operations Subcommittee 971202 Meeting in Rockville,Md Re SER on industry-sponsored Utility Resolution Guidance for Issue of Blockage of Suction Strainer in ECCS ML20217A9911997-12-23023 December 1997 Summary of 447th ACRS Meeting on 971203-06 Re Proposed Revs to 10CFR50.59 & Credit for Containment Overpressure to Provide Assurance of Sufficient Net Positive Suction Head for ECC & Containment Heat Removal ML20217A8771997-12-23023 December 1997 Summary of ACRS 446th Meeting on 971106-07 in Rockville,Md Re Appropriate Action on Items Listed on Attached Agenda.W/ Fr Notice,Meeting Schedule & Outline,List of Attendees, Future Agenda & List of Documents Provided to Committee ML20217A8651997-12-15015 December 1997 Summary of ACRS Reliability & PRA Subcommittee 971112-13 Meeting in Rockville,Md Re Proposed Final SRP for risk- informed,performance-based Regulation ML20217A9831997-12-0303 December 1997 Summary of 971203 ACRS Meeting in Rockville,Md Re Conduct of ACRS Business ML20217A5901997-12-0202 December 1997 Summary of 445th ACRS Meeting in Rockville,Md on 971002-03 Re Appropriate Action on Items Listed in Attached Agenda.W/ Fr Notice,Meeting Schedule & Outline,List of Attendees, Future Agenda & List of Documents Provided to Committee ML20217A8811997-12-0202 December 1997 Summary of ACRS Safety Research Program Subcommittee 971104- 05 Meeting in Rockville,Md Re NRC Safety Research Program & Draft Annual Rept to Congress ML20217A8221997-12-0101 December 1997 Informs That During 446th Meeting on 971106-07,ACRS Discussed Several Matters & Completed Listed Ltr. Committee Authorized Larkins,Executive Director,To Transmit Memoranda,Listed ML20217A8901997-11-21021 November 1997 Summary of ACRS Reliability & PRA 971021-22 Meeting in Rockville,Md Re Matter Included in Staff Requirements Memo, ML20217B1921997-11-0606 November 1997 Summary of ACRS Planning & Procedures Subcommitte 971105 Meeting in Rockville,Md Re Conduct of ACRS Business ML20217A6381997-11-0606 November 1997 Summary of 444th ACRS Meeting in Rockville,Md on 970903-05 Re Appropriate Action Items Listed in Attached Agenda.W/Fr Notice,Meeting Schedule & Outline,List of Attendees & List of Documents Provided to Committee ML20217A8001997-10-21021 October 1997 Informs That During 445th Meeting on 971002-03,ACRS Discussed Several Matters & Completed Listed Rept & Ltrs. Committee Authorized Larkins,Executive Director,To Transmit Memoranda Listed ML20217A7011997-10-20020 October 1997 Summary of 970826-27 ACRS Subcommittees on Matls & Metallurgy & on Severe Accidents Joint Meeting W/Nrc,Nei & Industry in Rockville,Md Re Review of Proposed Draft GL & Associated Draft Regulatory Guide Re SG Tube Integrity ML20217A8141997-10-20020 October 1997 Summary of ACRS Subcommittees on Pra,Plant Operations & Fire Protection 970828-29 Meeting in Rockville,Md Re Review of Staff Requirements Memo 1999-02-17
[Table view]Some use of "" in your query was not closed by a matching "". |
Text
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E 2 ACRS ECCS SUBCOMMITTEE MEETING MINUTES APRIL 3, 1985 WASHINGTON, DC l i
I l
Purpose:
The purpose of the meeting was to discuss: (1) Exxon ECCS Model Errors; (2) the W BART/ BASH ECCS codes; (3) the resolution of TMI Item II.K.3.30
- revision of small break LOCA ECCS Evaluation Models; and, (4) the resolution of the RCP trip issues given a small break LOCA. (Note:
Item 4 was not discussed due to lack of time.)
Attendees: Principal meeting attendees included:
ACRS NRC D. Ward, Chairman R. Jones H. Etherington, Member D. Langford C. Michelson, Member N. Lauben G. Reed, Member S. Sun I. Catton, Consultant J. Guttmann V. Schrock, Consultant E. Throm T. Theofanous, Consultant B. Sheron C. Tien, Consultant P. Boehnert, Staff, DF0 Westinghouse M. Young Babcock & Wilcox W. Tauche J. Paljug Combustion Engineering Louisiana Power & Light
- G. Menzel J. Holman Meeting Highlights, Agreements and Requests -
- 1. R. Jones detailed the problems NRC has been having with the Exxon LOCA analyses. The problems include code and input errors, concern 8505240172 850410 PDR ACRS PDR t,1. ED 021GIlilL 2299 L2.
Certified By hb .
ECCS Meeting Minutes April 3, 1985 i
over use of certain factors in the heat transfer calculations and l the validity of using the H K(Z) curve (defines allowable core '
peaking factor as a function of core elevation) in the ENC model.
(Exxon assumed the E K(Z) curve applied to ENC fuel). The K(Z) error is significant in that it can impact power operations (derates,etc.). The Ginna and Kewaunee plants require immediate Staff action in order to allow start-up from refueling. In response to Mr. Etherington, Mr. Jones said there are some problems with LOCA analyses for mixed fuel cores, i.e., the T/H analysis is not a straight-forward set of affairs.
The Staff is still wrestling with the overall problem of assuring compliance with Appendix K in a manner that will not unfairly penalize the affected licensees. One action under consideration would be to grant a temporary exemption to Appendix K requirements to allow timely start-up of the above noted plants. The Subcommittee requested that NRR keep it informed regarding progress to resolution of this issue.
An ENC representative (J. Owsley) made a brief statement describing ENC's efforts to resolve the above concerns.
Dr. Sheron noted that E has recently discovered an error in their ECCS EM that results in a PCT penalty of M 80'F. Because of the code used in the analysis (BART), only a few y plants are affected.
Upon reanalysis, none of the affected plants exceed 2200 F PCT.
- 2. The y BART/ BASH EM code models were described by Mr. Young of Westinghouse. BART replaces the FLECHT correlation and the steam cooling model in the y EM. Figure 1 lists the principal features of the BART code. NRC has reviewed and approved BART for use in LOCA calculations.
7 ECCS Meeting Minutes April 3,1985 The BASH code is proposed for the y EM in order to eliminate the current inconsistency between BART and the E REFLOOD code calculated entrainment rate. BASH is a combination of the BART and NOTRUMP codes. NOTRUMP models the loop thermal hydraulics outside the core. BASH is a 1-D code designed to improve modeling of the reflood portion of the LB LOCA. Comparison of-BASH code calculations with applicable reflood data (Figure 2) shows that the code outputs tend to give oscillations (Figure 3). This issue is under discussion with the NRC Staff as part of the on-going acceptance review. Overall, the code results are conservative with respect to the test data.
- 3. S. Sun (NRC) overviewed the NRC review and approval of the BART code. The original BART code was approved in December 1983.
Subsequently, improvements to the code and its use in different plant types (UHI) has been approved or review is on-going (Figure 4). Dr. Catton suggested that comparisons De made between BART and TRAC code calculations.
D. Langford provided the status of the NRC review of the BASH code.
The Staff review required verification of BART/NOTRUMP (the BASH code components) for the regimes of interest for EM conditions.
Review tasks remaining include: (1) y explanation of large reflood oscillations noted above, (2) E documentation and formal submittals, (3) retiew of new NOTRUMP materials (i.e., revisions to the code) and (4) review of new and revised BASH submittals. An SER for BASH is targeted for late August 1985.
Additional discussion brougtit out the fact that N50% of the ~
Appendix K margin is at the discretion of the NRC Staff, i.e., only 50% of the margin is tied up in the Appendix K features.
l l
l
1 i.
. ECCS Meeting Minutes April 3, 1985 Mr. Ward questioned NRR's review practices vis-a-vis competence of users of the LOCA codes. NRR indicated much of their confidence in the licensees code capabilities rests on their track record.
, Initially, NRR will perform audit calculations.
4.. 'W. Tauche (g) discus,ed the development of the NOTRUMP code to meet the TMI II.K.3.30 recuirenent to revise the SB LOCA EM codes. In the wake of the II.K.3.30 requirements, E decided to develop a new l
BE code. Figures 5 i.nd 6 outline the NOTRUMP features. gcompared NOTRUMP calculations to four LOFT and one Semiscale SB LOCA tests.
Results shown indicate good agreement with data, t
!' J.'Guttmann (NRC) detailed the NRC's review of the g NOTRUMP code to meet the II.K.3.30 requirements. NRC had six action items in their review (Figures 7-8). The code was found acceptable for use
- provided the phenomena of core water level depression seen prior
! to loop seal clearing in the Semiscale S-UT-08 tests is adequately modeled in follow-on work. Follow-on tests of this phenomena are planned in Semiscale and ROSA-IV. g will be required to confinn the capability of NOTRUMP to predict the test results if the follow-on tests show significant PCTs during pre-loop seal clearing.; It was noted that both TRAC and RELAP were initially unable t7 calculate this phenomenon. This observation caused some expressWns of concern among the Subcomittee consultants.
?
- 5. The CE presentation on the II.K.3.30 issue was given by J. Holman and G. Menzel. CE's approach to resolution of this issue was to
. justify the adequacy of the existing apprnved SB LOCA EM. The EM was compared with test data and sensitivity studies. Figure 9 .
outlines the technical concerns and resolution effort. Regarding the steam generator model and verification of the Semiscale i phenomenon noted above, CE will do a post-test analysis of the
- S-UT-08 Semiscale test.
i
- ~.- . . . _ . - _ _ . . _ . _ _ _ _ . - - _ _ _ . _ _ _ _ _ . . _ - _ - _ , _ _ - _ _ . _ - - ,
ECCS Meeting Minutes April 3, 1985
.NRC's review of the CE SB LOCA model revision effort was detailed by J. Guttmann. Figure 10 lists the NRC action items for its review. NRC found the CE LOCA EM acceptable but, like W, the e
acceptability is conditioned on CE's successful analysis of the Semiscale S-UT-08 test data vis-a-vis the pre-loop-seal-clearing core level depression phenomena.
During discussion of the details of the CE SB EM, the Consultants repeatedly noted that several of the correlations used were quite dated and while they may produce conservative results, the vendor should use more current or physically correct correlations in their models. In response to Mr. Ward, Mr. Guttman indicated that the S-UT-08 phenomena is believed to be typical and was seen at LOFT after very close examination of SB test data.
- 6. J. Paljug discussed the B&W resolution effort for II.K.3.30. As with CE, B&W decided to justify use of their existing SB LOCA EM.
Figure 11 outlines the II.K.3.30 issues for the B&W EM. B&W noted that the Owners Group commitment to analyses of the MIST integral system test data will be applied to this issue.
NRR's review of the B&W SB LOCA reanalysis effort was discussed by E. Throm. NRR finds the B&W EM acceptable but is requiring confirmatory analysis using the CRAFT-2 EM code against the MIST /0 TIS data. In response to Mr. Ward, Mr. Throm said there are no near-term requirements for CRAFT-2 comparisons against currently available GERDA/0 TIS test data. Mr. Ward was disturbed with this situation. Mr. Lauben (NRR) indicated that the MIST data is most applicable to the Semiscale test (i.e., is the most challenging to .
the code). B&W said the OTIS data will be applied to code development for the MIST test analyses. The B&W Owners Group has )
committeed to some form of verification of the SB EM based on the results of the OTIS/ MIST integral test program (Figure 12).
ECCS Meeting Minutes April 3, 1985 Mr. Ward expressed concern with the overall NRR approach to the II.K.3.30 review. He said he doesn't see any effort to develop a BE approach to SB LOCA modeling vis-a-vis emergency procedure I guideline development. It appears to be a strictly legalistic approach, i.e., models are conservative therefore they-are acceptable. After further dicussion, Mr. Lauben said he would follow-up on this as an action item for future response.
- 7. The meeting was adjourned at 6:00 p.m.
NOTE: Additional meeting details can be obtained from a transcript of this meeting available in the NRC Public Document Room, 1717 H Street, N.W., Washington, D.C., or one can be purchased from ACE-Federal Reports, 444 North Capitol Street, Washington, DC 20001(202)347-3700.
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CODE FEATURES -
e CONSTANT PRESSURE e NON-EQUILIBRIUM BETWEEN VAPOR AND LIQUID
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SYSTEM EFFECTS REFLOOD TESTS FOR ADDITIONAL BASH VERIFICATION Test Range of Parameters Congnents 1
Pressure initial
- Initial Peak (osia) Peak Temo (*F) Power (kw/f t)
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parameters avg: 1000-1300 .4 .5
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CODES REVIEW STATUS COMPLETED AND APPROVED
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HEAT TRANSFER MODEL
- 3. 3 ART APPLICATION TO COMPLETED AND APPROVED (FEBRUARY 25,1985)
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AND 2-PHASE DISCHARGE COEFFICIENTS -
o CONDENSATION HEAT TRANSFER DESCRIPTION OF EXISTING METHODOLOGY IN IN SG AND NON CONDENSIBLE GASES CEFLASH-4AS o FLOW REGIME EFFECT ON SENSITIVITY STUDIES WITH PRESSURE DROP IN SG FLOW REGIMES o SG MODELING, PARTICULARLY WITH DESCRIPTION OF SG MODEL IN RESPECT TO SPIKE-LIKE CORE CEFLASH-4AS AND ITS CAPABILITY:
UNC0VERY OBSERVED IN S-UT-8 ANALYSIS OF S-UT-8 IN PROGRESS, e'
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l NUREG-0737, Section II.K.3.30 Issues a SBLOCA methods evaluation for LOFT S SEMISCALE test data
. o NUREG-0565 Natural Circulation Pressurizer & Surge Line Core level & heat transfer Modeling detail ECC Injection NCGINolv-'""0'k8'E 60'
o Other concerns Two Phase flow effects Leak Discharge Model o ISTd/?t>SD sc7)
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. - . . - - . . - . . - - . . . - . , _ . - - . . . - . . . . . - - - - _ , - _ . . - - - , . _ - - . , . b* N
B&WOG MODEL REVIEW
- 5. Systems Verification / Test Data
! Confirmatory Committments January 3,1985 OG Letter
- a. Benchmark CRAFT 2 to OT
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- b. Best Estimate CRAFT 2 to verified RELAP5/ MOD 2[
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- c. Appendix K CRAFT 2 to verified RELAP5/ MOD 2 t
ACRS kpril 3,1985 E.D.Throm,NRR/DSI/RSB l
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