Revised Testimony of Gc Klopp on Contentions 39 & 109 Re Likelihood of Core Melt Accident Leading to Radioactive Contaminant Release to GroundwaterML20069H705 |
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Byron |
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04/04/1983 |
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Klopp G COMMONWEALTH EDISON CO. |
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ML20069H668 |
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ISSUANCES-OL, NUDOCS 8304060331 |
Download: ML20069H705 (15) |
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Category:LEGAL TRANSCRIPTS & ORDERS & PLEADINGS
MONTHYEARML20207E0051999-03-0202 March 1999 Transcript of 990302 Public Meeting with Commonwealth Edison in Rockville,Md.Pp 1-104.Supporting Documentation Encl ML20236H9381998-06-30030 June 1998 Transcript of 980630 Meeting W/Commonwealth Edison in Rockville,Md.Pp 1-123.Supporting Documentation Encl ML20198P3001997-11-0404 November 1997 Transcript of 971104 Public Meeting W/Ceco in Rockville,Md Re Measures Established by Ceco to Track Plant Performance & to Gain Understanding of CAs Put Into Place to Improve Safety.Pp 1-105.W/Certificate & Viewgraphs ML20149M2951996-11-29029 November 1996 Exemption from Requirements of 10CFR50.60 Re Safety Margins Recommended in ASME Boiler & Pressure Vessel Code Case N-514 TXX-9522, Comment Opposing Proposed GL on Testing of safety-related Logic Circuits.Believes That Complete Technical Review of All Surveillance Procedures Would Be Expensive & Unnecessary Expenditure of Licensee Resources1995-08-26026 August 1995 Comment Opposing Proposed GL on Testing of safety-related Logic Circuits.Believes That Complete Technical Review of All Surveillance Procedures Would Be Expensive & Unnecessary Expenditure of Licensee Resources ML20059C2351993-12-17017 December 1993 Comment Supporting Petition for Rulemaking PRM-21-2 Re Commercial Grade Item Dedication ML20044A8111990-06-27027 June 1990 Comment Opposing Closure of Lpdr of Rockford Public Library ML20245J0191989-04-14014 April 1989 Comment Re Proposed Rule 10CFR50 Re Ensuring Effectiveness of Maint Programs for Nuclear Power Plants ML20214X1871987-06-11011 June 1987 Order Imposing Civil Monetary Penalty in Amount of $25,000 Based on Four Severity Level III Violations Noted During 860721-0808 Insp ML20205Q1711987-04-0202 April 1987 Order Imposing Civil Monetary Penalty in Amount of $25,000. App Re Evaluations & Conclusions Encl IR 05000812/20100311987-02-26026 February 1987 Order Imposing Civil Monetary Penalty in Amount of $100,000 Based on Violations Noted During Insps on 850812-1031 ML20210T7321987-02-11011 February 1987 Unexecuted Amend 6 to Indemnity Agreement B-97 Substituting Item 3 of Attachment to Indemnity Agreement in Entirety W/ Listed License Numbers,Effective 870130 ML20209J3251987-01-30030 January 1987 Transcript of 870130 Commission Discussion/Possible Vote on Full Power OL for Facility.Pp 1-72.Supporting Viewgraphs Encl ML20213G4381986-10-24024 October 1986 Unexecuted Amend 5 to Indemnity Agreement B-97,substituting Item 3 of Attachment to Agreement in Entirety W/Listed License Numbers,Effective on 861106 ML20211B0841986-08-0505 August 1986 Transcript of 860805 Meeting Between Region Iii,Computer Interference Elimination & Util in Redmond,Wa Re Plant as-built Drawing Review.Pp 1-200 IR 05000506/20070221986-05-0202 May 1986 Order Imposing Civil Monetary Penalty in Amount of $25,000 for Violations Noted During Insp on 850506-0722.Violations Noted:Failure to Establish Radiological Safety Procedures & to Adequately Train Personnel ML20138C7301985-12-0909 December 1985 Order Imposing Civil Penalty in Amount of $25,000 Per 850606 Notice of Violation & Proposed Imposition of Civil Penalty.Licensee May Request Hearing within 30 Days of Date of Order ML20205E8741985-10-28028 October 1985 Exemption from GDC 4 of 10CFR50,App a Requirement to Install Protective Devices Associated W/Postulated Pipe Breaks Primary Coolant Sys.Topical Rept Evaluation Encl ML20102A2981985-01-0707 January 1985 Petition Requesting Aslab Grant Intervenor Appeal & Order Further Hearings on Safety of Plant ML20099L2581984-11-27027 November 1984 Notice of Withdrawal of Appearance in Proceeding.Certificate of Svc Encl ML20099G5381984-11-23023 November 1984 Supplemental Appeal Brief in Response to Intervenor 841106 Supplemental Brief on Appeal & in Support of ASLB 841016 Supplemental Initial Decision Authorizing Issuance of Ol. Certificate of Svc Encl ML20100K0411984-11-22022 November 1984 Submits Concerns Re Safety of Local Residents in Event of Accident & Excessively High Cost of Projected Operation of Facility ML20107H7841984-11-0606 November 1984 Supplemental Brief on Appeal of ASLB 841016 Supplemental Initial Decision Granting Authority for Issuance of Ol. Decision Should Be Reversed.Certificate of Svc Encl ML20140E4081984-10-31031 October 1984 Executed Amend 1 to Indemnity Agreement B-97,deleting Items 2A & 3 in Entirety ML20098G8841984-10-0202 October 1984 Joint Statement of RW Manz & W Faires Re Findings 3-11 Through 3-17 of NRC 830930 Integrated Design Insp Rept. Certificate of Svc Encl ML20098G8681984-10-0202 October 1984 Answer to Intervenor Motion to Reopen Record Re Bechtel Independent Design Review.Motion Should Be Denied ML20098G8901984-10-0202 October 1984 Joint Statement of Kj Green & RW Hooks Re Integrated Design Insp ML20098G8911984-10-0202 October 1984 Joint Statement of Cw Dick & EM Hughes Re Independent Design Insp ML20098G8821984-10-0101 October 1984 Affidavit of Kj Green Re Integrated Design Insp Concerning Mechanical Engineering Work ML20098G8741984-10-0101 October 1984 Affidavit of Br Shelton Re Integrated Design Insp ML20098G8881984-09-29029 September 1984 Affidavit of RW Hooks Re Integrated Design Insp Concerning Structural Design ML20098G8831984-09-28028 September 1984 Affidavit of W Faires Re Findings 3-15 & 3-16 of NRC 830930 Integrated Design Insp Rept ML20098G8811984-09-28028 September 1984 Affidavit of Cw Dick Re Independent Design Review ML20098G8791984-09-28028 September 1984 Affidavit of RP Tuetken Re Readiness for Fuel Loading ML20098G8781984-09-28028 September 1984 Affidavit of RW Manz Concerning Findings 3-11 Through 3-14 & 3-17 of NRC 830930 Integrated Design Insp Re Westinghouse ML20098G8871984-09-28028 September 1984 Affidavit of EM Hughes Re Idvp ML20098G8851984-09-27027 September 1984 Affidavit of Rl Heumann Re Costs of Delay in Startup & Operation of Unit 1 ML20098E2371984-09-24024 September 1984 Reply to Intervenor 840918 Proposed Supplemental Initial Decision.Certificate of Svc Encl ML20097E7221984-09-13013 September 1984 Agreed Motion for Time Extension Until 841101 to File Petition for Hearing Re Emergency Planning Commitment W ML20097C5311984-09-12012 September 1984 Motion to Reopen Record to Include Plant Design as Issue. Supporting Documentation & Certificate of Svc Encl ML20097B7791984-09-10010 September 1984 Proposed Supplemental Initial Decision Re Reinsp Program. Certificate of Svc Encl ML20096A6391984-08-30030 August 1984 Rebuttal Testimony of RW Hooks Re Validity of Info in Attachment 7 to Stokes Testimony Concerning Design Assumption for Plant.Stokes Info Inapplicable to Plant. Related Correspondence ML20096A6191984-08-30030 August 1984 Rebuttal Testimony of B Erler Re Stokes Allegations Concerning Evaluations of Discrepancies in Calculated Actual Stress Performed by Sargent & Lundy.Related Correspondence ML20096A6261984-08-30030 August 1984 Summary of Rebuttal Testimony & Testimony of ML Somsag, Eb Branch,D Demoss,Mr Frankel,Bf Maurer & Jk Buchanan Re Plant QC Inspector Reinsp Program & C Stokes Allegations Re Welds.Related Correspondence ML20096A6441984-08-28028 August 1984 Notice of Withdrawal of Appearance in Proceeding.Related Correspondence ML20112D5271984-08-24024 August 1984 Applicant Exhibit A-R-4,consisting of Feb 1984 Rept on Bryon QC Inspector Reinsp Program ML20112D5031984-08-24024 August 1984 Applicant Exhibit A-R-5,consisting of June 1984 Suppl to Rept on Bryon QC Inspector Reinsp Program ML20112D7441984-08-23023 August 1984 Intervenor Exhibit I-R-1,consisting of Undated List of Teutken Safety Category Insp Types ML20112D7511984-08-21021 August 1984 Staff Exhibit S-R-1,consisting of 840813 Instruction for Walkdown of Cable Tray Hanger Connection Welds ML20112D4641984-08-21021 August 1984 Intervenor Exhibit I-R-11,consisting of Undated Chronological Date Listing of Util Responses to Interrogatory 12.VA Judson to Mi Miller Re Interrogatory 12 & Supplemental Responses Encl 1999-03-02
[Table view] Category:TRANSCRIPTS
MONTHYEARML20207E0051999-03-0202 March 1999 Transcript of 990302 Public Meeting with Commonwealth Edison in Rockville,Md.Pp 1-104.Supporting Documentation Encl ML20236H9381998-06-30030 June 1998 Transcript of 980630 Meeting W/Commonwealth Edison in Rockville,Md.Pp 1-123.Supporting Documentation Encl ML20198P3001997-11-0404 November 1997 Transcript of 971104 Public Meeting W/Ceco in Rockville,Md Re Measures Established by Ceco to Track Plant Performance & to Gain Understanding of CAs Put Into Place to Improve Safety.Pp 1-105.W/Certificate & Viewgraphs ML20209J3251987-01-30030 January 1987 Transcript of 870130 Commission Discussion/Possible Vote on Full Power OL for Facility.Pp 1-72.Supporting Viewgraphs Encl ML20211B0841986-08-0505 August 1986 Transcript of 860805 Meeting Between Region Iii,Computer Interference Elimination & Util in Redmond,Wa Re Plant as-built Drawing Review.Pp 1-200 ML20096A6261984-08-30030 August 1984 Summary of Rebuttal Testimony & Testimony of ML Somsag, Eb Branch,D Demoss,Mr Frankel,Bf Maurer & Jk Buchanan Re Plant QC Inspector Reinsp Program & C Stokes Allegations Re Welds.Related Correspondence ML20096A6191984-08-30030 August 1984 Rebuttal Testimony of B Erler Re Stokes Allegations Concerning Evaluations of Discrepancies in Calculated Actual Stress Performed by Sargent & Lundy.Related Correspondence ML20096A6391984-08-30030 August 1984 Rebuttal Testimony of RW Hooks Re Validity of Info in Attachment 7 to Stokes Testimony Concerning Design Assumption for Plant.Stokes Info Inapplicable to Plant. Related Correspondence ML20094P7721984-08-17017 August 1984 Summary of Testimony & Direct Testimony of CC Stokes on Reinsp Program.Related Correspondence ML20094R1021984-08-17017 August 1984 Transcript of CC Stokes 840817 Deposition in Chicago,Il. Pp 1-173.Vol Ii.Related Correspondence ML20094P5991984-08-16016 August 1984 Direct Testimony of CC Stokes Re Engineering Evaluations Performed & Use of Engineering Judgement by Sargent & Lundy. Suggests Need for Independent Engineering Analysis of Safety Significance of Reinsp Program.Related Correspondence ML20094P6311984-08-14014 August 1984 Summary of Testimony & Testimony of Ds Kochhar on Contention 1 Re Reinsp Program.Certificate of Svc Encl.Related Correspondence ML20094P6831984-08-13013 August 1984 Summary of Testimony & Testimony of Wh Bleuel on Contention 1 Re Reinsp Program.Resume Encl.Related Correspondence ML20094P6951984-08-13013 August 1984 Summary of Testimony & Testimony of EP Erickson on Contention 1 Re Reinsp program-inspector Qualification & Work Quality.Resume & Certificate of Svc Encl.Related Correspondence ML20093L4881984-07-30030 July 1984 Summary of Testimony & Testimony of Eb Branch Re Contention 1 (Reinsp Program,Work Quality).Related Correspondence ML20093L1811984-07-30030 July 1984 Summary of Testimony & Testimony of KT Kostal on Contention 1 Re Capacity of Sys Control Corp Supplied Components to Carry Design Loads.Related Correspondence ML20093L2721984-07-30030 July 1984 Summary of Testimony & Testimony of Ak Singh on Contention 1 Re Evaluations of Discrepancies in Cable Tray Hanger Connections,Solid Bottom Tray Welds & Ladder Tray Weld Connections.Related Correspondence ML20093L2051984-07-30030 July 1984 Summary of Testimony & Testimony of Ld Johnson on Contention 1 Re Adequacy of Sys Control Corp Supplied Main Control Boards.Related Correspondence ML20090E5521984-07-17017 July 1984 Testimony of Eb Branch Re Job Responsibilities,Educ Background & Work Experience.Related Correspondence ML20090A7981984-07-0909 July 1984 Testimony of Gf Marcus Re Pittsburgh Testing Lab Source Insp of Equipment & Components Supplied by Sys Control Corp ML20090A8121984-07-0909 July 1984 Testimony of Bf Maurer Re Analysis of Structural Adequacy of Main Control Panels Designed & Fabricated by Sys Control Corp ML20092P7921984-07-0202 July 1984 Summary of Testimony & Testimony of ML Somsag Re QA Inspector Reinsp Program for Hunter Corp.Related Correspondence ML20092P7891984-07-0202 July 1984 Summary of Testimony & Testimony of Rv Laney on Contention 1 Re Work Quality.Related Correspondence ML20092P7951984-07-0202 July 1984 Summary of Testimony & Testimony of Ak Singh on Contention 1 Re Reinsp Program,Work Quality.Related Correspondence ML20092P7941984-07-0202 July 1984 Summary of Testimony & Testimony of LO Delgeorge on Contention 1 Re Reinsp Program,Inspector Qualification & Work Quality.Related Correspondence ML20092P5541984-07-0202 July 1984 Summary of Testimony & Testimony of Dl Leone on Contention 1 Re Reinsp Program for Work Quality ML20092P5551984-07-0202 July 1984 Summary of Testimony & Testimony of R French on Contention 1 Re Reinsp Program ML20092P7781984-07-0202 July 1984 Summary of Testimony & Testimony of Wj Shewski on Contention 1 Re Reinsp Program,Inspector Qualification.Related Correspondence ML20092P7811984-07-0202 July 1984 Summary of Testimony & Testimony of Jm Mclaughlin on Contention 1 Re Reinsp Program,Work Quality.Related Correspondence ML20092P7871984-07-0202 July 1984 Summary of Direct Testimony & Testimony of RP Tuetken Re Reinsp Program.Related Correspondence ML20092P7851984-07-0202 July 1984 Summary of Testimony & Testimony of Wb Behnke on Contention 1 Re Overview of Quality Program,Work Quality. Related Correspondence ML20092N4971984-06-29029 June 1984 Testimony of Bg Treece on Issues 5 & 6 Re Cable Overtensioning,As Limited by ASLB 840608 Order.Related Correspondence ML20092N4911984-06-29029 June 1984 Summary of Direct Testimony of Jo Binder on Issues 5 & 6 Re Cable Overtensioning,As Limited by ASLB 840608 Order.Related Correspondence ML20092K7691984-06-26026 June 1984 Summary of Testimony of J Hansel on Contention 1 Re Reinsp Program.Prof Qualifications Encl.Related Correspondence ML20205H8901983-08-10010 August 1983 Public Version of Transcript of 830810 in Camera,Ex Parte Hearing in Rockford,Il.Pp 7,585-7,610 ML20205H8941983-08-10010 August 1983 Public Version of Transcript of 830810 in Camera,Ex Parte Hearing W/Ofc of Investigations in Rockford,Il.Pp 7,611.1- 7,611.71 ML20205H8841983-08-0909 August 1983 Public Version of Transcript of 830809 in Camera,Ex Parte Hearing in Rockford,Il.Pp 7,304-7,405 ML20080B3051983-08-0303 August 1983 Testimony of RP Tuetken Re Util Reinsp Program of Work Performed by Contractor Insp Personnel Prior to NRC Region III Mar,Apr & May 1982 Insps.Appropriate Steps Taken to Remedy Problems ML20080B3091983-08-0303 August 1983 Testimony of Aw Koca Re General Nature of Hatfield Inspector Training & Certification Program.Certification of J Hughes Described ML20080B2951983-08-0303 August 1983 Testimony of Ma Stanish Re Recertification of Qa/Qc Inspectors Subsequent to NRC Region III Mar,Apr & May 1982 Special Team Insps.Reinsp Program Implemented to Review Work Performed by Inspectors Before NRC 1982 Insp ML20023C7151983-05-12012 May 1983 Testimony of P Holmbeck Re Investigation Into Adequacy of Emergency Plans Re Emergency Planning Contentions.Util Made No Attempt to Study Protective Value of Sheltering Populations Around Plant ML20204F5721983-04-26026 April 1983 Transcript of 830426 Hearing in Rockford,Il.Pp 5,964-6,156 ML20069M4791983-04-25025 April 1983 Handwritten Testimony of J Hughes Re Qa/Qc at Facility ML20069K5691983-04-21021 April 1983 Testimony of Ld Butterfield Re Steam Generator Tube Integrity.Proposed Steam Generator Mods Would Minimize Tube Wear Due to Flow Induced Vibration.Related Correspondence ML20069K5631983-04-21021 April 1983 Revised Testimony of Tf Timmons Re Steam Generator Tube Integrity (Flow Induced Vibration Phenomenon).No Significant Tube Wear Will Be Experienced in Steam Generators Due to Flow Induced Vibration.Related Correspondence ML20073J6691983-04-18018 April 1983 Testimony of Jl Murphy on Rockford League of Women Voters & Dekalb Area Alliance for Responsible Energy/Sinnissippi Alliance for Environ Consolidated Emergency Planning Contentions 3 & 13.Related Correspondence ML20073K4461983-04-18018 April 1983 Rebuttal Testimony of Levine Re Rockford League of Women Voters Contentions 8 & 62 & Dekalb Area Alliance for Responsible Energy/Sinnissippi Alliance for Environ Contention 2a on Public Risk.Related Correspondence ML20073G4241983-04-11011 April 1983 Testimony of Ee Jones Re State of Il Emergency Svc & Disaster Agency Responsibilities Concerning Emergency Planning for Nuclear Facilities & Intervenor Amended Emergency Planning Contention ML20073G4051983-04-11011 April 1983 Testimony of Jc Golden Re Amended Emergency Planning Contention ML20073G4121983-04-11011 April 1983 Testimony of Dl Smith Re Resources Available for Transport & Treatment of Contaminated Injured Persons.Resume Encl 1999-03-02
[Table view] Category:DEPOSITIONS
MONTHYEARML20207E0051999-03-0202 March 1999 Transcript of 990302 Public Meeting with Commonwealth Edison in Rockville,Md.Pp 1-104.Supporting Documentation Encl ML20236H9381998-06-30030 June 1998 Transcript of 980630 Meeting W/Commonwealth Edison in Rockville,Md.Pp 1-123.Supporting Documentation Encl ML20198P3001997-11-0404 November 1997 Transcript of 971104 Public Meeting W/Ceco in Rockville,Md Re Measures Established by Ceco to Track Plant Performance & to Gain Understanding of CAs Put Into Place to Improve Safety.Pp 1-105.W/Certificate & Viewgraphs ML20209J3251987-01-30030 January 1987 Transcript of 870130 Commission Discussion/Possible Vote on Full Power OL for Facility.Pp 1-72.Supporting Viewgraphs Encl ML20211B0841986-08-0505 August 1986 Transcript of 860805 Meeting Between Region Iii,Computer Interference Elimination & Util in Redmond,Wa Re Plant as-built Drawing Review.Pp 1-200 ML20096A6261984-08-30030 August 1984 Summary of Rebuttal Testimony & Testimony of ML Somsag, Eb Branch,D Demoss,Mr Frankel,Bf Maurer & Jk Buchanan Re Plant QC Inspector Reinsp Program & C Stokes Allegations Re Welds.Related Correspondence ML20096A6191984-08-30030 August 1984 Rebuttal Testimony of B Erler Re Stokes Allegations Concerning Evaluations of Discrepancies in Calculated Actual Stress Performed by Sargent & Lundy.Related Correspondence ML20096A6391984-08-30030 August 1984 Rebuttal Testimony of RW Hooks Re Validity of Info in Attachment 7 to Stokes Testimony Concerning Design Assumption for Plant.Stokes Info Inapplicable to Plant. Related Correspondence ML20094P7721984-08-17017 August 1984 Summary of Testimony & Direct Testimony of CC Stokes on Reinsp Program.Related Correspondence ML20094R1021984-08-17017 August 1984 Transcript of CC Stokes 840817 Deposition in Chicago,Il. Pp 1-173.Vol Ii.Related Correspondence ML20094P5991984-08-16016 August 1984 Direct Testimony of CC Stokes Re Engineering Evaluations Performed & Use of Engineering Judgement by Sargent & Lundy. Suggests Need for Independent Engineering Analysis of Safety Significance of Reinsp Program.Related Correspondence ML20094P6311984-08-14014 August 1984 Summary of Testimony & Testimony of Ds Kochhar on Contention 1 Re Reinsp Program.Certificate of Svc Encl.Related Correspondence ML20094P6831984-08-13013 August 1984 Summary of Testimony & Testimony of Wh Bleuel on Contention 1 Re Reinsp Program.Resume Encl.Related Correspondence ML20094P6951984-08-13013 August 1984 Summary of Testimony & Testimony of EP Erickson on Contention 1 Re Reinsp program-inspector Qualification & Work Quality.Resume & Certificate of Svc Encl.Related Correspondence ML20093L4881984-07-30030 July 1984 Summary of Testimony & Testimony of Eb Branch Re Contention 1 (Reinsp Program,Work Quality).Related Correspondence ML20093L1811984-07-30030 July 1984 Summary of Testimony & Testimony of KT Kostal on Contention 1 Re Capacity of Sys Control Corp Supplied Components to Carry Design Loads.Related Correspondence ML20093L2721984-07-30030 July 1984 Summary of Testimony & Testimony of Ak Singh on Contention 1 Re Evaluations of Discrepancies in Cable Tray Hanger Connections,Solid Bottom Tray Welds & Ladder Tray Weld Connections.Related Correspondence ML20093L2051984-07-30030 July 1984 Summary of Testimony & Testimony of Ld Johnson on Contention 1 Re Adequacy of Sys Control Corp Supplied Main Control Boards.Related Correspondence ML20090E5521984-07-17017 July 1984 Testimony of Eb Branch Re Job Responsibilities,Educ Background & Work Experience.Related Correspondence ML20090A7981984-07-0909 July 1984 Testimony of Gf Marcus Re Pittsburgh Testing Lab Source Insp of Equipment & Components Supplied by Sys Control Corp ML20090A8121984-07-0909 July 1984 Testimony of Bf Maurer Re Analysis of Structural Adequacy of Main Control Panels Designed & Fabricated by Sys Control Corp ML20092P7921984-07-0202 July 1984 Summary of Testimony & Testimony of ML Somsag Re QA Inspector Reinsp Program for Hunter Corp.Related Correspondence ML20092P7891984-07-0202 July 1984 Summary of Testimony & Testimony of Rv Laney on Contention 1 Re Work Quality.Related Correspondence ML20092P7951984-07-0202 July 1984 Summary of Testimony & Testimony of Ak Singh on Contention 1 Re Reinsp Program,Work Quality.Related Correspondence ML20092P7941984-07-0202 July 1984 Summary of Testimony & Testimony of LO Delgeorge on Contention 1 Re Reinsp Program,Inspector Qualification & Work Quality.Related Correspondence ML20092P5541984-07-0202 July 1984 Summary of Testimony & Testimony of Dl Leone on Contention 1 Re Reinsp Program for Work Quality ML20092P5551984-07-0202 July 1984 Summary of Testimony & Testimony of R French on Contention 1 Re Reinsp Program ML20092P7781984-07-0202 July 1984 Summary of Testimony & Testimony of Wj Shewski on Contention 1 Re Reinsp Program,Inspector Qualification.Related Correspondence ML20092P7811984-07-0202 July 1984 Summary of Testimony & Testimony of Jm Mclaughlin on Contention 1 Re Reinsp Program,Work Quality.Related Correspondence ML20092P7871984-07-0202 July 1984 Summary of Direct Testimony & Testimony of RP Tuetken Re Reinsp Program.Related Correspondence ML20092P7851984-07-0202 July 1984 Summary of Testimony & Testimony of Wb Behnke on Contention 1 Re Overview of Quality Program,Work Quality. Related Correspondence ML20092N4971984-06-29029 June 1984 Testimony of Bg Treece on Issues 5 & 6 Re Cable Overtensioning,As Limited by ASLB 840608 Order.Related Correspondence ML20092N4911984-06-29029 June 1984 Summary of Direct Testimony of Jo Binder on Issues 5 & 6 Re Cable Overtensioning,As Limited by ASLB 840608 Order.Related Correspondence ML20092K7691984-06-26026 June 1984 Summary of Testimony of J Hansel on Contention 1 Re Reinsp Program.Prof Qualifications Encl.Related Correspondence ML20205H8901983-08-10010 August 1983 Public Version of Transcript of 830810 in Camera,Ex Parte Hearing in Rockford,Il.Pp 7,585-7,610 ML20205H8941983-08-10010 August 1983 Public Version of Transcript of 830810 in Camera,Ex Parte Hearing W/Ofc of Investigations in Rockford,Il.Pp 7,611.1- 7,611.71 ML20205H8841983-08-0909 August 1983 Public Version of Transcript of 830809 in Camera,Ex Parte Hearing in Rockford,Il.Pp 7,304-7,405 ML20080B3051983-08-0303 August 1983 Testimony of RP Tuetken Re Util Reinsp Program of Work Performed by Contractor Insp Personnel Prior to NRC Region III Mar,Apr & May 1982 Insps.Appropriate Steps Taken to Remedy Problems ML20080B3091983-08-0303 August 1983 Testimony of Aw Koca Re General Nature of Hatfield Inspector Training & Certification Program.Certification of J Hughes Described ML20080B2951983-08-0303 August 1983 Testimony of Ma Stanish Re Recertification of Qa/Qc Inspectors Subsequent to NRC Region III Mar,Apr & May 1982 Special Team Insps.Reinsp Program Implemented to Review Work Performed by Inspectors Before NRC 1982 Insp ML20023C7151983-05-12012 May 1983 Testimony of P Holmbeck Re Investigation Into Adequacy of Emergency Plans Re Emergency Planning Contentions.Util Made No Attempt to Study Protective Value of Sheltering Populations Around Plant ML20204F5721983-04-26026 April 1983 Transcript of 830426 Hearing in Rockford,Il.Pp 5,964-6,156 ML20069M4791983-04-25025 April 1983 Handwritten Testimony of J Hughes Re Qa/Qc at Facility ML20069K5691983-04-21021 April 1983 Testimony of Ld Butterfield Re Steam Generator Tube Integrity.Proposed Steam Generator Mods Would Minimize Tube Wear Due to Flow Induced Vibration.Related Correspondence ML20069K5631983-04-21021 April 1983 Revised Testimony of Tf Timmons Re Steam Generator Tube Integrity (Flow Induced Vibration Phenomenon).No Significant Tube Wear Will Be Experienced in Steam Generators Due to Flow Induced Vibration.Related Correspondence ML20073J6691983-04-18018 April 1983 Testimony of Jl Murphy on Rockford League of Women Voters & Dekalb Area Alliance for Responsible Energy/Sinnissippi Alliance for Environ Consolidated Emergency Planning Contentions 3 & 13.Related Correspondence ML20073K4461983-04-18018 April 1983 Rebuttal Testimony of Levine Re Rockford League of Women Voters Contentions 8 & 62 & Dekalb Area Alliance for Responsible Energy/Sinnissippi Alliance for Environ Contention 2a on Public Risk.Related Correspondence ML20073G4241983-04-11011 April 1983 Testimony of Ee Jones Re State of Il Emergency Svc & Disaster Agency Responsibilities Concerning Emergency Planning for Nuclear Facilities & Intervenor Amended Emergency Planning Contention ML20073G4051983-04-11011 April 1983 Testimony of Jc Golden Re Amended Emergency Planning Contention ML20073G4121983-04-11011 April 1983 Testimony of Dl Smith Re Resources Available for Transport & Treatment of Contaminated Injured Persons.Resume Encl 1999-03-02
[Table view] Category:NARRATIVE TESTIMONY
MONTHYEARML20207E0051999-03-0202 March 1999 Transcript of 990302 Public Meeting with Commonwealth Edison in Rockville,Md.Pp 1-104.Supporting Documentation Encl ML20236H9381998-06-30030 June 1998 Transcript of 980630 Meeting W/Commonwealth Edison in Rockville,Md.Pp 1-123.Supporting Documentation Encl ML20198P3001997-11-0404 November 1997 Transcript of 971104 Public Meeting W/Ceco in Rockville,Md Re Measures Established by Ceco to Track Plant Performance & to Gain Understanding of CAs Put Into Place to Improve Safety.Pp 1-105.W/Certificate & Viewgraphs ML20209J3251987-01-30030 January 1987 Transcript of 870130 Commission Discussion/Possible Vote on Full Power OL for Facility.Pp 1-72.Supporting Viewgraphs Encl ML20211B0841986-08-0505 August 1986 Transcript of 860805 Meeting Between Region Iii,Computer Interference Elimination & Util in Redmond,Wa Re Plant as-built Drawing Review.Pp 1-200 ML20096A6261984-08-30030 August 1984 Summary of Rebuttal Testimony & Testimony of ML Somsag, Eb Branch,D Demoss,Mr Frankel,Bf Maurer & Jk Buchanan Re Plant QC Inspector Reinsp Program & C Stokes Allegations Re Welds.Related Correspondence ML20096A6191984-08-30030 August 1984 Rebuttal Testimony of B Erler Re Stokes Allegations Concerning Evaluations of Discrepancies in Calculated Actual Stress Performed by Sargent & Lundy.Related Correspondence ML20096A6391984-08-30030 August 1984 Rebuttal Testimony of RW Hooks Re Validity of Info in Attachment 7 to Stokes Testimony Concerning Design Assumption for Plant.Stokes Info Inapplicable to Plant. Related Correspondence ML20094P7721984-08-17017 August 1984 Summary of Testimony & Direct Testimony of CC Stokes on Reinsp Program.Related Correspondence ML20094R1021984-08-17017 August 1984 Transcript of CC Stokes 840817 Deposition in Chicago,Il. Pp 1-173.Vol Ii.Related Correspondence ML20094P5991984-08-16016 August 1984 Direct Testimony of CC Stokes Re Engineering Evaluations Performed & Use of Engineering Judgement by Sargent & Lundy. Suggests Need for Independent Engineering Analysis of Safety Significance of Reinsp Program.Related Correspondence ML20094P6311984-08-14014 August 1984 Summary of Testimony & Testimony of Ds Kochhar on Contention 1 Re Reinsp Program.Certificate of Svc Encl.Related Correspondence ML20094P6831984-08-13013 August 1984 Summary of Testimony & Testimony of Wh Bleuel on Contention 1 Re Reinsp Program.Resume Encl.Related Correspondence ML20094P6951984-08-13013 August 1984 Summary of Testimony & Testimony of EP Erickson on Contention 1 Re Reinsp program-inspector Qualification & Work Quality.Resume & Certificate of Svc Encl.Related Correspondence ML20093L4881984-07-30030 July 1984 Summary of Testimony & Testimony of Eb Branch Re Contention 1 (Reinsp Program,Work Quality).Related Correspondence ML20093L1811984-07-30030 July 1984 Summary of Testimony & Testimony of KT Kostal on Contention 1 Re Capacity of Sys Control Corp Supplied Components to Carry Design Loads.Related Correspondence ML20093L2721984-07-30030 July 1984 Summary of Testimony & Testimony of Ak Singh on Contention 1 Re Evaluations of Discrepancies in Cable Tray Hanger Connections,Solid Bottom Tray Welds & Ladder Tray Weld Connections.Related Correspondence ML20093L2051984-07-30030 July 1984 Summary of Testimony & Testimony of Ld Johnson on Contention 1 Re Adequacy of Sys Control Corp Supplied Main Control Boards.Related Correspondence ML20090E5521984-07-17017 July 1984 Testimony of Eb Branch Re Job Responsibilities,Educ Background & Work Experience.Related Correspondence ML20090A7981984-07-0909 July 1984 Testimony of Gf Marcus Re Pittsburgh Testing Lab Source Insp of Equipment & Components Supplied by Sys Control Corp ML20090A8121984-07-0909 July 1984 Testimony of Bf Maurer Re Analysis of Structural Adequacy of Main Control Panels Designed & Fabricated by Sys Control Corp ML20092P7921984-07-0202 July 1984 Summary of Testimony & Testimony of ML Somsag Re QA Inspector Reinsp Program for Hunter Corp.Related Correspondence ML20092P7891984-07-0202 July 1984 Summary of Testimony & Testimony of Rv Laney on Contention 1 Re Work Quality.Related Correspondence ML20092P7951984-07-0202 July 1984 Summary of Testimony & Testimony of Ak Singh on Contention 1 Re Reinsp Program,Work Quality.Related Correspondence ML20092P7941984-07-0202 July 1984 Summary of Testimony & Testimony of LO Delgeorge on Contention 1 Re Reinsp Program,Inspector Qualification & Work Quality.Related Correspondence ML20092P5541984-07-0202 July 1984 Summary of Testimony & Testimony of Dl Leone on Contention 1 Re Reinsp Program for Work Quality ML20092P5551984-07-0202 July 1984 Summary of Testimony & Testimony of R French on Contention 1 Re Reinsp Program ML20092P7781984-07-0202 July 1984 Summary of Testimony & Testimony of Wj Shewski on Contention 1 Re Reinsp Program,Inspector Qualification.Related Correspondence ML20092P7811984-07-0202 July 1984 Summary of Testimony & Testimony of Jm Mclaughlin on Contention 1 Re Reinsp Program,Work Quality.Related Correspondence ML20092P7871984-07-0202 July 1984 Summary of Direct Testimony & Testimony of RP Tuetken Re Reinsp Program.Related Correspondence ML20092P7851984-07-0202 July 1984 Summary of Testimony & Testimony of Wb Behnke on Contention 1 Re Overview of Quality Program,Work Quality. Related Correspondence ML20092N4971984-06-29029 June 1984 Testimony of Bg Treece on Issues 5 & 6 Re Cable Overtensioning,As Limited by ASLB 840608 Order.Related Correspondence ML20092N4911984-06-29029 June 1984 Summary of Direct Testimony of Jo Binder on Issues 5 & 6 Re Cable Overtensioning,As Limited by ASLB 840608 Order.Related Correspondence ML20092K7691984-06-26026 June 1984 Summary of Testimony of J Hansel on Contention 1 Re Reinsp Program.Prof Qualifications Encl.Related Correspondence ML20205H8901983-08-10010 August 1983 Public Version of Transcript of 830810 in Camera,Ex Parte Hearing in Rockford,Il.Pp 7,585-7,610 ML20205H8941983-08-10010 August 1983 Public Version of Transcript of 830810 in Camera,Ex Parte Hearing W/Ofc of Investigations in Rockford,Il.Pp 7,611.1- 7,611.71 ML20205H8841983-08-0909 August 1983 Public Version of Transcript of 830809 in Camera,Ex Parte Hearing in Rockford,Il.Pp 7,304-7,405 ML20080B3051983-08-0303 August 1983 Testimony of RP Tuetken Re Util Reinsp Program of Work Performed by Contractor Insp Personnel Prior to NRC Region III Mar,Apr & May 1982 Insps.Appropriate Steps Taken to Remedy Problems ML20080B3091983-08-0303 August 1983 Testimony of Aw Koca Re General Nature of Hatfield Inspector Training & Certification Program.Certification of J Hughes Described ML20080B2951983-08-0303 August 1983 Testimony of Ma Stanish Re Recertification of Qa/Qc Inspectors Subsequent to NRC Region III Mar,Apr & May 1982 Special Team Insps.Reinsp Program Implemented to Review Work Performed by Inspectors Before NRC 1982 Insp ML20023C7151983-05-12012 May 1983 Testimony of P Holmbeck Re Investigation Into Adequacy of Emergency Plans Re Emergency Planning Contentions.Util Made No Attempt to Study Protective Value of Sheltering Populations Around Plant ML20204F5721983-04-26026 April 1983 Transcript of 830426 Hearing in Rockford,Il.Pp 5,964-6,156 ML20069M4791983-04-25025 April 1983 Handwritten Testimony of J Hughes Re Qa/Qc at Facility ML20069K5691983-04-21021 April 1983 Testimony of Ld Butterfield Re Steam Generator Tube Integrity.Proposed Steam Generator Mods Would Minimize Tube Wear Due to Flow Induced Vibration.Related Correspondence ML20069K5631983-04-21021 April 1983 Revised Testimony of Tf Timmons Re Steam Generator Tube Integrity (Flow Induced Vibration Phenomenon).No Significant Tube Wear Will Be Experienced in Steam Generators Due to Flow Induced Vibration.Related Correspondence ML20073J6691983-04-18018 April 1983 Testimony of Jl Murphy on Rockford League of Women Voters & Dekalb Area Alliance for Responsible Energy/Sinnissippi Alliance for Environ Consolidated Emergency Planning Contentions 3 & 13.Related Correspondence ML20073K4461983-04-18018 April 1983 Rebuttal Testimony of Levine Re Rockford League of Women Voters Contentions 8 & 62 & Dekalb Area Alliance for Responsible Energy/Sinnissippi Alliance for Environ Contention 2a on Public Risk.Related Correspondence ML20073G4241983-04-11011 April 1983 Testimony of Ee Jones Re State of Il Emergency Svc & Disaster Agency Responsibilities Concerning Emergency Planning for Nuclear Facilities & Intervenor Amended Emergency Planning Contention ML20073G4051983-04-11011 April 1983 Testimony of Jc Golden Re Amended Emergency Planning Contention ML20073G4121983-04-11011 April 1983 Testimony of Dl Smith Re Resources Available for Transport & Treatment of Contaminated Injured Persons.Resume Encl 1999-03-02
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Revised Testimony i i
y-
- i" f UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD a
i
+ '
In the Matter of )
)
COMMONUEALTH EDISON COMPANY ) Docket Mos. 50-545 OL i ) 50-455 OL (Byron Nuclear Power Station, )
Units 1 & 2) )
SUMMARY
OF TESTIMONY OF GEORGE C. KLOPP CONCERNING i CONSOLIDATED CONTENTIONS 39 AND 109 Mr Klopp is a General Design Engineer employed by i
j Commonwealth Edison Company. Mr. Klopp has considerable expertise in the field of probabilistic risk assessment of nuclear power plant accidents. His testimony addresses the likelihood of a core melt accident which would lead to l significant releases of radioactive contaminants to the i groundwater.
Mr. Klopp first discusses the reasons why, in his opinion, a core melt event with total penetration of the containment basemat is extremely improbable. He then sets forth the basis for his coinion why the NRC Staff conclusion that the risk of releases to the groundwater associated with core melt events are "small" is very conservative. Mr. Klopp finally explains that because of the extreme improbability of the core melt /basemat penetration event, the overall conclusion regarding the liquid pathway risk-is not very 8304060331 830404 PDR ADOCK 05000454 T PDR 4
sensitive to uncertainties regarding the transit time of conteninants through the groundwater.
~
UN1TED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of )
)
COMMONWEALTH EDISON COMPANY ) Docket No. 50-454 OL
) 50-455 OL (Byron Nuclear Power Station, )
Units 1 & 2) )
TESTIMONY OF GEORGE KLOPP CONCERNING CONSOLIDATED CONTENTIONS 39 AND 109 0.1. Please state your name, present occupation and present position.
A.l. My name is George Klopp. I'm a General Design Engineer in Commonwealth Edison's Station Nuclear Engineering Department.
Q.2. Briefly state you educational and professional qualifications.
A.2. In 1964, I received a B.S.M.E. and in 1965 I received an M.S.M.E. (nuclear option) from the University of Kentucky. I have been with Common-wealth Edison since 1965, except for a two year military leave of absence, and I have been involved in engineering, operation, engineering management, and safety analysis relating to nuclear plants for my entire career.
1 0.3. Describe your current duties and responsibilities with Commonwealth Edison.
A.3. At this time, I have a number of responsibilities.
They include: (1) Technical Director of Edison's Zion Probabilistic Safety Study (PSS) since 1979.
My responsibilities in this capacity include participating in the development of new techniques employed to model containment effects, performing certain calculations, coordinating the work of various consultants assisting the company in this study, participating in the review of the study and i
controlling the schedule and budget for the project.
i Since the PSS has been submitted to the NRC, my ongoing responsibilities have included licensing activities, training Edison personnel with respect i
to the study, and evaluations of the need for power l
plant design modifications and changes to operating procedures related to the Zion PSS. (2) Lead engineer for Edison's technical participation in the Industry Degraded Core Program (IDCOR). (3) Techni-cal director for the Byron Risk Study. My responsi-bilities included establishing scope and metinslology of the study, reviewing study calculations, performing verification calculations, participating in report writing and conducting a review of the report with senior engineers at Westinghouse L __ _ _ _ __ _. . -- . _ _ --- - - - - - -
Electric Co. (4) Acted as Edison's representative to the technical writing group of the industry /NRC Probabilistic Risk Assessment Procedures Guide Program. (5) Acted as technical adviser on the Clinch River Breeder reactor plant probabilistic risk assessment program. (6) Acted as Edison's representative to the Department of Energy Working Group on Probabilistic Risk Assessment. (7) Acting as pressurized water reactor technical adviser to 1
Edison's Generating Stations Emergency Plan program.
(8) Acting as a technical adviser to other groups or departments within Edison on matters related to-nuclear safety, risk assessment and degraded core phenomenology. (9) In October, 1982, I also become responsible for licensing, pre-operational test review and NSSS management for Byron and Braidwood reporting directly to the Director of Engineering for those plants.
Q.4. What other assignments have you held at Commonwealth Edison Company?
A.4. My earlier assignments with the Company included:
(1) Acting as lead Nuclear Engineer, in Edison's Engineering Department, for the Zion Station project during design, construction and initial start-up.
(2) Acting as the Project Engineer for the first two
_ - _ - _ _ _ . _ - - . - - _ _ - . - - - - - - - - . . ----- - - - - - - - - ~
4-years of the Byron Braidwood Project Development.
(3) Serving as an Operating Engineer in the radio-active waste disposal area at the Dresden Station. *
(4) Serving as a Project Engineer for the Station Nuclear Engineering Departments Reliability and Design Engineering Group.
Q.5. Have you written any articles in professional engineering journals?
A.5. Yes. I have written an article entitled " Highlights of the Zion Probabilistic Safety Study" which appeared in the January 1982 edition of " Power Engineering." This article traced the basic principles employed in the Zion Study, enumerated new techniques used and presented the study findings.
Q.6. What is the scope of your testimony?
A.6. My testimony addresses certain of the issues raised l
by Consolidated Contentions 39 and 109. Those Contentions, together with explanatory material supplied by the intervenors during discovery, assert that the consequences of radionuclide release to the underlying aquifer cannot be predicted with confi-dence and, accordingly, that required findings under the Atomic Energy Act and NEPA cannot be made. My 9 w--r= 6gWgerf w g-q--n$P=-i**g--- va- eus->q y r9$ +y --
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testimony analyzes such a radionuclide release
- following a large-scale accident (containment i basemat penetration) in the context of the likeli-hood of such an event occurring. I discuss whether the safety regulations of the NRC require such an
! analysis and whether the subject is treated appropriately in the Byron FES.
Q.7. Please describe the basis for the professional engineering opinion which appear subsequently in
, your testimony.
l A.7. The opinions expressed in this testimony are based l
on my study of WASH-1400, my work on the Zion PSS and the IDCOR program and my work on and results of the Byron Risk Study.
Q.8. Is penetration of the containment basemat and subsequent release of radioactive material in the underlying ground water analyzed in the Byron FSAR.
A.8. No.
Q.9. Why was such an analysis not made in the Byron FSAR?
A.9. Such an analysis presupposes that a full core melt and subsequent p,enetration of the reactor vessel by molten core material has occurred. The FSAR does not analyze events involving full core melts.
l t
Q.10. Why is this the case?
A.10. The FSAR accident analyses are performed in i
accordance with all the requirements imposed by NRC l
regulations, regulatory guides and standard review
, plans. As such, they evaluate a wide spectrum of j accidents ranging from those involving routine operating transients to those involving design basis accidents such as a large loss-of-coolant accident.
The FSAR does not analyze accidents beyond the l- design basis such as full core melts because these events are deemed to be sufficiently improbable and because regulatory requirements for such analyses in the FSAR do not exist. It has been an NRC policy recently reiterated by the Commissioners that such events need not be considered in the context of individual safety proceedings.
4 Q.11. What protections are provided in the design of the Byron Station to minimize the likelihood of a core melt event and to prevent ground water contamination 1
following a core melt accident?
A.ll. Groundwater contamination as a consequence of a core melt accident can occur only as a result of penetration of the underlying concrete and steel basemat by molten core debris. This penetration would occur as a result of continued ablation of the
I '
basemat by high temperature core debris. The probability of this penetration is very small due primarily to design features which reduce the probability of a core melt occurring in the first place to a very small value. These features include
- the ECCS, the instrumentation and protection logic systems, the basic structure of the primary auxiliary systems themselves and the redundancy of I
critical support systems. Secondly, the design of
! the Byron containment systems is such that even should a core melt occur, basemat penetration will occur only in the severest of accidents. This
! further reduces the probability of such an event.
In the event of a core melt which proceeds to vessel failure, this failure is predicted to occur at the instrumentation penetrations in the vessel lower head. Upon failure the core debris will be dispersed over the floor of the reactor cavity area of containment and, in most cases, over the upper basemat area. The reactor cavity at Byron is the low point of the containment. Because of this design feature, water which collects on the basemat from the operation of containment sprays and primary system leakage spills readily into the reactor cavity. This cavity water will quench the core
! debris to a temperature below that required for concrete ablation preventing basemat penetration.
The continued presence of water resulting from spray 9 or fan cooler operation prevents reheating of the core debris, i
In cases where no cavity water is present (i.e.,
failure of containment sprays and fan coolers),
concrete ablation occurs at a relatively slow rate i
such that time is available to procure an alternate source of water or restore existing systems.
Q.12. How has the risk of groundwater contamination I
! following coremelt accidents been characterized in the Byron FES?
A.12. The risk of groundwater contamination following a postulated core melt accident is one of several impacts from severe accidents which are analyzed in i
Chapter 5 of the FES. The NRC's overall conclusion regarding all such severe accidents is that their
" impact's could be severe but the likelihood of their i
occurrence is judged to be small". These conclu-J t sions regarding overall accident risk including risk of groundwater contamination following a postulated core melt accident are further refined by the NRC in its Table 6.1 Benefit-Cost Summary in which human
I health effects due to accident risk are character-ined as having a "small" impact. The word "small" is defined as " impacts which in the reviewer's
- judgment are of such minor nature . . . that they do not warrant detailed investigations or considera-tions of mitigating actions "
The Byron FES has treated releases of radioactivity i
to groundwater and has shown the doses to be a very 1
small fraction of those that can arise from f
l atmosphere pathways. In this study, which used NUREG-0440, " Liquid Pathway Generic Study", as a guide, a number of conservative assumptions were used to estimate the timing and magnitude of ground water contamination. In the Byron FES calculation
! of ground water contamination, it was assumed that i
i upon basemat failure, water from the containment would be available to transport radionuclides quickly to ground water sources. More recent analysis has shown that for the cases in which l
basemat failure is predicted at Byron no containment water will be present. This has the effect of decreasing both the timing and magnitude of radionuclide releases.
4 1 .
. i 1
0.13. Do you have a professional opinion as to the
- validity and accuracy of the FES characterization of the risk to the population arising from an accident resulting in containment basemat penetration?
A.13. Yes. The Byron FES characterization of liyuid pathways risk is in my judgment very significantly 1
1 conservative. Some of the major areas of conserva-tism are: (1) The Byron FES assumes that each and 1
every postulated core melt event results in contain-ment basemat failure with subsequent groundwater release. In my judgment, the vast majority of postulated core melt events would not result 1
in containment basemat failure. (2) The source term
- employed in the Byron FES is based on the assumption that two mechanisms exist for transporting radio-active material to the groundwater. The dominant f mechanism involves the release of what is called sump water which would be highly contaminated by core debris material. This source term contribution is 100 to 1,000 times greater than the second i
mechanism which involves leaching of radioactive material from the debris once the core debris is in contact with groundwater. At Byron the sump water l source term can be eliminated since basemat i
l penetration will not occur coincident with the i
presence of significant sump water. Therefore, the 4
4
FES source term is a factor of 100 to 1,000 too
, high.
l, S
Q.14. What is the basis for your opinion regarding the
, conservatism of the FES calculation of the risk from
- groundwater contamination following containment
- basemat penetration.
A.14. The basis for my judgment rests on detailed calcula-tional work done for the Zion Probabilistic Safety Study, the Indian Point Probabilistic Safety Study, the Byron risk study and ongoing programs under the auspices of the IDCOR program. These efforts have been cross-calibrated in detail with the results of wide variety of experimental programs both here and i
abroad. The basic conclusion from this work which results in the judgments I have just rendered is l that molten core debris will be coolable even outside the reactor vessel provided that an adequate supply of water is available to quench the debris and that heat removal mechanisms such as containment '
sprays or containment fan coolers are operational.
Clearly then to have basemat penetration, one must '
postulate that the water needed to cool the debris is absent. With that water being absent, no sump water source term can exist. Even if the quench water is absent and basemat concrete attack is l
evaluated, the period of time available before basemat penetration is complete ranges from eight hours to days. This time period would allow margin for recovery actions that would involve adding water to the debris and restoring the operation of heat removal systems.
Q.15. Do you agree with the FES conclusion that the risk from severe accidents at Byron is small and that the contribution to that small residual risk from liquid pathways is very small?
A.15. Yes, I do. The work that we have done and which I have cited in response to a previous question, indicates that the FES in general presents a very conservative representation of the risk from Byron and for the reasons noted in response to the previous question, I clearly agree that liquid pathways represent an insignificant fraction of that small residual risk.
Q.16. How important, then, is the potential sensitivity of groundwater risk to uncertainties in the groundwater transit time?
A.16. Clearly it is not important. The probability of basemat penetration is very low and the source term available is far lower than has been previously
estimated. The Byron FES results show that liquid pathways risk is not significant. It may be argued that the transit time used in the FES are too long or too short or too uncertain but such effects are insignificant given the fact that the FES source terms was a factor of 100 to 1,000 more severe than is appropriate for Byron.