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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20217H6231999-10-18018 October 1999 Discusses Completion of Licensing Action for GL 98-01 & Suppl 1, Yr 2000 Readiness of Computer Sys at Npps, to All Holders of Operating Licenses for NPPs ML20217J4331999-10-15015 October 1999 Forwards Insp Rept 50-461/99-19 on 990913-17.One Violation Re Individual Failure to Follow Radiation Protection Procedures When Accessing High Radiation Area Noted & Being Treated as Noncited Violation U-603280, Forwards Rev 27 to Clinton Power Station Physical Security Plan,Iaw 10CFR50.54(p).Encl Withheld from Public Disclosure, Per 10CFR50.54(p)1999-10-12012 October 1999 Forwards Rev 27 to Clinton Power Station Physical Security Plan,Iaw 10CFR50.54(p).Encl Withheld from Public Disclosure, Per 10CFR50.54(p) ML20217C0871999-10-11011 October 1999 Forwards Proprietary Attachment Inadvertently Omitted from Encl 2 to Submitting Responses to NRC RAI Re License Transfer Application for Plant.Proprietary Encl Withheld U-603276, Forwards Rev 8 to CPS USAR, Which Includes Changes from 970701 Through 990630 & Available Changes Approved After 990630 That Reduce Overall Burden of Submittal Changes for Forthcoming Reporting period.10CFR50.59 Rept Included1999-10-0808 October 1999 Forwards Rev 8 to CPS USAR, Which Includes Changes from 970701 Through 990630 & Available Changes Approved After 990630 That Reduce Overall Burden of Submittal Changes for Forthcoming Reporting period.10CFR50.59 Rept Included U-603279, Forwards non-proprietary & Proprietary Responses to NRC RAI Re License Transfer Application for Plant.Attached Responses Also Respond to Comments of Environ Law & Policy Center Dtd 990920.Proprietary Encl Withheld1999-10-0707 October 1999 Forwards non-proprietary & Proprietary Responses to NRC RAI Re License Transfer Application for Plant.Attached Responses Also Respond to Comments of Environ Law & Policy Center Dtd 990920.Proprietary Encl Withheld U-603275, Provides Updated Illinois Power Rept on Status of Decommissioning Funding for Clinton Power Station1999-10-0707 October 1999 Provides Updated Illinois Power Rept on Status of Decommissioning Funding for Clinton Power Station ML20217A9881999-10-0101 October 1999 Advises of NRC Plans for Future Insp Activities at Facility for Licensee to Have Opportunity to Prepare for Insps & to Provide NRC with Feedback on Any Planned Insps Which May Conflict with Plant Activities ML20217A7361999-10-0101 October 1999 Forwards Insp Repts 50-461/99-14 & 50-461/98-12 on 990729-0908.Two Violations Identified,One Re Failure to Place Control Switch in Proper Position to Identify Piece of out-of-svc Equipment & Being Treated as NCVs ML20217J1251999-09-30030 September 1999 Refers to Investigation 3-1997-040 Conducted from 971028- 980921 & Forwards Nov.Investigations Determined That During Jan 1997,supervisor Qv Dept Discriminated Against Qv Inspector in Retaliation for Inspector Contacts with NRC ML20217J1421999-09-30030 September 1999 Refers to Investigation 3-97-040 Conducted from 971028- 980921 & Forwards Nov.Investigation Concluded That Recipient Engaged in Deliberate Misconduct in That Recipient Discriminated Againt Qv Inspector for Having Contacted NRC ML20212G6751999-09-22022 September 1999 Forwards Comment Submitted to NRC by Environ Law & Policy Ctr Re Proposed License Transfer for Clinton Power Station U-603272, Provides Update to Final Response to GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants. 3-D Monicore & Station Security Sys remediated.Y2K Readiness Disclosure for Cps,Encl1999-09-22022 September 1999 Provides Update to Final Response to GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants. 3-D Monicore & Station Security Sys remediated.Y2K Readiness Disclosure for Cps,Encl U-603225, Provides Closure of Util Commitments Re Ci Cv Noted in Previous Ltr to Nrc.Basis for Expecting Valves to Remain in leak-tight Condition Throughout Operating Cycle & Basis That Justifies Not Performing mid-cycle Leak Testing,Encl1999-09-20020 September 1999 Provides Closure of Util Commitments Re Ci Cv Noted in Previous Ltr to Nrc.Basis for Expecting Valves to Remain in leak-tight Condition Throughout Operating Cycle & Basis That Justifies Not Performing mid-cycle Leak Testing,Encl ML20212G6981999-09-20020 September 1999 Requests That NRC Reject Proposed License Transfer for Clinton Power Station & That NRC State That Public Interest in Safe Nuclear Power Industry Will Not Be Subordinated to Interest in Maximizing Profit by Limiting Liability ML20217H3421999-09-17017 September 1999 Forwards Request for Addl Info Re Licensee 990723 Application for License Transfer & Conforming Administrative License Amend.Response Requested within 20 Days of Receipt of Ltr 05000461/LER-1996-010, Forwards LER 96-010-01, Plant Shutdown Due to Unidentified RCS Leakage from Degraded Reactor Recirculation Pump Seal Greater than TS Limit. Revised Rept Includes Cause of Event,Corrective Actions & Discussion of Similar Events1999-09-13013 September 1999 Forwards LER 96-010-01, Plant Shutdown Due to Unidentified RCS Leakage from Degraded Reactor Recirculation Pump Seal Greater than TS Limit. Revised Rept Includes Cause of Event,Corrective Actions & Discussion of Similar Events 05000461/LER-1999-011, Forwards LER 99-011-00 Re Improper Restoration of a APRM Which Caused Monitor to Not Meet Seismic Qualification Requirements.Rept Contains Listed Commitments1999-09-10010 September 1999 Forwards LER 99-011-00 Re Improper Restoration of a APRM Which Caused Monitor to Not Meet Seismic Qualification Requirements.Rept Contains Listed Commitments U-603269, Certifies That DB Livingston,License OP-31136,successfully Completed Facility Licensees Requirements to Be Licensed as Ro,Per 10CFR55 & Has Need for RO License to Perform Assigned Duties.Five Significant Control Manipulations,Listed1999-09-10010 September 1999 Certifies That DB Livingston,License OP-31136,successfully Completed Facility Licensees Requirements to Be Licensed as Ro,Per 10CFR55 & Has Need for RO License to Perform Assigned Duties.Five Significant Control Manipulations,Listed ML20211Q2671999-09-0808 September 1999 Informs That NRC Tentatively re-scheduled Initial Licensing Exams for License Operator License Applicants During Weeks of June 5 & 12,2000.Validation of Exams Will Occur at Station During Weeks of May 15,2000 U-603229, Provides Response to NRC RAI Re GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, Dtd 990528.Rev 0 to Calculation IP-M-0556 & Rev 0 to Calculation IP-M-0570,encl1999-08-25025 August 1999 Provides Response to NRC RAI Re GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, Dtd 990528.Rev 0 to Calculation IP-M-0556 & Rev 0 to Calculation IP-M-0570,encl U-603243, Forwards Response to NRC GL 99-02, Lab Testing of Nuclear-Grade Activated Charcoal. Util Performing Testing of ESF Ventilation Sys Charcoal Samples Using ASTM D3803- 1989 Methodology as Required by TS 5.5.71999-08-23023 August 1999 Forwards Response to NRC GL 99-02, Lab Testing of Nuclear-Grade Activated Charcoal. Util Performing Testing of ESF Ventilation Sys Charcoal Samples Using ASTM D3803- 1989 Methodology as Required by TS 5.5.7 ML20211D2201999-08-23023 August 1999 Confirms 990817 Telcon with J Neuschwanger & D Mcneil Re Arrangements Made for NRC to Inspect Licensed Operator Requalification Program at Plant U-603258, Forwards ISI Summary Rept, IAW ASME Section Xi,Article IWA-6000.Summary Rept Addresses ISI Activities Performed at Plant from 950429-990527,including Extended Sixth Refueling Outage1999-08-23023 August 1999 Forwards ISI Summary Rept, IAW ASME Section Xi,Article IWA-6000.Summary Rept Addresses ISI Activities Performed at Plant from 950429-990527,including Extended Sixth Refueling Outage ML20211B0871999-08-20020 August 1999 Responds to J Hopkins Inquiry Re Application for Order Consenting to License Transfer & Approving Conforming Administrative License Amend Filed by Ilpr & Amergen Energy Co on 990723 U-603259, Provides Notification That Cl Kreidler Has Resigned Position with Util,Effective 990818.License Status Should Be Changed to Expired1999-08-19019 August 1999 Provides Notification That Cl Kreidler Has Resigned Position with Util,Effective 990818.License Status Should Be Changed to Expired ML20211A8931999-08-19019 August 1999 Forwards Insp Rept 50-461/99-13 on 990611-0728.Two Violations Noted & Being Treated as Ncvs.Violation Re Three Examples Where Licensee Procedural Requirements for Minor Maint Work Were Not Followed U-603253, Notifies NRC That Je Smith,License SOP-30819-1,has Resigned from Position with Ilpr Effective 990813.Status of License Should Be Changed to Expired,Effective 9908131999-08-16016 August 1999 Notifies NRC That Je Smith,License SOP-30819-1,has Resigned from Position with Ilpr Effective 990813.Status of License Should Be Changed to Expired,Effective 990813 ML20210U3771999-08-12012 August 1999 Forwards Notice of Consideration of Approval of Transfer of FOL & Issuance of Conforming Amend & Opportunity for Hearing Re Amend Request for Approval of Clinton Power Station License NPF-62 Transfer to Amergen U-603250, Notifies NRC That Ma Freihofer (License SOP-31296-1) Has Resigned from Position with Illinois Power Effective 990729 & License Status Should Be Changed to Expired Effective 9907291999-08-10010 August 1999 Notifies NRC That Ma Freihofer (License SOP-31296-1) Has Resigned from Position with Illinois Power Effective 990729 & License Status Should Be Changed to Expired Effective 990729 U-603249, Notifies NRC That He Bouska (License SOP-3055-1) Has Resigned from Position with Illnois Power Effective 990809. & License Status Should Be Changed to Expired Effective 9908091999-08-10010 August 1999 Notifies NRC That He Bouska (License SOP-3055-1) Has Resigned from Position with Illnois Power Effective 990809. & License Status Should Be Changed to Expired Effective 990809 ML20210N2961999-08-0909 August 1999 Forwards Form of Nuclear Decommissioning Master Trust Agreement,Per CPS Application for License Transfer & Conforming Administrative License Amend U-603248, Requests Unrestricted License for Kc Scott,License SOP-31532.Scott Has Successfully Completed Facility Licensee Requirements to Be Licensed as Operator/Senior Operator Per 10CFR551999-08-0606 August 1999 Requests Unrestricted License for Kc Scott,License SOP-31532.Scott Has Successfully Completed Facility Licensee Requirements to Be Licensed as Operator/Senior Operator Per 10CFR55 U-603236, Forwards Revised Data Point Ref File Sheets for Clinton Power Station Computer Points That Input to ERDS1999-08-0202 August 1999 Forwards Revised Data Point Ref File Sheets for Clinton Power Station Computer Points That Input to ERDS ML20210J0541999-07-30030 July 1999 Forwards Three Original Signature Pages of Gr Rainey for Application for License Transfer & Conforming Administrative License Amend, for NRC Files U-603178, Forwards Four ASME Section XI Relief Requests Re Performance of non-destructive Exams for First 120-month Inservice Insp for CPS1999-07-29029 July 1999 Forwards Four ASME Section XI Relief Requests Re Performance of non-destructive Exams for First 120-month Inservice Insp for CPS U-603237, Informs That Util Will Provide Response to fire-related Questions One & Two of NRC RAI Re CPS Ipeee,By 0001311999-07-28028 July 1999 Informs That Util Will Provide Response to fire-related Questions One & Two of NRC RAI Re CPS Ipeee,By 000131 U-603240, Forwards Clinton Power Station semi-annual Fitness for Duty Rept for Period Ending 990630,IAW 10CFR26.711999-07-27027 July 1999 Forwards Clinton Power Station semi-annual Fitness for Duty Rept for Period Ending 990630,IAW 10CFR26.71 U-603235, Forwards Application for License Transfer & Conforming Administrative License Amend for OL NPF-62.Proprietary & Nonproprietary Asset Purchase Agreement Encl.Proprietary Info Withheld,Per 10CFR2.7901999-07-23023 July 1999 Forwards Application for License Transfer & Conforming Administrative License Amend for OL NPF-62.Proprietary & Nonproprietary Asset Purchase Agreement Encl.Proprietary Info Withheld,Per 10CFR2.790 ML20210A4401999-07-16016 July 1999 Forwards Insp Rept 50-461/99-10 on 990422-0610.Four Violations Being Treated as Noncited Violations ML20209G7671999-07-12012 July 1999 Ack Receipt of Encl FEMA Correspondence ,which Transmitted FEMA Evaluation Rept for 981118 Biennial EP Exercise at Clinton Power Station.No Deficiencies Were Observed ML20209D5691999-07-0707 July 1999 Forwards Insp Rept 50-461/99-12 on 990607-11.No Violations Noted.Insp Consisted of Selective Exam of Procedures & Representative Records,Observations of Work in Progress & Interviews with Personnel U-603231, Forwards Summary of Status of Plan for Excellence (Pee) Initiatives & Clinton Power Station (CPS) 1999 Business Plan.Encl Documents Provide Status & Disposition for Actions Not Completed to Date1999-07-0707 July 1999 Forwards Summary of Status of Plan for Excellence (Pee) Initiatives & Clinton Power Station (CPS) 1999 Business Plan.Encl Documents Provide Status & Disposition for Actions Not Completed to Date U-603214, Forwards Results of Analysis Performed on Recently Completed Vendor Contracts,Per GL 83-28, Required Actions Based on Generic Implications of Salem ATWS Events1999-07-0606 July 1999 Forwards Results of Analysis Performed on Recently Completed Vendor Contracts,Per GL 83-28, Required Actions Based on Generic Implications of Salem ATWS Events ML20196J9651999-07-0202 July 1999 Confirms Discussion Between Members of Staffs to Conduct Meeting on 990714 at Clinton Power Station to Discuss Results of Restart Insp & Licensee Progress in Addressing Remaining Long Term C/A Actions to Sustain Improvements ML20196J7131999-06-30030 June 1999 Informs of Closure of Response to Requests for Addl Info to GL 92-01,Rev 1,Supplement 1, Reactor Vessel Structural Integrity, for Clinton Power Station Unit 1 U-603218, Provides Final Response to GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants. Attachment Provides Y2K Readiness Disclosure for Plant1999-06-28028 June 1999 Provides Final Response to GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants. Attachment Provides Y2K Readiness Disclosure for Plant U-603212, Forwards Response to NRC 990315 Telcon Re Proposed Amend of License NPF-62,implementing Feedwater Leakage Control Sys Mode of RHR Sys1999-06-24024 June 1999 Forwards Response to NRC 990315 Telcon Re Proposed Amend of License NPF-62,implementing Feedwater Leakage Control Sys Mode of RHR Sys U-603227, Provides Updated Rept on Status of Decommissioning Funding for Plant.Updated Rept Provides Min Decommissioning Fund Estimate,Per 10CFR50.75(b) & (C) Utilizing NUREG-1307,Rev 8 Methodology1999-06-24024 June 1999 Provides Updated Rept on Status of Decommissioning Funding for Plant.Updated Rept Provides Min Decommissioning Fund Estimate,Per 10CFR50.75(b) & (C) Utilizing NUREG-1307,Rev 8 Methodology ML20196A3471999-06-16016 June 1999 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Rept 50-461/99-11 Issued on 990430.Corrective Actions Will Be Examined During Future Inspections 1999-09-08
[Table view] Category:INCOMING CORRESPONDENCE
MONTHYEARU-603280, Forwards Rev 27 to Clinton Power Station Physical Security Plan,Iaw 10CFR50.54(p).Encl Withheld from Public Disclosure, Per 10CFR50.54(p)1999-10-12012 October 1999 Forwards Rev 27 to Clinton Power Station Physical Security Plan,Iaw 10CFR50.54(p).Encl Withheld from Public Disclosure, Per 10CFR50.54(p) ML20217C0871999-10-11011 October 1999 Forwards Proprietary Attachment Inadvertently Omitted from Encl 2 to Submitting Responses to NRC RAI Re License Transfer Application for Plant.Proprietary Encl Withheld U-603276, Forwards Rev 8 to CPS USAR, Which Includes Changes from 970701 Through 990630 & Available Changes Approved After 990630 That Reduce Overall Burden of Submittal Changes for Forthcoming Reporting period.10CFR50.59 Rept Included1999-10-0808 October 1999 Forwards Rev 8 to CPS USAR, Which Includes Changes from 970701 Through 990630 & Available Changes Approved After 990630 That Reduce Overall Burden of Submittal Changes for Forthcoming Reporting period.10CFR50.59 Rept Included U-603279, Forwards non-proprietary & Proprietary Responses to NRC RAI Re License Transfer Application for Plant.Attached Responses Also Respond to Comments of Environ Law & Policy Center Dtd 990920.Proprietary Encl Withheld1999-10-0707 October 1999 Forwards non-proprietary & Proprietary Responses to NRC RAI Re License Transfer Application for Plant.Attached Responses Also Respond to Comments of Environ Law & Policy Center Dtd 990920.Proprietary Encl Withheld U-603275, Provides Updated Illinois Power Rept on Status of Decommissioning Funding for Clinton Power Station1999-10-0707 October 1999 Provides Updated Illinois Power Rept on Status of Decommissioning Funding for Clinton Power Station U-603272, Provides Update to Final Response to GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants. 3-D Monicore & Station Security Sys remediated.Y2K Readiness Disclosure for Cps,Encl1999-09-22022 September 1999 Provides Update to Final Response to GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants. 3-D Monicore & Station Security Sys remediated.Y2K Readiness Disclosure for Cps,Encl U-603225, Provides Closure of Util Commitments Re Ci Cv Noted in Previous Ltr to Nrc.Basis for Expecting Valves to Remain in leak-tight Condition Throughout Operating Cycle & Basis That Justifies Not Performing mid-cycle Leak Testing,Encl1999-09-20020 September 1999 Provides Closure of Util Commitments Re Ci Cv Noted in Previous Ltr to Nrc.Basis for Expecting Valves to Remain in leak-tight Condition Throughout Operating Cycle & Basis That Justifies Not Performing mid-cycle Leak Testing,Encl ML20212G6981999-09-20020 September 1999 Requests That NRC Reject Proposed License Transfer for Clinton Power Station & That NRC State That Public Interest in Safe Nuclear Power Industry Will Not Be Subordinated to Interest in Maximizing Profit by Limiting Liability 05000461/LER-1996-010, Forwards LER 96-010-01, Plant Shutdown Due to Unidentified RCS Leakage from Degraded Reactor Recirculation Pump Seal Greater than TS Limit. Revised Rept Includes Cause of Event,Corrective Actions & Discussion of Similar Events1999-09-13013 September 1999 Forwards LER 96-010-01, Plant Shutdown Due to Unidentified RCS Leakage from Degraded Reactor Recirculation Pump Seal Greater than TS Limit. Revised Rept Includes Cause of Event,Corrective Actions & Discussion of Similar Events U-603269, Certifies That DB Livingston,License OP-31136,successfully Completed Facility Licensees Requirements to Be Licensed as Ro,Per 10CFR55 & Has Need for RO License to Perform Assigned Duties.Five Significant Control Manipulations,Listed1999-09-10010 September 1999 Certifies That DB Livingston,License OP-31136,successfully Completed Facility Licensees Requirements to Be Licensed as Ro,Per 10CFR55 & Has Need for RO License to Perform Assigned Duties.Five Significant Control Manipulations,Listed 05000461/LER-1999-011, Forwards LER 99-011-00 Re Improper Restoration of a APRM Which Caused Monitor to Not Meet Seismic Qualification Requirements.Rept Contains Listed Commitments1999-09-10010 September 1999 Forwards LER 99-011-00 Re Improper Restoration of a APRM Which Caused Monitor to Not Meet Seismic Qualification Requirements.Rept Contains Listed Commitments U-603229, Provides Response to NRC RAI Re GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, Dtd 990528.Rev 0 to Calculation IP-M-0556 & Rev 0 to Calculation IP-M-0570,encl1999-08-25025 August 1999 Provides Response to NRC RAI Re GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, Dtd 990528.Rev 0 to Calculation IP-M-0556 & Rev 0 to Calculation IP-M-0570,encl U-603243, Forwards Response to NRC GL 99-02, Lab Testing of Nuclear-Grade Activated Charcoal. Util Performing Testing of ESF Ventilation Sys Charcoal Samples Using ASTM D3803- 1989 Methodology as Required by TS 5.5.71999-08-23023 August 1999 Forwards Response to NRC GL 99-02, Lab Testing of Nuclear-Grade Activated Charcoal. Util Performing Testing of ESF Ventilation Sys Charcoal Samples Using ASTM D3803- 1989 Methodology as Required by TS 5.5.7 U-603258, Forwards ISI Summary Rept, IAW ASME Section Xi,Article IWA-6000.Summary Rept Addresses ISI Activities Performed at Plant from 950429-990527,including Extended Sixth Refueling Outage1999-08-23023 August 1999 Forwards ISI Summary Rept, IAW ASME Section Xi,Article IWA-6000.Summary Rept Addresses ISI Activities Performed at Plant from 950429-990527,including Extended Sixth Refueling Outage ML20211B0871999-08-20020 August 1999 Responds to J Hopkins Inquiry Re Application for Order Consenting to License Transfer & Approving Conforming Administrative License Amend Filed by Ilpr & Amergen Energy Co on 990723 U-603259, Provides Notification That Cl Kreidler Has Resigned Position with Util,Effective 990818.License Status Should Be Changed to Expired1999-08-19019 August 1999 Provides Notification That Cl Kreidler Has Resigned Position with Util,Effective 990818.License Status Should Be Changed to Expired U-603253, Notifies NRC That Je Smith,License SOP-30819-1,has Resigned from Position with Ilpr Effective 990813.Status of License Should Be Changed to Expired,Effective 9908131999-08-16016 August 1999 Notifies NRC That Je Smith,License SOP-30819-1,has Resigned from Position with Ilpr Effective 990813.Status of License Should Be Changed to Expired,Effective 990813 U-603250, Notifies NRC That Ma Freihofer (License SOP-31296-1) Has Resigned from Position with Illinois Power Effective 990729 & License Status Should Be Changed to Expired Effective 9907291999-08-10010 August 1999 Notifies NRC That Ma Freihofer (License SOP-31296-1) Has Resigned from Position with Illinois Power Effective 990729 & License Status Should Be Changed to Expired Effective 990729 U-603249, Notifies NRC That He Bouska (License SOP-3055-1) Has Resigned from Position with Illnois Power Effective 990809. & License Status Should Be Changed to Expired Effective 9908091999-08-10010 August 1999 Notifies NRC That He Bouska (License SOP-3055-1) Has Resigned from Position with Illnois Power Effective 990809. & License Status Should Be Changed to Expired Effective 990809 ML20210N2961999-08-0909 August 1999 Forwards Form of Nuclear Decommissioning Master Trust Agreement,Per CPS Application for License Transfer & Conforming Administrative License Amend U-603248, Requests Unrestricted License for Kc Scott,License SOP-31532.Scott Has Successfully Completed Facility Licensee Requirements to Be Licensed as Operator/Senior Operator Per 10CFR551999-08-0606 August 1999 Requests Unrestricted License for Kc Scott,License SOP-31532.Scott Has Successfully Completed Facility Licensee Requirements to Be Licensed as Operator/Senior Operator Per 10CFR55 U-603236, Forwards Revised Data Point Ref File Sheets for Clinton Power Station Computer Points That Input to ERDS1999-08-0202 August 1999 Forwards Revised Data Point Ref File Sheets for Clinton Power Station Computer Points That Input to ERDS ML20210J0541999-07-30030 July 1999 Forwards Three Original Signature Pages of Gr Rainey for Application for License Transfer & Conforming Administrative License Amend, for NRC Files U-603178, Forwards Four ASME Section XI Relief Requests Re Performance of non-destructive Exams for First 120-month Inservice Insp for CPS1999-07-29029 July 1999 Forwards Four ASME Section XI Relief Requests Re Performance of non-destructive Exams for First 120-month Inservice Insp for CPS U-603237, Informs That Util Will Provide Response to fire-related Questions One & Two of NRC RAI Re CPS Ipeee,By 0001311999-07-28028 July 1999 Informs That Util Will Provide Response to fire-related Questions One & Two of NRC RAI Re CPS Ipeee,By 000131 U-603240, Forwards Clinton Power Station semi-annual Fitness for Duty Rept for Period Ending 990630,IAW 10CFR26.711999-07-27027 July 1999 Forwards Clinton Power Station semi-annual Fitness for Duty Rept for Period Ending 990630,IAW 10CFR26.71 U-603235, Forwards Application for License Transfer & Conforming Administrative License Amend for OL NPF-62.Proprietary & Nonproprietary Asset Purchase Agreement Encl.Proprietary Info Withheld,Per 10CFR2.7901999-07-23023 July 1999 Forwards Application for License Transfer & Conforming Administrative License Amend for OL NPF-62.Proprietary & Nonproprietary Asset Purchase Agreement Encl.Proprietary Info Withheld,Per 10CFR2.790 U-603231, Forwards Summary of Status of Plan for Excellence (Pee) Initiatives & Clinton Power Station (CPS) 1999 Business Plan.Encl Documents Provide Status & Disposition for Actions Not Completed to Date1999-07-0707 July 1999 Forwards Summary of Status of Plan for Excellence (Pee) Initiatives & Clinton Power Station (CPS) 1999 Business Plan.Encl Documents Provide Status & Disposition for Actions Not Completed to Date U-603214, Forwards Results of Analysis Performed on Recently Completed Vendor Contracts,Per GL 83-28, Required Actions Based on Generic Implications of Salem ATWS Events1999-07-0606 July 1999 Forwards Results of Analysis Performed on Recently Completed Vendor Contracts,Per GL 83-28, Required Actions Based on Generic Implications of Salem ATWS Events U-603218, Provides Final Response to GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants. Attachment Provides Y2K Readiness Disclosure for Plant1999-06-28028 June 1999 Provides Final Response to GL 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants. Attachment Provides Y2K Readiness Disclosure for Plant U-603212, Forwards Response to NRC 990315 Telcon Re Proposed Amend of License NPF-62,implementing Feedwater Leakage Control Sys Mode of RHR Sys1999-06-24024 June 1999 Forwards Response to NRC 990315 Telcon Re Proposed Amend of License NPF-62,implementing Feedwater Leakage Control Sys Mode of RHR Sys U-603227, Provides Updated Rept on Status of Decommissioning Funding for Plant.Updated Rept Provides Min Decommissioning Fund Estimate,Per 10CFR50.75(b) & (C) Utilizing NUREG-1307,Rev 8 Methodology1999-06-24024 June 1999 Provides Updated Rept on Status of Decommissioning Funding for Plant.Updated Rept Provides Min Decommissioning Fund Estimate,Per 10CFR50.75(b) & (C) Utilizing NUREG-1307,Rev 8 Methodology 05000461/LER-1999-007, Forwards LER 99-007-00,re Design Error Causing Main Steam Isolation Valve Leakage Control Sys to Be Outside Design Basis.Commitment Made by Util,Listed1999-06-12012 June 1999 Forwards LER 99-007-00,re Design Error Causing Main Steam Isolation Valve Leakage Control Sys to Be Outside Design Basis.Commitment Made by Util,Listed 05000461/LER-1999-008, Forwards LER 99-008-00,re Failure of Motor Driven Reactor FW Pump Regulating Valve.Commitment Made by Util,Listed1999-06-12012 June 1999 Forwards LER 99-008-00,re Failure of Motor Driven Reactor FW Pump Regulating Valve.Commitment Made by Util,Listed U-603213, Responds to NRC Ltr Re Violations Noted in Insp Rept 50-461/99-01.Corrective Actions:Calculation 19-AK-05, Calculation for DG Load Monitoring, Was Revised Using Correct Horsepower for Hydrogen Mixing Compressors1999-05-28028 May 1999 Responds to NRC Ltr Re Violations Noted in Insp Rept 50-461/99-01.Corrective Actions:Calculation 19-AK-05, Calculation for DG Load Monitoring, Was Revised Using Correct Horsepower for Hydrogen Mixing Compressors ML20209G7731999-05-27027 May 1999 Forwards Copy of Final Rept for 981118,Biennial Radiological Emergency Preparedness Exercise for Clinton Nuclear Power Station.No Deficiencies Were Noted U-603207, Provides Util Rept Confirming Completion of Actions Required by NRC Bulletin 96-003, Potential Plugging of ECCS Strainers by Debris in Bwrs1999-05-13013 May 1999 Provides Util Rept Confirming Completion of Actions Required by NRC Bulletin 96-003, Potential Plugging of ECCS Strainers by Debris in Bwrs U-603201, Forwards 4-yr Updated Certification Rept for Plant Training Simulator.Nrc Form 474, Simulation Facility Certification Also Encl Which Was Developed in Accordance with Reg Guide 1.149 & Ansi/Ans Std Ansi/Ans 3.51999-05-0505 May 1999 Forwards 4-yr Updated Certification Rept for Plant Training Simulator.Nrc Form 474, Simulation Facility Certification Also Encl Which Was Developed in Accordance with Reg Guide 1.149 & Ansi/Ans Std Ansi/Ans 3.5 U-603196, Provides Notification That Util Has Completed Thermo-Lag 330-1 Fire Barrier Corrective Actions as Described in 970619 & s in Addition to Repair of Butt Joint Described in1999-04-27027 April 1999 Provides Notification That Util Has Completed Thermo-Lag 330-1 Fire Barrier Corrective Actions as Described in 970619 & s in Addition to Repair of Butt Joint Described in U-603205, Forwards Annual Radioactive Effluent Release Rept for Clinton Power Station for Period Jan-Dec 1998. Rev 17 to ODCM for Clinton Power Station, Also Encl1999-04-27027 April 1999 Forwards Annual Radioactive Effluent Release Rept for Clinton Power Station for Period Jan-Dec 1998. Rev 17 to ODCM for Clinton Power Station, Also Encl U-603197, Provides Details of Other Activities Being Taken as Part of CPS Plan for Excellence Re Ensureing That CPS Physical Plant & Functional Characteristics Are Consistent with & Are Being Maintained IAW CPS Design Bases1999-04-24024 April 1999 Provides Details of Other Activities Being Taken as Part of CPS Plan for Excellence Re Ensureing That CPS Physical Plant & Functional Characteristics Are Consistent with & Are Being Maintained IAW CPS Design Bases U-603194, Provides Notification That Ta Staber,License SOP-31298,has Resigned Position,Effective 990401.License Status Should Be Changed to Expired1999-04-15015 April 1999 Provides Notification That Ta Staber,License SOP-31298,has Resigned Position,Effective 990401.License Status Should Be Changed to Expired U-603189, Requests That Status of License SOP-31187-1,for Le Anderson, Be Changed to Expired,Per 10CFR50.74.Util Determined That Individual No Longer Has Need for SRO License1999-04-0505 April 1999 Requests That Status of License SOP-31187-1,for Le Anderson, Be Changed to Expired,Per 10CFR50.74.Util Determined That Individual No Longer Has Need for SRO License U-603190, Provides Update for Certain 10CFR50.74(f) Info Addressed in Licensee 980619 Submittal,But Not Included in Final Response1999-04-0202 April 1999 Provides Update for Certain 10CFR50.74(f) Info Addressed in Licensee 980619 Submittal,But Not Included in Final Response U-603185, Forwards Response to NRC RAI Re CPS GL 96-05, Periodic Verification of Design-Basis Capability of SR Movs, Program1999-03-30030 March 1999 Forwards Response to NRC RAI Re CPS GL 96-05, Periodic Verification of Design-Basis Capability of SR Movs, Program U-603186, Forwards Rept on Status of Clinton Power Station Decommissioning Funding,Iaw 10CFR50.75(f)1999-03-29029 March 1999 Forwards Rept on Status of Clinton Power Station Decommissioning Funding,Iaw 10CFR50.75(f) U-603184, Submits Info Re Current Levels of Property Insurance & Sources of Insurance for CPS as Listed,Per 10CFR50.54(w)(3)1999-03-26026 March 1999 Submits Info Re Current Levels of Property Insurance & Sources of Insurance for CPS as Listed,Per 10CFR50.54(w)(3) 05000461/LER-1999-005, Forwards LER 99-005-00,re Inoperability of Standby Gas Treatment Sys Train a Caused by Inadequate Design of Control Circuit.Commitments Listed1999-03-15015 March 1999 Forwards LER 99-005-00,re Inoperability of Standby Gas Treatment Sys Train a Caused by Inadequate Design of Control Circuit.Commitments Listed U-603165, Forwards Revised Data Point Ref File Sheet for Clinton Power Station Computer Point That Inputs to Erds.Change Necessary to Support Plant Mods to Drywell Floor Drain Instrumentation1999-03-12012 March 1999 Forwards Revised Data Point Ref File Sheet for Clinton Power Station Computer Point That Inputs to Erds.Change Necessary to Support Plant Mods to Drywell Floor Drain Instrumentation U-603179, Provides Notification That RG Giuliani & R Zacholski,No Longer Have Need for Operating License.License Status Is Therefore Requested to Be Changed to Expired1999-03-10010 March 1999 Provides Notification That RG Giuliani & R Zacholski,No Longer Have Need for Operating License.License Status Is Therefore Requested to Be Changed to Expired 1999-09-22
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liknots Power Company Chnton Power Station P o. Box 678 Chnton,IL 61727 Tel 217 935-8881 Joseph V. Sipek g Director - Licensing w~ aww U-603178 8E.100c July 29, 1999 Docket No. 50-461 10CFR50.55a Document Control Desk i Nuclear Regulatory Commission l Washington, D.C. 20555
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Subject:
Submittal of Four ASME Section XI Relief Requests Regarding Performance of Non-Destructive Examinations for the First 120-Month Inservice Inspection Interval for Clinton Power Station
Dear Madam or Sir:
Attached for NRC review and approval are four requests for relief from the requirements of Section XI of the American Society of Mechanical Engineers (ASME)
Boiler and Pressure Vessel Code,1980 Edition through Winter 1981 Addenda, with regard to the performance of non-destructive examination of welds for the first 120-month inservice inspection interval for Clinton Power Station (CPS). Contained within each relief request are the details concerning the applicable ASME Section XI Code requirements and the affected welds, as well as the basis and justification for the requested relief.
Inservice inspection of ASME Code Class 1, 2, and 3 components is required to be performed in accordance with Section XI of the ASME Code pursuant to 10CFR50.55a(g) except where specific written relief has been granted by the Commission. Per 10CFR50.55a(gX5), if a licensee determines that conformance with l certain requirements of Section XI of the ASME Code is not practical, information shall I
be submitted to the NRC in support of that determination and a request made for relief from the ASME Code requirement. Further,10CFR50.55a(aX3) states that alternatives to the requirements of 10CFR50.55a(g) may be used, when authorized by the NRC, if l
the proposed alternatives would provide an acceptable level of quality and ssfety, or compliance with the specified requirements would result in hardship or unusual difficulties without a compensating increase in the level of quality and safety. The attached relief requests (Attachments 1 through 4 of this letter) are accordingly submitted for NRC review and approval pursuant to the requirements of l ;
10CFR50.55a(g)(5) and 10CFR50.55a(gX6Xii)(A)(5). The applicable edition of Section XI of the ASME Code for the first 120-month inservice inspection (ISI) interval i at CPS is the 1980 Edition through Winter 1981 Addenda. y 9909030079 990729 9 PDR ADOCK 050004617
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f U-603178 Page 2 i
A brief description of each relief request (along with the corresponding attachment number to this letter) is provided below:
Relief Reauest No. Attachment No. Description i
4014 1 This is a request to allow a reduction in the required volumetric examination volume for nine (9) reactor l pressure vessel (RPV) nozzle-to-shell welds (Code l Class 1, Examination Category B-D, Item B3.90). A I
portion of the Code required examination volume cannot be completed due to the RPV nozzle )
configuration / geometry.
4015 2 This is a request to allow a reduction in the required volumetric examination volume for RPV shell-to-flange weld number RPV-C5 (Code Class 1, Examination Category B-A, Item Bl.30). A portion of the Code required examination volume cannot be completed due to the RPV shell flange configuration / geometry. 1 i
4016 3 This is a request to allow a reduction in the required J volumetric examination volume for RPV longitudinal weld numbers RPV-V2B and RPV-V2C (Code Class 1, Examination Category B-A, Item Bl.12). Reliefis requested since examination of the remainder of the weld would require erecting scaffolding or a platform in a very high radiation area.
4017 4 This is a request to allow a reduction in the required volumetric examination volume for the bottom head-to-shell Course No. I weld number RPV-Cl (Code Class 1, Examination Category B-A, Item Bl.11). A portion of the Code required examination volume cannot be completed due to the bottom head-to-shell Course No. I weld configuration / geometry and location where the RPV skirt is welded to the bottom head. !
l It should be noted that the nine specific welds identified in Relief Request No.
l 4014 and the two welds identified in Relief Request No. 4016 were previously submitted '
as part of Relief Request No. 4006 and part of Relief Request No. 4010, respectively, in )
IP letter dated June 5,1996 (U-602566). By letter dated December 4,1996, the NRC 1 informed IP of the Staff's determination regarding the relief requested in the IP June 5, 1 1996 letter. Specifically, the Staff denied Relief Request No. 4006 (in part) and Relief i i
U-603178 Page 3 Request No. 4010 (in its entirety) on the basis that it was inappropriate to grant relief prior to the subject welds being examined. Subsequently, IP has performed the required examinations of the welds identified in Relief Request Nc. 4014 and No. 4016 to the maximum extent practical. As such, IP is now seeking relief from the requirement to perform a complete volumetric examination for the subject welds as described in the attached ReliefRequests.
The IP June 5,1996 letter also included requests for relief that were approved by the NRC. Specifically, Relief Request No. 4005 was approved, as identified in the NRC letter dated December 4,1996. This is noted because Relief Request No. 4015 and No.
4017 (as attached) are comparable to Relief Request No. 4005 with respect to the relief requested, the types of welds involved, and the reasons why 100% of the weld volume l could not be examined.
Sincerely yours, Jo ph . Si Di ector-Licensing EET/krk Attachments cc: NRC Clinton Licensing Project Manager NRC Resident Office, V-690 Regional Administretor, Region III, USNRC Illinois Department of Nuclear Safety l
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Attachment 1 to U-603178 I Page 1 of 6 1
l ILLINOIS POWER COMPANY Clinton Power Station ASME Section XI Relief Request RELIEF REQUEST 4014 (Revision 0) l l
l Nine (9) reactor pressure vessel (RPV) novic-to-shell l SYSTEM / COMPONENT (S) FOR WHICH RELIEF welds, Code Class 1, Examination Category B-D, item IS REQUESTED B3.90. See attached Table i for wcld numbers.
l ASME Section XI,1980 Edition thru Winter 1981 CODE REQUIREMEVr Addenda, Table IWB-2500-1, Category B-D, item B3.90 requires volumetric cumination of the wcld and adjacent base material as defined by Figure IWB-2500-7(b)
For cach of the identified nonJc-to-shell welds, relief is CODE REQUIREMENT FROM WHICH RELIEF IS requested from performing complete volumetric REQUESTED examination of the required volume which is restricted due to scanning limitations presented by the RPV noule configuratica/gcometry. Attached Figure lA through IC depict a typical RPV nonic weld, what portion of the examination volume is restricted by nonle configuration / geometry, and how that restriction affects the percentage of the volume that can be examined by each of the various examination techniques (0 L-Wave,45 P-Scan,60 T-Scan, etc.).
Attached Table 1 identifies the estimates of the composite Code cumination vc,lume that have been examined for caco of the subject RPV noalc welds.
A portion of the Code required examination solume cannot BASIS FOR RELIEF be completed due to the RPV nonlc configuration / geometry. Attached Figures l A through IC identify the limitations presented by a typical RPV nonic configuration / geometry for cach examination technique employed at Clinton Power Station (CPS).
Illinois Power Company (IP) perfonned ultrasonic ALTERNATE EXAMINATIONS cxamination of these welds to the maximum extent feasible for the required examination solume.
Performance of ultrasonic examination of approximately 65 JUSTIFICATION FOR THE GRANTING OF percent of the required examination volume for cach of the RELIEF nine identified welds provides reasonable assurance of the stmetural integrity of each entire weld. Altogether, there are twenty-nine (29) RPV nonlc-to-shell welds requiring ultrasonic examination. During two previous refueling outages (RF-2 and RF-4) IP performed ultrasonic examination on twenty (20) of these welds. These ultrasonic examinations did not cover 100% of the required examination volume of each of these 20 welds. There were no unacceptable indications in the areas examined. IP submitted a relief request (Relief Request 4006, IP letter U402566 dated June 5,19%) for these welds, which was approved by the NRC (for the twenty examinations performed in two previous outages) to [ctmit examination ofless than the minimum required wcld examination volume.
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At tachtnent 1 to U-603178 Page 2 of 6
. Tie remaining nine (9) welds were examined during refueling outage RF-6 and no unwentable indication identified.
The examination cmtrage for each of these nine (9) welds is approximately the same as for the twenty (20) welds xlentdied in Relief Request 4006. It should be noted that during initial plant construction, all of these welds were
, rhiivyop64 and the results were acceptabic. These welds were also ultrasonically examined in accordance with the l- Presenice Inspection Plan, and the results of those exammations were also acceptable.
ASME Section V, Article 4, requires that the examination volume (weld and adjacent base material) be scanned by straight and angle beam,45* and 60*, techniques. Article 4 of ASME Sxuon V allows the examination to be performed from one side of the weld. Due to the RPV nozzle configuration, ultrasonic examination can only be performed from the shcIl side. Due to tie bend radius and thickness of the nozzle, tie following examination volumes were scanned using the techniques listed below (not taking beam spread into account):
1 1 Techniaue % of Exarnination Volume Examined i
0* L-Wave 50 %
45'P-Scan Clockwise 60 %
l 60*P-Scan Clockwise 60 %
l 45'P-Scan Counter Clockwise 60 %
1 60*P-Scan Counter Clockwise 60 %
45 T-Scan Shell Side 80 %
1 . 60* T-Scan Shell Side 88 %
Composite examination volume = 65%
It should be noted that the outer 1/4" volume was excluded from this determination of examination volume because of inherent properties of the ultrasonic examination metixxis near-surface effect.
As shown above, at least one technique (60 T-Scan) cmcrs close to 90% of the exanunation volume. Illinois Power Company believes that the actual area exanuned using tie 45* T-Scan and 60* T-Scan tecimiques was mer 90%,
however, if any indication would have been present in the area identified as not examined, it would have been difficult to size. For this reason, the examiner has identified 80% and 88 % cmtrage for 45 T-Scan and 60 T-Scan techniques respectively. It should be noted that the ASME, per Code Case N-460 considers 90% cmerage as meeting the Code requirements. Code Case N-460 has been incorporated into Regulatory Guide 1,147.
Tie examination limitation imposed by the RPV nozzic/shell configuration makes it impractical to perfonn a complete i volumetric examination (90% or more) of the nozzle-to-shell welds. However, IP believes that performance of ultrasonic !
examination of the welds to the maximum extent feasib'e (for a composite examination volume of approximately 65%) is
. suflicient for confirming weld integrity anxi therefore prmides an acceptable lesti of quality and safety. j Reliefis requested for the first ten-year interval at CPS.
IMPLEMENTATION SCHEDULE .
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to U-603178 l Page 3 of 6 l
l TABLE 1 CODE CATEGORY B-D 1
EXAMINATION COVERAGE Estimated Percentage Of l
Volume Examined Due
% eld Number Description To Nonle Confieuration j f
N2A, N2H, N21, N2K RecirculationInlet Nozzles 65 N3B,N3D Main Steam Nor21cs 67 NSB Core Spray Nozzle 63 N6A RHR CoolantInjection Nonle 65 N9B Jet Pump Instrument Nozzle 66 1 l
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Attachment 2
, to U-603178 Page 1 of 3 ILLINOIS POWER COMPANY Clinton Power Station ASME Section XI Relief Request RELIEF REQUEST 4015 (Revision 0)
Reactor Pressure Vessel (RPV) shell-to-flange weld, Code SYSTEM / COMPONENT (S) FOR WHICH RELIEF Class 1, Examination Category B-A, item Bl.30, wcld IS REQUESTED rumber RPV-C5. t ASME Section XI,1980 Edition through Winter 1981 CODE REQUIREMENT Addenda, Table IWB-2500-1, Category B-A, Item Bl.30 l requires a volumetric examination of the weld and adjacent i wcld material as dermed by Figure IWB-2500-4.
Relief is requested from performing 100% volumetric CODE REQUIREMENT FROM WHICH RELIEF IS examination cf the examination volume which is restricted REQUESTED due to scanning limitations presented by the RPV shcIl flange configuration /gcometry and inherent near-surface effects of ultrasonic examinations. It is estimated that 52% of the composite codc cumination volume has ba:n examined by ultrasonic examination. See attached Figure 1.
A portion of the Code required cumination volume cannot l BASIS FOR RELIEF be completed due to the RPV shcIl flange configuration /
geometry. Figure 1 identifics the geometrical limitation presented by the RPV shcIl flange with respect to the various ultrasonic cumination techniques performed on the RPV shcIl to flange weld.
Illinois Power Company (IP) completM ultrasonic ALTERNATE EXAMINATIONS examination of this wcld to the maximum extent feasible for the required cumination volume.
Performance of approximately 52% of the required JUSTIFICATION FOR THE GRANTING OF cxamination volume provides reasonable assurance of the RELIEF structural integrity of the entire weld. Based on the examination conducted, no unacceptable indications were found. It should be noted that during initial plant construction, this wcld was radiographed and the results were acceptable. The wcld was also ultrasonically cumined in accordance with the Preservice Inspection Plan, and the results of that cumination were also acceptable.
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Attachment 2 to U-603178 Page 2 of 3 ASME Section V, Article 4, requues that tie examination solume (weld and adjacent base material) be scanned by ,
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. straight and angle beam,45 ' and 60 ', techmques. Article 4 of ASME Section V allows the examination to be performed from ore side of the wel6 Due to the flange configuration, ultrasonic exandnation can only be perfonned from the shell side oithe weld. Due to the bend radius on the flange side and the thickness of the flange, only the following examination i miumes can be scanned for the techmques listed below (not taking beam spread into account):
Techniaue % of Examination Volume Examined j 0*l-Waw 58 %
l 45* T-Scan Upstream Side 85 %
i 60* T-Scan Upstream Side 89 %
45'T-Scan Downstream Side 0%
60*T-Scan Downstream Side 0% I l 45'P-Scan Counter Clockwise 60 %
60*P-Scan Counter Clockwise 60 %
45* P-Scan Clockwise 60 %
60* P-Scan Clockwise 60 %
Composite examination volume = 52%
l It should be noted that the outer 1/4" volume was excluded from this determination of examination mlume because of l interent properties of the ultrasonic examination method's near-surface effect.
l As shown abme, at least one to:hnique (60* T-Scan) cmcrs close to 90% of the examination volume. Illinois Power
! Company believes that the actual area examined using t:e 60' T-Scan was mer 90% becruse Illinois Power assumes the l outer 1/4" was not exanuned due to near zone effects of ultrasonic method This is a wry consenative assumption, in l fact, only a smaller portion versus 1/4" close to the surface is not examined. Similarly lilinois Power believes that the actual area examined using 45' T-scan was mer 90% It should be noted that the ASME considers 90% cmcrage to be acceptable per Code Case N-460. Code Case N 460 has been incorporated into Regulatory Guide 1.147.
The examination limitation imposed t.y the RPV flange configuration makes it impractical to perform a complete volumetric examination (90% or more) of the weld. However based on the e . amination performed, IP beliews that the structural integrity of the wcld is confirmed and prmides an acceptable level of quality and safety.
Rehefis requested for the first ten-year intenal at Clinton IMPLEMENTATION SCHEDULE Power Station.
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Attachment 3 l to U-603178 l Page 1 of 2 ILLINOIS POWER COMPANY Clinton Power Station l ASME Section XI Relief Request 1
RELIEF REQUEST 4016 (Resision 0) 1 Two (2) Reactor Pressure Vessel (RPV) longitudinal utids, SYSTLM/ COMPONENT (S) FOR WHICH RELIEF Code Class 1, Examination Category B-A, item Bl.12, 15 REQUbsID wcld numbers RPV-V2B and RPV-V2C.
ASME Section XI,1980 Edition through Winter 1981 CODE REQUIREMENT Addenda, Table IWB-2500-1, Category B-A, item Bl.12 requires a volumetric examination of ticsc welds and adjacent matenal as defined by Figure IWB-2500-2.
I Reliefis requested from perfonning ultrasonic examination CODE REQUIREMENT FROM WHICH RELIEF IS of approximately 4% of the cumination volume since only REQUESTED 91% of the required examination volume can be examined by automated ultrasonic examination equipment and approximately 5% of the cumination volume can be exempted by ASME Code Case N460 due to instrmnent nozzle (N12C and D) interference.
In order to perform manual ultrasonic examination of 4%
BASIS FOR RELIEF cumination volume, temporary platforms (or large ,
scaffolding) would have to be installed adjacent to the reactor inside the bioshield arca which is a very high radiation zone.
Illinois Power Company (IP) completed ultrasonic ALTERNATE EXAMINATIONS cxamination of these welds to the nnximum extent feasible for the required cumination volume.
Performance of ultrasonic examination of 91% of the JUSTIFICATION FOR THE GRANTING OF required examination vohunc provides reasonable RELIEF assurance of the structural integnty of the entire weld. The results of 91% of the examination volume were acceptable During initial plant constmetion, the entire welds were radiographed and the resul?s were acceptabic. The welds were also ultrasanically examined in accordance with the Presenice Inspection Plan, and the results of that examination were also acceptable.
To perform the remaining 9% of the code required examination would require crecting scaffolding /platfonn in the scry high radiation area. The dose rate in this area during our most recent outage were approximately 3000 mR/hr measured at the N12 nozzles. It is estimated that performing manual examinations of the areas not restricted by N12 nozz!cs would bring the total coverage to 95% The hazards involved in this additional examination (only 4%) as well as the dose fields encoun'ered do not warrant performing this additional cumination to obtain an additional 4% costrage. It should be noted that the outer 1/4" volume was excluded from this determination of cumination volume because of inherent properties of ultrasonic examination methods near-smface effect.
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r Attachment 3
.' - ' to U-603178 Page 2 of 2 ASME Code Case N-460 has been adopted into Regulatory Guide 1.147, Rm.11 dated October,1994. This Code Case
. allows a reduction of tic exanunation area ofless than 10% due to interference by anotler component or part geometry.
This Code Case allows lilinois Power to not perform the 5% of the examination volume restricted by N12 no721cs, howner, it does not allow the remaining 4% of tic examination mlume to be not performed. Another 4% reduction in the exammation area for these welds wwld not significantly impact tic effectheness of the examination and thus simuld not mmpromise safety.
Reliefis requested for the first ten-> tar interval at Clinton IMPLEMENTATION SCHEDULE Power Station.
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Attachment 4 to U-603178 Page 1 of 2 i
I l ILLINOIS POWER COMPANY l Clinton Power Station 1
ASME Section XI Relief Request l
RELIEF REQUEST 4017 (Resision 0)
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Reactor Pressure Vessel (RPV) bottom head to simll course SYSTEM / COMPONENT (S) FOR WHICH RELIEF number I weld, Code Class 1, Examination Category B-A, IS REOiIESTED item Bl.11, wcld number RPV-CI.
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ASME Section XI,1980 Edition through Winter 1981 CODE REQUIREMENT Addenda, Table IWB-2500-1, Category B-A, Item Bl.Il requires a mlumetric examination of the utid and adjacent wcld material as defined by Figure IWB-2500-1.
Reliefis requested from performing ultrasonic examination CODE REQUIREMENT FROM WHICH RELIEF IS of approximately 9% of the examination volume since 81%
REQUESTED of the required exandnation volume can be cumined by ultrasonic examination and a limit of 10% of the total
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cxamination volume can be exempted by ASME Code Case N-460 due to the wcld configuration.
A portion of the Code irquired exandnation volume cannot BASIS FORRELIEF be completed due to the bottom head to shcil course number I weld configuration /gcometry and location where RPV skirt is welded to the bottom head.
Illinois Power Company (IP) completed ultrasonic ALTERNATE EXAMINATIONS cxamination of this wcld to the maximum extent feasible for the required cundnation volume.
Performance of ultrasonic examination of approximately JUSTIFICATION FOR THE GRANTING OF 81% of the required examination volume provides RELIEF reasonable assurance of the stmetural integrity of the entire weld. During plant construction, the entire wcld was mdiographed and the results were acceptable. The wcld was also ultrasonically examined in accordance with the Picsenice Inspection Plan, and the results of that exandnation were also acceptable. Tim remaining 19% of the exandnation volume cannot be performed due to the wcld configuration / geometry and location where RPV skirt is wclded to the bottom head. Code Case N-460, Alternative Examination Coverage for Class 1 and Class 2 welds, allows lilinois Power to reduce the exandnation coverage of up to 10% due to the component geometry.11 crefore, only 9% of tic code required cumination was not performed.
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e ,. . Attachment 4 to U-603178 Page 2 of 2 ASME Secten V, Article 4, requires that the exanunation solume (weld and adjacent base material) be scanned by
, straight.and angle beam,45
- and 60 *, techniques. Due to the weld configuration / geometry and loanion where RPV skirt is welded to the bottom head, the following exammation solumes can be scanned using the techniques listed below:
Ta:hnioue %of Examination Volume Examined 0* L-Wave %%
45* T-Scan Downstream Side 94 %
45'T-Scan Upstream Side 72 %
60 T-Scan Downstream Side 88 %
60 T-Scan Upstream Side 40 %
' 45' P-Scan Clockwise 72 %
45' P-Scan Counter Clockwise %%
60* P-Scan Clockwise 72 %
60* P-Scan Counter Clockwise %%
Composite examination volume = 81%
It should be noted that approximately 4% (the outer 1/4" volume) of the volume was not examined, due to inherent UT properties of near zone effect, and it is not included in the abmt determination of examination solume.
As shown abme, at least four (4) tecluuques (0* L-Wave,45* T-Scan Downstream,45* P-Scan Counter Clockwise, and 60* P-Scan Counter Clockwise) cmer mer 90% of the exanunation solume. Illinois Power belieses that the actual area exanuned using other techniques was more than what is identified abme, ha mer, if any indication would hase been present in the area identified as not examined, it would have been difrx: ult to size. For this reason, the exarniner identified lesser cmtrage for these techniques. It should be noted that the ASME, per Code Case N-460, considers 90% coverage as meeting the code requirements. Code Case N-460 has been incorporated into Regulatory Guide 1.147.
The exammation limitation unposed by this geometry / configuration makes it impractical to perform a complete solumetric examination (90% or more). However, Illinois Power beliests that performance of ultrasonic examination of the weld to the maximum extent feasible (for a composite examination volume of approximately 81%) is sufficient for conftrming weld integrity and that such examination therefore prmides an acceptable lesel of quality and safety.
Reliefis requested for the first ten-year interval at Clinton IMPLEMENTATION SCHEDULE Power Station.
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