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Category:- No Document Type Applies
MONTHYEARML24275A0452024-09-24024 September 2024 Procedure Review Form - EOF Notification Package ML24275A0482024-09-24024 September 2024 Procedure Review Form - Callaway, Control Room Notification Flowchart ML24256A0762024-07-25025 July 2024 Review Form - Radiological Emergency Response Plan (RERP) ML24256A0792024-07-0101 July 2024 Review Form - Activation and Operation of the Joint Information Center ML24256A0712024-07-0101 July 2024 Review Form - Emergency Implementing Actions ML24086A3722024-02-13013 February 2024 EIP-ZZ-C0010 Addendum C R013 PRF: Plant Assessment Coordinator (Pac) Checklist ML23341A1902023-12-0707 December 2023 Enclosujustification for Exemption Request from Specific Requirements in 2023 Security Rule ML23354A1132023-10-26026 October 2023 Off-Site Liaison Coordinator Checklist ML23354A1112023-10-26026 October 2023 Logistics Support Coordinator Checklist ML23354A1092023-10-26026 October 2023 Protective Measures Coordinator Checklist ML24002A8132023-07-25025 July 2023 EIP-ZZ-00240 Add E, Rev. 28, Health Physics Coordinator (Hpc) Checklist ML23150A1872023-05-18018 May 2023 Submittal of EIP-ZZ-00240 Addendum H, Revision 008, Security Coordinator Checklist ML23164A0262023-05-18018 May 2023 Procedure Review Form - Emergency Coordinator (EC) Checklist ML23150A1902023-05-18018 May 2023 Submittal of EIP-ZZ-00245 Addendum H, Revision 004, Security Coordinator Checklist for the Alternate Tsc/Osa Assembly Area ML22153A1922022-06-0202 June 2022 Enclosure 3 - List of Commitments ML22034A3972022-02-16016 February 2022 Enclosure 2 - IP 92707 CY2021 - IR 8 Baseline Inspection Completion ML22034A3952022-02-16016 February 2022 Enclosure 3 - IP 96001 CY2021 - IR 8 Baseline Inspection Completion ML22034A3992022-02-16016 February 2022 Enclosure 1 - IP 71130.03 Cy 2021 - IR 8 Baseline Inspection Completion ML21335A4622021-12-0101 December 2021 Enclosure 10: ARCON96-NAI Output Summary Logs ML21335A4632021-12-0101 December 2021 Enclosure 11: ARCON96-NAI Output Cumulative Frequency Distribution Results ML21335A4542021-12-0101 December 2021 Enclosure 2: Full Scope Implementation of Alternative Source Term - Evaluation of Proposed Changes ML21335A4612021-12-0101 December 2021 Enclosure 9: ARCON96-NAI Input Run Specifications ML21335A4642021-12-0101 December 2021 Enclosure 12: PAVAN-NAI Input Meteorological Data and Run Specifications for Reactor Building and Refueling Water Storage Tank Releases Evaluated at Exclusion Area Boundary and Low Population Zone Boundary ML21335A4652021-12-0101 December 2021 Enclosure 13: PAVAN-NAI Output for Reactor Building and Refueling Water Storage Tank Releases Evaluated at Exclusion Area Boundary and Low Population Zone Boundary ML21335A4662021-12-0101 December 2021 Enclosure 14: Summary of Differences Between ARCON96 and ARCON96-NAI and Between Pavan and PAVAN-NAI Codes ML21090A1892021-03-31031 March 2021 Enclosure 4 - Acronyms and Definitions ULNRC-06604, Enclosure - Callaway Energy Center Form OAR-1 Owner'S Activity Report2020-10-22022 October 2020 Enclosure - Callaway Energy Center Form OAR-1 Owner'S Activity Report ML20080H2382020-03-17017 March 2020 Enclosure - Nuclear Property Insurance NRC Property Rule 10 CFR 50.54(W) Reporting Requirements ML19325D6712019-11-21021 November 2019 Attachment 1 - Callaway Regulatory Commitment Update ML19225D3232019-08-12012 August 2019 Attachment 1 - List of Regulatory Commitments ML19024A4712019-01-23023 January 2019 Attachment 1 - NRC Audit Questions and Responses ML19024A4752019-01-23023 January 2019 Attachment 5 - List of Regulatory Commitments ML17097A5672017-04-0101 April 2017 joy-nv Callaway, Unit 1 - Enclosure 5 to ULNRC-06349 - Application for Approval of Decommissioning Cost Estimate for Callaway Energy Center and Funding Level of Nuclear Decommissioning Trust Fund ULNRC-06349, joy-nv Callaway, Unit 1 - Enclosure 5 to ULNRC-06349 - Application for Approval of Decommissioning Cost Estimate for Callaway Energy Center and Funding Level of Nuclear Decommissioning Trust Fund2017-04-0101 April 2017 joy-nv Callaway, Unit 1 - Enclosure 5 to ULNRC-06349 - Application for Approval of Decommissioning Cost Estimate for Callaway Energy Center and Funding Level of Nuclear Decommissioning Trust Fund ML17362A0642017-02-10010 February 2017 Enclosure 7: Ameren Corporation by - Laws Effective 02/10/2017 ULNRC-06400, Enclosure 7: Ameren Corporation by - Laws Effective 02/10/20172017-02-10010 February 2017 Enclosure 7: Ameren Corporation by - Laws Effective 02/10/2017 ML17097A5662016-12-31031 December 2016 Enclosure 4 to ULNRC-06349 - Statement of Net Assets Available for Benefits ULNRC-06349, Callaway, Unit 1 - Enclosure 4 to ULNRC-06349 - Statement of Net Assets Available for Benefits2016-12-31031 December 2016 Callaway, Unit 1 - Enclosure 4 to ULNRC-06349 - Statement of Net Assets Available for Benefits ML16348A3762016-12-13013 December 2016 Enclosure 3 - 2016 Proxy Statement of Ameren Corporation ULNRC-06341, Callaway Plant Unit 1 - Enclosure 3 - 2016 Proxy Statement of Ameren Corporation2016-12-13013 December 2016 Callaway Plant Unit 1 - Enclosure 3 - 2016 Proxy Statement of Ameren Corporation ULNRC-06341, Callaway Plant Unit 1 - Enclosure 8 - 10-Q Filed Period 9/30/20162016-09-30030 September 2016 Callaway Plant Unit 1 - Enclosure 8 - 10-Q Filed Period 9/30/2016 ML16348A3822016-09-30030 September 2016 Enclosure 8 - 10-Q Filed Period 9/30/2016 ML16348A3812016-06-30030 June 2016 Enclosure 7 - 10-Q Filed Period 6/30/2016 ULNRC-06341, Callaway Plant Unit 1 - Enclosure 7 - 10-Q Filed Period 6/30/20162016-06-30030 June 2016 Callaway Plant Unit 1 - Enclosure 7 - 10-Q Filed Period 6/30/2016 ML16348A3802016-03-31031 March 2016 Enclosure 6 - 10-Q Filed Period 3/31/2016 ML16348A3882016-03-31031 March 2016 Enclosure 14 - Schedule 14C Information for Union Electric Company - March 2016 ULNRC-06341, Callaway Plant Unit 1 - Enclosure 6 - 10-Q Filed Period 3/31/20162016-03-31031 March 2016 Callaway Plant Unit 1 - Enclosure 6 - 10-Q Filed Period 3/31/2016 ULNRC-06341, Callaway Plant Unit 1 - Enclosure 14 - Schedule 14C Information for Union Electric Company - March 20162016-03-31031 March 2016 Callaway Plant Unit 1 - Enclosure 14 - Schedule 14C Information for Union Electric Company - March 2016 ML17097A5682016-03-30030 March 2016 Enclosure 6 to ULNRC-06349 - Non-Unanimous Stipulation and Agreement ULNRC-06349, Callaway, Unit 1 - Enclosure 6 to ULNRC-06349 - Non-Unanimous Stipulation and Agreement2016-03-30030 March 2016 Callaway, Unit 1 - Enclosure 6 to ULNRC-06349 - Non-Unanimous Stipulation and Agreement 2024-09-24
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ULNRC-06066 December 20, 2013 Page 1 of 3
CALLAWAY PLANT UNIT 1 LICENSE RENEWAL APPLICATION
REQUEST FOR ADDITIONAL INFORMATION (RAI) Set #15 RESPONSES Supplement to RAI B2.1.7-5a
ULNRC-06066 December 20, 2013 Page 2 of 3
RAI B2.1.7-5a
Background:
AMP XI.M17, "acceptance criteria" states that corrective actions should be considered if the minimum allowed wall thickness will be reached before the next scheduled outage. Callaway's implementing procedure for this AMP, EDP-ZZ-01115, "Flow-Accelerated Corrosion of Piping and Components Predictive Performance Manual," defines the design minimum wall thickness (TDMW) as the calculated minimum wall thickness required as determined from the primary stress equations of the applicable construction code and predicates actions based on that value. RAI B2.1.7-5 requested information regarding the use of certified test material report (CMTR) data to reduce the minimum wall thicknesses for American Society of Mechanical Engineers (ASME) Code Class 2 and Class 3 and American National Standards Institute (ANSI) B31.11 application as given in Design Guide ME013, "Pipewall Thickness."
The RAI response stated that the bases for determining the allowable stress limits are defined in ASME Section III, Appendix III, Article 3000, and would be applicable to situations where acceptance limits must be established for materials that are not listed in the stress tables. Based on this concept, the applicant stated that CMTR data can be applied when the documented material strength is greater than the minimum required strength for that particular standard, and that use of CMTR data does not result in any reduction of conservatism. The response also stated that engineering evaluations performed on components for reduced thickness or unanticipated loads are beyond the scope of ASME Section III, and that such evaluations should be based on engineering judgment.
Issue: Engineering evaluations that determine operability of components due to degraded conditions, such as reduced thickness or unanticipated loads, should be consistent with the NRC Inspection Manual, Part 9900, "Operability Determinations & Functionality Assessments for Resolution of Degraded or Nonconforming Conditions Adverse to Quality or Safety." As noted in the above guidance, a nonconforming condition occurs when a component does not conform to all aspects of its CLB, including applicable codes. The ASME Code,Section III, for Class 2 and Class 3 and ANSI B31.1 Piping Code consistently state that the allowable stress values to be used for the design of piping systems are given in the tables of either, ASME Section II, Part D "Maximum Allowable Stress Values," or ANSI Appendix A, "Allowable Stress Tables." Although the ASME Code may provide guidance for establishing acceptance limits for materials not listed in the allowable stress tables, the Code does not address the use of CMTR data for materials that are listed in the allowable stress tables. It is not clear to the staff whether the use of CMTR data to increase the allowable stress values is in accordance with Callaway's CLB. In addition, the staff noted that Design Guide ME013 also stated the allowable stresses may be increased by 10 percent above the ASME Code specified allowable stress. It is unclear to the staff whether this increase in allowable stress values above those used in the original code of construction are in accordance with Callaway's CLB.
ULNRC-06066 December 20, 2013 Page 3 of 3 Request: Provide the documentation, either NRC-approved code cases or CLB information that establishes the use of certified test material report data to increase the allowable stresses above the values given for materials listed in the allowable stress tables for the applicable code of construction. Provide similar documentation regarding the use of the 10 percent increase given in Design Guide ME013. Alternatively, provide the limitations on the applicability for the use of this approach for evaluations of degraded conditions during the period of extended operation.
Callaway Response Callaway Engineering Design Guide ME-013, "Pipewall Thickness," has been revised to limit applicability of the use of Certified Material Test Reports (CMTRs). The Purpose, Scope, and Methodology sections each limit the use of CMTR material stresses to Operability Determinations and evaluations used to support continued plant operation until repairs can be implemented. Callaway does not use CMTRs in the design of piping systems or to increase the allowable stress above values given for materials listed in the allowable stress tables. Similarly, Callaway Engineering Design Guide ME-013, "Pipewall Thickness," has been revised to limit the use of a 10 percent increase in allowable stresses for the purpose of evaluating the wall thickness requirements of piping and components where a local discontinuity or local wall thinning occurs or is suspected to occur, and to support evaluation of reduced wall thickness due to corrosion and erosion to support continued plant operation until repairs can be implemented. The guide is not used for the design of piping, piping systems, or components. Corresponding Amendment Changes No changes to the License Renewal Application (LRA) are needed as a result of this response.
No changes to the License Renewal Application (LRA) are needed as a result of this supplemental response.