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Category:Annual Report
MONTHYEARML22349A6282022-12-15015 December 2022 Enclosure 4 - 2021 Annual Report (Filed 2/23/2022, Includes 2021 Form 10-K) ML20353A3602020-12-17017 December 2020 Enclosure 4 - 2019 Annual Report (Filed 2/28/2019 Includes 2019 Form 10-K) ML20353A3692020-09-30030 September 2020 Enclosure 11 - 10-Q Filed Period 09/30/2020 ML20353A3682020-06-30030 June 2020 Enclosure 10 - 10-Q Filed Period 06/30/2020 ML20353A3672020-03-31031 March 2020 Enclosure 9 - 10-Q Filed Period 03/31/2020 ML20353A3722020-03-31031 March 2020 Enclosure 14 - Schedule 14C Information for Union Electric Company - March 2020 ML20353A3662020-02-28028 February 2020 Enclosure 8 - 10-K Filed 02/28/2020 ML17362A0592017-12-14014 December 2017 Enclosure 4: Ameren Corp - 2016 Annual Report (Filed 02/28/2017 Includes 2016 Form 10-K) ULNRC-06400, Enclosure 4: Ameren Corp - 2016 Annual Report (Filed 02/28/2017 Includes 2016 Form 10-K)2017-12-14014 December 2017 Enclosure 4: Ameren Corp - 2016 Annual Report (Filed 02/28/2017 Includes 2016 Form 10-K) ML17362A0692017-09-30030 September 2017 Enclosure 11: Ameren Corporation - 10-Q Filed Period 09/30/2017 ULNRC-06400, Enclosure 11: Ameren Corporation - 10-Q Filed Period 09/30/20172017-09-30030 September 2017 Enclosure 11: Ameren Corporation - 10-Q Filed Period 09/30/2017 ML17362A0682017-06-30030 June 2017 Enclosure 10: Ameren Corporation - 10-Q Filed Period 06/30/2017 ULNRC-06400, Enclosure 10: Ameren Corporation - 10-Q Filed Period 06/30/20172017-06-30030 June 2017 Enclosure 10: Ameren Corporation - 10-Q Filed Period 06/30/2017 ML17362A0662017-03-31031 March 2017 Enclosure 9: Ameren Corporation - 10-Q Filed Period 03/31/2017 ULNRC-06400, Enclosure 9: Ameren Corporation - 10-Q Filed Period 03/31/20172017-03-31031 March 2017 Enclosure 9: Ameren Corporation - 10-Q Filed Period 03/31/2017 ULNRC-06400, Enclosure 3: 2017 Proxy Statement of Ameren Corporation2017-03-15015 March 2017 Enclosure 3: 2017 Proxy Statement of Ameren Corporation ULNRC-06400, Enclosure 14: Schedule 14C Information for Union Electric Company - March 20172017-03-15015 March 2017 Enclosure 14: Schedule 14C Information for Union Electric Company - March 2017 ML17362A0582017-03-15015 March 2017 Enclosure 3: 2017 Proxy Statement of Ameren Corporation ML17362A0722017-03-15015 March 2017 Enclosure 14: Schedule 14C Information for Union Electric Company - March 2017 ML17362A0652017-02-28028 February 2017 Enclosure 8: Ameren Corporation - 10-K Filed Period 02/28/2017 ULNRC-06400, Enclosure 8: Ameren Corporation - 10-K Filed Period 02/28/20172017-02-28028 February 2017 Enclosure 8: Ameren Corporation - 10-K Filed Period 02/28/2017 ML16348A3782016-12-13013 December 2016 Enclosure 4 - 2015 Annual Report (Include 2014 Form 10-K) ULNRC-06341, Callaway Plant Unit 1 - Enclosure 4 - 2015 Annual Report (Include 2014 Form 10-K)2016-12-13013 December 2016 Callaway Plant Unit 1 - Enclosure 4 - 2015 Annual Report (Include 2014 Form 10-K) ML15363A3192015-12-22022 December 2015 Enclosure 4, 2015 Ameren 2014 Annual Report (Filed 03/02/2015 Includes 2014 Form 10-K) ULNRC-06272, Callaway, Unit 1 - Enclosure 4, 2015 Ameren 2014 Annual Report (Filed 03/02/2015 Includes 2014 Form 10-K)2015-12-22022 December 2015 Callaway, Unit 1 - Enclosure 4, 2015 Ameren 2014 Annual Report (Filed 03/02/2015 Includes 2014 Form 10-K) ULNRC-06203, 10 CFR 50.46 Annual Report Regarding ECCS Evaluation Model Revisions2015-03-31031 March 2015 10 CFR 50.46 Annual Report Regarding ECCS Evaluation Model Revisions ULNRC-06110, Annual Radioactive Effluent Release Report2014-04-0202 April 2014 Annual Radioactive Effluent Release Report ML13002A1942012-12-27027 December 2012 Ameren Corp 2011 Annual Report ULNRC-05944, Ameren Corp 2011 Annual Report2012-12-27027 December 2012 Ameren Corp 2011 Annual Report ULNRC-05944, Ameren Corp United States Securities and Exchange Commission Schedule 14A2012-12-27027 December 2012 Ameren Corp United States Securities and Exchange Commission Schedule 14A ML13002A1932012-12-27027 December 2012 Ameren Corp United States Securities and Exchange Commission Schedule 14A ULNRC-05944, Ameren Corp 10-Q Quarterly Report Pursuant to Sections 13 or 15(d).02012-11-0909 November 2012 Ameren Corp 10-Q Quarterly Report Pursuant to Sections 13 or 15(d).0 ML13002A1862012-11-0909 November 2012 Ameren Corp 10-Q Quarterly Report Pursuant to Sections 13 or 15(d).0 ML13002A1852012-08-0808 August 2012 Ameren Corp 10-Q Quarterly Report Pursuant to Sections 13 or 15(d) ULNRC-05944, Ameren Corp 10-Q Quarterly Report Pursuant to Sections 13 or 15(d)2012-05-10010 May 2012 Ameren Corp 10-Q Quarterly Report Pursuant to Sections 13 or 15(d) ML13002A1842012-05-10010 May 2012 Ameren Corp 10-Q Quarterly Report Pursuant to Sections 13 or 15(d) ML13002A1832012-02-28028 February 2012 Ameren Corp 10-K Annual Report Pursuant to Section 13 and 15 (D) Filed on 2/28/2012 Filed Period 11/23/2011 ULNRC-05944, Ameren Corp 10-K Annual Report Pursuant to Section 13 and 15 (D) Filed on 2/28/2012 Filed Period 11/23/20112012-02-28028 February 2012 Ameren Corp 10-K Annual Report Pursuant to Section 13 and 15 (D) Filed on 2/28/2012 Filed Period 11/23/2011 ML13331A5712011-11-25025 November 2011 Enclosure to ULNRC-06038 - 10 CFR 50.59 Summary Report for November 25, 2011 to May 28, 2013 ML0816504352008-07-21021 July 2008 Allegation Program Annual Trends Report Cy 2007 ULNRC-05378, CFR 50.46 Annual Report, ECCS Evaluation Model Revisions2007-03-0707 March 2007 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions ULNRC-05268, Annual Financial Report2006-03-28028 March 2006 Annual Financial Report ULNRC-05141, Annual Environmental Operating Report2005-04-19019 April 2005 Annual Environmental Operating Report ULNRC-05136, Union Electric Company Annual Financial Report2005-03-21021 March 2005 Union Electric Company Annual Financial Report ML0414604542004-05-21021 May 2004 Annual Radioactive Effluent Release Report ML0414604242004-05-21021 May 2004 Annual Radioactive Effluent Release Report ULNRC-04991, 2003 Annual Radioactive Effluent Release Report2004-04-27027 April 2004 2003 Annual Radioactive Effluent Release Report ULNRC-04963, Annual Financial Report for 20022004-03-19019 March 2004 Annual Financial Report for 2002 ULNRC-04826, Union Electric Annual Financial Report2003-03-18018 March 2003 Union Electric Annual Financial Report ULNRC-04751, 10CFR50.46 Annual Report ECCS Evaluation Model Revisions2002-10-14014 October 2002 10CFR50.46 Annual Report ECCS Evaluation Model Revisions 2022-12-15
[Table view] Category:Letter type:ULNRC
MONTHYEARULNRC-06853, Submittal of 2023 Fitness for Duty Performance Data Per Per 10 CFR 26.7172024-01-29029 January 2024 Submittal of 2023 Fitness for Duty Performance Data Per Per 10 CFR 26.717 ULNRC-06847, Supplement to Relief Request from Requirements of ASME BPV Code, Section XI, Subsection Iwl Regarding Examination and Testing of the Unbonded Post-Tensioning System (Relief Request C3R-01)2023-12-21021 December 2023 Supplement to Relief Request from Requirements of ASME BPV Code, Section XI, Subsection Iwl Regarding Examination and Testing of the Unbonded Post-Tensioning System (Relief Request C3R-01) ULNRC-06849, License Renewal Resolution for Commitments 34 and 35 Perform Evaluation of Crack Initiation and Propagation in Steam Generator Divider Plate and Tube-To-Tubesheet Welds2023-12-20020 December 2023 License Renewal Resolution for Commitments 34 and 35 Perform Evaluation of Crack Initiation and Propagation in Steam Generator Divider Plate and Tube-To-Tubesheet Welds ULNRC-06844, Request for Exemption from Specific Requirements in 2023 Security Rule, Enhanced Weapons, Firearms Background Checks, and Security Event Notification2023-12-0707 December 2023 Request for Exemption from Specific Requirements in 2023 Security Rule, Enhanced Weapons, Firearms Background Checks, and Security Event Notification ULNRC-06827, Supplement to License Amendment Request Regarding Support System Requirements for Residual Heat Removal and Control Room Air Conditioning Systems Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029)2023-11-20020 November 2023 Supplement to License Amendment Request Regarding Support System Requirements for Residual Heat Removal and Control Room Air Conditioning Systems Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029) ULNRC-06824, Response to Request for Additional Information Regarding Operating Quality Assurance Manual (Oqam) Revision 36A2023-08-17017 August 2023 Response to Request for Additional Information Regarding Operating Quality Assurance Manual (Oqam) Revision 36A ULNRC-06830, Transmittal of Updated Technical Specification Markup and Clean Pages for License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak2023-08-15015 August 2023 Transmittal of Updated Technical Specification Markup and Clean Pages for License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak ULNRC-06223, Minor Correction to License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Test Frequencies (LDCN 2020-0004)2023-07-25025 July 2023 Minor Correction to License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Test Frequencies (LDCN 2020-0004) ULNRC-06799, Submittal of Licensee Event Report 2022-003-01, Class 1E Electrical Air Conditioning System Thermal Expansion Valve Failure Resulted in Condition Prohibited by Technical Specifications2023-07-13013 July 2023 Submittal of Licensee Event Report 2022-003-01, Class 1E Electrical Air Conditioning System Thermal Expansion Valve Failure Resulted in Condition Prohibited by Technical Specifications ULNRC-06821, Post-Audit Follow-Up Information in Support of Callaway'S License Amendment Request and Proposed Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (EPID L-2022-LLA-0150 and EPID L-2022-LLE-00301)2023-06-21021 June 2023 Post-Audit Follow-Up Information in Support of Callaway'S License Amendment Request and Proposed Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (EPID L-2022-LLA-0150 and EPID L-2022-LLE-00301) ULNRC-06822, Additional Information Regarding Request for NRC Approval of Operating Quality Assurance Manual (Oqam) Revision 36a2023-06-14014 June 2023 Additional Information Regarding Request for NRC Approval of Operating Quality Assurance Manual (Oqam) Revision 36a ULNRC-06815, Request for NRC Approval of Operating Quality Assurance Manual, Revision 36a2023-06-0505 June 2023 Request for NRC Approval of Operating Quality Assurance Manual, Revision 36a ULNRC-06818, Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate .2023-06-0505 June 2023 Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate . ULNRC-06816, Withdrawal of Previously Submitted Enclosures Regarding License Amendment Request for Adoption of Alternative Source Term and Revision of Technical Specifications (LDCN 21-0015)2023-05-0909 May 2023 Withdrawal of Previously Submitted Enclosures Regarding License Amendment Request for Adoption of Alternative Source Term and Revision of Technical Specifications (LDCN 21-0015) ULNRC-06812, Submittal of 2022 Annual Radiological Environmental Operating Report2023-04-27027 April 2023 Submittal of 2022 Annual Radiological Environmental Operating Report ULNRC-06806, Submittal of Radiological Emergency Response Plan, Revision 552023-04-12012 April 2023 Submittal of Radiological Emergency Response Plan, Revision 55 ULNRC-06807, Submittal of Single Positive Test Forms2023-04-0303 April 2023 Submittal of Single Positive Test Forms ULNRC-06798, Submittal of Status of Plant Decommissioning Funding and ISFSI Decommissioning Funding Plan2023-03-30030 March 2023 Submittal of Status of Plant Decommissioning Funding and ISFSI Decommissioning Funding Plan ULNRC-06801, CFR 50.46 Annual Report Regarding ECCS Evaluation Model Revisions2023-03-30030 March 2023 CFR 50.46 Annual Report Regarding ECCS Evaluation Model Revisions ULNRC-06804, Submittal of Nuclear Property Insurance Reporting2023-03-29029 March 2023 Submittal of Nuclear Property Insurance Reporting ULNRC-06751, Application to Revise Technical Specifications to Adopt TSTF-501-A, Rev. 1, Relocate Stored Oil & Lube Oil Volume Values to Licensee Control2023-03-29029 March 2023 Application to Revise Technical Specifications to Adopt TSTF-501-A, Rev. 1, Relocate Stored Oil & Lube Oil Volume Values to Licensee Control ULNRC-06803, Submittal of Response to Request for Additional Information Regarding Results of Steam Generator Tube In-Service Inspection2023-03-29029 March 2023 Submittal of Response to Request for Additional Information Regarding Results of Steam Generator Tube In-Service Inspection ULNRC-06805, Transmittal of Special Report 2023-02 Non-Functionality of Containment Hydrogen Analyzer Channel for Greater than 30 Days2023-03-21021 March 2023 Transmittal of Special Report 2023-02 Non-Functionality of Containment Hydrogen Analyzer Channel for Greater than 30 Days ULNRC-06802, Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument2023-03-0909 March 2023 Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument ULNRC-06795, Submittal of Fitness for Duty Reports for 2022, Including Single Positive Test Forms2023-01-24024 January 2023 Submittal of Fitness for Duty Reports for 2022, Including Single Positive Test Forms ULNRC-06794, Submittal of Fitness for Duty Program Data for 20222023-01-24024 January 2023 Submittal of Fitness for Duty Program Data for 2022 ULNRC-06787, Response to Request for Additional Information Regarding License Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015)2022-12-0808 December 2022 Response to Request for Additional Information Regarding License Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015) ULNRC-06781, License Amendment Request to Clarify Support System Requirements for the Residual Heat Removal System and Control Room Air Conditioning System Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029)2022-12-0101 December 2022 License Amendment Request to Clarify Support System Requirements for the Residual Heat Removal System and Control Room Air Conditioning System Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029) ULNRC-06780, Additional Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505, LDCN 20-0072022-11-30030 November 2022 Additional Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505, LDCN 20-007 ULNRC-06772, 10 CFR 50.59 and 10 CFR 72.48 Summary Report2022-11-23023 November 2022 10 CFR 50.59 and 10 CFR 72.48 Summary Report ULNRC-06777, Operating Quality Assurance Manual (Oqam) Revision 362022-11-16016 November 2022 Operating Quality Assurance Manual (Oqam) Revision 36 ULNRC-06779, ULNRC-06779: Contesting of Green NCV 05000483/2022010-03, Failure to Perform Required Inservice Testing of Residual Heat Removal Heat Exchanger Pneumatically (Air) Operated Outlet and Bypass Valves2022-11-14014 November 2022 ULNRC-06779: Contesting of Green NCV 05000483/2022010-03, Failure to Perform Required Inservice Testing of Residual Heat Removal Heat Exchanger Pneumatically (Air) Operated Outlet and Bypass Valves ULNRC-06765, License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Testing Frequencies (LDCN 2020-0004)2022-11-0303 November 2022 License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Testing Frequencies (LDCN 2020-0004) ULNRC-06773, Results of Steam Generator Tube In-Service Inspection2022-11-0101 November 2022 Results of Steam Generator Tube In-Service Inspection ULNRC-06775, Submittal of Non-Functionality of Loose-Part Detection System Channel for Greater than 30 Days2022-10-27027 October 2022 Submittal of Non-Functionality of Loose-Part Detection System Channel for Greater than 30 Days ULNRC-06771, Correction to Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspections (LDCN 21-0013)2022-10-25025 October 2022 Correction to Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspections (LDCN 21-0013) ULNRC-06770, Cycle 25 Commitment Change Summary Report2022-10-19019 October 2022 Cycle 25 Commitment Change Summary Report ULNRC-06766, Correction of Text Contained in Enclosures Provided with Supplements to Request for License Amendment and Regulatory Exemptions for a Risk-Informed Approach to Address GSI-191 and Respond to GL 2004-02 (LDCN 19-0014)2022-09-0808 September 2022 Correction of Text Contained in Enclosures Provided with Supplements to Request for License Amendment and Regulatory Exemptions for a Risk-Informed Approach to Address GSI-191 and Respond to GL 2004-02 (LDCN 19-0014) ULNRC-06767, Presentation Information for Pre-Application Meeting Regarding New License Amendment Request for Use of Framatome Fuel Assemblies2022-09-0606 September 2022 Presentation Information for Pre-Application Meeting Regarding New License Amendment Request for Use of Framatome Fuel Assemblies ULNRC-06764, Revised Response to Request for Additional Information Regarding License Amendment Request for Adoption Off Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015)2022-09-0101 September 2022 Revised Response to Request for Additional Information Regarding License Amendment Request for Adoption Off Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015) ULNRC-06763, Supplement to Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspection (LDCN 21-0013)2022-09-0101 September 2022 Supplement to Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspection (LDCN 21-0013) ULNRC-06762, Submittal of Owner'S Activity Reports (OAR-1 Forms) for Cycle/Refuel 252022-08-25025 August 2022 Submittal of Owner'S Activity Reports (OAR-1 Forms) for Cycle/Refuel 25 ULNRC-06758, Union Electric Co. - Renewed Facility Operating License NPF-30, Withdrawal of License Amendment Request and Exemption Request Regarding Transition to Framatome Fuel (LDCN 22-0002)2022-08-0404 August 2022 Union Electric Co. - Renewed Facility Operating License NPF-30, Withdrawal of License Amendment Request and Exemption Request Regarding Transition to Framatome Fuel (LDCN 22-0002) ULNRC-06755, Response to Requests for Additional Information for Proposed Revision to Radiological Emergency Response Plan Regarding Response and Notification Goals2022-07-13013 July 2022 Response to Requests for Additional Information for Proposed Revision to Radiological Emergency Response Plan Regarding Response and Notification Goals ULNRC-06754, Response to Request for Additional Information Regarding Licensee Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications2022-07-0505 July 2022 Response to Request for Additional Information Regarding Licensee Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications ULNRC-06739, Post-Audit Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505 (LDCN 20-0007)2022-06-30030 June 2022 Post-Audit Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505 (LDCN 20-0007) ULNRC-06752, Evacuation Time Estimates Report2022-06-27027 June 2022 Evacuation Time Estimates Report ULNRC-06753, Presentation Information for Pre-Submittal Meeting Regarding Updated Spent Fuel Criticality Safety Analysis2022-06-23023 June 2022 Presentation Information for Pre-Submittal Meeting Regarding Updated Spent Fuel Criticality Safety Analysis ULNRC-06750, Submittal of Cycle 26 Core Operating Limits Report (COLR)2022-06-13013 June 2022 Submittal of Cycle 26 Core Operating Limits Report (COLR) ULNRC-06735, Response to Request for Additional Information Regarding Request for License Amendment and Regulatory Exemptions for Risk-Informed Approach to Address GSI-191 and Respond to Generic Letter 2004-02 (LDCN 19-0014).2022-05-27027 May 2022 Response to Request for Additional Information Regarding Request for License Amendment and Regulatory Exemptions for Risk-Informed Approach to Address GSI-191 and Respond to Generic Letter 2004-02 (LDCN 19-0014). 2024-01-29
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WAmeren MISSOURI Callaway Plant March 31,2015 ULNRC-06203 U.S. Nuclear Regulatory Commission Attn: Docwnent Control Desk Washington, DC 20555-0001 10 CFR 50.46 Ladies and Gentlemen:
DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.
FACILITY OPERATING LICENSE NPF-30 10 CFR 50.46 ANNUAL REPORT ECCS EVALUATION MODEL REVISIONS
References:
- 1) ULNRC-05260 dated 3-9-06
- 2) ULNRC-05378 dated 3-7-07
- 3) ULNRC-05475 dated 3-4-08
- 4) ULNRC-05600 dated 3-4-09
- 5) ULNRC-05683 dated 3-1-10
- 6) ULNRC-05769 dated 3-1-11
- 7) ULNRC-05840 dated 3-1-12
- 8) ULNRC-05968 dated 3-6-13
- 9) ULNRC-06098 dated 3-25-14 Ameren Missouri hereby submits the annual report required per 10 CFR 50.46(a)(3) for Callaway Plant. Attachment 1 to this letter describes changes to the Westinghouse ECCS Large Break and Small Break Loss of Coolant Accident (LOCA) Evaluation Models which have been implemented for Callaway during the time period from March 2014 to March 2015. Attachment 2 provides an ECCS Evaluation Model Margin Assessment which accounts for all peak cladding temperature (PCT) changes resulting from the resolution of prior issues as they apply to Callaway. No new PCT penalties are included in these attachments.
References 1 through 9 provided annual10 CFR 50.46 reports that were issued after the LOCA analysis were revised to reflect the installation of the replacement steam generators in 2005. The PCT values determined in the Large Break and Small Break LOCA analysis of record, when combined with all PCT margin allocations, remain below the 2200°F regulatory limit. However, in March 2014, Ameren Missouri was informed by Westinghouse that the absolute magnitude of the Large Break Loss
............................................................................................................................ PO Box 620 Fulton, MO 65251 AmerenMissouri.com .............. .
STARS
ULNRC-06203 March 31,2015 Page2 of Coolant Accident (LBLOCA) penalty assessments that have accumulated since the current analysis of record (replacement steam generator analysis approved in Callaway License Amendment 168) exceeded 50°F. As such, Reference 9 was submitted within the requirements of 10 CFR 50.46(a)(3)(ii), and contains a commitment to reanalyze the Large Break and Small Break Loss of Coolant Accidents using the NRC-approved version ofWCAP-16996-P, "Realistic LOCA Evaluation Methodology Applied to the Full Spectrum of Break Sizes (FULL SPECTRUM LOCA Methodology)," which is still under NRC review. This reanalysis will be completed on a schedule to be determined as part of the 10 CFR 50.46c rulemaking process.
If you have any questions on this report, please contact Mr. Tom Elwood at (314) 225-1905.
Sincerely, Luke Graessle Sr. Director, Operations Support EMP Attachments:
- 1. Changes to the Westinghouse ECCS Evaluation Model and PCT Penalty Assessments
- 2. ECCS Evaluation Model Margin Assessment for Callaway
ULNRC-06203 March 31,2015 Page 3 cc: Mr. Marc L. Dapas Regional Administrator U.S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. Fred Lyon Project Manager, Callaway Plant Office ofNuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 0-8B 1 Washington, DC 20555-2738
ULNRC-06203 March 31,2015 Page4 Index and send hardcopy to QA File A160.0761 Hardcopy:
Certrec Corporation 4150 International Plaza Suite 820 Fort Worth, TX 76109 (Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)
Electronic distribution for the following can be made via Responses and Reports ULNRC Distribution:
F. M. Diya D. W. Neterer L. H. Graessle T. E. Hernnann B. L. Cox S. A. Maglio T. B. Elwood Corporate Communications NSRB Secretary G. G. Yates J. B. Little J. Cordz Mr. Greg Voss, REP Manager (SEMA)
STARS Regulatory Affairs Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)
Ms. Leanne Tippett-Mosby (DNR)
ULNRC-06203 ATTACHMENT ONE CHANGES TO THE WESTINGHOUSE ECCS EVALUATION MODEL AND PCT PENALTY ASSESSMENTS 1
ULNRC-06203 TABLE OF CONTENTS
- 1. FUEL ROD GAP CONDUCTANCE ERROR
- 2. RADIATION HEAT TRANSFER MODEL ERROR
- 3. SBLOCTA PRE-DNB CLADDING SURFACE HEAT TRANSFER COEFFICIENT CALCULATION
- 4. GENERAL CODE MAINTENANCE 2
ULNRC-06203
- 1. FUEL ROD GAP CONDUCTANCE ERROR An error was identified in the fuel rod gap conductance model in the NOTRUMP computer code (reactor coolant system response model). The error is associated with the use of an incorrect temperature in the calculation of the cladding emissivity term. This error corresponds to a Non-Discretionary Change as described in Section 4.1.2 of WCAP-13451.
Based on a combination of engineering judgment of the phenomena and physics of a small break LOCA, and sensitivity calculations performed with the advanced plant version of NOTRUMP, Westinghouse has concluded that this error has a negligible effect, leading to an estimated Peak Cladding Temperature (PCT) impact of 0°F on small break LOCA analysis results.
- 2. RADIATION HEAT TRANSFER MODEL ERROR Two errors were discovered in the calculation of the radiation heat transfer coefficient within the fuel rod model of the NOTRUMP computer code (reactor coolant system response model). First, existing logic did not preclude non-physical negative or large (negative or positive) radiation heat transfer coefficients from being calculated. These erroneous calculations occurred when the vapor temperature exceeded the cladding surface temperature or when the predicted temperature difference was less than 1°F. Second, a temperature term incorrectly used degrees Fahrenheit instead of Rankine. These errors represent a closely related group of Non-Discretionary problems in accordance with Section 4.1.2 of WCAP-13451.
Based on a combination of engineering judgment of the phenomena and physics of a small break LOCA, and sensitivity calculations performed with the advanced plant version of NOTRUMP, Westinghouse has concluded that this error has a negligible effect, leading to an estimated Peak Cladding Temperature (PCT) impact of 0°F on small break LOCA analysis results.
- 3. SBLOCTA PRE-DNB CLADDING SURFACE HEAT TRANSFER COEFFICIENT CALCULATION Two errors were discovered in the pre-departure from nucleate boiling (pre-DNB) cladding surface heat transfer coefficient calculation in the SBLOCTA code (cladding heat-up calculations). The first error is a result of inconsistent time units (hours vs. seconds) in the parameters used for the calculation of the Reynolds and Prandtl numbers, and the second error relates to an incorrect diameter used to develop the area term in the cladding surface heat flux calculation. Both of these issues impact the calculation of the pre-DNB convective heat transfer coefficient, representing a closely related group of Non-Discretionary Changes to the Evaluation Model as described in Section 4.1.2 of WCAP-13451.
These errors have been corrected in the SBLOCTA code. Because this condition occurred prior to DNB, it was judged that these errors had no direct impact on the cladding heat-up related to the core uncover period. A series of validation tests were performed by Westinghouse and confirmed that these errors have a negligible effect on SBLOCA analysis results, leading to an estimated Peak Cladding Temperature (PCT) impact of 0°F.
3
ULNRC-06203
- 4. GENERAL CODE MAINTENANCE Various changes have been made to enhance the usability of the codes and to help preclude errors in analyses. This includes items such as modifying input variable definitions, units, and defaults; improving the input diagnostic checks; enhancing the code output; optimizing active coding; and eliminating inactive coding. These changes have been evaluated for impact on existing Small Break LOCA analysis results and they represent Discretionary Changes that will be implemented on a forward-fit basis in accordance with Section 4.1.1 of WCAP-1345.
Westinghouse has judged this issue to have an estimated PCT impact of 0°F on existing Small Break LOCA analysis results.
4
ULNRC-06203 ATTACHMENT TWO ECCS EVALUATION MODEL MARGIN ASSESSMENT FOR CALLAWAY 1
ULNRC-06203 LARGE BREAK LOCA A. ANALYSIS OF RECORD (AOR) PCT = 1939°F B. PRIOR ECCS MODEL ASSESSMENTS + 58°F C. CURRENT LOCA MODEL ASSESSMENTS - + 0°F March 2015 LICENSING BASIS PCT + MARGIN ALLOCATIONS 1997°F ABSOLUTE MAGNITUDE OF MARGIN ALLOCATIONS 58°F SINCE LAST ANALYSIS OF RECORD OR LBLOCA 30-DAY REPORT 2
ULNRC-06203 SMALL BREAK LOCA A. ANALYSIS OF RECORD (AOR) PCT = 1043°F B. PRIOR ECCS MODEL ASSESSMENTS + 0°F C. CURRENT ECCS MODEL ASSESSMENTS - + 0ºF March 2015 LICENSING BASIS PCT + MARGIN ALLOCATIONS 1043°F ABSOLUTE MAGNITUDE OF MARGIN ALLOCATIONS 0°F SINCE LAST ANALYSIS OF RECORD OR SBLOCA 30-DAY REPORT 3