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Category:Annual Operating Report
MONTHYEARML23117A2942023-04-27027 April 2023 Annual Radiological Environmental Operating Report 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-06732, Annual Radiological Environmental Operating Report, January 1 to December 31, 20212022-04-22022 April 2022 Annual Radiological Environmental Operating Report, January 1 to December 31, 2021 ML22081A3202022-03-22022 March 2022 Changes to the Westinghouse ECCS Evaluation Model and PCT Penalty Assessments ULNRC-06653, Annual Radiological Environmental Operating Report2021-04-28028 April 2021 Annual Radiological Environmental Operating Report ULNRC-06652, Annual Radioactive Effluent Release Report2021-04-28028 April 2021 Annual Radioactive Effluent Release Report ULNRC-06497, 10 CFR 50.46 Annual Report ECCS Evaluation Model Revisions2019-03-28028 March 2019 10 CFR 50.46 Annual Report ECCS Evaluation Model Revisions ULNRC-04631, Annual Radiological Environmental Operating Report2018-05-0101 May 2018 Annual Radiological Environmental Operating Report ML18121A1672018-05-0101 May 2018 Annual Radioactive Effluent Release Report ULNRC-06428, 10 CFR 50.46 Annual Report ECCS Evaluation Model Revisions2018-03-29029 March 2018 10 CFR 50.46 Annual Report ECCS Evaluation Model Revisions ULNRC-06361, Submittal of 10 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions2017-03-30030 March 2017 Submittal of 10 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions ULNRC-06202, Transmittal of 10 CFR 50.59 and 10 CFR 72.48 Summary Report2015-05-22022 May 2015 Transmittal of 10 CFR 50.59 and 10 CFR 72.48 Summary Report ULNRC-06196, Cycle 20 Commitment Change Summary Report, Guideline for Managing NRC Commitment Changes, for Changes Requiring NRC Notification Annually or at a Frequency Consistent with That Required for FSAR Updates Per 10CFR 50.71.2015-03-18018 March 2015 Cycle 20 Commitment Change Summary Report, Guideline for Managing NRC Commitment Changes, for Changes Requiring NRC Notification Annually or at a Frequency Consistent with That Required for FSAR Updates Per 10CFR 50.71. ML13119A1422013-04-27027 April 2013 Annual Radiological Environmental Operating Report, January 1 to December 31, 2012. Enclosure to ULNRC-05987 ULNRC-05875, 2010 Annual Radiological Environmental Operating Report2012-06-20020 June 2012 2010 Annual Radiological Environmental Operating Report ULNRC-05865, CFR 50.59 Summary Report for June 30, 2010 to November 25, 20112012-05-24024 May 2012 CFR 50.59 Summary Report for June 30, 2010 to November 25, 2011 ULNRC-05853, 2011 Annual Radiological Environmental Operating Report2012-04-27027 April 2012 2011 Annual Radiological Environmental Operating Report ULNRC-05840, CFR 50.46 Annual Report ECCS Evaluation Model Revisions2012-03-0101 March 2012 CFR 50.46 Annual Report ECCS Evaluation Model Revisions ULNRC-05784, Submittal of 2010 Radiological Effluent Release Report2011-04-29029 April 2011 Submittal of 2010 Radiological Effluent Release Report ULNRC-05785, Enclosure 44 to ULNRC-05893 - Ameren Missouri. 2011. 2010 Annual Radiological Environmental Operating Report for the Callaway Plant. USNRC-05785. April 29, 20112011-04-29029 April 2011 Enclosure 44 to ULNRC-05893 - Ameren Missouri. 2011. 2010 Annual Radiological Environmental Operating Report for the Callaway Plant. USNRC-05785. April 29, 2011 ULNRC-05769, 10 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions2011-03-0101 March 2011 10 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions ULNRC-05769, Callaway Plant - 10 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions2011-03-0101 March 2011 Callaway Plant - 10 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions ML1106012712011-03-0101 March 2011 Callaway Plant - 10 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions ULNRC-05702, Annual Radiological Environmental Operating Report2010-04-30030 April 2010 Annual Radiological Environmental Operating Report ULNRC-05699, Annual Radioactive Effluent Release Report2010-04-27027 April 2010 Annual Radioactive Effluent Release Report ULNRC-05640, Annual Radiological Environmental Operating Report2009-07-22022 July 2009 Annual Radiological Environmental Operating Report ULNRC-05622, 2008 Annual Radiological Environmental Operating Report2009-04-30030 April 2009 2008 Annual Radiological Environmental Operating Report ULNRC-05475, CFR 50.46 Annual Report, ECCS Evaluation Model Revisions2008-03-0404 March 2008 CFR 50.46 Annual Report, ECCS Evaluation Model Revisions ULNRC-05400, 2006 Annual Radiological Environmental Operating Report2007-04-23023 April 2007 2006 Annual Radiological Environmental Operating Report ULNRC-05316, Annual Radiological Environmental Operating Report2006-07-25025 July 2006 Annual Radiological Environmental Operating Report 2023-04-27
[Table view] Category:Letter type:ULNRC
MONTHYEARULNRC-06891, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00052024-06-26026 June 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0005 ULNRC-06892, Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Canister HGMPC00062024-06-26026 June 2024 Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Canister HGMPC0006 ULNRC-06884, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00022024-06-12012 June 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0002 ULNRC-06885, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00032024-06-12012 June 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0003 ULNRC-06886, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00042024-06-12012 June 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0004 ULNRC-06882, Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Canister HGMPC00122024-05-16016 May 2024 Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Canister HGMPC0012 ULNRC-06877, Final Safety Analysis Report Revision OL-27 and Technical Specification Bases Revision 252024-05-0606 May 2024 Final Safety Analysis Report Revision OL-27 and Technical Specification Bases Revision 25 ULNRC-06856, CFR 50.59 and 10 CFR 72.48 Summary Report2024-05-0101 May 2024 CFR 50.59 and 10 CFR 72.48 Summary Report ULNRC-06869, Submittal of Callaway, Unit 1, 2023 Annual Radiological Environmental Operating Report2024-04-30030 April 2024 Submittal of Callaway, Unit 1, 2023 Annual Radiological Environmental Operating Report ULNRC-06876, Registration of Dry Spent Fuel Storage Canister HGMPC00102024-04-25025 April 2024 Registration of Dry Spent Fuel Storage Canister HGMPC0010 ULNRC-06866, Submittal of Cycle 26 Commitment Change Summary Report2024-04-17017 April 2024 Submittal of Cycle 26 Commitment Change Summary Report ULNRC-06871, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00072024-04-17017 April 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0007 ULNRC-06872, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00082024-04-17017 April 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0008 ULNRC-06863, Submittal of Annual Exposure Report for 20232024-03-20020 March 2024 Submittal of Annual Exposure Report for 2023 ULNRC-06852, Owners Activity Reports (OAR-1 Forms) for Cycle/Refuel 262024-03-0505 March 2024 Owners Activity Reports (OAR-1 Forms) for Cycle/Refuel 26 ULNRC-06858, Completion of License Renewal Activities Prior to Entering the Period of Extended Operation2024-02-21021 February 2024 Completion of License Renewal Activities Prior to Entering the Period of Extended Operation ULNRC-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-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-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-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-06794, Submittal of Fitness for Duty Program Data for 20222023-01-24024 January 2023 Submittal of Fitness for Duty Program Data for 2022 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-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 2024-06-26
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'WAmeren Callaway Plant MISSOURI May 22,2015 ULNRC-06202 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 10 CFR 50.59(d)(2) 10 CFR 72.48(d)(2)
Ladies and Gentlemen:
DOCKET NUMBERS 50-483 AND 72-1045 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.
RENEWED FACILITY OPERATING LICENSE NPF-30 10 CFR 50.59 AND 10 CFR 72.48
SUMMARY
REPORT In accordance with 10 CFR 50.59(d)(2), this letter transmits a report that summarizes the evaluations performed pursuant to 10 CFR 50.59(c)(1) for changes, test, and experiments approved and implemented for activities at Callaway Plant. This report covers all 10 CFR 50.59 evaluations that were implemented from May 28,2013 to November 22, 2014.
Union Electric Company (dba Ameren Missouri) did not perform any evaluations at Callaway Plant required by 10 CFR 72.48 between May 28, 2013 and November 22, 2014. Therefore, no summaries of evaluations are provided in this report per 10 CFR 72.48(d)(2) for Callaway Plant.
This letter does not contain new commitments.
Ifthere are any questions, please contact Mr. Tom Elwood at (314) 225-1905.
Sincerely, L\e,ot\
Scott Maglio 0
Manager, Regulatory Affairs Enclosure
.......................................................................................................................... PO Box 620 Fulton, MO 65251 AmerenMissouri.com ...............
STARS
ULNRC-06202 May 22,2015 Page2 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. L. John Klos Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 0-8B 1 Washington, DC 20555-2738
ULNRC-06202 May 22,2015 Page 3 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. Herrmann B.L.Cox S. A. Maglio T. B. Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)
Enclosure to ULNRC-06202 UNION ELECTRIC COMPANY (dba AMEREN MISSOURI)
CALLAWAY PLANT DOCKET NO. 50-483 AND 72-1045 10 CFR 50.59 and 10 CFR 72.48
SUMMARY
REPORT Report Period: May 28, 2013 to November 22, 2014.
Enclosure to ULNRC-06202 EXECUTIVE
SUMMARY
In accordance with 10 CFR 50.59(d)(2), a summary report has been prepared which provides summaries of the 10 CFR 50.59 evaluations of changes, tests, and experiments approved and implemented for activities at Callaway Plant.
This report covers all10 CFR 50.59 evaluations for changes that were implemented from May 28,2013 to November 22,2014. During this period there were five changes implemented that required a 10 CFR 50.59 evaluation. For two of the changes, it was determined that prior NRC approval was required. Those changes were approved via Amendments 207 and 211 to the Callaway Operating License, and therefore, summaries of those changes do not need to be provided in this report. For the remaining three changes, it was determined per 10 CFR 50.59(c)(1) that NRC approval was not required, and therefore, summaries of those three 10 CFR 50.59 evaluations are hereby provided.
Page 1 of 5
Enclosure to ULNRC-06202 10 CFR 50.59 EVALUATIONS:
Evaluation Number: Activity:
13-03 MP 10-0001, Implement an Integrated Head Assembly (IHA) in RF20 in Support of the Replacement Reactor Vessel Head Closure Head (RRVCH) Project 13-05 LDCN 13-0013, Pressurizer Pressure 13-06 LDCN 13-0017, Containment Cooler Post-accident Heat Removal Rate 10 CFR 72.48 EVALUATIONS:
I Evaluation Number: I Activity:
None LDCN- Licensing Document Change Notice MP -Modification Package Page 2 of 5
Enclosure to ULNRC-06202 10 CFR 50.59 Evaluation 13-03: Modification Package (MP) 10-0001- Implement an Integrated Head Assembly (IHA) in RF20 in Support of the Replacement Reactor Vessel Head Closure Head (RRVCH) Project Activity
Description:
This activity involves replacing the existing Service Structure (SS) currently installed above the original reactor vessel closure head (ORVCR) with an integrated head assembly (IRA) that will be installed above the replacement reactor vessel closure head (RRVCH). A 10 CFR 50.59 Evaluation was performed to evaluate potential departures from an FSAR-described evaluation methodology associated with the use of computer codes for stress analysis and reactor vessel Head Drop Analysis that are not described in the FSAR. The following three methodology changes were evaluated:
- 1. The piping and supports structural analysis for the replacement Reactor Vessel Head Vent System (RVHVS) and replacement Reactor Vessel Level Indication System (RVLIS) involve the use of the computer code BWSPAN (in lieu ofWESDYN and PA CAEPIPE). BWSPAN is currently not included in FSAR Table 3.9(B)-1 (Computer Programs Used in Analysis).
- 2. The Westinghouse EMDAC code is being used for the reactor vessel structural analysis (in lieu ofWECAN code). EMDAC is currently not included in FSAR Table 3.9(B)-1 (Computer Programs Used in Analysis).
- 3. The reactor vessel head drop analysis (which is described in FSAR-SP 9.1.4.3) is being re-performed using a modem finite element analysis that includes the Integrated Head Assembly (in lieu of the classic model ofWCAP-9198). RIS 2008-28 (NEI 08-
- 05) describes the methodology to evaluate a drop of the reactor head. Per the RIS, "Licensees may use these guidelines to voluntarily establish a revised licensing basis for handling of reactor vessel heads and other heavy loads that is consistent with the provisions ofTitle 10 ofthe Code ofFederal Regulations (10 CFR) Section 50.59, "Changes, Tests and Experiments."
Summary of Evaluation:
The 10 CFR 50.59 Evaluation concluded that for items 1 and 2 the new methodologies proposed to be used are essentially the same as the methodologies currently described in the FSAR, and do not constitute a departure from an FSAR-described methodology. For item 3 the methodology described in NEI 08-05 is allowed without prior NRC approval. Therefore, the proposed methodology changes (described above) may be implemented without prior approval by the NRC.
Page 3 of 5
Enclosure to ULNRC-06202 10 CFR 50.59 Evaluation 13-05: Pressurizer Pressure Activity
Description:
This activity involves reducing the pressurizer pressure value associated with Technical Specification (TS) 3.4.1, "RCS Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB) Limits," from -30 psi to -60 psi. LCO 3.4.1(a) requires that "Pressurizer Pressure is greater than or equal to the limit specified in the COLR." The COLR is contained in Callaway Curve Book Figure 13-1, and the current value for COLR item 2.11 (per Revision
- 56) is~ 2,224 psig. With the additional-30 psi bias being added to the current -30 psi uncertainty value, the allowable minimum indicated pressure used by the control room operators to verify compliance with TS 3.4.1 will be 2,195 psig.
This reduction in the low pressure uncertainty value (from the current value of -30 psi to a new value of -60 psi) is to prevent temporary entries into Condition A of Technical Specification 3.4.1 during routine changes in plant power.
Summary of Evaluation:
Callaway Plant received revisions of FSAR Chapter 15 analysis from Westinghouse. This provided verification that adding an additional-30 psi bias to the existing -30 psi low pressure uncertainty value still keeps Callaway Plant within the analysis acceptance criteria needed to maintain safe operation of the plant in all of the associated Chapter 15 accidents potentially affected by this reduction of pressure.
It is therefore concluded that the addition of a -30 psi bias to the existing+/- 30 psi uncertainty band for the Pressurizer Pressure value associated with Technical Specification (TS) 3.4.1 does not require prior NRC approval.
Page 4 of 5
Enclosure to ULNRC-06202 10 CFR 50.59 Evaluation 13-06: Containment Cooler Post-accident Heat Removal Rate Activity
Description:
The activity involves a reduction in the required level of Containment Cooler performance credited in Callaway's current licensing bases from 141.4 E6 BTU/Hr to 100 E6 BTU/Hr under accident conditions. The proposed change is necessary due to the need to make allowances for substantial uncertainties associated with testing the containment coolers under normal operating conditions and then extrapolating the test results to determine cooler performance under accident conditions.
Summary of Evaluation:
Ameren performed calculations to analyze the effect of reduced containment cooler performance on post-accident containment environments. These calculations demonstrate that the proposed changes do not affect previously calculated values for peak post-accident pressure or temperature.
There is a slight increase in the post-peak pressure and temperature compared to previously calculated values. The reduction in credited cooler performance slows the removal of energy from the post-accident containment vapor space, which results in the higher tail-end pressures and temperatures. An Environmental Qualification review of the revised containment pressure and temperature values, however, determined that the proposed change does not present an unacceptable adverse impact on the capability of safety-related equipment located inside containment to perform its specified safety functions and meet mission time requirements.
Therefore, the proposed change to Callaway's current licensing basis may be implemented without prior approval by the NRC.
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