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Category:Letter
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 IR 05000483/20230042024-01-19019 January 2024 Integrated Inspection Report 05000483/2023004 ML24008A0552024-01-19019 January 2024 Acceptance of Requested Licensing Action - Proposed Alternative to the Requirements of the ASME Code (EPID L-2023-LLR- 0061) ML23353A1712024-01-18018 January 2024 Issuance of Amendment No. 237 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 ML23317A0012024-01-12012 January 2024 Audit Summary Regarding LAR to Clarify Support System Requirements for the Residual Heat Removal and Control Room Air Conditioning System Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 ML23347A1212024-01-11011 January 2024 Issuance of Amendment No. 236 to Adopt TSTF-501, Revision 1, Relocate Stored Fuel Oil and Lube Volume Values to Licensee Control EPID L-2023-LLA-0046) ML24011A1492024-01-11011 January 2024 Notification of Post-Approval Site Inspection for License Renewal and Request for Information (05000483/2024011) 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 ML23346A0392023-12-14014 December 2023 Supplemental Information Needed for Acceptance of Requested Licensing Action Request for Relief from Requirements of ASME Code, Section Xl, Examination and Testing Unbonded Post-Tensioning System 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 05000483/LER-2023-001, Submittal of LER 2023-001-00 for Callaway, Unit 1, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications2023-11-29029 November 2023 Submittal of LER 2023-001-00 for Callaway, Unit 1, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications 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) IR 05000483/20230102023-11-15015 November 2023 NRC License Renewal Phase 1 Inspection Report 05000483 2023010 IR 05000483/20233012023-11-0909 November 2023 NRC Examination Report 05000483-2023301 ML23311A2082023-11-0909 November 2023 Reassignment of U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch IV ML23297A2502023-11-0606 November 2023 Individual Notice of Consideration of Issuance of Amendment to Renewed Facility Operating License, Proposed No Significant Hazards Consideration Determination and Opportunity for a Hearing (EPID L-2022-LLA-0176) - Letter IR 05000483/20240122023-10-24024 October 2023 Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection (05000483/2024012) ML23293A2652023-10-24024 October 2023 3rd Quarter 2023 Integrated Inspection Report ML23240A3692023-10-0505 October 2023 Issuance of Amendment No. 235 to Revise Technical Specifications to Use of Framatome Gaia Fuel (EPID L-2022-LLA-0150) (Non-Proprietary) ML23234A1522023-10-0505 October 2023 Exemption from the Requirements of 10 CFR Part 50, Section 50.46, and Appendix K Regarding Use of M5 Cladding Material (EPID L-2022-LLE-0030) (Letter) ML23305A0942023-10-0202 October 2023 10-CW-2023-09 Post-Exam Submittal ML23270B9662023-09-27027 September 2023 10 CFR 50.55a(z)(I) Request for Relief from ASME OM Code Pump and Valve Testing Requirements for Fifth 120-Month Inservice Testing Interval ML23228A0252023-09-25025 September 2023 Issuance of Amendment No. 234 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 ML23261C3852023-09-25025 September 2023 Safety Evaluation for Operating Quality Assurance Manual Revision 36A ML23166B0882023-09-20020 September 2023 Issuance of Amendment No. 233 for Adoption of Alternative Source Term and Revision of Technical Specifications ML23206A1992023-09-15015 September 2023 Regulatory Audit Summary Regarding License Amendment and Regulatory Exemptions Request for Fuel Transition to Framatome Gaia Fuel (Epids L-2022-LLA-0150 and L-2022-LLE-0030) IR 05000483/20234012023-09-13013 September 2023 NRC Security Baseline Inspection Report 05000483/2023401 ML23240A7572023-08-31031 August 2023 NRC Initial Operator Licensing Examination Approval 05000483/2023301 IR 05000483/20230052023-08-23023 August 2023 Updated Inspection Plan for Callaway Nuclear Power Plant, Unit 1 (Report 05000483/2023005) - Mid Cycle Letter 2023 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 ML23219A1392023-08-15015 August 2023 Request for Withholding Information from Public Disclosure 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 ML23215A1972023-08-0303 August 2023 Supplement to License Amendment and Exemption Request Regarding Use of Framatome Gaia Fuel (LDCN 22-0002) 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 IR 05000483/20230022023-07-10010 July 2023 Integrated Inspection Report 05000483/2023002 ML23174A1272023-06-23023 June 2023 Cw FFD Document Request List 2023 ML23171A9942023-06-22022 June 2023 Acceptance of Request for Approval of Operating Quality Assurance Manual Revision 36a 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) IR 05000483/20230112023-06-15015 June 2023 Comprehensive Engineering Team Inspection (CETI) Inspection Report 05000483/2023011 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 ML23158A1462023-06-13013 June 2023 Notification of Post-Approval Site Inspection for License Renewal and Request for Information Inspection (05000483/2023010) 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 . ML23093A0952023-05-10010 May 2023 Issuance of Amendment No. 232 Regarding Technical Specification Changes for Spent Fuel Storage 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) ML23129A7942023-05-0909 May 2023 Post-Audit Supplement to License Amendment Request and Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (Iepid L-2022-LLA-0150 and EPID L-2022-LLE-0030) ML23122A3172023-05-0808 May 2023 Review of the Spring 2022 Steam Generator Tube Inservice Inspections ML23118A3492023-05-0808 May 2023 Request for Withholding Information from Public Disclosure 2024-01-29
[Table view] Category:License-Application for Facility Operating License (Amend/Renewal) DKT 50
MONTHYEARULNRC-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) ML23215A1972023-08-0303 August 2023 Supplement to License Amendment and Exemption Request Regarding Use of Framatome Gaia Fuel (LDCN 22-0002) ML23088A1202023-03-29029 March 2023 Application to Revise Technical Specifications to Adopt TSTF-501-A, Rev. 1, Evaluation of the Proposed Change ML23088A1242023-03-29029 March 2023 Attachment 4: List of Commitments 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-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 ML22307A3142022-11-0303 November 2022 Attachment 2: Proposed Technical Specification 5.5.16 Changes (Markup) ML22307A3122022-11-0303 November 2022 Evaluation of the Proposed Change ML22307A3152022-11-0303 November 2022 Attachment 3: Proposed Technical Specification 5.5.16 Changes (Clean Pages) ML22307A3132022-11-0303 November 2022 Attacchment 1: 54032-CALC-01, Revision 1,Callaway Plant: Evaluation of Risk Significance of Permanent ILRT Extension ML22285A1192022-10-12012 October 2022 Attachment 2 to Enclosure 1: Revised Clean Technical Specifications ML22285A1242022-10-12012 October 2022 Attachment 7 to Enclosure 1: ANP-3943NP, Callaway Small Break LOCA Analysis with Gaia Fuel Design, Revision 1, Dated October 2022 ML22285A1232022-10-12012 October 2022 Attachment 6 to Enclosure 1: ANP-3944NP, Callaway Realistic Large Break LOCA Analysis with Gaia Fuel Design, Revision 1, Dated October 2022 ML22285A1222022-10-12012 October 2022 Attachment 5 to Enclosure 1: ANP-3947NP, Callaway Unit 1 License Amendment Request Inputs for Use of Framatome Fuel, Revision 3, Dated October 2022 ML22285A1182022-10-12012 October 2022 Attachment 1 to Enclosure 1: Marked-Up Existing Technical Specifications ML22285A1172022-10-12012 October 2022 Enclosure 1: Description and Assessment of the Proposed Change ML22285A1202022-10-12012 October 2022 Attachment 3 to Enclosure 1: Marked-Up Technical Specifications Bases (for Information Only) ML22285A1252022-10-12012 October 2022 Attachment 8 to Enclosure 1: ANP-3969NP, Callaway Non-LOCA Summary Report, Revision 2, Dated October 2022 ULNRC-06768, Attachment 4 to Enclosure 1: Framatome Affidavits for Withholding from Public Disclosure2022-10-0707 October 2022 Attachment 4 to Enclosure 1: Framatome Affidavits for Withholding from Public Disclosure ML22242A2932022-08-29029 August 2022 Attachment 5 to Enclosure 1 - Criticality Safety Evaluation Report ML22242A1242022-08-29029 August 2022 Enclosure 1: Description and Assessment of the Proposed Change ML22242A1262022-08-29029 August 2022 Attachment 2 to Enclosure 1 - Revised Clean Technical Specifications ML22242A1272022-08-29029 August 2022 Attachment 3 to Enclosure 1 - Marked-Up Technical Specification Bases ML22242A1252022-08-29029 August 2022 Attachment 1 to Enclosure 1 - Marked-Up Existing Technical Specifications ML22216A2412022-08-0404 August 2022 Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspections (LDCN 21-0013) - Description and Assessment ML22181B1392022-06-30030 June 2022 Attachment 9 - Responses to NRC Audit Questions ULNRC-06723, Attachment 4 to Enclosure 1 - Holtec Affidavit for Withholding2022-06-30030 June 2022 Attachment 4 to Enclosure 1 - Holtec Affidavit for Withholding ML22181B1382022-06-30030 June 2022 Attachment 8 - Revised Operating License Changes ML22181B1372022-06-30030 June 2022 Attachment 7 - Proposed Operating License Changes (Mark-up) ML22181B1312022-06-30030 June 2022 Attachment 1 - Replacement for Attachment 1, Description and Assessment, of ULNRC-06688 ML22181B1352022-06-30030 June 2022 Attachment 5 - Replacement for Attachment 5, Cross-Reference of TSTF-505 and Callaway Technical Specifications, of ULNRC-06688 ML22153A1762022-06-0202 June 2022 Enclosure 1 - Description and Assessment of the Proposed Change ML22153A1752022-06-0202 June 2022 ULNRC-06729: Application for Technical Specification Change and Exemption Request Regarding Transition to Framatome Fuel, LDCN 22-0002 ML22153A1812022-06-0202 June 2022 Attachment 5 - Non-Proprietary Version of Licensing Summary Report ML22039A3192022-02-0808 February 2022 Enclosure 1: Callaway Plant - Description of the Proposed Changes ML22027A8072022-01-27027 January 2022 Enclosure 2: Callaway, Unit 1, License Amendment Request for Risk-Informed Approach to Resolution of Generic Letter 2004-02 ULNRC-06690, Enclosure 5: Callaway, Unit 1, LAR Supplement to Address Audit Discussion Points Summarized in NRC Letter Dated September 14, 2021 (ML21238A138)2022-01-27027 January 2022 Enclosure 5: Callaway, Unit 1, LAR Supplement to Address Audit Discussion Points Summarized in NRC Letter Dated September 14, 2021 (ML21238A138) ML21335A4532021-12-0101 December 2021 Enclosure 1: Full Scope Implementation of Alternative Source Term - Evaluation of Proposed Changes ML21335A4522021-12-0101 December 2021 Supplement to License Amendment Request for Adoption of Alternative Source Term and Revision of Technical Specifications ML21328A1842021-11-24024 November 2021 Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505, LDCN 20-0007 ML21294A4042021-10-21021 October 2021 Enclosure 4 - Information Supporting Justification of Excluding Sources of Risk Not Addressed by the PRA Models ML21294A4102021-10-21021 October 2021 Enclosure 10 - Program Implementation ML21294A4112021-10-21021 October 2021 Enclosure 11 - Monitoring Program ML21294A4122021-10-21021 October 2021 Enclosure 12 - Risk Management Action Examples ML21294A4092021-10-21021 October 2021 Enclosure 9 - Key Assumptions and Sources of Uncertainty ML21294A4082021-10-21021 October 2021 Enclosure 8 - Attributes of the Real Time Risk Model ML21294A4072021-10-21021 October 2021 Enclosure 7 - PRA Model Update Process ML21294A4062021-10-21021 October 2021 Enclosure 6 - Justification of Application of At-Power PRA Models to Shutdown Modes ML21294A4032021-10-21021 October 2021 Enclosure 3 - Information Supporting Technical Adequacy of PRA Models Without PRA Standards Endorsed by Regulatory Guide 1.200, Revision 2 2023-08-03
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'W Ameren MISSOURI June 17, 2014 ULNRC-06125 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Ladies and Gentlemen:
10 CFR 2.101 10 CFR 2.109(b) 10 CFR 50.4 10 CFR 50.30 10 CFR 51.53(c) 10 CFR 54 DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO. FACILITY OPERATING LICENSE NPF-30 AMENDMENT37TOTHECALLAWAYLRA
References:
- 1) ULNRC-05830 dated December 15,2011 Callaway Plant By the Reference
!letter, Union Electric Company (Ameren Missouri) submitted a license renewal application (LRA) for Callaway Plant Unit 1. As a result of a phone call with the staff on June 12, 2014 and after further investigation, the loss of containment tendon prestress associated with the containment tendon predicted lower limit (PLL) time-limited aging analysis (TLAA) is revised to be dispositioned under 10 CFR 54.21 ( c )(1 )(iii) and managed by the Concrete Containment Tendon Prestress program for the period of extended operation.
Enclosure 1 of this letter provides LRA Amendment 3 7, which modifies the LRA to change the containment tendon PLL analysis from a TLAA disposition category under 10 CFR 54.21(c)(l)(ii) to a TLAA disposition category under 10 CFR 54.21(c)(l)(iii).
There are no changes to license renewal commitments contained in this transmittal.
If you have any questions with regard to this amendment, please contact me at (573) 489-9435 or Roger Wink at (314) 225-1561.
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PO Box 620 Fulton, MD 65251 AmerenMissouri.com STARS* Alliance **************
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ULNRC-06125 June 17, 2014 Page2 I declare under penalty of perjury that the foregoing is true and correct. Sincerely, Executed on: J U.V\e l7' ----------------------
Sarah Kovaleski Director, Engineering Design DS/nls Enclosure 1: Amendment 3 7, LRA Changes ULNRC-06125 June 17, 2014 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. John Daily, Senior Project Manager Project Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 0-11F1 Washington, DC 20555 Mr. Fred Lyon Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 0-8B 1 Washington, DC 20555-2738 Mr. Gregory A. Pick U.S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 ULNRC-06125 June 17, 2014 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 Tech Spec ULNRC Distribution:
F. M. Diya D. W. Neterer L. H. Graessle B.L.Cox M. A. McLachlan G. S. Kremer S. G. Kovaleski J. S. Geyer S.M. Maglio T. B. Elwood Corporate Communications NSRB Secretary B. C. Daniels R. C. Wink STARS Regulatory Affairs Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP) Missouri Public Service Commission Ms. Leanne Tippett-Mosby (DNR) E. A. Blocher (STARS PAM COB)
ULNRC-06125 June 17, 2014 Enclosure 1 Amendment 37, LRA Changes Enclosure 1 Summary Table Page 1 of 6 Affected LRA Section LRA As-Submitted Paae Number(s)
Table 4.1-1 TLM Category 4 4.1-5 Section 4.5 4.5-1 throu_g_h 4.5-3 Section A3.4 A-31 ULNRC-06125 June 17, 2014 Enclosure 1 Callaway Plant License Renewal Application Amendment 37 Page 2 of 6 Revised TLAA Category 4 of Table 4.1-1 to change the disposition category for the concrete containment tendon prestress TLAA associated with the predicted lower limit TLAA from Projection (10 CFR 54.21(c)(1)(ii))
to Aging Management (10 CFR 54.21 ( c )(1 )(iii)). TLAA Category 4 of Table 4.1-1 (Page 4.1-5) is revised as follows (new text shown underlined and deleted text shown in strikethrough):
Table 4.1-1 List of TLAAs TLAA Disposition S*eetion Cate.go 1> 4. Concrete Containment Tendon Prestress i, ii, iii 4.5 ULNRC-06125 June 17, 2014 Enclosure 1 Callaway Plant License Renewal Application Amendment 37 Page 3 of6 Revised Section 4.5 to change the disposition category for the concrete containment tendon prestress TLAA associated with the predicted lower limit TLAA from Projection (10 CFR 54.21(c)(1)(ii))
to Aging Management (10 CFR 54.21(c)(1)(iii)).
Section 4.5 (Pages 4.5-1 through 4.5-3) is revised as follows (new text shown underlined and deleted text shown in strikethrough):
4.5 CONCRETE CONTAINMENT TENDON PRESTRESS The Callaway containment structure is a prestressed, post-tensioned concrete structure with a cylindrical wall, a hemispherical dome, and a flat foundation slab. Post-tensioned tendons compress the concrete and permit the structure to withstand design basis accident internal pressures.
The Callaway post-tensioning system consists of the following tendon groups:
- 86 vertical, inverted U-shaped tendons, extending through the full height of the cylindrical walls and over the dome, and anchored at the bottom of the base slab.
- 165 horizontal hoop tendons. Together, 135 cylinder hoop tendons and 30 dome hoop tendons make up the horizontal tendon group. The 135 cylinder hoop tendons are anchored at buttresses located 240 degrees apart. Three adjacent cylinder tendons anchored at alternate buttresses result in two complete hoop tendons. The 30 hemispherical dome hoop tendons start at the springline and continue up to an approximate 45-degree vertical angle from the springline.
The inverted U-shaped tendons discussed above are also utilized to prestress the hemispherical dome. Each tendon consists of approximately 170, % in. high strength steel wires. The ultimate strength of each tendon is approximately 1 ,000 tons. The prestressing load is transferred to the steel bearing plates embedded in the structure.
The unbonded tendons are installed in tendon ducts (sheathing), which is filled with a petroleum-based corrosion inhibitor after tensioning.
The steel tendons, in tension, relax with time; and the concrete structure, which the tendons hold in compression, both creeps and shrinks with time. Therefore, to ensure the integrity of the containment pressure boundary under design basis accident loads, tendon surveillances are performed under the inservice inspection program per ASME Section XI Subsection IWL. The acceptance criteria compare the individual tendons against the predicted lower limit (PLL) force lines, and the surveillance includes a regression analysis for the vertical and horizontal tendon groups, to confirm whether average prestresses are expected to remain above their minimum required values (MRVs) for the remainder of the licensed operating period. {The dome tendons are included in the horizontal tendon group regression analysis.)
The PLL and the regression analyses predict the future performance of the post-tensioning system to the end of design life and are TLAAs.
ULNRC-06125 June 17, 2014 Enclosure 1 Page 4 of6 The tendon surveillance results from 2010, the 25-year tendon surveillance (Reference 9), found (1) no significant abnormal degradation, and (2) no lift off values from this surveillance below the predicted force line (the first action limit). The discussion below reviews the three parameters used in the implementation of the tendon surveillance program: MRV, PLL force lines, and the regression analysis.
Minimum Required Value The MRV is the average tendon prestress force used in the prestressed concrete containment design analysis.
The design prestress must account for the loss of prestressing force after the initial tensioning in accordance with Regulatory Guide 1.35.1. The MRV is the acceptance criterion for the average tendon prestressing force over the entire plant life and does not vary with the plant life. Therefore the MRV is not a TLAA, in accordance with 10 CFR 54.3(a) criterion
- 3. Predicted Lower Limit The Concrete Containment Tendon Prestress program (Section 83.3). which is part of the ASME Section XI. Subsection IWL lnservice Inspection program. manages loss of tendon prestress.
Predicted force lines are incorporated in the tendon surveillanee Concrete Containment Tendon Prestress program to identify any abnormal degradation in tendon prestressing force. The predicted loss lines determine the PLL force lines which are the acceptance criteria of individual tendons. The calculations of PLL lines are consistent with NRC Regulatory Guide 1.35.1, Determining Prestressing Forces for Inspection of Prestressed Concrete Containments. As part of the Tendon Surveillance program, deseribed in Appendix B, Seetion 83.3, the PLL foree lines will be extended to 60 years. Actual measured values for each tendon are compared to their respective PLL values. with acceptance criteria consistent with ASME Section XI. Subsection IWL requirements.
+J::Hs Therefore.
loss of tendon prestress will be managed through the period of extended operation and the TLAA is dis positioned in accordance with 10 CFR 54.21 (c)(1 )(ii) 10 CFR 54.21 (c)( 1 )(iii). Disposition:
Projection, 10 CFR 54.21(c)(1)(ii)
Aging Management.
10 CFR 54.21 (c)(1)(iiil Regression Analysis The lift-off trend lines are necessary to demonstrate that the tendon prestressing force will remain above the MRV at least until the next scheduled surveillance.
The tendon surveillances are scheduled every five years. The trend lines are calculated by regression of individual tendon lift off data and are therefore consistent with NRC Information Notice 99-10, Revision 1 , Attachment
- 3. The regression analysis trend lines indicate lift-offs in excess of the MRV for at least 60 years. The IWL Inspection Report includes the results through the 2010, 25-year surveillance.
Table 4.5-1, Vertical Tendon Regression Analysis and Table 4.5-2, Horizontal Tendon (Cylinder and Dome) Regression Analysis summarize the input data of the 2010 regression analyses.
Figure 4.5-1, Regression Analysis of Vertical Tendons and Figure ULNRC-06125 June 17, 2014 Enclosure 1 Page 5 of 6 4.5-2, Regression Analysis of Horizontal Tendons show the results of the surveillance and the regression analyses.
The current analysis demonstrates that the average tendon prestresses in each of the vertical group and hoop tendon group will remain above their MRVs through 60 years of operation; therefore the analysis is valid for the period of extended operation.
The TLAA is dispositioned in accordance with 10 CFR 54.21 ( c)(1 )(i). Disposition:
Validation, 10 CFR 54.21(c)(1)(i)
ULNRC-06125 June 17, 2014 Enclosure 1 Page 6 of6 Appendix A Final Safety Analysis Report Supplement A3.4 CONCRETE CONTAINMENT PRESTRESS Predicted Lower Limit Predicted lower limit force lines are incorporated in the tendon surveillanee Concrete Containment Tendon Prestress program to identify any abnormal degradation in tendon prestressing force. The calculations of predicted lower limit lines are consistent with NRC Regulatory Guide 1.35.1. 1\s part of the Tendon Surveillanee program, deseribed in Seetion 1\2.3, the PLL foree lines will be extended to 60 years. Actual measured values for each tendon are compared to their respective PLL values. with acceptance criteria consistent with ASME Section XI. Subsection IWL requirements.
+ffis.. Therefore.
loss of tendon prestress will be managed through the period of extended operation and the TLAA is dispositioned in accordance with 10 CFR 54.21(e)(1)(ii) 10 CFR 54.21(c)(1)(iii). Regression Analysis The trend lines are calculated by regression of individual tendon lift off data and are consistent with NRC Information Notice 99-10, Degradation of Prestressing Tendon Systems in Prestressed Concrete Containments , Revision 1, Attachment
- 3. The regression analysis trend lines indicate lift-offs in excess of the MRV for at least 60 years ; therefore the analysis is valid for the period of extended operation.
The TLAA is dispositioned in accordance with 10 CFR 54.21 (c)(1 )(i). Callaway Plant Unit 1 License Renewal Application Amendment 37 Page A-31