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MONTHYEARND-21-0926, ITAAC Closure Notification on Completion of ITAAC C.2.6.09.03a (Index Number 660)2021-10-21021 October 2021 ITAAC Closure Notification on Completion of ITAAC C.2.6.09.03a (Index Number 660) Project stage: Request ND-21-0968, ITAAC Closure Notification on Completion of ITAAC E.3.9.06.00.04 (Index Number 862)2021-10-27027 October 2021 ITAAC Closure Notification on Completion of ITAAC E.3.9.06.00.04 (Index Number 862) Project stage: Request ND-21-0973, Vogtie Electric Generating Plant, Unit 3, ITAAC Closure Notification on Completion of Item 2.3.06.05a.i (Index Number 361)2021-10-29029 October 2021 Vogtie Electric Generating Plant, Unit 3, ITAAC Closure Notification on Completion of Item 2.3.06.05a.i (Index Number 361) Project stage: Request ML21305B6172021-11-0101 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number E.3.9.06.00.04 (Index No. 862) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21305A5112021-11-0101 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.3.06.05a.i (Index No. 361) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21342A2922021-11-0202 November 2021, 9 December 2021 Update to Targeted Inspections, Tests, Analyses, and Acceptance Criteria for Vogtle Electric Generating Plant Unit 3 and 4 Project stage: Request ND-21-0982, ITAAC Closure Notification on Completion of Item 2.3.13.05.1 (Index Number 462)2021-11-0303 November 2021 ITAAC Closure Notification on Completion of Item 2.3.13.05.1 (Index Number 462) Project stage: Request ND-21-0992, ITAAC Closure Notification on Completion of Item 3.3.00.10.i (Index Number 815)2021-11-0404 November 2021 ITAAC Closure Notification on Completion of Item 3.3.00.10.i (Index Number 815) Project stage: Request ML21309A0932021-11-0505 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.3.13.05.i (Index No. 462) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-0377, ITAAC Closure Notification on Completion of ITAAC Item 2.2.01.11a.iii (Index Number 116)2021-11-0505 November 2021 ITAAC Closure Notification on Completion of ITAAC Item 2.2.01.11a.iii (Index Number 116) Project stage: Request ND-20-0801, ITAAC Closure Notification on Completion of ITAAC 3.3.00.01 (Index Number 759)2021-11-0808 November 2021 ITAAC Closure Notification on Completion of ITAAC 3.3.00.01 (Index Number 759) Project stage: Request ND-21-0995, ITAAC Closure Notification on Completion of ITAAC 2.1.01.04 (Index Number 4)2021-11-10010 November 2021 ITAAC Closure Notification on Completion of ITAAC 2.1.01.04 (Index Number 4) Project stage: Request ND-21-0167, ITAAC Closure Notification on Completion of ITAAC Item 3.3.00.10.ii (Index Number 816)2021-11-11011 November 2021 ITAAC Closure Notification on Completion of ITAAC Item 3.3.00.10.ii (Index Number 816) Project stage: Request ML21342A2052021-11-12012 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 3.3.00.10.i (Index No. 815) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-0038, ITAAC Closure Notification on Completion of ITAAC 3.3.00.02a.i.d (Index Number 763)2021-11-12012 November 2021 ITAAC Closure Notification on Completion of ITAAC 3.3.00.02a.i.d (Index Number 763) Project stage: Request ML21319A3512021-11-15015 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 3.3.00.02a.i.d (Index No. 763) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21319A1622021-11-15015 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.2.01.11a.iii (Index No. 116) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21320A3372021-11-16016 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 3.3.00.01 (Index No. 759) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-0713, ITAAC Closure Notification on Completion of ITAAC Item 2.7.04.03 (Index Number 716)2021-11-17017 November 2021 ITAAC Closure Notification on Completion of ITAAC Item 2.7.04.03 (Index Number 716) Project stage: Request ML21322A3042021-11-18018 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.7.04.03 (Index No. 716) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-1010, ITAAC Closure Notification on Completion of ITAAC C.2.6.09.09 (Index Number 670)2021-11-18018 November 2021 ITAAC Closure Notification on Completion of ITAAC C.2.6.09.09 (Index Number 670) Project stage: Request ML21326A1182021-11-22022 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 3.3.00.10.ii (Index No. 816) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-1025, Unit 4 - ITAAC Closure Notification on Completion of ITAAC Item 2.5.05.02.i (Index Number 565)2021-11-24024 November 2021 Unit 4 - ITAAC Closure Notification on Completion of ITAAC Item 2.5.05.02.i (Index Number 565) Project stage: Request ML21334A4422021-11-30030 November 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.1.01.04 (Index No. 4) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-0757, ITAAC Closure Notification on Completion of ITAAC 2.2.04.02a (Index Number 220)2021-12-0202 December 2021 ITAAC Closure Notification on Completion of ITAAC 2.2.04.02a (Index Number 220) Project stage: Request ML21343A1072021-12-0606 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.2.04.02a (Index No. 220) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-0769, ITAAC Closure Notification on Completion of ITAAC 2.2.02.02a (Index Number 120)2021-12-0707 December 2021 ITAAC Closure Notification on Completion of ITAAC 2.2.02.02a (Index Number 120) Project stage: Request ND-20-1378, ITAAC Closure Notification on Completion of ITAAC 3.3.00.02a.i.b (Index Number 761)2021-12-0808 December 2021 ITAAC Closure Notification on Completion of ITAAC 3.3.00.02a.i.b (Index Number 761) Project stage: Request ND-21-1036, ITAAC Closure Notification on Completion of ITAAC Item 2.2.03.12a.i (Index Number 214)2021-12-0909 December 2021 ITAAC Closure Notification on Completion of ITAAC Item 2.2.03.12a.i (Index Number 214) Project stage: Request ND-21-1084, ITAAC Closure Notification on Completion of ITAAC 2.3.03.03c (Index Number 322)2021-12-0909 December 2021 ITAAC Closure Notification on Completion of ITAAC 2.3.03.03c (Index Number 322) Project stage: Request ML21344A0972021-12-10010 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.3.03.03c (Index No. 322) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21348A7312021-12-14014 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number C.2.6.09.03a (Index No. 660) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-0779, ITAAC Closure Notification on Completion of ITAAC 2.3.13.02 (Index Number 459)2021-12-15015 December 2021 ITAAC Closure Notification on Completion of ITAAC 2.3.13.02 (Index Number 459) Project stage: Request ND-21-1030, ITAAC Closure Notification on Completion of ITAAC 2.1.02.12a.iv (Index Number 56)2021-12-15015 December 2021 ITAAC Closure Notification on Completion of ITAAC 2.1.02.12a.iv (Index Number 56) Project stage: Request ML21350A0422021-12-16016 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.2.02.02a (Index No. 120) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-1022, Vogtie Electric Generating Plant, Unit 3, ITAAC Closure Notification on Completion of ITAAC 2.3.02.05.1 (Index Number 291)2021-12-16016 December 2021 Vogtie Electric Generating Plant, Unit 3, ITAAC Closure Notification on Completion of ITAAC 2.3.02.05.1 (Index Number 291) Project stage: Request ND-21-0993, ITAAC Closure Notification on Completion of ITAAC Item 2.1.02.15 (Index Number 67)2021-12-16016 December 2021 ITAAC Closure Notification on Completion of ITAAC Item 2.1.02.15 (Index Number 67) Project stage: Request ND-21-0270, ITAAC Closure Notification on Completion of ITAAC 2.6.09.05a (Index Number 644)2021-12-17017 December 2021 ITAAC Closure Notification on Completion of ITAAC 2.6.09.05a (Index Number 644) Project stage: Request ML21355A2862021-12-20020 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.3.02.05.i (Index No. 291) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21354A4172021-12-20020 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.3.13.02 (Index No. 459) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21355A2882021-12-21021 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.1.02.12a.iv (Index No. 56) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-0802, ITAAC Closure Notification on Completion of ITAAC 2.2.01.02a (Index Number 91)2021-12-21021 December 2021 ITAAC Closure Notification on Completion of ITAAC 2.2.01.02a (Index Number 91) Project stage: Request ND-21-1095, Resubmittal of Notice of Uncompleted ITAAC 225-days Prior to Initial Fuel Load Item 2.1.03.06.1 (Index Number 75)2021-12-21021 December 2021 Resubmittal of Notice of Uncompleted ITAAC 225-days Prior to Initial Fuel Load Item 2.1.03.06.1 (Index Number 75) Project stage: Request ND-21-0956, ITAAC Closure Notification on Completion of ITAAC Item 2.1.03.07.i (Index Number 78)2021-12-21021 December 2021 ITAAC Closure Notification on Completion of ITAAC Item 2.1.03.07.i (Index Number 78) Project stage: Request ML21357A0042021-12-22022 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 3.3.00.02a.i.b (Index No. 761) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21357A0022021-12-22022 December 2021 Uncompleted ITAAC Notification Checklist (UINC) 2.1.03.06.i for ITAAC (Index No. 75) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21357A0012021-12-22022 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.2.01.02a (Index No. 91) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ML21357A0272021-12-23023 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.6.09.05a (Index No. 644) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request ND-21-0990, ITAAC Closure Notification on Completion of ITAAC Item 2.5.05.04 (Index Number 572)2021-12-27027 December 2021 ITAAC Closure Notification on Completion of ITAAC Item 2.5.05.04 (Index Number 572) Project stage: Request ML21364A0022021-12-29029 December 2021 ITAAC Closure Verification Evaluation Form (Vef) for ITAAC Number 2.5.05.04 (Index No. 572) for Vogtle Unit 3 Combined License (VOG3) Project stage: Request 2021-11-05
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Category:Letter
MONTHYEARML24032A0252024-02-0505 February 2024 NRC Initial Test Program and Operational Programs Integrated Inspection Report 05200026-2023009 ML24010A0712024-01-31031 January 2024 Exemption from Select Requirements of 10 CFR Part 73 (Security Notifications, Reports and Recordkeeping and Suspicious Activity Reporting) ML24031A6102024-01-31031 January 2024 Cyber Security Inspection Report 05200026/2024401 - Public ML24029A0592024-01-30030 January 2024 Request for Withholding Information from Public Disclosure Responses to NRC Request for Additional Information for Refueling Outage 1R24 Steam Generator Tube Inspection Report Enclosure 2, GAE-NRCD-RF-LR-000002 P-Attachment, Rev. 0 ML24016A1132024-01-30030 January 2024 Correction of Unit 1 Amendment Nos. 96 and 190 and Unit 2 Amendment Nos. 74 and 173 Adoption of Standard Technical Specifications Westinghouse Plants NL-24-0031, Inservice Inspection Program Owner'S Activity Report (OAR-1) for Outage 2R232024-01-29029 January 2024 Inservice Inspection Program Owner'S Activity Report (OAR-1) for Outage 2R23 IR 05000424/20244032024-01-26026 January 2024 Information Request for the Cyber-Security Baseline Inspection, Notification to Perform Inspection 05000424/2024403; 05000425/2024403 NL-24-0020, Plan, Unit 1 Responses to NRC Request for Additional Information for Refueling Outage 1R24 Steam Generator Tube Inspection Report2024-01-22022 January 2024 Plan, Unit 1 Responses to NRC Request for Additional Information for Refueling Outage 1R24 Steam Generator Tube Inspection Report ML23347A2092024-01-17017 January 2024 Voluntary Requests for Data, Information, And/Or Observation ML23279A0042024-01-17017 January 2024 Amendment No. 194 to Remove Combined License Appendix C NL-23-0926, Correction of Technical Specification Typographical Error2024-01-12012 January 2024 Correction of Technical Specification Typographical Error ML23341A2042024-01-12012 January 2024 Request for Additional Information Exemption Requests for Physical Barriers (EPID L-2023-LLE-0018 & L-2023-LLE-0021) ML23345A1312024-01-0303 January 2024 Withholding Letter - SNC Fleet - Physical Barriers Exemption (L-2023-LLE-0018 and L-2023-LLE-0021) ML23317A2072023-12-22022 December 2023 Issuance of Amendments 223 and 206 Regarding Revision to Technical Specifications to Adopt TSTF-339-A, Relocate Technical Specification Parameters to the COLR Consistent with WCAP-1448 ML23335A1222023-12-19019 December 2023 Safety Evaluation Regarding Implementation of Mitigating Strategies Related to Order EA-12-049 (EPID L-2023-LRQ-0002) - Letter ML23353A1702023-12-19019 December 2023 LAR-22-002, TS 3.8.3 Inverters Operating Completion Time Extension Letter ML23310A2922023-12-0707 December 2023 Issuance of Amendment for Exception to Regulatory Guide 1.163, LAR 23 007 ML23339A1812023-12-0707 December 2023 Correction Letter Regarding License Amendment Request: More Restrictive Action for Technical Specification 3.1.9 ML23338A2182023-12-0606 December 2023 Project Manager Reassignment NL-23-0878, Request for Exemption from Security Event Notification Implementation2023-11-29029 November 2023 Request for Exemption from Security Event Notification Implementation ML23289A1632023-11-28028 November 2023 Letter and Amendment 195 and 192 LAR-23-006R1 TS 3.1.9 More Restrictive Action NL-23-0827, Response to Requests for Additional Information for a License Amendment Request and a Proposed Alternative Related to TS 3.4.142023-11-17017 November 2023 Response to Requests for Additional Information for a License Amendment Request and a Proposed Alternative Related to TS 3.4.14 ML23318A4582023-11-14014 November 2023 Integrated Inspection Report 05200025/2023003 ML23312A3502023-11-14014 November 2023 Integrated Inspection Report 05200026/2023003 ML23306A3552023-11-0808 November 2023 NRC Initial Test Program and Operational Programs Integrated Inspection Report 052000/262023008 ML23268A0572023-11-0707 November 2023 Issuance of Amendments 194 & 191 Request for License Amendment Relocation of Technical Specification 3.7.9, Spent Fuel Pool Makeup Water Sources (LAR-23-003) IR 05000424/20234022023-11-0606 November 2023 Security Baseline Inspection Report 05000424/2023402 and 05000425/2023402 IR 05000424/20230032023-10-27027 October 2023 Integrated Inspection Report 05000424/2023003 and 05000425/2023003 ML23291A1512023-10-18018 October 2023 Information Request for the Cyber Security Baseline Inspection, Notification to Perform Inspection 0520026/2024401 ML23263A9852023-10-12012 October 2023 Issuance of Amendments Nos. 221 and 204, Regarding Technical Specification 5.5.11.C, Acceptance Criteria for Charcoal Filter Testing ML23283A0472023-10-0808 October 2023 Neop Letter Dated October 8, 2023 - Vogtle 3 & 4 - TS 3.7.6 License Amendment Request NL-23-0750, Response to Second Request for Additional Information Regarding License Amendment Request: Technical Specification Revision to Adopt TSTF-339-A, Relocate Technical Specification Parameters to the Colr2023-10-0404 October 2023 Response to Second Request for Additional Information Regarding License Amendment Request: Technical Specification Revision to Adopt TSTF-339-A, Relocate Technical Specification Parameters to the Colr NL-23-0745, Refueling Outage 1R24 Steam Generator Tube Inspection Report2023-09-22022 September 2023 Refueling Outage 1R24 Steam Generator Tube Inspection Report ML23254A2032023-09-13013 September 2023 Initial Test Program and Operational Programs Inspection Report 05200025/2023013 ML23241B0212023-09-12012 September 2023 Review of Quality Assurance Topical Report ML23234A2352023-09-0808 September 2023 Request for Withholding Information from Public Disclosure Notification of Full Compliance of Required Action for NRC Order EA-12-049 Mitigation Strategies for Beyond-Design-Basis External Events IR 05000424/20230912023-09-0505 September 2023 Plan Units 1 and 2 - NRC Investigation Report 2-2022-006 and Notice of Violation - NRC Inspection Report 05000424/2023091 and 05000425/2023091 ML23234A3002023-09-0101 September 2023 NRC Integrated Inspection Report 05200026/2023003 ML23243A0092023-08-31031 August 2023 Updated Inspection Plan for Vogtle Electric Generating Plant, Units 3 & 4 (Report 05200025 2023005 & 05200026 2023005) NL-23-0695, Response to Round 2 Request for Additional Information Regarding License Amendment Request for Technical Specification 3.8.3, Inverters Operating, Completion Time Extension (LAR-22-002S2)2023-08-31031 August 2023 Response to Round 2 Request for Additional Information Regarding License Amendment Request for Technical Specification 3.8.3, Inverters Operating, Completion Time Extension (LAR-22-002S2) ML23243B0252023-08-30030 August 2023 Exam Corporate Notification Letter (210 Day) IR 05000424/20230052023-08-29029 August 2023 Updated Inspection Plan for Vogtle Electric Generating Plant, Units 1 & 2 - Report 05000424/2023005 and 05000425/2023005 NL-23-0666, License Amendment Request: Remove Combined License Appendix C (LAR 23-008)2023-08-28028 August 2023 License Amendment Request: Remove Combined License Appendix C (LAR 23-008) 2024-02-05
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UNITED STATES NUCLEAR REGULATORY COMMISSION ADVISORY COMMITTEE ON REACTOR SAFEGUARDS WASHINGTON, DC 20555 - 0001 July 27, 2023 Mr. Daniel H. Dorman Executive Director for Operations U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
SUBJECT:
VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2, USE OF ACCIDENT TOLERANT FUEL LEAD TEST ASSEMBLIES
Dear Mr. Dorman:
During the 707th meeting of the Advisory Committee on Reactor Safeguards, July 12-14, 2023, we completed our review of the Southern Nuclear Operating Companys (SNC) license amendment request (LAR) and associated exemption requests to load accident tolerant fuel (ATF) lead test assemblies (LTAs) at Vogtle Electric Generating Plant (Vogtle), Units 1 and 2.
We also reviewed the Nuclear Regulatory Commission (NRC) staff safety evaluation (SE) report approving the loading of the LTAs and the associated exemptions. Our Fuels, Materials, and Structures subcommittee reviewed this topic on June 21, 2023. During these meetings, we had the benefit of discussions with the NRC staff and representatives from SNC. We also had the benefit of the referenced documents.
CONCLUSIONS AND RECOMMENDATION
- 1. Allowing SNC the use of four ATF LTAs (each with four higher enriched fuel rods) in Vogtle, Unit 2, will not adversely affect public safety.
- 2. Data obtained from these LTAs will inform future ATF and higher enrichment applications.
- 3. The SE report should be issued.
BACKGROUND The Vogtle, Units 1 and 2, reactors each contain 193 fuel assemblies. Each assembly consisting of a matrix of Zircaloy, ZIRLO, or Optimized ZIRLO clad fuel rods with an initial composition of natural or slightly enriched uranium dioxide (UO2) as fuel material, not to exceed 5 weight-percent (wt%) enrichment.
SNC, the licensee of Vogtle, Units 1 and 2, requests license exemptions, to allow loading four LTAs of Westinghouse PRIME Optimized Fuel Assembly designs, with each LTA containing:
D.H. Dorman Up to 132 rods with Westinghouse ADOPT UO2 pellets at a maximum of 5 wt%
enrichment and chromium coated AXIOM cladding.
Three rods with Westinghouse ADOPT UO2 pellets at a maximum of 6 wt% enrichment and chromium coated AXIOM cladding.
One rod with Westinghouse ADOPT UO2 pellets at a maximum of 6 wt% enrichment and uncoated AXIOM cladding.
The remaining rods are standard fuel material in the Integral Fuel Burnable Absorber rods.
SNC has not requested an increase in the current licensing basis burnup limit of 60 GWd/MTU.
The associated topical report for higher burnup (WCAP-18446) is currently under staff review.
The licensee indicated they plan to request high burnup extension for Vogtle, Units 1 and 2.
To support the proposed loading of the ATF LTAs, the licensee has requested exemptions to Title 10 of the Code of Federal Regulations (CFR):
10 CFR 50.46 and 10 CFR Part 50, Appendix K, to allow the use of coated AXIOM cladding, and 10 CFR 50.68(b)(7) to allow enrichment greater than 5 wt% U-235.
SNC also requested technical specification (TS) changes that amend License Condition 2.D and TSs: (1) TS 3.7.18, Fuel Assembly Storage in the Fuel Storage Pool, (2) TS 4.2.1, Fuel Assemblies, and (3) TS 4.3, Fuel Storage.
This LAR is the first request by a licensee to load fuel with increased enrichment and the complete set of Westinghouse ATF characteristics: advanced cladding, coated cladding, and doped fuel. The staff previously approved both ADOPT fuel pellets and AXIOM cladding. The staff review of Westinghouse chromium coating was informed by ATF-ISG-2020-1, which considered generic studies of chromium coating, including a phenomena identification and ranking table.
DISCUSSION SNC has conducted a thorough and detailed analysis of the effect of the ATF LTAs, including the increased enrichment, on design basis accident and transient response, core source term, and radiological dose consequences. Results indicate there are negligible changes. Large and small break loss of coolant accident (LOCA) analyses demonstrate that 10 CFR 50.46 acceptance criteria will be met. Also, the loading of the LTAs will have minimal impact on the results of the non-LOCA analyses. The effect on core physics and thermal hydraulics analysis results is negligible.
Typically, LTAs are placed in non-limiting locations. Because the limiting transient is rod ejection, SNC will not place LTAs in rod-ejection limiting locations. Within this constraint, SNC has elected to put LTAs in higher power locations to accumulate burnup under more prototypic conditions.
D.H. Dorman With respect to the fuel characteristics, the chromium coating is expected to improve the enhanced performance of the AXIOM cladding, especially with respect to corrosion resistance and hydrogen pickup. However, the SNC analyses took no credit for the presence of the chromium coating. The effect of the doping, as described in detail in the approved topical report, is to result in an increase in fuel grain size with an accompanying decrease in fission gas release. The increase in fuel enrichment, as well as a small increase in fuel density due to the doping, will result in an increase in the quantity of fissile material resulting in a postulated increase in sensitivity to reactivity-initiated accidents. This will be an important consideration for full core applications of higher enriched ATF.
Last, analysis results demonstrate the effect of the LTAs in new fuel storage and spent fuel storage are minimal; however, the aforementioned exemption to 10 CFR 50.68 (b)(7) is still required.
SUMMARY
Allowing SNC the use of four ATF LTAs (each with four higher enriched fuel rods) in Vogtle, Unit 2, will not adversely affect public safety. Data obtained from these LTAs will inform future ATF and higher enrichment applications. The SE report should be issued.
No response to this letter is required.
Sincerely, Signed by Rempe, Joy on 07/27/23 Joy L. Rempe Chairman REFERENCES
- 1. Office of Nuclear Reactor Regulation, Vogtle Electric Generating Plant, Units 1 and 2, Issuance of Amendments Nos. 220 And 203, Regarding Use Of Accident Tolerant Fuel Lead Test Assemblies (EPID L-2022-LLA-0097) [includes Safety Evaluation by the Office of Nuclear Reactor Regulation Related to Amendment No. 220 to Renewed Facility Operating License NPF-68 and Amendment No. 203 to Renewed Facility Operating License NPF-81, Southern Nuclear Operating Company, Inc., Vogtle Electric Generating Plant, Units 1 and 2], Docket Nos. 50-424 and 50-425, June 2023 (Non-Public ML23093A028)
- 2. Southern Nuclear Operating Company, Vogtle Electric Generating Plant, Units 1 and 2, License Amendment Request and Exemptions to Allow Use of Lead Test Assemblies for Accident-Tolerant Fuel, June 30, 2022 (Public ML22181B156, Non-Public ML22181B155)
- 3. Westinghouse, WCAP-18446-P/NP, Revision 0, Incremental Extension of Burnup Limit for Westinghouse and Combustion Engineering Fuel Designs, December 2020 (Public ML20350B834, Non-Public ML20349A273)
D.H. Dorman 4. Westinghouse, WCAP-18482-P/NP, Revision 0, " Westinghouse Advanced Doped Pellet Technology (ADOPTTM) Fuel, May 2020, (Public ML20132A014, Non-Public ML22005A015)
- 5. Westinghouse, WCAP-18546-P/NP, Westinghouse AXIOM Cladding for Use in Pressurized Water Reactor Fuel, March 2021 (Public ML21090A113, Non-Public ML21090A112)
- 6. U.S. NRC, ATF-ISG-2020-01, Supplemental Guidance Regarding the Chromium-Coated Zirconium Alloy Fuel Cladding Accident Tolerant Fuel Concept, January 2020 (ML19343A121)
- 7. Pacific Northwest National Laboratory, Degradation and Failure Phenomena of Accident Tolerant Fuel Concepts: Chromium Coated Zirconium Alloy Cladding, June 2019 (ML19172A154)
- 8. Southern Nuclear Operating Company, Vogtle Electric Generating Plant, Units 1 and 2, Response to NRC Requests for Information License Amendment Request and Exemptions to Allow Use of Lead Test Assemblies for Accident-Tolerant Fuel, September 13, 2022 (Public ML22256A198, Non-Public ML22256A197)
- 9. Southern Nuclear Operating Company, Vogtle Electric Generating Plant, Units 1 and 2, Post-Audit Supplement to License Amendment Request and Exemptions to Allow Use of Lead Test Assemblies for Accident-Tolerant Fuel, January 20, 2023 (Public ML23020A148, Non-Public ML23020A147)
- 10. Southern Nuclear Operating Company, Vogtle Electric Generating Plant, Units 1 and 2 License Amendment Request and Exemptions to Allow Use of Lead Test Assemblies for Accident-Tolerant Fuel, June 30, 2022 (Public ML22181B156, Non-Public ML22181B155)
- 11. Southern Nuclear Operating Company, Vogtle Electric Generating Plant, Units 1 and 2 Supplement to License Amendment Request and Exemptions to Allow Use of Lead Test Assemblies for Accident-Tolerant Fuel, May 5, 2023 (ML23125A269)
D.H. Dorman July 27, 2023
SUBJECT:
VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2, USE OF ACCIDENT TOLERANT FUEL LEAD TEST ASSEMBLIES Accession No: ML23200A306 Publicly Available (Y/N): Y Sensitive (Y/N): N If Sensitive, which category?
Viewing Rights: NRC Users or ACRS only or See restricted distribution OFFICE ACRS SUNSI Review ACRS ACRS ACRS NAME ZAbdullahi ZAbdullahi LBurkhart SMoore (LBurkhart for) JRempe DATE 7/19/23 7/19/23 7/24/23 7/24/23 7/27/23 OFFICIAL RECORD COPY