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 Nuclear Regulatory Commission 10 CFR Part 72
[NRC-2022-0049]
RIN 3150-AK76
 AGENCY: Nuclear Regulatory Commission.
 ACTION: Direct final rule.
 SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the NAC International NAC-UMS Universal Storage System listing within the “List of approved spent fuel storage casks” to include Amendment No. 9 to Certificate of Compliance No. 1015. Amendment No. 9 revises the certificate of compliance to correct the effective thermal properties for pressurized-water reactor fuel assemblies used in the certification basis ANSYS thermal models and to update modeling assumptions. In addition, this direct final rule makes editorial corrections to Amendment No. 8.
 DATES: This direct final rule is effective August 29, 2022, unless significant adverse comments are received by July 14, 2022. If this direct final rule is withdrawn as a result of such comments, timely notice of the withdrawal will be published in the 
                        **Federal Register**
                        . Comments received after this date will be considered if it is practical to do so, but the NRC is able to ensure consideration only for comments received on or before this date. Comments received on this direct final rule will also be considered to be comments on a companion proposed rule published in the Proposed Rules section of this issue of the 
                        **Federal Register**
                        .
 ADDRESSES: Submit your comments, identified by Docket ID NRC-2022-0049, at 
                        *https://www.regulations.gov*. If your material cannot be submitted using 
                        *https://www.regulations.gov,*
                         call or email the individuals listed in the 
                        **FOR FURTHER INFORMATION CONTACT**
                         section of this document for alternate instructions. For additional direction on obtaining information and submitting comments, see “Obtaining Information and Submitting Comments” in the 
                        **SUPPLEMENTARY INFORMATION**
                         section of this document.
 FOR FURTHER INFORMATION CONTACT: Bernard White, Office of Nuclear Material Safety and Safeguards; telephone: 301-415-6577, email: 
                        *Bernard.White@nrc.gov*
                         and Vanessa Cox, Office of Nuclear Material Safety and Safeguards, telephone: 301-415-8342, email: 
                        *Vanessa.Cox@nrc.gov*. Both are staff of the U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001.


SUPPLEMENTARY INFORMATION:  Table of Contents I. Obtaining Information and Submitting Comments II. Rulemaking Procedure III. Background IV. Discussion of Changes V. Voluntary Consensus Standards VI. Agreement State Compatibility VII. Plain Writing VIII. Environmental Assessment and Finding of No Significant Impact IX. Paperwork Reduction Act Statement X. Regulatory Flexibility Certification XI. Regulatory Analysis XII. Backfitting and Issue Finality XIII. Congressional Review Act XIV. Availability of Documents I. Obtaining Information and Submitting Comments A. Obtaining Information Please refer to Docket ID NRC-2022-0049 when contacting the NRC about the availability of information for this action. You may obtain publicly available information related to this action by any of the following methods: *Federal Rulemaking Website:*
                     Go to 
                    *https://www.regulations.gov*
                     and search for Docket ID NRC-2022-0049. Address questions about NRC dockets to Dawn Forder, telephone: 301-415-3407, email: 
                    *Dawn.Forder@nrc.gov*. For technical questions contact the individuals listed in the 
                    **FOR FURTHER INFORMATION CONTACT**
                     section of this document.
                *NRC's Agencywide Documents Access and Management System (ADAMS):*
                     You may obtain publicly available documents online in the ADAMS Public Documents collection at 
                    *https://www.nrc.gov/​reading-rm/​adams.html*. To begin the search, select “Begin Web-based ADAMS Search.” For problems with ADAMS, please contact the NRC's Public Document Room (PDR) reference staff at 1-800-397-4209, 301-
                    ( print page 35859)
                    415-4737, or by email to 
                    *PDR.Resource@nrc.gov*. For the convenience of the reader, instructions about obtaining materials referenced in this document are provided in the “Availability of Documents” section.
                *NRC's PDR*: You may examine and purchase copies of public documents, by appointment, at the NRC's PDR, Room P1 B35, One White Flint North, 11555 Rockville Pike, Maryland 20852. To make an appointment to visit the PDR, please send an email to 
                    *PDR.Resource@nrc.gov*
                     or call 1-800-397-4209 or 301-415-4737, between 8:00 a.m. and 4:00 p.m. (ET), Monday through Friday, except Federal holidays. B. Submitting Comments Please include Docket ID NRC-2022-0049 in your comment submission. The NRC requests that you submit comments through the Federal rulemaking website at 
                    *https://www.regulations.gov*. If your material cannot be submitted using 
                    *https://www.regulations.gov,*
                     call or email the individuals listed in the 
                    **FOR FURTHER INFORMATION CONTACT**
                     section of this document for alternate instructions. The NRC cautions you not to include identifying or contact information that you do not want to be publicly disclosed in your comment submission. The NRC will post all comment submissions at 
                    *https://www.regulations.gov*
                     as well as enter the comment submissions into ADAMS. The NRC does not routinely edit comment submissions to remove identifying or contact information. If you are requesting or aggregating comments from other persons for submission to the NRC, then you should inform those persons not to include identifying or contact information that they do not want to be publicly disclosed in their comment submission. Your request should state that the NRC does not routinely edit comment submissions to remove such information before making the comment submissions available to the public or entering the comment into ADAMS. II. Rulemaking Procedure This rule is limited to the changes contained in Amendment No. 9 to Certificate of Compliance No. 1015 and editorial corrections to Amendment No. 8 and does not include other aspects of the NAC International NAC-UMS Universal Storage System design. The NRC is using the “direct final rule procedure” to issue this amendment because it represents a limited and routine change to an existing certificate of compliance that is expected to be non-controversial. Adequate protection of public health and safety continues to be reasonably assured. The amendment to the rule will become effective on August 29, 2022. However, if the NRC receives any significant adverse comment on this direct final rule by July 14, 2022, then the NRC will publish a document that withdraws this action and will subsequently address the comments received in a final rule as a response to the companion proposed rule published in the Proposed Rules section of this issue of the 
                    **Federal Register**
                    . Absent significant modifications to the proposed revisions requiring republication, the NRC will not initiate a second comment period on this action. A significant adverse comment is a comment where the commenter explains why the rule would be inappropriate, including challenges to the rule's underlying premise or approach, or would be ineffective or unacceptable without a change. A comment is adverse and significant if: (1) The comment opposes the rule and provides a reason sufficient to require a substantive response in a notice-and-comment process. For example, a substantive response is required when: (a) The comment causes the NRC to reevaluate (or reconsider) its position or conduct additional analysis; (b) The comment raises an issue serious enough to warrant a substantive response to clarify or complete the record; or (c) The comment raises a relevant issue that was not previously addressed or considered by the NRC. (2) The comment proposes a change or an addition to the rule, and it is apparent that the rule would be ineffective or unacceptable without incorporation of the change or addition. (3) The comment causes the NRC to make a change (other than editorial) to the rule, certificate of compliance, or technical specifications. III. Background Section 218(a) of the Nuclear Waste Policy Act of 1982, as amended, requires that “[t]he Secretary [of the Department of Energy] . . . establish a demonstration program, in cooperation with the private sector, for the dry storage of spent nuclear fuel at civilian nuclear power reactor sites, with the objective of establishing one or more technologies that the [Nuclear Regulatory] Commission may, by rule, approve for use at the sites of civilian nuclear power reactors without, to the maximum extent practicable, the need for additional site-specific approvals by the Commission.” Section 133 of the Nuclear Waste Policy Act states, in part, that “[t]he Commission shall, by rule, establish procedures for the licensing of any technology approved by the Commission under Section 219(a) [sic: 218(a)] for use at the site of any civilian nuclear power reactor.” To implement this mandate, the Commission approved dry storage of spent nuclear fuel in NRC-approved casks under a general license by publishing a final rule that added a new subpart K in part 72 of title 10 of the 
                    *Code of Federal Regulations*
                     (10 CFR) entitled “General License for Storage of Spent Fuel at Power Reactor Sites” (55 FR 29181; July 18, 1990). This rule also established a new subpart L in 10 CFR part 72 entitled “Approval of Spent Fuel Storage Casks,” which contains procedures and criteria for obtaining NRC approval of spent fuel storage cask designs. The NRC subsequently issued a final rule on October 19, 2000 (65 FR 62581), that approved the NAC International NAC-UMS Universal Storage System and added it to the list of NRC-approved cask designs in § 72.214 as Certificate of Compliance No. 1015. IV. Discussion of Changes On July 30, 2021, NAC International submitted a request to the NRC to amend Certificate of Compliance No. 1015. Amendment No. 9 revises the certificate of compliance to correct the effective thermal properties for pressurized-water reactor fuel assemblies used in the certification basis ANSYS thermal models and update some modeling assumptions. This direct final rule also corrects a page number and number in a footer of Technical Specifications, Appendix B in Amendment No. 8. The changes to the aforementioned documents are identified with revisions bars in the margin of each document. As documented in the safety evaluation report, the NRC performed a safety evaluation of the proposed certificate of compliance amendment request. The NRC determined that this amendment does not reflect a significant change in design or fabrication of the cask. Specifically, the NRC determined that the design of the cask would continue to maintain confinement, shielding, and criticality control in the event of each evaluated accident condition. In addition, any resulting occupational exposure or offsite dose rates from the implementation of Amendment No. 9 would remain well within the limits specified by 10 CFR part 20, “Standards for Protection Against Radiation.” Therefore, the NRC found that there will be no significant change in the types or amounts of any effluent released, no significant increase 
                    ( print page 35860)
                    in the individual or cumulative radiation exposure, and no significant increase in the potential for or consequences from radiological accidents. The NRC determined that the amended NAC International NAC-UMS Universal Storage System design, when used under the conditions specified in the certificate of compliance, the technical specifications, and the NRC's regulations, will meet the requirements of 10 CFR part 72; therefore, adequate protection of public health and safety will continue to be reasonably assured. When this direct final rule becomes effective, persons who hold a general license under § 72.210 may, consistent with the license conditions under § 72.212, load spent nuclear fuel into NAC International NAC-UMS Universal Storage System that meet the criteria of Amendment No. 9 to Certificate of Compliance No. 1015. V. Voluntary Consensus Standards The National Technology Transfer and Advancement Act of 1995 (Pub. L. 104-113) requires that Federal agencies use technical standards that are developed or adopted by voluntary consensus standards bodies unless the use of such a standard is inconsistent with applicable law or otherwise impractical. In this direct final rule, the NRC revises the NAC International NAC-UMS Universal Storage System design listed in § 72.214, “List of approved spent fuel storage casks.” This action does not constitute the establishment of a standard that contains generally applicable requirements. VI. Agreement State Compatibility Under the “Agreement State Program Policy Statement” approved by the Commission on October 2, 2017, and published in the 
                    **Federal Register**
                     on October 18, 2017 (82 FR 48535), this direct final rule is classified as Compatibility Category NRC—Areas of Exclusive NRC Regulatory Authority. The NRC program elements in this category are those that relate directly to areas of regulation reserved to the NRC by the Atomic Energy Act of 1954, as amended, or the provisions of 10 CFR chapter I. Therefore, compatibility is not required for program elements in this category. Although an Agreement State may not adopt program elements reserved to the NRC, and the Category “NRC” does not confer regulatory authority on the State, the State may wish to inform its licensees of certain requirements by means consistent with the particular State's administrative procedure laws. VII. Plain Writing The Plain Writing Act of 2010 (Pub. L. 111-274) requires Federal agencies to write documents in a clear, concise, and well-organized manner. The NRC has written this document to be consistent with the Plain Writing Act as well as the Presidential Memorandum, “Plain Language in Government Writing,” published June 10, 1998 (63 FR 31885). VIII. Environmental Assessment and Finding of No Significant Impact Under the National Environmental Policy Act of 1969, as amended, and the NRC's regulations in 10 CFR part 51, “Environmental Protection Regulations for Domestic Licensing and Related Regulatory Functions,” the NRC has determined that this direct final rule, if adopted, would not be a major Federal action significantly affecting the quality of the human environment and, therefore, an environmental impact statement is not required. The NRC has made a finding of no significant impact on the basis of this environmental assessment. A. The Action The action is to amend § 72.214 to revise the NAC International NAC-UMS Universal Storage System listing within the “List of approved spent fuel storage casks” to include Amendment No. 9 to Certificate of Compliance No. 1015 and correct Amendment No. 8. B. The Need for the Action This direct final rule amends the certificate of compliance for the NAC International NAC-UMS Universal Storage System design within the list of approved spent fuel storage casks to allow power reactor licensees to store spent fuel at reactor sites in casks with the approved modifications under a general license. Specifically, Amendment No. 9 revises the certificate of compliance to correct the effective thermal properties for pressurized-water reactor fuel assemblies used in the certification basis ANSYS thermal models and update some modeling assumptions. This direct final rule also corrects a page number and number in a footer of Technical Specifications, Appendix B in Amendment No. 8. C. Environmental Impacts of the Action On July 18,1990 (55 FR 29181), the NRC issued an amendment to 10 CFR part 72 to provide for the storage of spent fuel under a general license in cask designs approved by the NRC. The potential environmental impact of using NRC-approved storage casks was analyzed in the environmental assessment for the 1990 final rule. The environmental assessment for this Amendment No. 9 is based on the environmental assessment for the July 18, 1990, final rule. Referencing past environmental assessments is a standard process under the National Environmental Policy Act of 1969, as amended. The NAC International NAC-UMS Universal Storage System is designed to mitigate the effects of design basis accidents that could occur during storage. Design basis accidents account for human-induced events and the most severe natural phenomena reported for the site and surrounding area. Postulated accidents analyzed for an independent spent fuel storage installation, the type of facility at which a holder of a power reactor operating license would store spent fuel in casks in accordance with 10 CFR part 72, can include tornado winds and tornado-generated missiles, a design basis earthquake, a design basis flood, an accidental cask drop, lightning effects, fire, explosions, and other incidents. This amendment does not reflect a significant change in design or fabrication of the cask. Because there are no significant design or process changes, any resulting occupational exposure or offsite dose rates from the implementation of Amendment No. 9 would remain well within the 10 CFR part 20 limits. The NRC has also determined that the design of the cask as modified by this rule would maintain confinement, shielding, and criticality control in the event of an accident. Therefore, the proposed changes will not result in any radiological or non-radiological environmental impacts that significantly differ from the environmental impacts evaluated in the environmental assessment supporting the July 18, 1990, final rule. There will be no significant change in the types or significant revisions in the amounts of any effluent released, no significant increase in the individual or cumulative radiation exposures, and no significant increase in the potential for, or consequences from, radiological accidents. The NRC documented its safety findings in the safety evaluation report. D. Alternative to the Action The alternative to this action is to deny approval of Amendment No. 9 and not issue the direct final rule. Consequently, any 10 CFR part 72 general licensee that seeks to load spent nuclear fuel into NAC International NAC-UMS Universal Storage System in accordance with the changes described in proposed Amendment No. 9 would 
                    ( print page 35861)
                    have to request an exemption from the requirements of §§ 72.212 and 72.214. Under this alternative, interested licensees would have to prepare, and the NRC would have to review, a separate exemption request, thereby increasing the administrative burden upon the NRC and the costs to each licensee. The environmental impacts would be the same as the proposed action. E. Alternative Use of Resources Approval of Amendment No. 9 to Certificate of Compliance No. 1015 would result in no irreversible commitment of resources. F. Agencies and Persons Contacted No agencies or persons outside the NRC were contacted in connection with the preparation of this environmental assessment. G. Finding of No Significant Impact The environmental impacts of the action have been reviewed under the requirements in the National Environmental Policy Act of 1969, as amended, and the NRC's regulations in subpart A of 10 CFR part 51. Based on the foregoing environmental assessment, the NRC concludes that this direct final rule, “List of Approved Spent Fuel Storage Casks: NAC International NAC-UMS Universal Storage System, Certificate of Compliance No. 1015, Amendment No. 9,” will not have a significant effect on the human environment. Therefore, the NRC has determined that an environmental impact statement is not necessary for this direct final rule. IX. Paperwork Reduction Act Statement This direct final rule does not contain any new or amended collections of information subject to the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 
                    *et seq.*). Existing collections of information were approved by the Office of Management and Budget, approval number 3150-0132. Public Protection Notification The NRC may not conduct or sponsor, and a person is not required to respond to, a request for information or an information collection requirement unless the requesting document displays a currently valid Office of Management and Budget control number. X. Regulatory Flexibility Certification Under the Regulatory Flexibility Act of 1980 (5 U.S.C. 605(b)), the NRC certifies that this direct final rule will not, if issued, have a significant economic impact on a substantial number of small entities. This direct final rule affects only nuclear power plant licensees and NAC International. These entities do not fall within the scope of the definition of small entities set forth in the Regulatory Flexibility Act or the size standards established by the NRC (§ 2.810). XI. Regulatory Analysis On July 18, 1990 (55 FR 29181), the NRC issued an amendment to 10 CFR part 72 to provide for the storage of spent nuclear fuel under a general license in cask designs approved by the NRC. Any nuclear power reactor licensee can use NRC-approved cask designs to store spent nuclear fuel if (1) it notifies the NRC in advance; (2) the spent fuel is stored under the conditions specified in the cask's certificate of compliance; and (3) the conditions of the general license are met. A list of NRC-approved cask designs is contained in § 72.214. On October 19, 2000 (65 FR 62581), the NRC issued an amendment to 10 CFR part 72 that approved the NAC-UMS Universal Storage System by adding it to the list of NRC-approved cask designs in § 72.214. On July 30, 2021, NAC International submitted a request to amend the NAC-UMS Universal Storage System as described in Section IV, “Discussion of Changes,” of this document. The alternative to this action is to withhold approval of Amendment No. 9, correct Amendment No. 8 in a separate action, and to require any 10 CFR part 72 general licensee seeking to load spent nuclear fuel into NAC International NAC-UMS Universal Storage System under the changes described in Amendment No. 9 to request an exemption from the requirements of §§ 72.212 and 72.214. Under this alternative, each interested 10 CFR part 72 licensee would have to prepare, and the NRC would have to review, a separate exemption request, thereby increasing the administrative burden upon the NRC and the costs to each licensee. Approval of this direct final rule is consistent with previous NRC actions. Further, as documented in the safety evaluation report and environmental assessment, this direct final rule will have no adverse effect on public health and safety or the environment. This direct final rule has no significant identifiable impact or benefit on other government agencies. Based on this regulatory analysis, the NRC concludes that the requirements of this direct final rule are commensurate with the NRC's responsibilities for public health and safety and the common defense and security. No other available alternative is believed to be as satisfactory; therefore, this action is recommended. XII. Backfitting and Issue Finality The NRC has determined that the backfit rule (§ 72.62) does not apply to this direct final rule. Therefore, a backfit analysis is not required. This direct final rule revises Certificate of Compliance No. 1015 for the NAC International NAC-UMS Universal Storage System, as currently listed in § 72.214. The revision consists of the changes in Amendment No. 9 previously described, as set forth in the revised certificate of compliance and technical specifications. Amendment No. 9 to Certificate of Compliance No. 1015 for the NAC International NAC-UMS Universal Storage System was initiated by NAC International and was not submitted in response to new NRC requirements, or an NRC request for amendment. Amendment No. 9 applies only to new casks fabricated and used under Amendment No. 9. These changes do not affect existing users of the NAC International NAC-UMS Universal Storage System, and the current Amendment No. 8 continues to be effective for existing users. While current users of this storage system may comply with the new requirements in Amendment No. 9, this would be a voluntary decision on the part of current users. For these reasons, Amendment No. 9 to Certificate of Compliance No. 1015 does not constitute backfitting under § 72.62 or § 50.109(a)(1), or otherwise represent an inconsistency with the issue finality provisions applicable to combined licenses in 10 CFR part 52. Accordingly, the NRC has not prepared a backfit analysis for this rulemaking. XIII. Congressional Review Act This direct final rule is not a rule as defined in the Congressional Review Act. XIV. Availability of Documents The documents identified in the following table are available to interested persons as indicated.
                    ( print page 35862) Document
ADAMS
                             accession No.Submittal of Request for NAC International NAC-UMS Universal Storage System, Certificate of Compliance No. 1015, Amendment No. 9 dated July 30, 2021
ML21222A017 (package)Proposed Certificate of Compliance for NAC International NAC-UMS Universal Storage System, Certificate of Compliance No. 1015, Amendment No. 9
ML21313A071Safety Evaluation Report for NAC International NAC-UMS Certificate of Compliance No. 1015, Amendment 9
ML21312A495Corrected pages B-2, B-4, and B3-2 from NAC International NAC-UMS Certificate of Compliance No. 1015, Amendment 8 Technical Specifications (Appendix B)
ML21312A499Proposed Technical Specifications (Appendix A) for NAC International NAC-UMS Certificate of Compliance No. 1015, Amendment 9
ML21312A501Proposed Technical Specifications (Appendix B) for NAC International NAC-UMS Certificate of Compliance No. 1015, Amendment 9
ML21312A500User Need Memorandum for forwarding Certificate of Compliance, Technical Specifications and Safety Evaluation Report for NAC International NAC-UMS Certificate of Compliance No. 1015, Amendment 9
ML21312A488
 The NRC may post materials related to this document, including public comments, on the Federal rulemaking website at 
                    *https://www.regulations.gov*
                     under Docket ID NRC-2022-0049. In addition, the Federal rulemaking website allows members of the public to receive alerts when changes or additions occur in a docket folder. To subscribe: (1) navigate to the docket folder (NRC-2022-0049); (2) click the “Subscribe” link; and (3) enter an email address and click on the “Subscribe” link. List of Subjects in 10 CFR Part 72 Administrative practice and procedure
Hazardous waste
Indians
Intergovernmental relations
Nuclear energy
Penalties
Radiation protection
Reporting and recordkeeping requirements
Security measures
Spent fuel
Whistleblowing
 For the reasons set out in the preamble and under the authority of the Atomic Energy Act of 1954, as amended; the Energy Reorganization Act of 1974, as amended; the Nuclear Waste Policy Act of 1982, as amended; and 5 U.S.C. 552 and 553; the NRC is adopting the following amendments to 10 CFR part 72: PART 72—LICENSING REQUIREMENTS FOR THE INDEPENDENT STORAGE OF SPENT NUCLEAR FUEL, HIGH-LEVEL RADIOACTIVE WASTE, AND REACTOR-RELATED GREATER THAN CLASS C WASTE
 1.The authority citation for part 72 continues to read as follows: Authority:
                        Atomic Energy Act of 1954, secs. 51, 53, 57, 62, 63, 65, 69, 81, 161, 182, 183, 184, 186, 187, 189, 223, 234, 274 (42 U.S.C. 2071, 2073, 2077, 2092, 2093, 2095, 2099, 2111, 2201, 2210e, 2232, 2233, 2234, 2236, 2237, 2238, 2273, 2282, 2021); Energy Reorganization Act of 1974, secs. 201, 202, 206, 211 (42 U.S.C. 5841, 5842, 5846, 5851); National Environmental Policy Act of 1969 (42 U.S.C. 4332); Nuclear Waste Policy Act of 1982, secs. 117(a), 132, 133, 134, 135, 137, 141, 145(g), 148, 218(a) (42 U.S.C. 10137(a), 10152, 10153, 10154, 10155, 10157, 10161, 10165(g), 10168, 10198(a)); 44 U.S.C. 3504 note. 2.In § 72.214, Certificate of Compliance No. 1015 is revised to read as follows: § 72.214
  
 *Certificate Number:*
                             1015. *Initial Certificate Effective Date:*
                             November 20, 2000. *Amendment Number 1 Effective Date:*
                             February 20, 2001. *Amendment Number 2 Effective Date:*
                             December 31, 2001. *Amendment Number 3 Effective Date:*
                             March 31, 2004. *Amendment Number 4 Effective Date:*
                             October 11, 2005. *Amendment Number 5 Effective Date:*
                             January 12, 2009. *Amendment Number 6 Effective Date:*
                             January 7, 2019. *Amendment Number 7 Effective Date:*
                             July 29, 2019. *Amendment Number 8 Effective Date:*
                             October 19, 2021, as corrected (ADAMS *Accession No.*
                             ML21312A499). *Amendment Number 9 Effective Date:*
                             August 29, 2022. *SAR Submitted by:*
                             NAC International, Inc. *SAR Title:*
                             Final Safety Analysis Report for the NAC-UMS Universal Storage System. *Docket Number:*
                             72-1015. *Certificate Expiration Date:*
                             November 20, 2020. *Model Number:*
                             NAC-UMS.
 Dated: June 1, 2022. For the Nuclear Regulatory Commission. Daniel H. Dorman, Executive Director for Operations.


[FR Doc. 2022-12746 Filed 6-13-22; 8:45 am] BILLING CODE 7590-01-P