{"abstract":"The U.S. Nuclear Regulatory Commission (NRC) is proposing to amend its regulations to augment the existing byproduct material framework to be inclusive of fusion machines. The NRC is proposing requirements that are technology-inclusive to accommodate the wide variety of anticipated fusion machine designs across the National Materials Program. The NRC is also issuing for comment draft guidance for the implementation of this proposed rule, entitled NUREG-1556, Volume 22, \"Consolidated Guidance About Materials Licenses: Program- Specific Guidance About Fusion Machine Licenses.\" The NRC will conduct at least one public meeting to promote full understanding of the proposed rule and to facilitate public comments. We seek comment on all aspects of this proposed rule.","action":"Proposed rule; guidance; and request for comment.","agencies":[{"raw_name":"NUCLEAR REGULATORY COMMISSION","name":"Nuclear Regulatory Commission","id":383,"url":"https://www.federalregister.gov/agencies/nuclear-regulatory-commission","json_url":"https://www.federalregister.gov/api/v1/agencies/383","parent_id":null,"slug":"nuclear-regulatory-commission"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2026/02/26/2026-03865.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"20","title":10},{"chapter":null,"citation_url":null,"part":"30","title":10},{"chapter":null,"citation_url":null,"part":"37","title":10},{"chapter":null,"citation_url":null,"part":"50","title":10},{"chapter":null,"citation_url":null,"part":"51","title":10},{"chapter":null,"citation_url":null,"part":"72","title":10},{"chapter":null,"citation_url":null,"part":"110","title":10},{"chapter":null,"citation_url":null,"part":"150","title":10},{"chapter":null,"citation_url":null,"part":"170","title":10},{"chapter":null,"citation_url":null,"part":"171","title":10}],"citation":"91 FR 9476","comment_url":null,"comments_close_on":"2026-05-27","correction_of":null,"corrections":[],"dates":"Submit comments by May 27, 2026. Comments received after this date will be considered if it is practical to do so, but the Commission is able to ensure consideration of only comments received before this date.","disposition_notes":null,"docket_ids":["NRC-2023-0071"],"dockets":[{"supporting_documents":[{"title":"March 25 2026 Public Meeting Presentation - Proposed Rule: Regulatory Framework for Fusion Machines","document_id":"NRC-2023-0071-0069"},{"title":"NRC Response to Helion Letter dated February 3, 2025 from J. 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Lubinski dated August 1, 2024 - Preliminary Rulemaking Process for a Regulatory Framework for Fusion Systems","document_id":"NRC-2023-0071-0037"},{"title":"NRC Response to TAE Letter dated May 22, 2024 - Preliminary Rulemaking Process for a Regulatory Framework for Fusion Systems – June 2024","document_id":"NRC-2023-0071-0035"},{"title":"NRC Response to FIA Letter dated May 22, 2024 - Preliminary Rulemaking Process for a Regulatory Framework for Fusion Systems – June 2024","document_id":"NRC-2023-0071-0034"},{"title":"Letter from Commonwealth Fusion Systems (CFS) to J. Lubinski dated May 21, 2024 - Preliminary Rulemaking Process for a Regulatory Framework for Fusion Systems","document_id":"NRC-2023-0071-0033"},{"title":"Letter from TAE Technologies (TAE) to J. Lubinski dated May 22, 2024 - Preliminary Rulemaking Process for a Regulatory Framework for Fusion Systems","document_id":"NRC-2023-0071-0031"}],"agency_name":"NRC","documents":[{"comment_count":33,"comment_start_date":"2026-02-26","updated_at":"2026-05-28T00:04:24.901-04:00","comment_url":"https://www.regulations.gov/commenton/NRC-2023-0071-0056","allow_late_comments":false,"id":"NRC-2023-0071-0056","comment_end_date":"2026-05-28","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":58,"id":"NRC-2023-0071","title":"Regulatory Framework for Fusion Machines (formerly Regulatory Framework for Fusion Systems)"}],"document_number":"2026-03865","effective_on":null,"end_page":9498,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/02/26/2026-03865.xml","html_url":"https://www.federalregister.gov/documents/2026/02/26/2026-03865/regulatory-framework-for-fusion-machines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-03865?publication_date=2026-02-26","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-02-26/2026-03865/mods.xml","not_received_for_publication":null,"page_length":23,"page_views":{"count":4658,"last_updated":"2026-05-28 12:15:07 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-02-26/pdf/2026-03865.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-03865.pdf?1772027117","publication_date":"2026-02-26","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/02/26/2026-03865.txt","regulation_id_number_info":{"3150-AL00":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/3150-AL00/regulatory-framework-for-fusion-machines-nrc-2023-0071-","title":"Regulatory Framework for Fusion Machines [NRC-2023-0071]","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&RIN=3150-AL00&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["3150-AL00"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"March 25 2026 Public Meeting Presentation - Proposed Rule: Regulatory Framework for Fusion Machines","document_id":"NRC-2023-0071-0069"},{"title":"NRC Response to Helion Letter dated February 3, 2025 from J. 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Lubinski dated May 22, 2024 - Preliminary Rulemaking Process for a Regulatory Framework for Fusion Systems","document_id":"NRC-2023-0071-0031"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/3150-AL00/regulatory-framework-for-fusion-machines-nrc-2023-0071-","title":"Regulatory Framework for Fusion Machines [NRC-2023-0071]"},"comments_count":33,"agency_id":"NRC","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=NRC-2023-0071","supporting_documents_count":58,"docket_id":"NRC-2023-0071","document_id":"NRC-2023-0071-0056","regulation_id_number":"3150-AL00","title":"Regulatory Framework for Fusion Machines (formerly Regulatory Framework for Fusion Systems)","checked_regulationsdotgov_at":"2026-05-28T04:04:24Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":9476,"subtype":null,"title":"Regulatory Framework for Fusion Machines","toc_doc":"Regulatory Framework for Fusion Machines","toc_subject":null,"topics":["Administrative practice and procedure","Antitrust","Classified information","Education","Environmental impact statements","Exports","Fire prevention","Government contracts","Hazardous materials transportation","Hazardous waste","Imports","Indians","Intergovernmental relations","Nuclear energy","Nuclear materials","Nuclear power plants and reactors","Occupational safety and health","Packaging and containers","Penalties","Radiation protection","Radioactive materials","Reporting and recordkeeping requirements","Scientific equipment","Security measures","Waste treatment and disposal","Whistleblowing"],"type":"Proposed Rule","volume":91}