{"abstract":"The U.S. Nuclear Regulatory Commission (NRC) is proposing to revise its regulations to facilitate direct leveraging of prior U.S. Department of Energy or Department of War authorizations of demonstration reactors into the NRC's licensing reviews of commercial reactor facility applications that reference those designs. This rulemaking would improve NRC licensing review efficiency, where applicable, by explicitly establishing by regulation an additional means for reactor applicants to demonstrate the safety functions of their reactor designs, and thus, would contribute to the safe and secure use and deployment of civilian nuclear energy technologies.","action":"Proposed rule; public meeting; 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/2026/04/02/2026-06414.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"50","title":10},{"chapter":null,"citation_url":null,"part":"53","title":10}],"citation":"91 FR 16584","comment_url":null,"comments_close_on":"2026-05-04","correction_of":null,"corrections":[],"dates":"Submit comments by May 4, 2026.","disposition_notes":null,"docket_ids":["NRC-2025-1503"],"dockets":[{"supporting_documents":[{"title":"Response Email from Jon Greives to Barry Quigley","document_id":"NRC-2025-1503-0141"},{"title":"Letter from Barry Quigley","document_id":"NRC-2025-1503-0140"},{"title":"Response Email from Jonathan Greives to Adam Stein and Nicholas McMurray re Response to Your Request for Extension of Comment Period","document_id":"NRC-2025-1503-0076"},{"title":"LTR-26-0078 Response Email from Jonathan Greives to Patrick Mulligan re Response to Your Request for Extension of Comment Period","document_id":"NRC-2025-1503-0071"},{"title":"LTR-26-0078 Letter from Patrick Mulligan, Chairperson, Conference of Radiation Control Program Directors, Inc.","document_id":"NRC-2025-1503-0070"},{"title":"Unofficial Redline Rule Language for the Proposed Rule - NRC Reviews of Reactor Designs Previously Authorized by U.S","document_id":"NRC-2025-1503-0002"}],"agency_name":"NRC","documents":[{"comment_count":736,"comment_start_date":"2026-04-02","updated_at":"2026-05-12T09:57:08.367-04:00","comment_url":"https://www.regulations.gov/commenton/NRC-2025-1503-0001","allow_late_comments":false,"id":"NRC-2025-1503-0001","comment_end_date":"2026-05-05","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":6,"id":"NRC-2025-1503","title":"NRC Reviews of Reactor Designs Previously Authorized by U.S. Department of Energy or Department of War (formerly titled Streamlined Reviews of Proven Reactor Designs)"}],"document_number":"2026-06414","effective_on":null,"end_page":16588,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/04/02/2026-06414.xml","html_url":"https://www.federalregister.gov/documents/2026/04/02/2026-06414/nrc-reviews-of-reactor-designs-previously-authorized-by-us-department-of-energy-or-department-of-war","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-06414?publication_date=2026-04-02","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-04-02/2026-06414/mods.xml","not_received_for_publication":null,"page_length":5,"page_views":{"count":2835,"last_updated":"2026-06-25 00:15:02 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-04-02/pdf/2026-06414.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-06414.pdf?1775047518","publication_date":"2026-04-02","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/04/02/2026-06414.txt","regulation_id_number_info":{"3150-AL60":null},"regulation_id_numbers":["3150-AL60"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Response Email from Jon Greives to Barry Quigley","document_id":"NRC-2025-1503-0141"},{"title":"Letter from Barry Quigley","document_id":"NRC-2025-1503-0140"},{"title":"Response Email from Jonathan Greives to Adam Stein and Nicholas McMurray re Response to Your Request for Extension of Comment Period","document_id":"NRC-2025-1503-0076"},{"title":"LTR-26-0078 Response Email from Jonathan Greives to Patrick Mulligan re Response to Your Request for Extension of Comment Period","document_id":"NRC-2025-1503-0071"},{"title":"LTR-26-0078 Letter from Patrick Mulligan, Chairperson, Conference of Radiation Control Program Directors, Inc.","document_id":"NRC-2025-1503-0070"},{"title":"Unofficial Redline Rule Language for the Proposed Rule - NRC Reviews of Reactor Designs Previously Authorized by U.S","document_id":"NRC-2025-1503-0002"}],"comments_count":736,"agency_id":"NRC","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=NRC-2025-1503","supporting_documents_count":6,"docket_id":"NRC-2025-1503","document_id":"NRC-2025-1503-0001","regulation_id_number":"3150-AL60","title":"NRC Reviews of Reactor Designs Previously Authorized by U.S. Department of Energy or Department of War (formerly titled Streamlined Reviews of Proven Reactor Designs)","checked_regulationsdotgov_at":"2026-05-13T04:55:06Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":16584,"subtype":null,"title":"NRC Reviews of Reactor Designs Previously Authorized by U.S. Department of Energy or Department of War","toc_doc":"Reviews of Reactor Designs Previously Authorized by U.S. Department of Energy or Department of War","toc_subject":null,"topics":["Administrative practice and procedure","Antitrust","Classified information","Education","Fees","Fire prevention","Intergovernmental relations","Nuclear power plants and reactors","Penalties","Radiation protection","Reporting and recordkeeping requirements","Whistleblowing"],"type":"Proposed Rule","volume":91}