{"abstract":"The U.S. Nuclear Regulatory Commission (NRC) has approved the Kairos Power LLC (Kairos) request to amend Construction Permit No. CPTR-6 for the Hermes test reactor facility in Oak Ridge, Tennessee. The approved amendment extends the latest date for completion of the construction of the Hermes test reactor facility from December 31, 2026, to April 30, 2029.","action":"Order; issuance.","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/2026/05/18/2026-09880.html","cfr_references":[],"citation":"91 FR 28629","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"The Order was issued on May 13, 2026.","disposition_notes":null,"docket_ids":["Docket No. 50-7513","NRC-2021-0193"],"dockets":[{"supporting_documents":[{"title":"Draft NUREG-2263 \"Environmental Impact Statement for the Construction Permit for the Kairos Hermes Test Reactor\"","document_id":"NRC-2021-0193-0012"}],"agency_name":"NRC","documents":[{"comment_count":null,"comment_start_date":null,"updated_at":"2026-05-18T10:59:25.067-04:00","comment_url":"https://www.regulations.gov/commenton/NRC-2021-0193-0024","allow_late_comments":false,"id":"NRC-2021-0193-0024","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"NRC-2021-0193","title":"Kairos Power, LLC"}],"document_number":"2026-09880","effective_on":null,"end_page":28630,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/05/18/2026-09880.xml","html_url":"https://www.federalregister.gov/documents/2026/05/18/2026-09880/in-the-matter-of-kairos-power-llc-hermes-test-reactor-extension-of-latest-date-for-completion-of","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-09880?publication_date=2026-05-18","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-05-18/2026-09880/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":107,"last_updated":"2026-06-15 20:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-05-18/pdf/2026-09880.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-09880.pdf?1778849121","publication_date":"2026-05-18","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/05/18/2026-09880.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Draft NUREG-2263 \"Environmental Impact Statement for the Construction Permit for the Kairos Hermes Test Reactor\"","document_id":"NRC-2021-0193-0012"}],"comments_count":0,"agency_id":"NRC","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=NRC-2021-0193","supporting_documents_count":1,"docket_id":"NRC-2021-0193","document_id":"NRC-2021-0193-0024","regulation_id_number":null,"title":"Kairos Power, LLC","checked_regulationsdotgov_at":"2026-05-19T12:55:06Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":28629,"subtype":null,"title":"In the Matter of Kairos Power LLC; Hermes Test Reactor; Extension of Latest Date for Completion of Construction","toc_doc":"Kairos Power LLC, Hermes Test Reactor","toc_subject":"Extension of Latest Date for Completion of Construction","topics":[],"type":"Notice","volume":91}