DOE confirms federal readiness reviews of the four pilot reactors, Ward 250 among them, ending in a final report to the startup authority; no report was found in public records as of Sept. 30, 2026

DOE's Office of Environmental Management (EM) wrote on 14 July 2026 that 17 EM team members 'took part in DOE’s readiness review process for facility startup' and transition to operations for the four Reactor Pilot Program reactors that went critical by 4 July, naming Valar Atomics' Ward 250. It says readiness review team members reviewed documents, took part in onsite interviews and performance demonstrations, and 'prepared the final report with recommendation to the startup authorization authority' for approval to proceed with nuclear operations. They also reviewed corrective action plans and closure documents answering 'DOE-identified pre- and post-start findings'. The article does not say which reactor any finding concerned, or give each reactor's report or recommendation separately. It also says EM staff reviewed contractor safety submittals from preliminary to final design before recommendation to the safety basis approval authority. Separately, the DOE Nuclear Criticality Safety Program manager wrote in the program's Summer 2026 newsletter that NNSA's NA-ESH office 'has been helping out performing the federal readiness reviews for these reactors'. This is DOE's own confirmation of the kind of review Valar described to the state lab board in May. No copy of the readiness report, its findings or the startup authorization was found in public records as of 30 September 2026 (safe-007).

• EM Specialists Help DOE Achieve Criticality Milestones for Advanced Reactors (U.S. Department of Energy, Office of Environmental Management, 2026-07-14) primary government “prepared the final report with recommendation to the startup authorization authority”
• EM Specialists Help DOE Achieve Criticality Milestones for Advanced Reactors (U.S. Department of Energy, Office of Environmental Management, 2026-07-14) primary government “took part in DOE’s readiness review process for facility startup”
• NCSP Newsletter, Summer 2026: A Message from the NCSP Manager (U.S. DOE Nuclear Criticality Safety Program (hosted by LLNL), 2026-08-10) primary government “has been helping out performing the federal readiness reviews for these reactors”