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ZiaCore Microreactor Achieves Criticality in High-Temperature Zero-Power Experiment

Los Alamos National Laboratory announced on July 30 that its ZiaCore microreactor design has completed a high-temperature zero-power criticality proof-of-principle experiment at the National Criticality Experiments Research Center (NCERC) in Nevada, successfully achieving initial criticality. ZiaCore is an advanced nuclear energy microreactor design that uses low-enriched uranium dioxide fuel. The experiment lasted approximately four weeks from April to May this year, advancing the ZiaCore system to zero-power criticality under high-temperature conditions. According to the reactor design and verification process, zero-power criticality experiments can be used to validate the effectiveness of reactor physics designs, providing key benchmark data for subsequent engineering development.

2026-07-31

South Korea launches design of 250 MWe sodium-cooled fast reactor Helios

The Korea Atomic Energy Research Institute (KAERI), in collaboration with Hyundai Engineering & Construction and KEPCO E&C, has initiated the design of the next-generation sodium-cooled fast reactor Helios. The reactor is planned to have an electrical output of 250 MWe, based on the existing 100 MWe-class sodium-cooled fast reactor Salus-100 design, targeting large-scale power consumption applications such as AI data centers and industrial parks. Lee Je-hwan, head of the Fourth Generation Reactor Technology Development Department at KAERI, stated that future demand for large-scale carbon-free electricity around AI data centers and industrial parks...

2026-07-30

Ontario Invests Additional $4.6 Million in McMaster Nuclear Reactor to Expand Medical Isotope Production Capacity

The Government of Ontario, Canada, recently announced an additional investment of $4.6 million in the McMaster Nuclear Reactor to expand the production capacity of life-saving medical isotopes, supporting more cancer patients in accessing the critical radioisotopes needed for diagnosis and treatment. From left to right: Josip Zikic, Chief Nuclear Officer at McMaster University; Nolan Quinn, Minister of Colleges and Universities, Research Excellence and Security; Stephen Lecce, Minister of Energy and Mining; Susan Tighe, President and Vice-Chancellor of McMaster University; and Victor Fedeli, Minister of Economic Development, Job Creation and Trade. (Georgia Kirkos/McMaster University) This investment builds on a previous $18 million...

2026-07-30

Trump to meet with heads of advanced nuclear reactor companies; projects from four firms reaching critical stage.

U.S. President Donald Trump is scheduled to meet with executives from several advanced nuclear reactor companies at the White House on July 24 (local time) to highlight key technological breakthroughs.According to White House officials, the CEOs of Antare

2026-07-27