Microreactor Criticality Milestones Fuel Nuclear Renaissance

Nuclear Energy Content Hub Microreactor Criticality Milestones Fuel Nuclear Renaissance Elle Caruso Fitzgerald August 28, 2026 Westinghouse, which is 49% owned by Cameco Corp. (CCJ) , recently achieved initial criticality for its eVinci microreactor this month, marking a notable milestone for advanced nuclear deployment. Key Takeaways Westinghouse completed zero-power criticality testing for its 5 MWe eVinci microreactor at the Nevada National Security Site alongside DOE national laboratories. Advanced nuclear developers continue pushing reactor designs through core iteration beyond the federal government’s July 4 criticality target. The Range Nuclear Renaissance ETF (NUKZ) captures pure-play exposure across next-generation reactor design and commercialization. Reactor Iteration Accelerates Beyond Initial Goals Westinghouse conducted the test in partnership with Los Alamos National Laboratory and Idaho National Laboratory. It validates core design assumptions and modeling for Westinghouse’s heat pipe-cooled microreactor. The milestone follows Oklo’s (OKLO) recent regulatory and operational progress on its radioisotope and fast-reactor designs, underscoring accelerating core reactor progress. While the broader industry celebrated the July 4 criticality goal set by executive mandates, private r eactor design iteration and development remain robust. Advanced reactor developers are partnering with national labs. These collaborations build the foundation for scalable commercial rollouts to satisfy surging data center and industrial power demand. Investing in Advanced Microreactor Deployment via NUKZ For investors tracking the nuclear energy renaissance, nuclear deployment represents a long-term thematic growth driver. Oklo and Cameco are holdings of the Range Nuclear Renaissance ETF (NUKZ) , which provides targeted exposure across the entire nuclear value chain. NUKZ delivers exposure to nuclear segments including advanced reactor developers, utilities, construction services, and fuel providers. As regulatory frameworks modernize and utility-scale microreactors move toward commercial deployment, index-based strategies like NUKZ allow advisors to capture broad supply-chain upside while mitigating single-company regulatory risk. Looking for nuclear insights in your inbox? Subscribe here to keep a pulse on nuclear investing through our weekly research . For more news, information, and analysis, visit the Nuclear Energy Content Hub . vettafi.com is owned by VettaFi LLC (“VettaFi”). VettaFi is the index provider for NUKZ, for which it receives an index licensing fee. However, NUKZ is not issued, sponsored, endorsed, or sold by VettaFi. VettaFi has no obligation or liability related to the issuance, administration, marketing, or trading of NUKZ. RELATED TOPICS CCJ microreactors nuclear energy Content Hub Nuclear Renaissance NUKZ OKLO Range Funds Earn free CE credits and discover new strategies