US reviewing SOLO nuclear reactor design and safety submission

Terra Innovatum is advancing the development and regulatory approval of its SOLO micro-modular nuclear reactor, designed to deliver approximately one megawatt of electricity per unit. The company has partnered with ATB Riva Calzoni, a global nuclear component manufacturer, to scale production and accelerate commercialization. The SOLO reactor aims to form a scalable modular energy platform ranging from megawatt to gigawatt-class capacities. Terra Innovatum submitted key regulatory documents to the U.S. Nuclear Regulatory Commission (NRC), including the Principal Design Criteria (PDC) report, which outlines fundamental safety and design requirements. The NRC is currently reviewing the design, with an expected completion of the review by the end of 2025 and issuance of a Safety Evaluation by April 2026. The SOLO reactor features a solid heterogeneous composite moderator and is compatible with various fuels, including traditional low-enriched uranium (LEU), LEU+, and high-assay low-enriched uranium (HALEU). It uses helium gas