USNRC Licensing Updates
USNRC MMRs
Terra Innovatum - SOLO
Project Overview
The U.S. Nuclear Regulatory Commission (NRC) is currently engaged in pre-application activities with Terra Innovatum as of January 2025. Terra Innovatum is developing its SOLO micro modular reactor design, intended to form the basis for a scalable modular energy platform from MWe to GWe-class. A SOLO unit is designed to deliver approximately 1MWe. The design features a solid heterogeneous composite moderator and is intended to accommodate both traditional zircaloy-clad low-enriched uranium (LEU) fuel or, when available, LEU+ and high-assay low-enriched uranium (HALEU) fuels. Heat removal is accomplished by helium gas which eliminates the need for water from the reactor coolant system. The reactor is intended to feature autonomous operation, on-line safeguards-by-design, and a defense-in-depth structure of radiological barriers with the intent to minimize or eliminate emergency planning zone (EPZ) requirements beyond the operational boundary.
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MEDIA & PRESS RELEASES
USNRC: SOLO Engagements
Terra Innovatum Advances U.S. NRC Licensing Process with Accelerated Regulatory Submissions for SOLO™ Reactor
Terra Innovatum progresses engagement with U.S. NRC to expedite licensing approval and commercialize its reactors by 2028
Terra Innovatum Srl (“Terra Innovatum,” or the “Company”), a developer of micro-modular nuclear reactors, and GSR III Acquisition Corp. (Nasdaq: GSRT), a publicly traded special purpose acquisition company, announced that the Company has accelerated several significant milestones in the ongoing licensing process of its SOLO™ micro-modular reactor with the U.S. Nuclear Regulatory Commission (“NRC”).
ince the beginning of 2025, Terra Innovatum has submitted key regulatory documents and met with NRC staff to rapidly advance the approval process for the SOLO micro-modular reactor. The new submitted documents are currently under legal review by the NRC for withholding proprietary information and include: Commercial Fuel Use, Environmental Report, Principle Design Criteria, Manufacturing and Transportation, Core Design, Emergency Planning Zone, Preliminary Safety Analysis Report, Safeguards.
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Terra Innovatum Advances USNRC Licensing Process for SOLO Micro-Modular Nuclear Reactor, Moving One Step Closer to Commercialization
Terra Innovatum Announces Progress with the U.S. Nuclear Regulatory Commission (USNRC); Comprehensive Design and Safety Submissions Now Under Regulatory Review
Terra Innovatum Srl ("Terra Innovatum," or the "Company"), a developer of micro-modular nuclear reactors, and GSR III Acquisition Corp. (Nasdaq:GSRT), a publicly traded special purpose acquisition company, today announced significant progress in the licensing process for the Company's SOLO Micro-Modular Reactor (SOLO MMR), which is currently under review by the U.S. Nuclear Regulatory Commission (NRC).
A key document filed, was the submission of the Principal Design Criteria (PDC) topical report for the SOLO MMR. The PDC defines the fundamental safety and design requirements that form the basis for the reactor's licensing review. Following its readiness review, the NRC accepted the report for full technical evaluation. In a formal letter dated July 30, 2025, the NRC indicated its intent to complete the review process by the end of 2025 and to issue a Safety Evaluation (SE) of the PDC report by April 2026.
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SOLO™'s Non-Proliferation Approach Aligns with U.S. NRC's Proposed Licensing Framework Criteria for Low Risk, Proliferation-Resistant Micro Modular Reactors
Terra Innovatum SOLO(TM) Design Aligns with U.S. NRC's Recent Considerations of Streamlined Licensing Path for Proliferation-Resistant Micro-Modular Reactors
Terra Innovatum Srl ("Terra Innovatum," or the "Company"), a developer of micro-modular nuclear reactors, and GSR III Acquisition Corp. (NASDAQ:GSRT), a publicly traded special purpose acquisition company, today issued the following statement in support of the U.S. Nuclear Regulatory Commission's ("NRC") long-term vision for micro-modular reactor licensing, following the NRC's public meetings on July 17-18, 2025:
"We are encouraged by the NRC's recent public dialogue and their proposed rulemaking regarding future streamlined licensing for micro-modular and other low risk reactors. In particular, we support the NRC's introduction of limits on the type and quantity of proliferation materials - or ‘Special Nuclear Materials' (SNM) such as uranium or plutonium - in its proposed fundamental entry criteria, which further validates and aligns with SOLOTM's Safeguards by Design approach.
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Terra Innovatum Submits Engagement Plan to the United States Nuclear Regulatory Commission (USNRC) for SOLO Micro Modular Reactor Marking a Fundamental Milestone in 2025
Propelling Nuclear Innovation: Terra Innovatum, a Leader in the Clean Energy Revolution, Setting New Industry Benchmarks with SOLO Micro-Modular Reactor (SMR)
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MEDIA & PRESS RELEASES
FOAK: Site & Deployment
GSR III Acquisition Corp. and Terra Innovatum Announce MOU for First-of-a-Kind SOLO Deployment Site at Rock City Development’s Industrial Park, with Future Option to Deploy 50 SOLO Reactors On-Site for Commercial Expansion
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Partnership Agreement Provides Site for First-Of-A-Kind (FOAK) SOLO™ Nuclear Micro Modular Reactor (1 MWe)
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Agreement Includes Option to Purchase 50 SOLO™ Reactors to Meet Demand for Reliable Behind-the-Meter Energy Supplies (50 MWe)
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SOLO™ to Deliver Clean, Stable Energy Across Rock City’s Private and Public Sector Clients
GSR III Acquisition Corp. (Nasdaq: GSRT), a publicly traded special purpose acquisition company, and Terra Innovatum Srl (“Terra Innovatum,” or the “Company”), a developer of micro-modular nuclear reactors, announced today that Terra Innovatum signed a Memorandum of Understanding (“MOU”) with Rock City Admiral Parkway Development (“Rock City”), a six-million square-foot industrial park in Illinois, to host the first deployment site for the SOLO™ micro-modular reactor. This strategic agreement grants Terra Innovatum dedicated use of Rock City’s land for the licensing, testing, and construction of the Company’s first-of-a-kind (“FOAK”) SOLO™ reactor. Subject to customary approvals, Terra Innovatum will supply Rock City’s industrial, logistics, food distribution and government clients with clean and reliable power from the FOAK SOLO™ with an option to subsequently deploy 50 reactors on site, delivering up to 50 MWe for commercial use.
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