Core Technology: Liquid-Fueled Molten Salt Reactors (LF-MSR)

Natura’s primary focus is the development of next-generation (Gen IV) Small Modular Reactors (SMRs) using liquid-fueled molten salt technology. This architecture deviates fundamentally from conventional nuclear designs:

• Reactor Core and Fuel: Instead of utilizing solid uranium fuel rods, Natura's design dissolves fissile Uranium Tetrafluoride ($UF_4$) material directly into a molten salt mixture. As this liquid fuel moves through the reactor core, fission reactions occur, generating temperatures exceeding 600°C.
• Low-Pressure Cooling: By utilizing molten salt as both the fuel carrier and the primary coolant, the system operates at the pressure of standard household pipes. This eliminates the need for massive, high-pressure containment domes required by conventional pressurized water reactors.
• Walk-Away Safety: Because the fuel is in a liquid state, the design is inherently "walk-away safe". If a critical power loss or malfunction occurs, a freeze plug melts, and the liquid fuel salt drains under gravity into a specialized drain tank beneath the reactor core. In this tank, the geometric configuration prevents the fission process from continuing, allowing the salt to naturally cool and solidify into a stable solid state without human intervention.

Key Projects and Milestones

Natura Resources has transitioned from theoretical design to physical testing and regulatory approvals, positioning itself as a pioneer in the commercialization of Gen IV nuclear reactors in the United States.

1. The MSR-1 (1-Megawatt Thermal Research Reactor)

The MSR-1 is Natura's flagship demonstration reactor, designed to test the feasibility of the company’s liquid-fuel MSR architecture. * Regulatory Milestone: In September 2024, the U.S. Nuclear Regulatory Commission (NRC) issued a construction permit for the MSR-1 at Abilene Christian University (ACU). This marked the first liquid-fueled reactor design to receive a construction permit from the NRC in U.S. history and the first university research reactor approved in over 30 years. * Target Criticality: The facility construction is complete, and Natura is actively pursuing operating licenses. Utilizing an allocation of FLiBE coolant salt (enriched lithium-7) secured from the U.S. Department of Energy (DOE) in early 2026, the reactor is on track to achieve criticality in 2026.

2. The MSTS (Molten Salt Test System)

To validate the reliability of its systems, Natura developed and operates a 50-gallon flowing loop simulation system known as the Molten Salt Test System (MSTS). In early 2026, the company completed 1,000 hours of continuous operations. This milestone validated their ability to circulate corrosive molten salt mixtures continuously, gather real-world material integrity data, and test advanced monitoring sensors.

3. The MSR-100 (100-Megawatt Commercial Reactor)

Natura is designing the MSR-100 to serve as its commercial-scale SMR deployment. This modular design targets utility grids and heavy industries, offering cost-competitive, carbon-free baseload power. Commercial deployment of the MSR-100 is projected for 2029.

Products and Services Applications

Natura Resources does not just generate electricity; its high-temperature reactor technology is engineered to offer three primary "products" or service outputs:

1. 24/7 Grid Power & Industrial Heat Decarbonization

Wind and solar power face intermittency challenges, whereas Natura’s SMRs offer continuous baseload power. Because the reactors operate at temperatures over 600°C, they provide high-quality process heat. This heat can be sold directly or utilized in industrial settings for: * Hydrogen production * Clean electricity generation * District heating and metal refining * Powering energy-dense data centers experiencing rapid expansion

2. Large-Scale Produced Water Desalination

A primary commercial focus for Natura—particularly in the Permian Basin of Texas—is utilizing nuclear heat for thermal desalination of oilfield waste. Natura has signed agreements with NGL Water Solutions Permian LLC (a subsidiary of NGL Energy Partners LP) to integrate the MSR-100 reactor with thermal desalination systems. This service converts hazardous "produced water" from oil and gas operations into purified water for beneficial agricultural or industrial reuse, solving a critical waste management issue in arid regions.

3. Medical Isotope Harvesting

When uranium fissions in solid-fuel reactors, valuable medical byproducts are trapped inside solid metal rods and are inaccessible. Because Natura's fuel is liquid, medically vital fission products—such as Molybdenum-99 (Mo-99), used daily in cancer diagnostics and medical imaging—exist in the liquid and gas phases of the loop. Natura's systems are designed with extraction technology to harvest these isotopes directly during operation, helping to alleviate critical global shortages of medical radioisotopes.

Research Partnerships and Collaborations

Rather than operating in isolation, Natura Resources relies on a robust model of public-private partnerships to distribute development costs and leverage academic expertise:

The Natura Resources Research Alliance (NRRA)

Established and funded by Natura Resources, the NRRA is a strategic research consortium consisting of four major research universities: * Abilene Christian University (ACU): Serves as the home of the NEXT Lab (Nuclear Energy eXperimental Testing Lab) and the physical site for the MSR-1 reactor deployment. * The University of Texas at Austin (UT Austin): Supports computational efforts, utilizing university high-performance supercomputing infrastructure to run safety analyses and reactor physics modeling. * Texas A&M University: Focuses on thermal-fluid management, design elements, and fuel characterization. * The Georgia Institute of Technology (Georgia Tech): Engages faculty and nuclear engineering students in physical modeling and real-world reactor design validation.

Federal Partnerships

To ensure a steady fuel supply and validate engineering metrics, Natura coordinates with federal entities: * U.S. Department of Energy (DOE): Contracted under Other Transactional Agreements (OTA) to establish frameworks for fuel supply and pilot programs. The DOE has committed to supplying High-Assay Low-Enriched Uranium (HALEU) to fuel the MSR-1. * Quadrant Nuclear Industries (QNI): Natura secured a fuel-supply agreement with QNI to guarantee a long-term supply pipeline of HALEU for subsequent commercial reactor systems.