In a significant step towards the future of nuclear energy, TRISO-X and Oak Ridge National Laboratory (ORNL) have extended their partnership, aiming to revolutionize the production of next-generation nuclear reactor fuel. This collaboration, which began in 2016, has now been given a 30-month boost, allowing for further advancements in chemical engineering methods for manufacturing tri-structural isotropic (TRISO) nuclear fuel.
The primary focus of this extended partnership is to transition particle fuel production from the laboratory to automated commercial assembly lines. TRISO fuel, with its sub-millimeter uranium oxycarbide kernels enriched to HALEU levels, is at the heart of this endeavor. By enriching uranium to contain between 5% and 20% uranium-235, TRISO-X aims to enhance America's nuclear fuel supply chain and support the deployment of cutting-edge reactors.
Moving Beyond the Laboratory
One of the key challenges is to ensure consistent fuel coatings across batches. TRISO-X, with the support of ORNL, is working on improving the uniformity of these coatings, a critical factor in the reliability and performance of the fuel. Additionally, the team is striving to increase fuel yield per production cycle and enhance non-destructive inspection techniques, ensuring efficient and effective manufacturing processes.
Furthermore, the collaboration is exploring alternative fuel shapes, such as cylindrical compacts and spherical graphite pebbles, to accommodate different reactor core designs. This flexibility in fuel design is a significant step towards adapting nuclear energy to various applications and reactor types.
Regulatory and Technical Milestones
TRISO-X has already achieved notable milestones using its pilot line at ORNL. The Nuclear Regulatory Commission's Part 70 license, granted to the facility, permits the handling and processing of HALEU material, a crucial step in the commercialization of this advanced fuel.
Fuel samples produced at the pilot plant have undergone rigorous testing at Idaho National Laboratory's Advanced Test Reactor. These tests, involving high-flux neutron irradiation, have verified the integrity of the ceramic layers under real reactor conditions, a critical safety aspect of TRISO fuel.
Powering the Next Generation
The advanced TRISO fuel developed by TRISO-X and ORNL will be the driving force behind next-generation reactors, such as X-energy's Xe-100 high-temperature gas-cooled reactor. The Xe-100 design, which utilizes helium gas as a coolant and graphite pebbles containing TRISO particles, offers enhanced safety features and eliminates the need for large secondary containment buildings.
Expanding Horizons
In a separate development, X-energy, the parent company of TRISO-X, has expanded its footprint by acquiring approximately 70 acres of land adjacent to TRISO-X's current site in Oak Ridge's Horizon Center Industrial Park. This expansion will accommodate utility lines, equipment staging, and material storage, providing the necessary infrastructure for the construction of two additional facilities: the TX-2 commercial factory and the TX-L dedicated research facility, both of which will further bolster TRISO fuel production and research.
A Collaborative Vision
As ORNL Director Stephen Streiffer aptly concluded, "By combining ORNL's deep expertise in nuclear materials and fuel development with TRISO-X's manufacturing capabilities, we are advancing TRISO fuel production in ways that can support the next generation of nuclear energy." This collaboration showcases the power of industry-academic partnerships in driving innovation and shaping the future of energy.
In my opinion, this extended partnership between TRISO-X and ORNL is a testament to the potential of nuclear energy to provide a safe, reliable, and sustainable energy source. With their combined efforts, we can expect significant advancements in nuclear fuel technology, paving the way for a cleaner and more efficient energy future.
