GNF’s new nuclear fuel uses an 11x11 fuel matrix and cutting-edge components to improve uranium efficiency.
Global Nuclear Fuel , a GE Vernova-led alliance with Hitachi, has announced the launch of its next-generation nuclear fuel product, GNF4. Designed for boiling water reactor units, the new fuel aims to provide plant operators with lower fuel costs per megawatt-hour through enhanced performance and reliability.
“The first lead use assemblies of GNF4 are contracted for deployment in 2026 and full reload quantities are expected to be available in 2030,” said the company in a press release.The fuel is currently being fabricated at GNF’s state-of-the-art facility in Wilmington, North Carolina.Increasing heat-generating surface areaGNF4 builds upon the operational success of its predecessors, GNF2 and GNF3, and incorporates two key advanced components recently licensed by the US Nuclear Regulatory Commission . The new design features an 11×11 fuel matrix, which increases the heat-generating surface area for more efficient use of uranium and provides industry-leading fuel mass per bundle.“GNF4 is engineered to provide plant operators with lower fuel costs per megawatt hour through increased performance and reliability,” said Craig Ranson, installed base chief executive officer at GE Vernova Hitachi Nuclear Energy.At the core of GNF4’s advanced design are two NRC-approved components. The first is Ziron Cladding, which was developed to offer superior corrosion resistance compared to the Zircaloy 2 cladding used in over 175,000 GNF fuel assemblies worldwide. This enhanced cladding improves fuel safety and reliability by reducing hydrogen pickup.The second key component is the use of Aluminosilicate Doped Uranium Dioxide Pellets, which provide an additional layer of reliability and offer accident-tolerant protection against pellet-clad interaction .Utilizing proven technologiesIn addition to these innovations, GNF4 will also leverage GNF’s proven, high-performing technologies. The fuel assembly will use NSF Channel Material, a distortion-resistant zirconium alloy designed to reduce fuel channel distortion in BWRs. It will also include the Defender+ Debris Filter, GNF’s most proven debris filter, with over 20,000 bundles deployed across all operating reactor types and a historically low frequency of debris-related incidents.“Our engineering and supply chain teams are leveraging their BWR expertise to introduce this next-generation fuel,” concluded Ranson.The development of GNF4 represents a significant step in the company’s evolution of fuel design, from its original 7×7 configuration to the current 11×11 matrix, all aimed at delivering safety, reliability, and cost-effective uranium utilization for the nuclear power industry.Increasing global effortLately, work on the next-gen nuclear fuel system has increased. Last week, US-based Standard Nuclear Inc. and French nuclear giant Framatome joined hands to supply commercial-scale quantities of Tri-structural Isotropic fuel for the next generation of nuclear reactors.In another development, the Fuel Division of Rosatom, Russia’s state nuclear corporation, manufactured and accepted a new type of nuclear fuel assembly, i.e., OS-5.The assembly is designed for use in fourth-generation fast neutron reactors and features mixed nitride uranium-plutonium fuel that incorporates a liquid metal sublayer.
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