Deep Fission has secured a 25-year master energy purchase agreement with the Great Plains Development Authority for a planned commercial nuclear facility in Parsons, Kansas, according to the company's Oct. 20 announcement. The initial phase targets 150 megawatts of capacity, with commercial operation slated for September 2028, and potential expansion to 2 gigawatts by 2031. The agreement converts a December 2025 letter of intent into a definitive contract for a commercial project at the site where the company is developing its U.S. Department of Energy pilot.
The Great Plains Development Authority, which owns the industrial park, would purchase electricity generated by Deep Fission to serve park tenants, up to the contracted capacity. However, the agreement includes no minimum purchase obligation, and the authority may assign its purchase obligations to qualifying tenants. That means the contract links a planned power supply with industrial-park customers but doesn't guarantee a minimum volume of electricity sales. The industrial park spans more than 14,000 acres and has existing rail access and utilities, though the announcement didn't identify the commercial project's final site plan or surface facilities. A 150-megawatt plant running continuously would produce enough electricity over a year to equal the annual consumption of roughly 122,000 U.S. homes, based on the U.S. Energy Information Administration's 2022 average of 10,791 kilowatt-hours purchased per residential customer.
Deep Fission plans to deploy its Gravity Nuclear Reactor, a small modular reactor based on pressurized water reactor technology, in boreholes about a mile underground. The company says the surrounding water column and rock are intended to provide pressure control, cooling and shielding. Each Gravity Nuclear Reactor unit is designed to produce up to 15 megawatts of electricity using low-enriched uranium, combining established nuclear, oil-and-gas drilling and geothermal technologies. The underground design is intended to reduce surface infrastructure and exposure to external hazards. The company was selected for the U.S. Department of Energy's Reactor Pilot Program and plans to pursue DOE authorization for a demonstration alongside a separate commercial license from the Nuclear Regulatory Commission.
The agreement's commercial operation conditions include licensing and other regulatory approvals, with Nuclear Regulatory Commission licensing, Kansas regulatory approvals and required power-delivery arrangements among the factors that could affect the project. The company's filing says the project could be delayed, reduced in scope or not completed, and it identifies tenant demand as a factor in project development. Deep Fission is obligated to pursue the project and supply power once licensed and operating, subject to the agreement's terms and conditions. The announcement didn't provide a commercial construction budget, general contractor, final design or construction schedule, meaning the next material milestones will include regulatory, engineering and delivery details that show whether the planned capacity can advance beyond the power agreement.