Deep Fission (FISN) Status update summary

Commercial agreement and deployment

• Binding, conditional Master Energy Purchase Agreement completed Oct. 16, 2026, converting the Dec. 2025 LOI for Great Plains Industrial Park; power supply is subject to licensing, operation and agreement terms.

• Pilot of up to 5 MWe targets commercial electricity in Dec. 2027; pilot construction is targeted for March 2027, subject to approvals, technical results, financing and customer commitments.

• Great Plains initial phase is up to 150 MW, targeting commercial operation Sept. 30, 2028; later phases could bring capacity to 2,000 MW by 2031, subject to demand.

• GPDA purchases electricity generated and made available for tenants, up to contracted capacity; no minimum purchase obligation, and obligations may be assigned to qualifying tenants.

• Blue Owl invested $20 million; cloud-provider opportunities include up to 2 GWe, alongside a multi-GWe pipeline of non-binding letters of intent.

Market opportunity and site

• Great Plains Industrial Park spans more than 14,000 acres; 100 acres are controlled at Parsons for the DOE demonstration and initial power projects.

• U.S. demand gap is estimated at ~114 GW by 2030; deployment concepts include 10 reactors for a 150 MWe industrial site and 100 reactors for a 1.5 GWe hyperscale campus.

• Kansas plans include grid delivery through transmission lines and engagement with Evergy; additional sites are under consideration.

Technology and construction

• Gravity Nuclear Reactor combines conventional PWR technology and standard LEU with underground placement roughly one mile deep; surrounding rock and water are intended to support pressure control, cooling and shielding.

• Design includes gravity-fed cooling, pressure equalization at ~160 atm and three isolated heat-transfer loops; 40+ innovations and 26+ pending patent applications are cited.

• Completed a ~6,000-foot Kansas data borehole and a Florida shallow demonstration installing and retrieving a full-size non-nuclear canister; large-diameter drilling and non-nuclear testing are underway.

• Youngquist Brothers is evaluating 30–60-inch drilling sections, reverse-circulation methods, custom bits, electric rigs and precision cementing; work reduced planned 60-inch borehole R&D costs.

• Planning assumption is 15 MWe per repeat-deployment reactor; units are expected to operate 7–10 years, with a 40-year borehole design life allowing four or five reactors per borehole.