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Deep Fission is set to develop the Gravity Nuclear Reactor, a 15 MWe underground nuclear reactor located 1.6 km below the surface in the Great Plains Industrial Park, Kansas. This pressurized water reactor (PWR) will use low-enriched uranium (LEU) fuel and aims to supply industrial clients and data centers with low-emission energy.

The reactor's core and key components will be installed in a narrow borehole, utilizing existing infrastructure from the oil and geothermal sectors. The project has received authorization as a 'demonstration' under a flexible Other Transaction Agreement with the U.S.

Department of Energy (DOE), allowing for an expedited regulatory process. Deep Fission plans to submit a Combined License application to the Nuclear Regulatory Commission (NRC) in 2026. The company's business model focuses on providing reliable energy to large industrial customers, with initial funding of tens of millions of dollars already secured for the pilot unit.