Deep Fission, Inc.

Deep Fission, Inc. is a nuclear energy technology company that develops small modular reactors (SMRs). The company's reactor, called the Gravity Reactor, is based on established pressurized water reactor (PWR) technology. These reactors are designed for novel emplacement in deep boreholes, approximately one mile below the Earth's surface. The Gravity Reactor uses subsurface conditions to support containment and operating functions. This includes hydrostatic pressure from a water column within the borehole for reactor operating pressure and cooling, and the surrounding geological formation for structural confinement and shielding. This design aims to reduce the need for large surface containment structures and other safety infrastructure found in conventional nuclear power plants. It also intends to support faster deployment, improve security and safety, and enable lower capital and operating costs compared to conventional nuclear facilities, while reducing exposure to environmental and surface-level hazards. Each Gravity Reactor is designed to produce up to 15 megawatts of electric power output (MWe). These reactors can be deployed individually or in clusters of boreholes at a single site. Grouped installations may allow for longer refueling cycles through coordinated fuel management and staggered refueling schedules, more efficient use of shared infrastructure, and support larger installations capable of supplying hundreds and potentially thousands of MWe of generation capacity. Deep Fission, Inc.'s commercialization strategy involves a phased deployment plan aimed at commercialization within the next three years. The company is prioritizing the validation of the most differentiated parts of its system, specifically drilling to commercial depth, installing and integrating a nuclear system a mile underground, and operating as part of a complete energy ecosystem. The company is currently participating in the U.S.