Deep Fission, a California nuclear startup, is working with a data center developer to build small nuclear reactors a mile underground.

Deep Fission and Endeavour Energy partner to bury nuclear reactor a mile underground, powering data centers with clean, sustainable energy.

The Deep Fission Borehole Reactor 1 (DFBR-1) is a pressurized water reactor (PWR) that produces 15MWt (thermal) and 5MWe (electric) and has an estimated fuel cycle of between ten to 20 years.

Deep Fission aims to eliminate the need for costly concrete and steel surface containment buildings by placing its reactor a mile underground.