DOE approves nuclear safety design for Deep Fission's underground reactor
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Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation
August 6, 2026 7:00 AM EDTBERKELEY, Calif.--(BUSINESS WIRE)-- Deep Fission, Inc. (Nasdaq: FISN) (Deep Fission or the Company), an advanced nuclear energy company developing small modular pressurized water reactors installed one mile underground, today announced that the U.S. Department of Energy (DOE), has approved the company's Nuclear Safety Design Agreement (NSDA) for its Gravity Nuclear Reactor. This marks a major regulatory milestone, confirming that Deep Fission's reactor design warrants advancement under the Department of Energys Reactor Pilot Program.
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