In Berkeley, California, Deep Fission, Inc. (Nasdaq: FISN) revealed their advancement in developing small modular pressurized water reactors placed one mile below ground level. They recently disclosed signing Letters of Intent (LOIs) with various entities including data centers, co-developers, industrial parks, and strategic partners. These agreements reflect a potential generation capacity of up to 18.5 gigawatts (GW). The significant interest in their underground reactor technology is underscored by the increasing pipeline of partnerships.