Media

The Cool Down | 01.02.2026

Officials break ground on first-of-its-kind underground nuclear reactor: ‘For decades to come’

Construction on a revolutionary new kind of nuclear power plant is underway in Kansas. According to KCUR, an NPR affiliate, startup Deep Fission plans to install a small nuclear reactor a mile underground in the town of Parsons. The mini nuclear plant will be located at the Great Plains Industrial Park — the former site of the Kansas Army Ammunition Plant. It aims to attract data centers and other energy-intensive industries.

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KCLY Radio | 12.04.2025

Deep Fission Chooses Great Plains Industrial Park for Landmark Underground Reactor Pilot

Deep Fission, an advanced nuclear energy company that places small modular reactors one mile underground, has chosen the Great Plains Industrial Park in Parsons, Kansas, for its first pilot project. The company will break ground on Tuesday, December 9, and plans to complete construction and start up the reactor by July 4, 2026, if the Department of Energy (DOE) approves the next steps.

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IEEE | 11.20.2025

Deep Fission Plans to Sink Nuclear Reactors Deep Underground > The company hopes reactors in boreholes will be safer and cheaper

By dropping a nuclear reactor 1.6 kilometers (1 mile) underground, Deep Fission aims to use the weight of a billion tons of rock and water as a natural containment system comparable to concrete domes and cooling towers. With the fission reaction occurring far below the surface, steam can safely circulate in a closed loop to generate power.

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OK Energy Today | 10.18.2025

Firm wants to build 1-mile deep nuclear reactor in Kansas

A company with plans to construct small, nuclear reactors 1 mile underground for data centers and other electricity-hungry industries plans to put its first reactors in Kansas, Texas and Utah. Deep Fission, a Berkeley, California company, announced its plans saying its technology will be able to meet the “explosive demand for power from artificial intelligence” and signed letters of intent with undisclosed partners in each of those states.

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EnerCom Denver | 09.26.2025

EnerCom Interview with Deep Fission CEO Liz Muller

At the 30th annual EnerCom Denver conference, we interviewed Deep Fission CEO Liz Muller. Deep Fission is harnessing three technologies—pressurized water reactor technology, drilling, and geothermal—to solve the nuclear waste problem by storing nuclear waste in a borehole one mile underground. They expect to be able to lower the cost of conventional nuclear power by about 80% and decrease the time from construction start to reactor operations in about six months.

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The Economist | 09.03.2025

Burying nuclear reactors might make them cleaner and cheaper

Sometimes an idea is so elegant that it really deserves to work. One such proposal is Elizabeth Muller’s brainwave to build a reactor at the bottom of a mile-deep shaft drilled into Earth’s crust, and then fill the shaft with water. This would, in one fell swoop, minimise the risk of radioactive leaks, dispose of the “hot” waste reactors generate and eliminate much of the paraphernalia that make them expensive to build and run.

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Business Insider | 04.22.2025

We’re a father-daughter duo who have built 3 successful businesses. Working together isn’t always easy, but it’s meaningful.

Deep Fission CEO Liz Muller and her 81-year-old father, inventor Rich Muller, shared their secret to building three successful businesses together including: Berkeley Earth, a nonprofit that provides critical climate-science data; Deep Isolation, a nuclear waste disposal company; and Deep Fission, a nuclear energy company burying small modular reactors a mile underground.

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