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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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