Don't worry, I'll say it for you: apart from his various lawyers, thenuclear energy at the moment he is still that slightly particular relative that no one wants to host. Now, however, there are those who have had an idea: let's send him to live underground. Like, way underground. As if to say, the eye does not see, the heart does not hurt. Meet Deep Fission, friends.
Deep Fission: the atom does not go to the attic, but to the cellar
Do you know when as children they told us not to dig too much in the garden because we would reach China? Well, the guys from Deep Fission (not an underground metal band, but a startup from Berkeley) must have taken that story a little too seriously. Their idea is very simple: take a 15 megawatt micro nuclear reactor and stick it 1500 meters underground through a hole just 75 centimeters wide.
Yes, you understood correctly: a kilometer and a half of rock between us and the atom. It's like putting the cat in the cellar, except the cat weighs tons and produces energy for an entire city.
An innovative approach to a consolidated technology
Deep Fission isn't completely reinventing the wheel, so to speak. Their approach is based on the proven technology of pressurized water reactors (PWRs), already widely used in the nuclear industry.
The real innovation lies in the context of application: instead of building massive containment structures on the surface, the company proposes to exploit the earth's geology as a natural barrier.
Because the beauty of being 1500 meters deep is precisely the pressure. At that depth, you naturally reach the 160 atmospheres of water pressure that the reactor needs. It's like having a huge free pressure cooker. Mother Nature, as always, is the best engineer there is.
Security: any lower than this you go to hell
The depth of the reactor offers natural protection against numerous external threats. Extreme weather events, aircraft impacts, or potential acts of terrorism become virtually irrelevant at this depth. This “passive safety” represents a significant step forward compared to traditional active safety systems used in surface reactors.
What if something goes wrong? Despite the depth, Deep Fission designed the system to be accessible for maintenance and inspections. The reactor can be raised to the surface in a relatively short time, estimated at between one and two hours. This approach allows you to combine the advantages of security given by depth with the operational convenience necessary for efficient management.

Costs of Deep Fission? Digging costs less than building
The economic aspect is another strong point of the Deep Fission project. By eliminating the need for large containment structures and complex pressurization systems, the company claims construction and operating costs would be significantly lower than conventional reactors.
This could make nuclear energy more competitive in the global energy landscape. Of course, the Deep Fission project is not without its challenges. Managing nuclear waste, public acceptance of an underground reactor and complex regulatory approval procedures are just some of the issues the company will face. Good luck lawyers.
Is the future underground?
So, what do you think? Deep Fission may have squared the nuclear circle. Intrinsic safety, reduced costs, zero emissions. Does it sound too good to be true? Perhaps. But putting a man on the Moon also seemed crazy, until we did it. If we all agree on this, at least.
One thing is certain: Deep Fission has delved deep not only into the earth, but also into our ideas about what is possible in energy. Is this the solution we are looking for? The energy future may be deeper than we imagine, with solutions that seek to balance security, efficiency and sustainability in previously unimaginable ways.