U.S. to Test 1-Megawatt Mini Nuclear Plants on Trucks to Replace Diesel Generators by 2026

Written by Bruno Teles

Published on 15/08/2025 at 09:47

Updated on 15/08/2025 at 12:26

Tecnologia de reatores nucleares em caminhão pode reduzir diesel em regiões isoladas mas enfrenta resistência política

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Mini Nuclear Plants Inside Trucks Could Change Energy Generation in the US Starting in 2026. Pilot Projects Should Start in Idaho and Could Bring Clean Energy to Remote Areas, but Risks Still Divide Experts

The mini nuclear plants inside trucks are about to become a reality in the United States. Small reactors, with a capacity of up to 1 megawatt, could be transported in containers on trucks to supply energy in remote regions or for specific industrial operations. The first test is scheduled to occur in 2026, in the state of Idaho, marking the final phase before regulatory approval.

The technology, advocated by the US Department of Energy, promises to generate clean energy on demand and replace diesel generators, especially in hard-to-reach areas. However, critics warn of safety issues, the disposal of nuclear waste, and the logistics of transporting these mobile reactors.

How Mobile Nuclear Plants Work

Unlike large nuclear complexes, which require cooling towers and concrete structures, mini nuclear plants inside trucks use helium gas, molten salt, or alkaline metals for cooling, eliminating the need for water. They operate with meltdown-proof uranium, encapsulated in spheres coated with TRISO fuel, which withstands extreme temperatures.

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The Case of the Golden Chest Mine in Idaho

The Golden Chest mine, the last hard rock gold mine in operation in Idaho, will be the first site to test the technology. The facility is already connected to the power grid but will serve as a showcase to evaluate the performance, safety, and economic viability of the mobile reactors.

If approved, the model could be used to reduce dependence on fossil fuels, especially in areas where building transmission lines is unfeasible or expensive. In addition to Idaho, there are negotiations for use in regions of Alaska and Wyoming, although there is strong local resistance in the latter due to waste storage concerns.

Support and Resistance to the Technology

The project has garnered interest from companies like Westinghouse and BWXT, which already supply reactors to the US Navy. The government sees the proposal as a way to accelerate the transition to low-emission energy while maintaining energy security.

On the other hand, experts like Ed Lyman from the Union of Concerned Scientists warn that transporting nuclear material through populated areas without adequate emergency planning poses a high risk. Additionally, the lack of high-quality enriched uranium produced in the US is another logistical challenge for expansion.

What to Expect in the Coming Years

The first regulatory tests at the Idaho National Laboratory will be crucial in determining whether these units can be used on a commercial scale. If approved, mini nuclear plants inside trucks could usher in a new phase in clean and decentralized energy generation in the United States.

Do you believe that Brazil should invest in technologies like mobile mini nuclear plants, or are the risks still too great to bet on them? Leave your opinion in the comments.

U.S. to Test 1-Megawatt Mini Nuclear Plants on Trucks to Replace Diesel Generators by 2026

Mini Nuclear Plants Inside Trucks Could Change Energy Generation in the US Starting in 2026. Pilot Projects Should Start in Idaho and Could Bring Clean Energy to Remote Areas, but Risks Still Divide Experts

How Mobile Nuclear Plants Work

The Case of the Golden Chest Mine in Idaho

Support and Resistance to the Technology

What to Expect in the Coming Years

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U.S. to Test 1-Megawatt Mini Nuclear Plants on Trucks to Replace Diesel Generators by 2026

Mini Nuclear Plants Inside Trucks Could Change Energy Generation in the US Starting in 2026. Pilot Projects Should Start in Idaho and Could Bring Clean Energy to Remote Areas, but Risks Still Divide Experts

How Mobile Nuclear Plants Work

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Support and Resistance to the Technology

What to Expect in the Coming Years

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