Westinghouse and Radiant launch mobile nuclear microreactor tests in the US

By: Russell Thompson | 13.07.2025, 12:19

The US Department of Energy has given the green light to a new generation of nuclear reactors - the size of a trailer. Two microreactors - Westinghouse's eVinci and Radiant's Kaleidos - have been selected for the world's first tests as part of the DOME programme, which will take place at Idaho National Laboratory.

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It's part of a plan to reduce dependence on diesel and make off-grid energy sources more mobile, environmentally friendly and reliable.

One such reactor produces between 1.2 and 5 megawatts, which is small compared to classic nuclear power plants, but more than enough for dozens of households, military bases or emergency response sites. The reactors can be transported by road, rail and even aircraft - and this is not a fantasy. The first launch is scheduled for spring 2026, with tests lasting about six months. This will test their stability, efficiency and ability to operate without refuelling for decades.

The bet on small nuclear technology is not just an engineering grab, but a strategic response to future challenges. While the world looks anxiously at the fragility of energy grids, the US is preparing to launch energy on wheels. Micro-reactors are not an alternative to megacities, but a great solution for places where every kilowatt is worth its weight in gold.

Source: US Departament of Energy