Nuclear Waste: The Dark Side of the Microreactor Boom
Haley Zaremba

Nuclear energy is ready for its close-up. After decades of steep decline in the sector and relatively high levels of public mistrust for the controversial technology, the tides are turning in favor of a nuclear energy renaissance. The public memory of disasters like Fukushima, Three Mile Island, and Chernobyl is fading, and the benefits of nuclear – a zero-carbon, baseload energy source – are getting harder to ignore as deadlines for climate commitments grow closer and energy demand ticks ever higher. But the future of the nuclear energy sector will look a bit different than its last boom time, from technological advances to the makeup of its biggest backers. 

In Russia and Asia, nuclear energy has stayed popular, but in the West, nuclear had almost entirely fallen out of favor up until the last few years. In the United States, the Biden administration helped to build momentum for a nuclear comeback through its flagship Inflation Reduction Act, which included tax breaks and other incentives for various nodes of the nuclear sector. Over in Europe, nuclear advocates are trying to push through policy supporting nuclear power as Europe reconfigures its energy landscape to contend with energy sanctions on Russia. Public opinion in the West is also shifting in favor of nuclear power. As of 2023, a Gallup poll showed that support for nuclear energy in the United States was at a 10-year high.

Some of the biggest proponents of the nuclear energy renaissance are big tech bigwigs, who point to the power source as a critical solution to feed the runaway power demand of Artificial Intelligence. In fact, the growth trend of data centers’ energy demand is so extreme that it will soon outstrip the United States’ production potential if nuclear energy – and a host of other low-carbon solutions – are not utilized, and soon. Tech bigwigs, therefore, have good reason to back nuclear energy – oh, and they also just so happen to be behind a rash of nuclear energy startups.

But the new kind of nuclear that these companies are trying to bring onto the scene will not be the same as the nuclear technologies that had so solidly fallen out of favor over the last few decades. Traditional nuclear energy has a number of drawbacks, most notably its extremely high up-front costs and the additional costly burden of storing hazardous nuclear waste. New nuclear advocates want to confront the former challenge by rolling out much smaller versions of nuclear reactors, which can essentially be mass-produced and then installed on site for much lower development costs. 

Currently, the industry is undergoing a competitive race to corner the market on nuclear microreactors, which are about the size of a shipping container and function somewhat like a giant battery pack. “Microreactors have the ability to provide clean energy and have passive safety features, which decrease the risk of radioactive releases,” Euro News recently reported. “They are also much cheaper than bigger plants as they are factory-built and then installed where they are needed in modules.”

These microreactors can be used in a huge range of applications and do not require any on-site workers for their operation and maintenance. Instead, they can be operated remotely and autonomously. As a result, they have much lower overhead costs as well as lower up-front costs. So what’s the downside?

Well, it’s a big one. Scientists have found that, contrary to what nuclear advocates have touted, small nuclear reactors produce extremely high levels of nuclear waste, and could even be worse for the planet than their full-sized predecessors. “Our results show that most small modular reactor designs will actually increase the volume of nuclear waste in need of management and disposal, by factors of 2 to 30,” said Stanford study lead author Lindsay Krall. “These findings stand in sharp contrast to the cost and waste reduction benefits that advocates have claimed for advanced nuclear technologies.”Some members of the scientific community have taken notice: “Say no to small modular reactors,” blasted a recent headline from the Bulletin of Atomic Scientists. 

However, the voices decrying the rollout of small- and microreactors seem to be in the minority, as the Silicon Valley-backed industry barrels full speed ahead. Countries across Europe havejumped into the race as well, and its high levels of momentum – fuelled by the seemingly unstoppable expansion of AI – are unlikely to be impeded by the scientists yelling doomsday warning, however well-founded, from the sidelines. 

By Haley Zaremba for Oilprice.com

Haley Zaremba is a writer and journalist based in Mexico City. She has extensive experience writing and editing environmental features, travel pieces, local news in the Bay Area, and music/culture reviews.

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