That's a question a lot of people are asking as the field of nuclear-powered electricity attempts a comeback in the U. S. An article in the MIT Technology Review examines some critical issues that will affect the answers to that question.
U. S. nuclear power has had a checkered career. Beginning in the 1950s, nuclear power plants were built by the leading nuclear-bomb-making countries: the old Soviet Union, England, and the U. S. A building boom in the U. S. for nuclear plants peaked in the late 1970s, and some years since then, as much as 20% of total U. S. power came from nuclear sources. However, after about 2000, with cost overruns and bad publicity such as the accidents at Three Mile Island in Pennsylvania in 1979 and Chernobyl, Ukraine in 1986, utilities quit planning new plants, and shut down several old ones.
But with the rising concerns about climate change, nuclear power plants began to look better for the environment than fossil-fuel plants. They also have a huge advantage over most renewable sources such as wind and solar, which are subject to the vagaries of nightfall and wind speed. A properly-run nuclear plant can be an extremely reliable source, stabilizing a grid with renewables that might otherwise run out of energy on a still, dark night.
The Technology Review article points out some problems in getting a new nuclear-power industry started. The fuel, for instance, is typically something called "high-assay low-enriched uranium" (HALEU for short). It has between 5% and 25% U-235, the highly-fissionable isotope of uranium which makes fission plants using uranium workable. Right now, the only source of new HALEU is Russia, although the U. S. government has a stockpile that it's currently doling out to experimental plants. This issue needs to be resolved before new conventional nuclear plants go online here in a major way.
Another issue is safety. While avoiding publicity, the Trump administration has relaxed some safety and security measures and environmental regulations pertaining to nuclear plants. One can argue that excessive regulation and time-consuming permitting processes were big factors in putting the kibosh on nuclear in the first place. But regulations are like preparing for war, in that you never know whether you did an inadequate job until something bad happens, and by then it's too late. Time will tell whether the new regulation situation will merely speed up the construction of new plants or lead to problems with safety. And unlike fossil-fuel plants, cleaning up a nuclear-plant accident can be orders of magnitude more expensive and dangerous, as we learned from the Fukushima nuclear-plant accident in 2011.
Finally, will new nuclear plants make a profit for their investors, or will they turn into financial albatrosses that bankrupt their owners, as has happened in the past with reactor projects that went way over budget? One measure of how attractive nuclear plants are compared to other kinds is the cost per installed kilowatt. Fossil-fuel plants can be built for around $1600 per kilowatt or less. China reportedly builds their nuclear plants for between $2,000 and $3,000 per kilowatt. Estimates for the various types of new U. S. nuclear plants vary, but figures between $6,000 and $10,000 per kilowatt seem realistic for the first new advanced models. The price could come down if the nuclear industry learns to standardize models rather than building each plant from scratch, which practice has contributed to cost overruns in the past. But going to a standardized model will require changes in the regulatory environment which may or may not come to pass.
Here in Texas, startup reactor builder Last Energy has teamed with Texas A&M University to build a 5-megawatt pressurized-water reactor at the RELLIS campus, a former air force base ten miles away from the main campus in Bryan-College Station. News releases predict the facility will go critical in the summer of 2026, which is ambitious but possible. The pressurized-water reactor design is not innovative, having been used for the first nuclear-powered submarines in the 1950s. But with modern construction and control techniques, designers may be able to build on the decades of experience gained with the design to produce a standardized module that can be scaled up fairly easily to commercial size, in the 20-megawatt or larger range.
Newer designs are also in the works. Some designs use boiling water rather than pressurized liquid water, and this simplifies the design. Other designs use liquid metals for coolants, fuel in pebble rather than rod form, and other variations on the conventional design. But there is a long road between experiments and a commercially profitable plant, and many previously-announced plans for smaller modular plants have been cancelled.
Nevertheless, if some new designs can be shown to work safely and not cost an arm and a leg during the current administration's fairly favorable regulatory environment for nuclear power, the industry could make a substantial contribution toward the nation's energy needs, which have recently soared due to the boom in data-center construction.
Building nuclear plants to run data centers is not going to appeal to your typical activist, and there are downsides to nuclear energy, notably the problem of waste. Some of the newly proposed reactor schemes generate much less waste than conventional U-235 reactors, but again, these are only proposals, not working reactors. The current policy in the U. S. of keeping waste stored locally rather than transporting it and concentrating it at one big waste facility seems to be working so far. But "so far" compared to the dangerous centuries-long lifetime of nuclear waste is not very long, and it would be better if we could produce less waste to start with rather than making lots of it and figuring out what to do with it afterwards.
The next couple or three years may be a make-or-break time for nuclear power in the U. S. From many points of view, it is a sensible and proven way to generate electricity. If we can adjust the regulatory environment and adapt to new modular manufacturing techniques without compromising safety, nuclear power could make a climate-friendly and reliable contribution to our future energy needs. But that is currently a big "if," and only time will tell us whether hopes for a more-nuclear future will be justified or dashed.
Sources: The MIT Technology Review article I referred to, "Three Questions About Next-Generation Nuclear Power, Answered," appears at https://www.technologyreview.com/2026/02/05/1132197/nuclear-questions/. I also referred to the website https://www.nei.org/resources/statistics/us-nuclear-generating-statistics for statistics on nuclear power and the sites https://news.tamus.edu/stories/last-energy-texas-am-collaborate-to-launch-microreactor-pilot-at-texas-am-rellis/and https://www.neimagazine.com/news/last-energy-funded-for-pwr-5-pilot/?cf-view for information on the Texas A&M 5-megawatt RELLIS unit.