These nuclear companies are leading the race to build advanced small reactors in the U.S.
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The nuclear industry is racing to launch advanced small reactors by the early 2030s, aiming to meet the deep-pocketed technology sector’s growing need for electricity to fuel artificial intelligence.
The world has relied largely on the same pressurized-water reactor technology for the past 70 years, but those plants have proven incredibly expensive to build in the U.S. in the 21st century.
The first new nuclear plant completed in decades, reactors 3 and 4 at Plant Vogtle in Georgia, infamously cost about $18 billion more than expected and opened seven years behind schedule. Each of those reactors can generate 1,114 megawatts of electricity, enough for more than 800,000 homes.
“Doing these new builds with that older, high pressure technology is just unaffordable,” Chris Levesque, CEO of TerraPower, an advanced reactor company co-founded and backed by Bill Gates, told CNBC.
Despite growing interest in restarting closed reactors, such as Palisades in Michigan and Three Mile Island in Pennsylvania, as a quicker and cheaper near-term solution, there remains “a whole lot of hesitation about a brand new plant,” Levesque said.
The advanced reactors under development promise to have smaller, lighter footprints that could make them cheaper and quicker to build when they are fully commercialized. But the industry is crowded with more than 90 different technologies in various stages of development around the world, according to the Nuclear Energy Agency.
The utility and tech sectors need to winnow down the field to five or 10 companies with the right technology, said John Ketchum, CEO of NextEra Energy, the largest power company by market capitalization in the U.S.
“A lot of them are under capitalized,” Ketchum said of the small nuclear startups designing advanced reactors. “So we’ve got to pick out the ones that we really want to get behind and make the bets,” the CEO said at the CERAWeek energy conference in Houston earlier this month.
Ketchum sees the first advanced reactor coming online around 2031 in the U.S., with more units potentially on the way around 2035. Technology companies will serve as a catalyst, with Levesque saying they are a “huge force” that can drive the industry forward due to their immense demand for electricity coupled with their deep pockets. Alphabet, Amazon, Meta and Microsoft together are worth seven times the value of the entire S&P 500 utility sector.
The following are some of the leading players in the U.S. market to revive nuclear power, all three of them private but with significant financial backing — often from tech companies — and customers already lined up.
TerraPower
TerraPower is the first advanced reactor company in the U.S. to move from design to construction, breaking ground on its first plant near a former coal site in Kemmerer, Wyoming in the summer of 2024. The company aims to start dispatching power by the end of 2030 to Warren Buffett’s PacifiCorp.
TerraPower’s Natrium reactor operates at atmospheric temperature, a feature that Levesque says will reduce construction costs.
The U.S. currently relies on reactors that operate at about 300 Celsius (572 degrees Fahrenheit) and are cooled by water. The system operates under high pressure — water boils at 100 degree Celsius — to keep the coolant liquid, and the plants need heavy, expensive components to contain the pressure, Levesque said.
TerraPower uses sodium, rather than water, as a coolant. Liquid sodium boils at 900 Celsius, much higher than the Natrium reactor’s operating temperature of around 500 Celsius. That means the plant does not need to be pressurized, Levesque said.
Using a low-pressure, lighter plant to avoid high pressure systems “reduces tons of steel, tons of concrete, labor hours, numbers of systems,” Levesque said. He estimates that Natrium plants will cost about half as much to build as a traditional nuclear plant, with prices coming down as more are built.
The Natrium reactor has a power capacity of 345 megawatts, enough for more than 250,000 homes. A plant will have the ability to ramp up to 500 megawatts for several hours by storing heat in a thermal battery made of molten salt, Levesque says. The idea is to be able to dispatch power on demand to the grid when renewable solar and wind power fade because the sun isn’t shinning or winds are slack.
TerraPower has the financial backing of its key founder Bill Gates, SK Group, one of South Korea’s largest energy providers, and ArcelorMittal, a steelmaker. Gates and SK Group led TerraPower’s $830 million funding round in 2022. The Wyoming project is backed by $2 billion from the Department of Energy, which TerraPower says it will match dollar for dollar.
TerraPower filed its construction license application with the Nuclear Regulatory Commission in 2024 and expects the regulator will issue a permit in December 2026.
“We’re trying to show folks we’re inevitable,” Levesque said.
X-Energy
Of all the advanced reactor companies, X-Energy is the first to win a direct investment from a tech company, securing hundreds of millions of dollars from Amazon to build its Xe-100 reactor.
“What this sector needs is risk capital to invest in plants because U.S. utilities aren’t doing it today,” X-Energy CEO Clay Sell told CNBC.
X-Energy’s most recent financing round raised $700 million, led by Amazon and with additional capital from Citadel founder Ken Griffin, Ares Management, Segra Capital Management, Jane Street Capital and the University of Michigan, among others.
“One of the largest corporations in America, a company that is in size larger than the entirety of the investor-owned utility sector in the U.S., was stepping forward and saying we want to facilitate the new nuclear future in the United States,” Sell said of Amazon’s investment.
The cash will largely go to completing the reactor design so it’s ready for construction, and finishing the first phase of X-Energy’s fuel facility, Sell said.
The Xe-100 is an 80 megawatt reactor sold in a pack of four units to construct 320 megawatts in total, the CEO said. The multiple units create redundancy and the small size allows the biggest component, the reactor vessel, to ship from a factory via road to the construction site, Sell said.
The reactor uses helium gas as a coolant rather than water. X-Energy has its own proprietary fuel made of graphite pebbles that contain uranium kernels encased in ceramic. Sell said the graphite can’t melt, which makes the plant “intrinsically safe.”
Amazon’s investment will finance four Xe-100 reactors in Washington state that will be built, owned and operated by Energy Northwest, a utility, with plants coming online in the early 2030s. The intent is to scale up to a dozen Xe-100s in Washington, Sell said.
X-Energy is also working with Dow Inc. to deploy four reactors at the chemical company’s manufacturing facility in Seadrift, Texas. The Department of Energy has awarded X-Energy up to $1.2 billion to develop and deploy its technoloy.
X-Energy aims to become the first company to commission an operational advanced reactor in the U.S., Sell said.
Kairos Power
Kairos Power signed a contract with Alphabet’s Google unit last year to deploy multiple, advanced reactors, aiming to supply the YouTube company with 500 megawatts of power. The first reactor is expected to come online in 2030, with additional deployments through 2035.
Financial terms of the deal weren’t disclosed, but the Google contract is “immensely important,” allowing Kairos to “plan the infrastructure not just for one project but for a series of projects,” CEO Mike Laufer told CNBC.
“It allows us to scale our infrastructure, production — our manufacturing capabilities,” Laufer said.
The 75-megawatt Kairos’ reactor will be deployed in pairs to provide 150 megawatts of total power. Similar to TerraPower, Kairos’ reactor operates at near atmospheric pressure using molten fluoride salt instead of water as coolant. Like X-Energy, Kairos uses fuel that encases uranium kernels in ceramic and graphite pebbles that can’t melt in high-temperature reactors, according to the company.
Kairos is building a low-power, demonstration reactor in Oak Ridge, Tennessee to showcase its ability “to deliver clean, safe, and affordable nuclear heat.” Oak Ridge, site of a national laboratory about 25 miles west of Knoxville, was where uranium was enriched as part of the Manhattan Project to build the first atomic bombs.
Today, there will be a “natural thinning” in the number of advance reactor companies, Kairos CEO Laufer said: “It’s going to be driven by who can actually be in a position to execute projects,” he said.
Hyundai has unveiled the design refresh of its Ioniq 6 sedan, and announced that it will become a family of cars rather than a single model, with an N Line trim and upcoming N performance model, much like its sister car the Ioniq 5.
Hyundai has been doing great with its EVs lately, hitting sales records and getting great reviews.
Much of that focus has been on the Ioniq 5, an attractive crossover SUV with lots of capability at a good price – and a bonkers N performance version which has been breaking different kinds of records.
The Ioniq 6, conversely, hasn’t attracted quite as much attention, even though it has some records of its own (it’s the most efficient vehicle in the US… for under $70k).
Between its admittedly odd looks – much more aerodynamic and rounded than the comparatively blocky 5 – and it fitting into the less-popular (but better) sedan form factor, it just hasn’t captured as much imagination as the 5.
It has also fallen somewhat behind. The Ioniq 5 got a big update this year, including a native NACS port, the first non-Tesla mass market vehicle to hit the road with one of these included (and it even charges faster than a Tesla does on home turf). The 6, however, is still sitting on its original design from when it first started production/shipping in 2022/23.
But that’s about to change, as Hyundai is giving the model some love with a design update and some hints at new things to come.
We’ve seen spy shots of these design updates before, but now Hyundai is showing them to everyone at the Seoul Mobility Show.
Hyundai showed two models today, the standard Ioniq 6 and the “N Line,” an upgraded trim level with some interior and exterior changes to look a little more sporty. Hyundai has used similar nomenclature for its other models, and that carries over here.
Both have a redesigned front end, making it look more aggressive than the prior bulbous and aerodynamic shape, and narrower headlights.
The N Line looks even more aggressive than the standard model, though, with an even more aggressive front and rear end.
Hyundai says that the redesign will also include interior enhancements for “a more comfortable, intuitive experience,” with a redesigned steering wheel, larger climate control display, upgraded materials and redesigned center console with more physical controls.
Beyond this, the refresh was light on details – intentionally, with a full unveil of specs and changes coming later. We can imagine a lot of the improvements on the 2025 Ioniq 5 will be carried over, such as a native NACS port for example, and potentially a slightly larger or faster-charging battery.
We had also previously heard hints that an N version (yes, “N” and “N Line” are different, no, we don’t know why they used these confusing names) of the Ioniq 6 is coming, and Hyundai reiterated those hints today – even giving us a glimpse of the car in the background of one of its shots.
Now THIS one looks quite aggressive, with a bigger double wing and potentially some changes to the diffuser (it’s hard to tell from the shot, as the N Line also has a modified diffuser).
The ioniq 5N has earned rave reviews from enthusiasts for its bonkers driving dynamics and comparatively reasonable price for a true performance vehicle. But it’s still an SUV format, and frankly, an SUV will never be a sportscar no matter how many horsepower you put into it (I will die on this hill).
The 6, however, with its sedan shape and footprint, could make for a much more compelling sports package once it’s all put together. So we’re very excited to see what Hyundai can do if they apply the same magic they put into the 5 into a new 6N. Looking forward to July.
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Over the next two years, homebuilder Lennar is outfitting more than 1,500 new Colorado homes with Dandelion Energy’s geothermal systems in one of the largest residential geothermal rollouts in the US.
The big draw for homeowners is lower energy bills and cleaner heating and cooling. Dandelion claims Lennar homeowners with geothermal systems will collectively save around $30 million over the next 20 years compared to using air-source heat pumps. Geothermal heat pumps don’t need outdoor AC units or conventional heating systems, either.
Geothermal systems use the sustained temperature of the ground to heat or cool a home. A ground loop system absorbs heat energy (BTUs) from the earth so that it can be transferred to a heat pump and efficiently converted into warmth for a home. Dandelion says its ground loop systems are built to last for over 50 years and should require no maintenance.
Dandelion’s geothermal system uses a vertical ground closed-loop system that is installed using well-boring equipment and trenched back into the house to connect to a heat pump. The pipes circulate a mixture of water and propylene glycol, a food-grade antifreeze, that absorbs the ground’s temperature. A ground source heat pump circulates the liquid through the ground loops and it exchanges its heat energy in the heat pump with liquid refrigerant. The refrigerant is converted to vapor, compressed to increase its temperature, then passed through a heat exchanger to transfer heat to the air, which is circulated through a home’s HVAC ductwork.
Daniel Yates, Dandelion Energy’s CEO, called the partnership with Lennar a “new benchmark for affordable, energy-efficient, and high-quality home heating and cooling.” By streamlining its installation process, Dandelion is making geothermal systems simpler and cheaper for homebuilders and homeowners to adopt.
This collaboration is happening at a time when Colorado is pushing hard to meet its clean energy targets. Governor Jared Polis is excited about the move, calling it a win for Coloradans’ wallets, air quality, and the state’s leadership on geothermal energy. Will Toor, executive director of the Colorado Energy Office, said that “ensuring affordable access to geothermal heating and cooling is essential to achieve net-zero emissions by 2050, and we’re excited to be part of such a huge effort to bring this technology to so many new Colorado homes.”
And it’s not just about cutting emissions – geothermal heat pumps help reduce peak electric demand. Analysis from the Department of Energy found that widespread adoption of these systems could save the US from needing 24,500 miles of new transmission lines. That’s like crossing the continental US eight times.
Colorado is making this transition a lot more attractive through state tax credits and Xcel Energy’s rebate programs. These incentives slash upfront costs for builders like Lennar, making geothermal installations more financially viable. The utility’s Clean Heat Plan and electrification strategy are working to keep energy bills low while meeting climate goals.
Read more: This will be the first geothermal energy storage system on the Texas grid
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Polestar has removed the Polestar 2 from its US website header in an early sign of how new tariffs will restrict choice and competition for American consumers, thus increasing prices.
The Polestar 2 is Polestar’s first full EV – the original Polestar 1 was a limited-edition plug-in hybrid.
It started production in 2020 in Luqiao, Zhejiang, China, where Polestar and Volvo’s parent corporation, Geely, was founded.
And there’s the rub: while Polestar’s newer EV, the 3 (which we just drove the new single motor version of last week), is built in South Carolina, the 2 is not.
Unfortunately, that interacts with some news that has been getting a lot of play lately: tariffs.
The US has been gradually getting stupider and stupider on the issue of tariffs, apparently determined to increase prices for Americans and decrease the competitiveness of American manufacturing in a time of change for the auto industry.
It is widely acknowledged (by anyone who has given it a few seconds of thought) that tariffs increase prices and that trade barriers tend to reduce competition, leading to less innovation.
It started with 25% tariffs on various products from China, implemented in the 2018-2020 timeframe. Then, in 2024, President Biden implemented a 100% tariff on Chinese EVs, effectively stopping their sale in the US. These tariffs included some exceptions and credits based on Volvo’s other US manufacturing, which Polestar had used to keep the most expensive versions of the 2 on sale in the US, while restricting the lower-priced versions from sale. Nevertheless, they were a bad idea.
Now, in yet another step to make America less competitive and inflate the prices of goods more for Americans, we got more tariff announcements today from a senile ex-reality TV host who wandered into the White House rose garden (which he does not belong in). These tariffs do not include the same exceptions as the previously-announced Biden tariffs.
Apparently this has all been enough for Polestar, as even in advance of today’s tariff announcements, the company suddenly removed its Polestar 2 from its website header today.
The change can be seen at polestar.com/us, where only the Polestar 3 and 4 are listed in the header area. On other sites, like the company’s Norwegian website or British website, the car is still there. The Polestar 2 page is still up on the US website, but it isn’t linked to elsewhere on the site (we’ll see how long it stays up).
We reached out to Polestar for comment, but didn’t hear anything back before publication. We’ll update if we do.
It makes sense that the Polestar 2 would still be for sale elsewhere, as it only started production in 2020. Most car models are available for at least 7 years, so this is an earlier exit than expected.
So it’s likely that all of the tariff news is what had an effect in killing the Polestar 2.
Then again, this is also just the second day of a new fiscal quarter. Perhaps the timing offers Polestar an opportunity to make a clean break – especially now that the lower-priced version of its Polestar 3 is available.
Despite the lower $67.5k base price of the new Polestar 3 variant, that represents a big increase in price for the brand, which had sold the base model Polestar 2 for around $50k originally, before all of these tariffs.
Update: Polestar got back to us with comment, but understandably, it doesn’t say much:
Polestar is a three-car company and Polestar 2 is available for customers now. There are a select number of Polestar 2s in stock at retailers that can be found on Polestar.com, but Polestar 3 and Polestar 4 will be the priority in the North American market.
Electrek’s Take
This isn’t the first car that America has been deprived of due to tariffs. The Volvo EX30, one of our most anticipated vehicles, and Electrek’s Vehicle of the Year for 2024, had its American availability pushed back due to tariffs.
Volvo decided to build the car in Belgium and export it to the US, but now that new tariffs apply to the EU as well, maybe that low-priced, awesome, fast, small EV will instead stay in Europe instead of being shipped overseas.
This shows how mercurial tariff fiats from an ignoramus are bad for manufacturing, as they mean that companies can’t make plans – and if they can’t make plans, eventually, they’ll probably just write the country making the random decisions out of their plans so they don’t have to deal with the nonsense.
And we’ve heard this from every businessperson or manufacturer representative we’ve talked to at any level of the automotive industry. Nobody thinks any of this is a good idea, because it objectively is not. All it does is make business harder, make the US less trustworthy, make things more expensive, and overall just harm America.
Yet another way that Americans are getting screwed by this stupid nonsense. 49% of you voted for inflation, and 100% of Americans are now getting it. Happy Inflation Day, everyone.
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