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The country’s underwhelming new climate pledge is more than just bad news for the world — it reveals a serious governing mistake.

Five years ago, China’s longtime leader Xi Jinping shocked and delighted the world by declaring in a video presentation to the United Nations that his country would peak its carbon emissions this decade and achieve carbon neutrality by 2060. He tried to rekindle that magic late last month in another virtual address to the UN, announcing China’s updated pledge under the Paris Agreement.
This time, the reaction was far more tepid. Given the disastrous state of American climate policy under President Donald Trump, some observers declared — as the longtime expert Li Shuo did in The New York Times — that China is “the adult in the room on climate now.” Most others were disappointed, arguing that China had merely “played it safe” and pointing out the new pledge “falls well short” of what’s needed to hit the Paris Agreement’s targets.
Yet China’s dithering is more than just an environmental failure — it is a governing mistake. China’s weak climate pledge isn’t just bad news for the world; it shows an indecisive leadership that is undermining its country’s own competitiveness by sticking with dirty coal rather than transitioning rapidly to a cleaner future.
The new pledge — known in UN jargon as a nationally determined contribution, or NDC — reveals a disconnect between the government’s official position and the optimistic discourse that now surrounds China’s clean energy sector. China today is described as the world’s first electrostate; it stands at the vanguard of the solar and EV revolution, some say, ready to remake the world order against a coalition of petrostate dinosaurs.
The NDC makes it obvious that the Chinese government does not yet view itself in such a fashion. China might look like an adult, but it more closely resembles a gangly teenager who is still getting used to their body after a growth spurt. As the analyst Kingsmill Bond recently put it on Heatmap’s podcast Shift Key, Chinese clean tech manufacturers have unlocked a cleaner and cheaper path to economic development. It isn’t yet clear that China is brave enough to commit to it. If China is the adult in the room, in other words, we’re screwed.
Let’s start by giving credit where due. For a country that had never offered an absolute emissions reduction target before, Xi’s promise — to cut emissions by 7% to 10% by 2035 — is a kind of progress. But observers expected China to go much further. Researchers at the University of Maryland and the Center for Research on Clean Air, for example, each suggested that emissions could decline by roughly 30% by that year. Only a reduction of this magnitude would actually keep the planet on a trajectory sufficiently close to the Paris Agreement’s goal to limit warming to 2 degrees Celsius.
Many inside China’s policy apparatus considered such ambitious cuts to be infeasible; for instance, Teng Fei, deputy director of Tsinghua University’s Institute of Energy, Environment and Economy, described a 30% reduction as “extreme.” Conversations with knowledgeable insiders, however, suggested a headline reduction of up to 15% was viewed as plausible. In that light, the decision to commit a mere 7% to 10% can only be seen as disappointing.
The NDC obviously represents a floor and not a ceiling, and China has historically only made climate promises that it knows it will keep. But even then, China’s leadership has given itself tremendous wiggle room. This can be seen in part by what is not in Xi’s pledge: any firm commitment about when, exactly, China’s emissions will peak. (His previous pledge only said that it would happen in the 2020s.) While it’s quite possible that 2024 or 2025 will end up being the peak, as some expect, the new pledge creates a perverse incentive to delay and pollute more now. The speech also contained little on non-CO2 greenhouse gases such as methane and nitrous oxide — which, given China’s previous commitment to reach net zero on all warming gases by 2060, seems like a significant blind spot.
Other commitments are only impressive until you scratch the surface. Xi pledged that China would install 3,600 gigawatts of solar and wind capacity by 2035. That may sound daunting: The United States, the world’s No. 2 country for renewables capacity, has a combined 400 gigawatts of solar and wind. But China already has about 1,600 gigawatts installed. So China’s promise, in essence, is to add around 200 gigawatts of solar and wind each year until 2035 — and while that would be a huge number for any other country, it actually represents a significant slowdown for China. The country added 360 gigawatts of wind and solar combined last year, and has already installed more than 200 gigawatts of solar alone in the first eight months of this one. In this light, China’s renewables pledge seems ominous.
More distressingly for climate action, it is unclear if this comparatively slower pace of clean electricity addition will actually allow China’s electricity sector to decarbonize. As the electricity analyst David Fishman has noted, China’s overall electricity demand grew faster than its clean electricity generation last year, leaving a roughly 100 terawatt-hour gap — despite all that new solar and wind (and despite 16 gigawatts of new nuclear and hydroelectric power plants, too). Coal filled this gap. Last year, China began construction of almost 100 gigawatts of new coal plants even though its existing coal fleet already operates less than half of the time. These new plants represented more than 90% of the world’s new coal capacity in 2024.
China’s climate strategy — like every other country’s — requires electrifying large swaths of its economy. If new renewables diminish to only 200 gigawatts a year, then it seems implausible that its renewable additions could meet demand growth — let alone eat away substantial amounts of coal-fired generation — unless its economic growth significantly slows.
Yet the news gets worse. Taken alone, the NDC’s weakness may speak of mere caution on China’s part, yet a number of policy changes to China’s electricity markets and industrial policy over the past year suggest its government is now slow-walking the energy transition.
In 2024, for instance, China started making capacity payments to coal-fired power plants. These payments were ostensibly designed to lubricate a plant’s economics as it shifted from 24/7 operation to a supporting role backing up wind and solar. Yet only coal plants — and not, for instance, batteries — were offered these funds, even though batteries can play a similar role more cheaply and China already makes them in scads. Even more striking, coal plants have been pocketing these funds without changing their behavior or even producing less electricity
At the same time, China’s central leadership has cut the revenues that new solar and wind farms receive from generating power. New solar and wind plants are now scheduled to receive less than the same benchmark price that coal receives — although the details of that discount vary by province and remain uncertain in most of them. Observers hope that this lower price, along with a more market-based dispatch scheme, will eventually allow renewables-heavy electricity systems to charge lower rates to consumers and displace more expensive coal power. However, there’s little clarity on if and when that will happen, and in the meantime, new renewables installations are plummeting as developers wait for more information to emerge.
Chinese industrial policy is exacerbating these trends. The world has long talked about Chinese overcapacity. Now even conversation in the Western media has progressed to discussing “involution” — a broader term that centers on the intensive competition that characterizes Chinese capitalism (and society). It suggests that Chinese firms are competing themselves out of business.
The market-leader BYD, for instance, has become synonymous with the Chinese battery-powered auto renaissance, but there are fears that even this seeming titan might have corrupted itself on the way. The company has larded an incredible amount of debt onto its books to fuel its race to the top of the sales charts; now, murmurs abound that the firm might be “the Evergrande of EVs” — a reference to the housing developer that collapsed into bankruptcy earlier this decade with hundreds of billions of dollars in debt. In recent months, BYD’s engine seems to be sputtering, with sales dropping in September 2025 compared with last year.
As such, the government has come in to try to negotiate new terms of competition so that firms do not end up doing irreparable harm to themselves and their future prospects. It is doing so in other sectors as well: In solar, it has tried to create a cartel of polysilicon manufacturers, a solar OPEC of sorts, to make sure that the pricing of that key input to the photovoltaic supply chain is at a level where the producers can survive.
This may all seem positive — and there is certainly an argument that the government could play a role in helping these new sectors negotiate the difficult waters that they find themselves in. But I interpret these efforts as further slow-walking of the energy transition. A slight reframing can help to understand why.
What is literally happening in these meetings? The government is bringing private actors into the same room to bang their heads together and deal with the reality that the current economic system is not working, largely because of intense competition — a problem likely best solved by forcing some of the firms and production capacity to shrink. Firms are unprofitable because exuberant supply has zoomed past current demand, and the country’s markets and politics are not prepared to navigate the potentially needed bankruptcies or their fallout. So the government is intervening, designing actions to generate the outcomes it desires.
Yet there is something contradictory about the government’s approach. A decarbonized world, after all, will be a world without significant numbers of internal combustion vehicles, so traditional automakers will eventually need to shut down or shift into EVs — yet their executives aren’t being dragged in for the same scolding. Likewise, a decarbonized world will be a world without as many coal mines and coal-fired power plants. Firms in the power sector should be scolded for continuing coal production at scale.
These are problems of the mid-transition, as the scholars Emily Grubert and Sara Hastings-Simon have described decarbonization’s current era. But China is further along in this transition than other states, and it could lead in the management and planning required for the transition as well.
China is stuck. For four decades, China’s growth rested on moving abundant cheap labor from low-productivity agriculture to higher productivity sectors, often in urban areas. The physical construction of China’s cities underpinned this development and became its own distorting bubble, launching a cycle of real-estate speculation. The government pricked this bubble in 2020, but since then, Chinese macroeconomic strength has failed to return.
Despite the glimmering nature of its most modern cities, China remains decidedly middle income, with a GDP per capita equivalent to Serbia. Many countries that have grown out of poverty have reached this middle income territory — but then become mired there rather than continuing to develop. This pattern, described as “the middle income trap,” has worried Chinese policymakers for years.
The country is obviously hoping that its new clean industries can offer a substitute motor to power China out of its middle-income status. Its leadership’s apparent decision to slow walk the energy transition, however, looks like a classic example of this “trap.” The leadership seems unwilling to jettison older industries in favor of the higher-value added industries of the future. The fact that the government has previously subsidized these industries just shows the complexity of the political economy challenges facing the regime.
The NDC’s announcement could be seen as an easy win given Trump’s climate backwardness. Clearly that’s what Xi was counting on. But China is too important to be understood only in contrast to the United States — and we should not applaud something that not only fails to recognize global climate targets, but also underplays China’s own development strategy. The country is nearing the release of its next five-year plan. Perhaps that document will incorporate more ambitious targets for the energy transition and decarbonization.
This summer, I visited Ordos in Inner Mongolia, a coal mining region that is now also home to some of China’s huge renewable energy megabases and a zero-carbon industrial park. Tens of thousands still labor in Ordos’ mines and coal-hungry factories, yet they seem like a relic of an earlier age when compared to the scale and precision of the new green industrial facilities. The dirty coal mines may still have history and profits on their side, but it is clear that the future will see their decline and replacement with green technology. I hope that Xi Jinping and the rest of the Chinese political elite come to the same conclusion, and fast.
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Alphabet and Amazon each plan to spend a small-country-GDP’s worth of money this year.
Big tech is spending big on data centers — which means it’s also spending big on power.
Alphabet, the parent company of Google, announced Wednesday that it expects to spend $175 billion to $185 billion on capital expenditures this year. That estimate is about double what it spent in 2025, far north of Wall Street’s expected $121 billion, and somewhere between the gross domestic products of Ecuador and Morocco.
This is a “a massive investment in absolute terms,” Jefferies analyst Brent Thill wrote in a note to clients Thursday. “Jarringly large,” Guggenheim analyst Michael Morris wrote. With this announcement, total expected capital expenditures by Alphabet, Microsoft and Meta for 2026 are at $459 billion, according to Jefferies calculations — roughly the GDP of South Africa. If Alphabet’s spending comes in at the top end of its projected range, that would be a third larger than the “total data center spend across the 6 largest players only 3 years ago,” according to Brian Nowak, an analyst at Morgan Stanley.
And that was before Thursday, when Amazon told investors that it expects to spend “about $200 billion” on capital expenditures this year.
For Alphabet, this growth in capital expenditure will fund data center development to serve AI demand, just as it did last year. In 2025, “the vast majority of our capex was invested in technical infrastructure, approximately 60% of that investment in servers, and 40% in data centers and networking equipment,” chief financial officer Anat Ashkenazi said on the company’s earnings call.
The ramp up in data center capacity planned by the tech giants necessarily means more power demand. Google previewed its immense power needs late last year when it acquired the renewable developer Intersect for almost $5 billion.
When asked by an analyst during the company’s Wednesday earnings call “what keeps you up at night,” Alphabet chief executive Sundar Pichai said, “I think specifically at this moment, maybe the top question is definitely around capacity — all constraints, be it power, land, supply chain constraints. How do you ramp up to meet this extraordinary demand for this moment?”
One answer is to contract with utilities to build. The utility and renewable developer NextEra said during the company’s earnings call last week that it plans to bring on 15 gigawatts worth of power to serve datacenters over the next decade, “but I'll be disappointed if we don't double our goal and deliver at least 30 gigawatts through this channel by 2035,” NextEra chief executive John Ketchum said. (A single gigawatt can power about 800,000 homes).
The largest and most well-established technology companies — the Microsofts, the Alphabets, the Metas, and the Amazons — have various sustainability and clean energy commitments, meaning that all sorts of clean power (as well as a fair amount of natural gas) are likely to get even more investment as data center investment ramps up.
Jefferies analyst Julien Dumoulin-Smith described the Alphabet capex figure as “a utility tailwind,” specifically calling out NextEra, renewable developer Clearway Energy (which struck a $2.4 billion deal with Google for 1.2 gigawatts worth of projects earlier this year), utility Entergy (which is Google’s partner for $4 billion worth of projects in Arkansas), Kansas-based utility Evergy (which is working on a data center project in Kansas City with Google), and Wisconsin-based utility Alliant (which is working on data center projects with Google in Iowa).
If getting power for its data centers keeps Pichai up at night, there’s no lack of utility executives willing to answer his calls.
Current conditions: The snow squalls and cold air headed from the Ohio Valley to the Northeast are coming with winds of up to 55 miles per hour • A “western disturbance,” an extratropical storm that originates in the Mediterranean and travels eastward, is set to arrive in India and bring heavy snow to the Himalayas • Tropical Storm Basyang made landfall over the Philippines this morning, forcing Cebu City to cancel all in-person classes for public school students.
Vice President JD Vance delivered a 40-minute speech Wednesday appealing to 54 countries and the European Union to join a trading alliance led by the United States to establish a supply of critical minerals that could meaningfully rival China. The agreement would create a “preferential trade zone” meant to be “protected from disruptions through enforceable price floors.” The effort comes in response to years of export controls from Beijing that have sent the prices of key minerals over which China has near monopolies skyrocketing. “This morning, the Trump administration is proposing a concrete mechanism to return the global critical minerals market to a healthier, more competitive state,” Vance said at the State Department’s inaugural Critical Minerals Ministerial in Washington.
Under the Biden administration, the U.S. attempted to coordinate a network of trading partners, to make up for the minerals American mines no longer produced. The Treasury Department allowed automakers that sourced battery minerals to countries with which the U.S. had a free trade agreement to benefit from the most valuable version of the landmark electric vehicle tax credit reserved for power packs made with domestically-sourced metals. The White House worked with Republicans in Congress to eliminate the tax credit last year, demonstrating what Heatmap’s Matthew Zeitlin referred to as the “paradox” of Trump’s push for more domestic mining: A push to increase supply while eliminating one of the biggest sources of demand. The on-again, off-again tariff wars with allies haven’t done much to rally the spirit of camaraderie among America’s traditional trade partners either. Since then, as I have covered repeatedly in this newsletter, Trump has gone on a shopping spree for equity stakes in mining companies, shelled out grants through the military to mineral startups, and, most recently, created a $12 billion federal stockpile. Yet it’s come with plenty of missteps, as a former Department of Energy official told our colleague Robinson Meyer in his latest Shift Key podcast. Still, Congress is backing up the mining push. The House voted 224-195 Wednesday to approve legislation meant to speed up mining on federal lands.
Despite President Donald Trump’s threats to eliminate its funding, Congress has spared the long-running federal program that helps low-income Americans pay for heating and electric bills. The budget deal the president signed Tuesday to fund most federal agencies through September added $20 million to the Low Income Energy Assistance Program, bringing the total funding to just over $4 billion. It’s a full reversal of Trump’s position in May, when the administration asked Congress to completely eliminate the funding, Utility Dive reported. A second appropriations package Trump signed last month also included a small increase in funding for a separate program that subsidizes weatherization projects and other energy efficiency renovations for low- and moderate-income households.

Last week, I told you about copper prices soaring to a record — and seemingly unsustainable — high. While Goldman Sachs analysts expected the price for the metal needed for virtually anything electric to fall, it was still forecast to level off well above the average for the past few years. Well, that’s good news José Antonio Kast, the far-right leader scheduled to be inaugurated president of Chile next month. His incoming finance minister told the Financial Times the government plans to deliver economic growth rates of 4% and balance the country’s budget by 2029. If that proves possible, it’s only because Chile is the world’s largest producer of the red metal.
The U.S., meanwhile, is seeing early fruits of its global mineral diplomacy. The federal government’s International Development Finance Corporation said Wednesday that a U.S.-backed venture will begin shipping 50,000 tons of copper from the Democratic Republic of the Congo to Saudi Arabia and the United Arab Emirates. The export package comes a month after the same Congolese project pledged to send 100,000 tons to the U.S. The lending agency’s chief executive, Ben Black, said the partnership between Washington and Kinshasa “ensures valuable critical minerals are directed to the U.S. and our allies.”
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Newcleo, the best-known European nuclear startup promising to build fourth-generation small modular reactors, just netted $85 million in its latest financing round, bringing its total fundraising for the past 12 months to more than $125 million. The financing round includes venture funds Kairos and Indaco Ventures, asset manager Azimut Investments, the CERN pension fund, and industrial giants such as steelmaker Danieli, concrete manufacturer Cementir Holding, and components producers such as Walter Tosto and Orion Valves. The money will “accelerate our expansion into the U.S.,” a nascent effort that has included brokering a partnership with fellow next-generation reactor startup Oklo. Unlike the California company, whose microreactor design uses liquid sodium instead of water as a coolant, Paris-based Newcleo has proposed building a lead-cooled unit. The design has already gained approval in the United Kingdom. “Our ability to deliver impactful low-carbon energy solutions for energy-intensive firms is proving an attractive investment rationale for both industrial and financial investors,” said Newcleo CEO Stefano Buono.
Last week, I told you about the trouble brewing for the controversial wood-pellet giant Drax, which built its business on government subsidies predicated on the idea that burning felled trees for electricity could somehow provide a low-carbon alternative to fossil fuels. Facing overdue scrutiny of its green credentials, the British company had hoped Japan, the world’s No. 2 importer of wood pellets, would provide a growth market. But Tokyo indicated it’s cutting off the subsidy spigot. Then, two days ago, I told you that a former Drax employee admitted the company misled the public when claiming it wasn’t felling old-growth trees to make its wood pellets. Now the union that represents its British workers, Unite, has blasted Drax for the “shameful betrayal” of threatening to cut as many as 350 jobs. That could total up to 10% of the workforce. “It is shameful that a firm making billions such as Drax is choosing to target its staff,” Sharon Graham, Unite’s general secretary, said, according to Energy Voice. “It is morally wrong that workers, their families, and local communities pay the price for corporate greed.”
Over at The Washington Post, billionaire owner Jeff Bezos’ management team just gutted the newspaper's Pulitzer Prize-winning climate desk. The paper sent layoff notices to at least 14 climate journalists, newsroom sources told veteran beat reporter Sammy Roth for his Climate-Colored Goggles newsletter. The pink slips included eight writers and reporters, an editor, and several video, data, and graphics journalists. I’ll echo Sammy’s sentiment with the highest compliment I can give: I was routinely jealous of the top-notch reporting the climate team published at the Post. Losing that nuanced, complex reporting, at this particular juncture in the history of our nation and our atmosphere, is devastating. It’s also infuriating when you read the back-of-the-napkin math New York Times reporter Peter Baker posted on X yesterday: “Last reported annual losses of Post: $100 million,” he wrote. “Number of years Bezos could absorb those losses with what he makes in a single week: 5.”
Take a guess who wrote this on X yesterday morning: “Solar energy is the energy of the future. Giant fusion reactor up there in the sky — we must rapidly expand solar to compete with China.” Go ahead, I’ll wait. Whomever you were going to name, you’re probably wrong. The answer, astonishingly, is Katie Miller, the right-wing influencer wife of top Trump adviser Stephen Miller. A regular feature of White House social media content, Katie Miller posted her praise for an industry her husband’s boss has done much to stymie in response to an Axios article on a poll that found strong support for solar among GOP voters. The survey, commissioned by the panel manufacturer First Solar, comes as the solar industry says that the administration is throttling its permitting. While Trump seems unlikely to let up on wind, it could be a sign of a brighter future for America’s fastest-growing source of electricity.
Microreactor maker Antares Nuclear just struck a deal with BWX Technologies to produce TRISO.
Long before the infamous trio of accidents at Three Mile Island, Chernobyl, and Fukushima, nuclear scientists started working on a new type of fuel that would make a meltdown nearly impossible. The result was “tri-structural isotropic” fuel, better known as TRISO.
The fuel encased enriched uranium kernels in three layers of ceramic coating designed to absorb the super hot, highly radioactive waste byproducts that form during the atom-splitting process. In theory, these poppyseed-sized pellets could have negated the need for the giant concrete containment vessels that cordon off reactors from the outside world. But TRISO was expensive to produce, and by the 1960s, the cheaper low-enriched uranium had proved reliable enough to become the industry standard around the globe.
TRISO had another upside, however. The cladding protected the nuclear material from reaching temperatures high enough that could risk a meltdown. That meant reactors using them could safely operate at hotter temperatures. When the United States opened its first commercial high-temperature gas-cooled reactor in 1979, barely three months after Three Mile Island, the Fort St. Vrain Generating Station in Colorado ran on TRISO. It was a short-lived experiment. After a decade, the high cost of the fuel and the technical challenges of operating the lone commercial atomic station in the U.S. that didn’t use water as a coolant forced Fort St. Vrain to close. TRISO joined the long list of nuclear technologies that worked, but didn’t pencil out on paper.
Now it’s poised for a comeback. X-energy, the nuclear startup backed by Amazon that plans to cool its 80-megawatt microreactors with helium, is building out a production line to produce its own TRISO fuel in hopes of generating both electricity for data centers and heat as hot as 1,400 degrees Fahrenheit for Dow Chemical’s petrochemical facilities. Kairos Power, the Google-backed rival with the country’s only deal to sell power from a fourth-generation nuclear technology — reactors designed to use coolants other than water — to a utility, is procuring TRISO for its molten fluoride salt-cooled microreactors, which are expected to generate 75 megawatts of electricity and reach temperatures above 1,200 degrees.
Then there’s Antares Nuclear. The California-based startup is designing 1-megawatt reactors cooled through sodium pipes that conduct heat away from the atom-splitting core. On Thursday, the company is set to announce a deal with the U.S. government-backed nuclear fuel enricher BWX Technologies to establish a new production line for TRISO to fuel Antares reactors, Heatmap has learned exclusively.
Unlike X-energy or Kairos, Antares isn’t looking to sell electricity to utilities and server farms. Instead, the customers the company has in mind are the types for whom the price of fuel is secondary to how well it functions under extraordinary conditions.
“We’re putting nuclear power in space,” Jordan Bramble, Antares’ chief executive, told me from his office outside Los Angeles.
Just last month, NASA and the Department of Energy announced plans to develop a nuclear power plant on the moon by the end of the decade. The U.S. military, meanwhile, is seeking microreactors that can free remote bases and outposts from the tricky, expensive task of maintaining fossil fuel supply chains. Antares wants to compete for contracts with both agencies.
“It’s a market where cost matters, but cost is not the north star,” Bramble said.
Unlike utilities, he said, “you’re not thinking of cost solely in terms of fuel cycle, but you’re thinking of cost holistically at the system level.” In other words, TRISO may never come as cheap as traditional fuel, but something that operates safely and reliably in extreme conditions ends up paying for itself over time with spacecrafts and missile-defense systems that work as planned and don’t require replacement.
That’s a familiar market for BWXT. The company — spun out in 2015 from Babcock and Wilcox, the reactor developer that built more than half a dozen nuclear plants for the U.S. during the 20th century — already enriches the bulk of the fuel for the U.S. military’s fleet of nuclear submarines, granting BWXT the industry’s highest-possible security clearance to work on federal contracts.
But BWXT, already the country’s leading producer of TRISO, sees an even wider market for the fuel.
“The value is that it allows you to operate at really high temperatures where you get high efficiencies,” Joseph Miller, BWXT’s president of government operations, told me. “We already have a lot of customer intrigue from the mining industry. I can see the same thing for synthetic fuels and desalination.”
BWXT isn’t alone in producing TRISO. Last month, the startup Standard Nuclear raised $140 million in a Series A round to build out its supply chain for producing TRISO. X-energy is establishing its own production line through a subsidiary called TRISO-X. And that’s just in the U.S. Russia’s state-owned nuclear company, Rosatom, is ramping up production of TRISO. China, which operates the world’s only commercial high-temperature gas-cooled reactor at the moment, also generates its own TRISO fuel.
Beijing’s plans for a second reactor based on that fourth-generation design could indicate a problem for the U.S. market: TRISO may work better in larger reactors, and America is only going for micro-scale units.
The world-leading high-temperature gas reactor China debuted in December 2023 maxes out at 210 megawatts of electricity. But the second high-temperature gas reactor under development is more than three times as powerful, with a capacity of 660 megawatts. At that size, the ultra-high temperatures a gas reactor can reach mean it takes longer for the coolant — such as the helium used at Fort St. Vrain — to remove heat. As a result, “you need this robust fuel form that releases very little radioactivity during normal operation and in accident conditions,” Koroush Shirvan, a researcher who studies advanced nuclear technologies at the Massachusetts Institute of Technology, told me.
But microreactors cool down faster because there’s less fuel undergoing fission in the core. “Once you get below a certain power level,” Shrivan said, “why would you have [TRISO]?”
Given the military and space applications Antares is targeting, however, where the added safety and functionality of TRISO merits the higher cost associated with using it, the company has a better use case than some of its rivals, Shrivan added.
David Petti, a former federal researcher who is one of the leading U.S. experts on TRISO, told me that when the government was testing TRISO for demonstration reactors, the price was at least double that of traditional reactor fuel. “That’s probably the best you could do,” he said in reference to the cost differential.
There are other uranium blends inside the TRISO pellets that could prove more efficient. The Chinese, for example, use uranium dioxide, essentially just an encased version of traditional reactor fuel. The U.S., by contrast, uses uranium oxycarbide, which allows for increased temperatures and higher burnups of the enriched fuel. Another option, which Bramble said he envisions Antares using in the future, would be uranium nitride, which has a greater density of fuel and could therefore last longer in smaller reactors used in space.
“But it’s not as tested in a TRISO system,” Petti said, noting that the federal research program that bolstered the TRISO efforts going on now started in 2002. “Until I see a good test that it’s good, the time and effort it takes to qualify is complicated.”
Since the uranium in TRISO is typically enriched to higher levels than standard fuel, BWXT’s facilities are subject to stricter safety rules, which adds “significant overhead,” Petti said.
“When you make a lot of fuel per year in your fuel factory, you can spread that cost and you can get a number that may be economic,” he said. “When you have small microreactors, you’re not producing an awful lot. You have to take that cost and charge it to the customer.”
BWXT is bullish on the potential for its customer base to grow significantly in the coming years. The company is negotiating a deal with the government of Wyoming to open a new factory there entirely dedicated to TRISO production. While he wouldn’t give specifics just yet, Miller told me BWXT is developing new technologies that can make TRISO production cheaper. He compared the cost curve to that of microchips, an industry in which he previously worked.
“Semiconductors were super expensive to manufacture. They were almost cost prohibitive,” Miller said. “But the cost curve starts to drop rapidly when you fully understand the manufacturing process and you know how to integrate the understanding into operational improvements.”
He leaned back in his chair on our Zoom call, and cracked a smile. “Frankly,” he said, “I feel more confident every day that we’re going to get a really, really cost driven formula on how to manufacture TRISO.”