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“This is what you’d expect from China,” a veteran mining industry lobbyist told Heatmap.

President Donald Trump is chasing a new American mining boom. In the process, he’s making quick bets on projects that haven’t completed routine financial analyses or would be situated in environmentally sensitive areas with significant legal risk — and occasionally both at the same time.
In March, Trump issued an executive order that changed the landscape of American mining for the foreseeable future, commanding agencies to approve permits for individual mines as quickly as possible and requesting government funds go toward domestic mining. The Interior Department has also taken strides to hasten the environmental review process for mining on federal lands, asserting that it will complete comprehensive analyses in less than 30 days, a truncated time-table the likes of which mining industry lobbyists have long sought.
So far in his second term as president, Trump’s administration has claimed to have approved, expedited, or publicly endorsed at least 28 different mines and mineral exploration projects, according to a review of Bureau of Land Management notices and federal permitting databases, with more likely in the offing. Many of these projects may very well produce minerals required for key energy or defense purposes, and some of them are guaranteed to do so. But at least a few have not yet been proven to be economically viable in the way investors typically expect from mining companies.
Conservationists have decried these actions as an unnecessary risk to sensitive landscapes, which could be irrevocably changed without a guarantee of improved energy security. And even some in the mining industry are quietly noting these examples, saying they could represent a paradigm shift in how America treats the mining industry.
“This is what you’d expect from China,” a former veteran mining industry lobbyist told me, requesting anonymity to protect their current business from retribution. “The U.S. prides itself on mines that are good neighbors. The U.S. doesn’t have a perfect record, but those are things that it values.”
“I’m not saying the companies are going to do something wrong here,” the source continued, “but we don’t know that.”
The most headline-grabbing example of this rush to permit came last week, when the Interior Department said it would fast-track the permitting of a large uranium mine in Utah known as Velvet-Wood. The department said it would complete Velvet-Wood’s environmental review within two weeks — a process that has historically taken years.
On first blush, abbreviating the approval process for a mine that will produce energy fuel for nuclear power plants resembles the sort of permitting reform that climate hawks and centrist policy wonks have craved for years. Velvet-Wood’s developer, Anfield Energy, claims the site will also produce vanadium, a strategic mineral used in defense-grade steel.
A deeper examination, however, exposes signs of haste that go beyond all deliberate speed.
Ordinarily, mines take years to develop for reasons wholly unrelated to the federal permitting process. Usually a project requires years of exploration and study to verify that the area where digging will happen holds proven “resources” and then “reserves.” Think of resources vs. reserves as the difference between lukewarm and high levels of confidence that minerals are not only present but also economic to mine and process. It is unusual for any mine to be built without proven resources, let alone reserves, and feasibility studies are the way companies usually communicate that level of proof to investors. These studies have also been a primary mode of conveying a project’s value and design to the government.
Until our present policy moment, the permitting process was so lengthy that it made little sense to pursue it without first giving investors the certainty brought by a feasibility study. Anfield and other companies appear to have found a work-around to demonstrate that certainty, however, at least to the government: Asking to dig in places where mines used to be decades ago.
Anfield has not yet completed a feasibility study for Velvet-Wood, which would include the site of a former underground uranium mine. The most recent study of the project was a 2023 “preliminary economic assessment” that documented some of the old mining infrastructure and otherwise largely referenced historical data about mineralization. The company stated in the report that the study was “too speculative geologically to have economic considerations applied to them,” and that “there is no certainty that the preliminary economic assessment will be realized.”
In Anfield’s own press release announcing the Trump administration’s decision to quickly permit the project, the company states that it “has not done sufficient work to classify these historic estimates” for uranium and vanadium at the site. Anfield did not respond to requests for comment on why the company requested government permits before finishing a feasibility study.
Under the Velvet-Wood deposit’s previous owner, Russian mining company Uranium One, a draft feasibility study did find economically viable uranium. But that study is more than a decade old and was not made public, according to press materials at the time.
In order to become operational, Anfield expected to have to update the decades-old plan of operations for Velvet-Wood, according to the 2023 economic assessment, which also said BLM would need to take into account the impacts of restarting a formerly operational mine, as well as mining in areas that have not previously been mined before. That’s quite a lot of work to complete in only two weeks. While it’s possible that staff at Interior got a head start on their review when Anfield submitted its mine plan last year, they have not confirmed anything to that effect since the department’s announcement about permitting the project.
Aaron Mintzes, senior policy counsel for the mining reform advocacy group Earthworks, told me the practice of approving a mine before feasibility studies have been done carries the risk of painting a misleading portrait to investors about a project’s viability.
“Every mining company does this. All of them. If you’re a publicly traded mining company and you want investors to give your mine money, you must provide a feasibility study. That’s how you know they’re telling the truth,” Mintzes said of this approach. “Investors should be upset about this.”
In an email, BLM press secretary Brian Hires told me that “feasibility studies are not legally required by BLM for mining projects.”
“The BLM continues to ensure appropriate environmental oversight including coordination with other agencies, balancing mineral development rights and responsible public lands management,” Hires stated.
On Velvet-Wood, Hires said the agency acted under “recently established emergency procedures” created under the Trump administration to quickly approve new resource projects. “The expedited review is expected to significantly contribute to meeting urgent energy demands and addressing key threats to national energy security.”
Velvet-Wood is not the first mine Trump’s Interior Department has expedited so early in the approval process.
On April 8, the Trump administration gave Dateline Resources, an Australian company, a green light to build a large mine inside of the Mojave National Preserve. Like Velvet-Wood, the project, known as Colosseum, got this approval without a feasibility study. Colosseum would be a gold mine, according to Dateline’s website, which also states that the project is “prospective” for producing rare earth elements as a byproduct. The company cites previous radiomagnetic reviews by the U.S. Geological Survey and the project’s proximity of roughly 8 kilometers — or about 6 miles — from an operating rare earths mine, Mountain Pass. The company also cites decades-old information about the site from when it used to be an operating gold mine in the 1970s and 1980s.
Are there rare earths at the Colosseum dig site? There may be — but how much and how commercially useful they’d be are normally determined through a feasibility study process.
BLM approved Colosseum without any new environmental review, or at least nothing that was public at the time it made the decision known. Instead, it said in a five-sentence press statement that Dateline could rely entirely on a construction and operations plan from the previous mine, which shut down in the 1990s.
BLM’s press release also referred to Colosseum as a rare earths mine, with no mention of gold.
“For too long, the United States has depended on foreign adversaries like China for rare earth elements for technologies that are vital to our national security,” the release stated. “By recognizing the mine’s continued right to extract and explore rare earth elements, Interior continues to support industries that boost the nation’s economy and protect national security.”
Hires, the BLM press secretary, told me that the agency made this claim to highlight “the project’s potential to produce rare earth elements, which are required for economic and national security.”
On April 21, investors were informed that a “bankable feasibility study” was now “underway.” But that didn’t stop Trump from jumping far ahead of the usual process a few days later, publicly calling the project “America’s second rare earths mine” on Truth Social.
There’s a big reason this area stopped being mined, by the way: According to the National Park Conservation Association, the area is heavily restricted from mineral development under a law Congress passed in the early 1990s, the California Desert Protection Act.
There is a separate law that provides companies the ability to mine in national preserves and parks under very specific and limited conditions, and with the approval of the National Park Service, the association told me. Kelly Shapiro, an attorney representing Dateline, told E&E News in a story published last week that Interior told the company its mine plan of operations was “valid.” Shapiro also told the news outlet that “rare earths have been found at the Colosseum mine site.”
Dateline has now begun work at the mine site and conservation activists are sounding public alarms. The company did not respond to requests for comment.
Asked why BLM gave Colosseum the right to construct a new operating mine, Hires said the project site, which has not been active for decades, “is not a new mine.” He said the facility was granted the “right” to “continue mining operations” under the plan from when the site was active in the 1980s, which the agency said “includes exploration for rare earth minerals.”
Before I came to Heatmap, I spent years writing about the mining industry. One of the stories I’m proudest of was an investigation into the amount of mining needed to build the vastly different energy and transportation systems we’ll need to fully decarbonize. So I can safely say this: We truly will need more minerals like lithium, copper, nickel, graphite and cobalt to decarbonize, and we might need to open more mines to get them, although recycling and technological innovation could easily reduce the tonnage required over time.
The Trump team has a different argument for mining this much. It says our country needs to wean off foreign sources of metals because relying on imports is a weakness in the eyes of hawkish security experts.
For the past decade, U.S. policymakers of both parties have rallied behind the basic notion that the country should stop relying as much on minerals from nations considered to be adversaries by the national defense apparatus, including China and Russia, as well as companies perceived to be substantially controlled by those nations. The idea first gained traction under Trump 1.0, leading to the creation of a list of so-called “critical minerals” that the military and domestically essential businesses rely on but are generally mined or refined in other countries.
Under Joe Biden, the “critical mineral” concept was magnified by multiple signature laws, including the 2021 infrastructure law and the 2022 Inflation Reduction Act, which together established large grant and tax credit programs intended to stimulate a new American mining economy.
Trump has sped up the federal permitting process for some copper, nickel, and lithium mining and exploration projects. These commodities markets are ones in which China genuinely has an outsized influence, per national security experts, through market share and existing business relationships held by Chinese state-owned mining and refining companies.
Some of these U.S. mining projects likely would’ve been permitted no matter the outcome of last year’s election, either because their environmental impacts would be relatively limited or because they’d produce metals crucial for the energy transition that a Democrat-led government would have supported as a trade-off. Take South32’s Hermosa copper mine in Arizona, which the Biden administration fast-tracked and Trump 2.0 has signaled it will approve. A handful of these mines would supply a meaningful amount of defense minerals for which we currently rely on China, such as the Stibnite gold mine in Idaho, which would yield antimony for military-grade ammo as a byproduct.
Then there are special cases like the Resolution copper mine in Arizona, where the government’s hands are essentially tied under federal legal requirements to approve the conveyance of land to a mining company.
Other “transition metal” mining projects fast-tracked or endorsed by Trump 2.0, however, likely would not have been given priority — or even a second look — under a more neutral federal regulator. That’s because they are located in areas that officials under previous administrations fretted would produce outsized pollution risk and potentially run afoul of environmental laws.
Take for example the NewRange copper mine in Minnesota, which the company says would be the state’s only active copper mine if approved and constructed. NewRange is better known in the mining industry as PolyMet, which was its moniker for most of the nearly two decades it has been in the works. NewRange/PolyMet has struggled to get requisite permits, to the point of being referred to by its opponents as a “zombie” project, because it’s situated in an especially porous area of northern Minnesota covered in protected wetlands.
In 2022, the Environmental Protection Agency under Biden said the Army Corps of Engineers should rescind a water permit issued under Trump 1.0 because the project would violate the pollution standards of the Fond du Lac Tribe, which relies on the wet ecosystem to cultivate wild rice for subsistence and cultural practices.
At the beginning of May, the Trump administration added NewRange/PolyMet to a federal “transparency” dashboard that it says will soon have a timetable for approving the project under the same authority it fast-tracked Resolution. Representative Pete Stauber of Minnesota, whose congressional district includes the mining project, reacted in a statement that said the designation shows Trump “understands the vital importance of this project,” and that he looks forward to “seeing NewRange meet and exceed every permitting standard in a timely manner.”
This is an example of mine that, if approved hastily, would probably create new litigation just as fast.
At the risk of repeating myself, it’s not the only example of such a case, and there are more examples where the Trump administration has opened the door to new, legally risky directions on a mine.
Most notable in that pile is the Pebble mine in Alaska, which Trump halted during his first term but may be given what appears to be a last shot at survival under his new government. Decades of battle between a would-be gold mine and the denizens of Bristol Bay have dominated conversations around American mining. Opponents across the political spectrum have tried to stop the project because they fear construction would pollute the bay and its world-class fishing grounds.
The first Trump administration actually opposed Pebble after a private lobbying campaign by Donald Trump, Jr. and other conservative conservation advocates. Under Biden, the EPA issued a rare veto of the project area under a provision of the Clean Water Act. This was a step beyond simply rejecting the permit as it would, in the view of advocates, be a permanent restriction against development.
In February, the Trump 2.0 Justice Department requested a stay on the federal lawsuit filed against the veto by Pebble’s developer, Northern Dynasty Minerals, alongside top political leaders in the state of Alaska, who have argued that the agency overstepped its authority. On Wednesday, Justice Department attorneys filed a status report asking that the stay be extended for at least another month because while officials had been briefed on the subject, they “require additional time to determine how they wish to proceed.”
This indicates the government is still not ready to state its position, and leaves open a door for the Justice Department to flip sides. Northern Dynasty Minerals hopes a flip will happen. “This is an important position in any negotiation between a project proponent and a regulator, and for a process that could, hopefully, remove the veto and re-start the permitting process,” the company’s CEO Ron Thiessen said in a public statement made after the stay extension request.
It may be that even Pebble Mine is a bridge too far for Trump 2.0. But after all these other projects have gotten the skids greased, we must all wait with bated breath for the next shoe — er, pebble — to drop.
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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.”
The startup — founded by the former head of Tesla Energy — is trying to solve a fundamental coordination problem on the grid.
The concept of virtual power plants has been kicking around for decades. Coordinating a network of distributed energy resources — think solar panels, batteries, and smart appliances — to operate like a single power plant upends our notion of what grid-scale electricity generation can look like, not to mention the role individual consumers can play. But the idea only began taking slow, stuttering steps from theory to practice once homeowners started pairing rooftop solar with home batteries in the past decade.
Now, enthusiasm is accelerating as extreme weather, electricity load growth, and increased renewables penetration are straining the grid and interconnection queue. And the money is starting to pour in. Today, home battery manufacturer and VPP software company Lunar Energy announced $232 million in new funding — a $102 million Series D round, plus a previously unannounced $130 million Series C — to help deploy its integrated hardware and software systems across the U.S.
The company’s CEO, Kunal Girotra, founded Lunar Energy in the summer of 2020 after leaving his job as head of Tesla Energy, which makes the Tesla Powerwall battery for homeowners and the Megapack for grid-scale storage. As he put it, back then, “everybody was focused on either building the next best electric car or solving problems for the grid at a centralized level.” But he was more interested in what was happening with households as home battery costs were declining. “The vision was, how can we get every home a battery system and with smart software, optimize that for dual benefit for the consumer as well as the grid?”
VPPs work by linking together lots of small energy resources. Most commonly, this includes solar, home batteries, and appliances that can be programmed to adjust their energy usage based on grid conditions. These disparate resources work in concert conducted by software that coordinates when they should charge, discharge, or ramp down their electricity use based on grid needs and electricity prices. So if a network of home batteries all dispatched energy to the grid at once, that would have the same effect as firing up a fossil fuel power plant — just much cleaner.
Lunar’s artificial intelligence-enabled home energy system analyzes customers’ energy use patterns alongside grid and weather conditions. That allows Lunar’s battery to automatically charge and discharge at the most cost-effective times while retaining an adequate supply of backup power. The batteries, which started shipping in California last year, also come integrated with the company’s Gridshare software. Used by energy companies and utilities, Gridshare already manages all of Sunrun’s VPPs, including nearly 130,000 home batteries — most from non-Lunar manufacturers — that can dispatch energy when the grid needs it most.
This accords with Lunar’s broader philosophy, Girotra explained — that its batteries should be interoperable with all grid software, and its Gridshare platform interoperable with all batteries, whether they’re made by Lunar or not. “That’s another differentiator from Tesla or Enphase, who are creating these walled gardens,” he told me. “We believe an Android-like software strategy is necessary for the grid to really prosper.” That should make it easier for utilities to support VPPs in an environment where there are more and more differentiated home batteries and software systems out there.
And yet the real-world impact of VPPs remains limited today. That’s partially due to the main problem Lunar is trying to solve — the technical complexity of coordinating thousands of household-level systems. But there are also regulatory barriers and entrenched utility business models to contend with, since the grid simply wasn’t set up for households to be energy providers as well as consumers.
Girotra is well-versed in the difficulties of this space. When he first started at Tesla a decade ago, he helped kick off what’s widely considered to be the country’s first VPP with Green Mountain Power in Vermont. The forward-looking utility was keen to provide customers with utility-owned Tesla Powerwalls, networking them together to lower peak system demand. But larger VPPs that utilize customer-owned assets and seek to sell energy from residential batteries into wholesale electricity markets — as Lunar wants to do — are a different beast entirely.
Girotra thinks their time has come. “This year and the next five years are going to be big for VPPs,” he told me. The tide started to turn in California last summer, he said, after a successful test of the state’s VPP capacity had over 100,000 residential batteries dispatching more than 500 megawatts of power to the grid for two hours — enough to power about half of San Francisco. This led to a significant reduction in electricity demand during the state’s evening peak, with the VPP behaving just like a traditional power plant.
Armed with this demonstration of potential and its recent influx of cash, Lunar aims to scale its battery fleet, growing from about 2,000 deployed systems today to about 10,000 by year’s end, and “at least doubling” every year after that. Ultimately, the company aims to leverage the popularity of its Gridshare platform to become a market maker, helping to shape the structure of VPP programs — as it’s already doing with the Community Choice Aggregators that it’s partnered with so far in California.
In the meantime, Girotra said Lunar is also involved in lobbying efforts to push state governments and utilities to make it easier for VPPs to participate in the market. “VPPs were always like nuclear fusion, always for the future,” he told me. But especially after last year’s demonstration, he thinks the entire grid ecosystem, from system operators to regulators, are starting to realize that the technology is here today. ”This is not small potatoes anymore.”