Nuclear Fission
Reactor design advances, safety milestones, fuel technology, and construction progress in nuclear fission power.
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Army’s Janus Program Sends Nuclear Microreactors to 5 US Bases
The US Army just moved nuclear microreactors from the lab to the field. On August 26, 2026, the Army named five companies to build Army nuclear microreactors under a new initiative called the Janus Program. The deal puts up to $2.2 billion in government funding behind five different reactor designs. It marks a real shift:…
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NuCube Heat Pipe Reactor Gets Key Safety Validation
NuCube Energy just took a real step toward putting a pump-free nuclear reactor into commercial service. On August 25, 2026, the company announced a research partnership with Canadian Nuclear Laboratories (CNL). The goal: validate the NuCube heat pipe reactor’s core technology, a cooling system that moves heat without a single moving part. That distinction matters…
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RITM-200 Reactor Design Cuts Nuclear Leak Risk
Two RITM-200 reactors just went into the hull of a Russian icebreaker. That’s not big global energy news on its own. But the RITM-200 reactor design behind it solves a problem that has slowed nuclear power for decades. How do you make a reactor small, sturdy, and safe enough to put almost anywhere? Workers at…
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Kaleidos Microreactor Testing Kicks Off at Idaho National Lab
Radiant Nuclear just moved a full working reactor 1,000 miles by truck, and that drive matters more than it sounds. On August 12, the company hauled its Kaleidos unit from El Segundo, California to Idaho National Laboratory, kicking off Kaleidos microreactor testing that could reshape how fast the nuclear industry gets power to remote sites.…
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Haiyang 3 Nuclear Reactor Clears Key Safety Milestone
The Haiyang 3 nuclear reactor just passed one of the toughest checkpoints in nuclear construction: hot functional testing. Engineers on China’s Shandong coast ran the entire plant through real operating pressures and temperatures, without any nuclear fuel loaded, and every system held up. That distinction matters. Hot testing exposes flaws that cold testing can’t catch,…
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TerraPower Natrium Reactor Gets Key Component Deal from Doosan Enerbility
TerraPower just moved its Natrium reactor closer to operation. On August 21, South Korea’s Doosan Enerbility signed a contract to manufacture core reactor components for the TerraPower Natrium reactor going up in Kemmerer, Wyoming. The deal covers the core barrel, the guard vessel, and the internal supports that hold the reactor’s core in place, according…
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The State of Nuclear Fuel Supply in 2026
Nuclear fission’s growth in 2026 has had less to do with reactor breakthroughs than with something far less glamorous: the nuclear fuel supply chain that has to catch up before any of those reactors can actually run. Across just the past few days, three very different fuel stories and one reactor-safety story have landed —…
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Standard Nuclear Locks In Multi-Year TRISO Fuel Supply for Radiant’s Kaleidos Microreactor
A new TRISO fuel microreactor supply deal just addressed one of the most stubborn obstacles standing between advanced reactor designs and real-world deployment: actually getting the fuel to run them. Standard Nuclear, the only U.S. company producing TRISO fuel at industrial scale, has signed a binding long-term supply agreement with Radiant Industries covering multiple metric…
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Thorium ANEEL Fuel Clears a Key Test Toward Reactor Upgrades
Most conversations about advancing nuclear fission jump straight to new reactors. But there is a quieter, arguably faster path to better fission: change what goes inside the reactors that already exist. That is exactly the bet behind thorium ANEEL fuel, a thorium-based fuel from Clean Core Thorium Energy that just took a meaningful step toward…
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Urenco Breaks Ground on a 50% Bigger US Enrichment Plant
Urenco USA has started building 2.1 million SWU of new uranium enrichment capacity in New Mexico, easing the fuel-supply bottleneck on fission deployment.