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Aalo Atomics brought a commercial-scale advanced reactor to initial criticality on July 4, 2026 at 12:20 AM (MT). This means the President’s goal of at least three criticalities by July 4 has been surpassed, making "4 by the 4th" a reality. Read more ⬇️

114,908 görüntüleme • 1 ay önce •via X (Twitter)

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We’ve gone critical. At 12:20 am on July 4th, Aalo sustained a controlled fission chain reaction for the first time. We have officially surpassed the goal of President Trump’s Executive Order 14301, achieving 4 advanced nuclear reactor criticalities by America’s 250th birthday. This is a zero-power criticality to validate our supply chain, reactor physics and control systems for our 10 MWe full-powered reactor, the Aalo-X, targeting power operations next year. Everything was built at full scale: fuel, moderator, control systems, etc., so we understand system performance at its commercial scope. That also meant tackling four of the most difficult things in nuclear with this criticality milestone: ✅ Ground-up construction of our reactor facility ✅ Manufacturing the reactor in our factory and shipping them by road ✅ Assembling our own fuel assemblies using commercial UO2 ✅ Standing up training, safety, and operational programs to become our own nuclear operator I am proud to say we have accomplished all four goals, along with achieving criticality. The reactor building was constructed in 36 days and construction to criticality was achieved in under 8 months. That’s the fastest nuclear build in the last 80 years. A massive congratulations to the Aalo Atomics team and our partners. Many thanks to Idaho National Laboratory, the DOE-Idaho Operations Office, and the Office of Nuclear Energy for their immense support in enabling this milestone and dedicated to the American nuclear resurgence.

Yasir Arafat

99,621 görüntüleme • 1 ay önce

Very excited to announce that at 12:20am on the 4th of July, Aalo achieved criticality on our first full-scale reactor. We cut it close, but we pulled it off!! Working towards this goal with such an incredible group of humans has been the most fulfilling period of my life. This moment has been three years in the making. Last year, Executive Order 14301 called for at least three new reactors to go critical before July 4th, 2026. As of late last Friday night, that goal has been surpassed! When the EO was announced, we immediately sat down to figure out what the most ambitious scope would be, while still being potentially achievable by July 4th. Some of the team proposed doing simplified designs with smaller fuel loads, or building in existing facilities. One thing was clear: We wouldn't have time to integrate a full-scale sodium heat-removal loop to bring the reactor to its full 30 MWt. So here’s where we landed: ➡️ We purchased the entire commercial-scale fuel load. This is enough fuel to operate at 30 MWt / 10 MWe for 3 years before refueling. To my knowledge, it’s the largest fuel load that’s been taken critical in the DOE pilot program, by far. ➡️ We built a full-scale reactor vessel in our factory, and loaded in our commercial graphite layout. All the dimensions, vessel thickness, and manufacturing techniques are essentially the same as we will use for the imminent commercial version. There will be a few minor tweaks for sodium flow and full-power, but nothing major. ➡️ We built an entirely new reactor facility at the Idaho National Lab. Building a building is easy. Building a new reactor facility comes with a mountain of paperwork, policies, operation and training procedures, security, instrumentation and control, and more. Zero-power criticality might seem like a small step, but I can tell you, going through the exercise of building a reactor and taking it to criticality has been extremely valuable. The learnings on regulatory, ops, manufacturing, supply chain, QA, economics, engineering, and design will accelerate our path through to the final iteration at full-power. America is blessed to have a recent Cambrian explosion of startups in nuclear, all going after different markets, technologies, and strategies. I’m excited that sodium, gas, salt, and new PWRs are all getting pushed forward once again. The best outcome for humanity is to have all these advance in parallel, as quickly as possible, while maintaining safety. Thanks again to our amazing team, DOE, INL, BEA, and everyone else who helped us get to where we are today. This could not have happened anywhere else. Happy birthday, America!! 🇺🇸🇺🇸🇺🇸 There has never been a better time for nuclear energy. The Second Atomic Age has begun, and this one will be here to stay.

Matt Loszak | Aalo Atomics

473,454 görüntüleme • 1 ay önce

One year ago today, President Trump signed the Nuclear Executive Orders. The charge: three reactors critical by America's 250th birthday. It sounded impossible. In 12 months, here's what Aalo Atomics did : → May: EOs signed → June: DOE stands up the Reactor Pilot Program → July: Aalo submits → August: Selected as 1 of 11 → September: Landmark OTA signed → October: PDR complete → November: Ground broken → December: Key suppliers signed → January: FDR complete → February: Building done → March: Reactor manufactured, PDSA approved → April: DSA approved, fuel on INL site → May: Reactor installed, commissioned This week we finished fuel mockup trials. We are headed to criticality by July 4th. It will be tight. But in the next few weeks, multiple American companies, Aalo among them, will get there. To our team at Aalo: you built something the industry said couldn't be built, at a speed it said couldn't be moved. I am in awe of you every day. To our partners at Office of Nuclear Energy | US Department of Energy and DOE-ID: thank you for reforming what slowed us down and protecting what keeps us safe. And to the other teams in the RPP: we know what you've poured into this. We've felt every ounce of it ourselves. You are building real things. You are making history. Congratulations on getting this far, and Godspeed for the final stretch. A year ago this was an executive order. In a few weeks, it will be multiple new reactors going critical on American soil. Happy anniversary. 🇺🇸

Yasir Arafat

14,400 görüntüleme • 3 ay önce