Oklo

@oklo • 39,575 subscribers

Oklo is building a new model for delivering clean power, advanced fuel, and reliable isotopes at scale.

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Fast reactor technology is the foundation that connects Oklo's power, fuel, and isotope business lines into one integrated system. Our fast-fission powerhouses provide clean, always-on electricity while enabling practical fuel recycling, which can produce isotopes for medical, industrial, space, and national security applications. Together, these business lines function as one platform that maximizes value across the nuclear lifecycle.

Fast reactor technology is the foundation that connects Oklo's power, fuel, and isotope business lines into one integrated system. Our fast-fission powerhouses provide clean, always-on electricity while enabling practical fuel recycling, which can produce isotopes for medical, industrial, space, and national security applications. Together, these business lines function as one platform that maximizes value across the nuclear lifecycle.

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WE HAVE CRITICALITY! Oklo has completed first criticality at its Groves Isotope Test Reactor. Built in less than a year under the U.S. Department of Energy’s Reactor Pilot Program, Groves offers a concrete blueprint for future advanced nuclear deployment as the fastest fully privately financed and built reactor project of its kind. Today, Oklo proves that advanced reactors can be built, started, and operated faster than anyone thought possible and shows the world that America can build nuclear again.

WE HAVE CRITICALITY! Oklo has completed first criticality at its Groves Isotope Test Reactor. Built in less than a year under the U.S. Department of Energy’s Reactor Pilot Program, Groves offers a concrete blueprint for future advanced nuclear deployment as the fastest fully privately financed and built reactor project of its kind. Today, Oklo proves that advanced reactors can be built, started, and operated faster than anyone thought possible and shows the world that America can build nuclear again.

355,054 views • 1 month ago

We’re beginning our #CountdownToCriticality. As we approach initial criticality, our engineers and operators will take you inside our Groves Isotope Test Reactor as they conduct the startup tests. Our team has loaded the initial core, tested the control rods and protection systems, and brought purified water into the core under tight chemistry control. These steps are a deliberate “preflight check” that builds confidence that the reactor and its systems are behaving as expected. These startup tests do more than demonstrate our developing blueprint for future commercial deployments–they show that American nuclear can move from design to startup on timelines that are measured in months rather than years.

We’re beginning our #CountdownToCriticality. As we approach initial criticality, our engineers and operators will take you inside our Groves Isotope Test Reactor as they conduct the startup tests. Our team has loaded the initial core, tested the control rods and protection systems, and brought purified water into the core under tight chemistry control. These steps are a deliberate “preflight check” that builds confidence that the reactor and its systems are behaving as expected. These startup tests do more than demonstrate our developing blueprint for future commercial deployments–they show that American nuclear can move from design to startup on timelines that are measured in months rather than years.

55,209 views • 1 month ago

Most nuclear fuel is used once. Fuel goes in, energy comes out, and ~95% of the energy remains unused. Fuel recycling changes that. Material is recovered and reused to extract more energy and reduce what’s left to manage. Using more of what we already have by recycling nuclear waste to recharge America.

Most nuclear fuel is used once. Fuel goes in, energy comes out, and ~95% of the energy remains unused. Fuel recycling changes that. Material is recovered and reused to extract more energy and reduce what’s left to manage. Using more of what we already have by recycling nuclear waste to recharge America.

26,514 views • 22 days ago

BIG NEWS: Oklo's Groves isotope test reactor has cleared U.S. Department of Energy's final major safety approval. With the Documented Safety Analysis approved, Groves now enters the final phase before startup, including DOE's readiness review, fuel loading, and criticality in July. Less than a year after breaking ground, Groves is demonstrating that advanced reactors can be built on privately owned land with commercially sourced fuel, equipment, and systems. As the first project to reach this milestone under DOE's Reactor Pilot Program, it provides a blueprint for future commercial deployment. Read more:

BIG NEWS: Oklo's Groves isotope test reactor has cleared U.S. Department of Energy's final major safety approval. With the Documented Safety Analysis approved, Groves now enters the final phase before startup, including DOE's readiness review, fuel loading, and criticality in July. Less than a year after breaking ground, Groves is demonstrating that advanced reactors can be built on privately owned land with commercially sourced fuel, equipment, and systems. As the first project to reach this milestone under DOE's Reactor Pilot Program, it provides a blueprint for future commercial deployment. Read more:

74,065 views • 2 months ago

GREEN LIGHT FOR STARTUP: U.S. Department of Energy has authorized Oklo’s Groves Isotope Test reactor to begin nuclear operations. This startup authorization clears the facility and team to bring in fuel, run startup tests, and proceed toward first criticality under its startup plan. In just over 10 months , Groves completed engineering, construction, commissioning, development of operating programs, personnel training, and DOE readiness across all core requirements. Oklo chose the harder path to build a repeatable deployment model on private land using commercially procured fuel and equipment so future Aurora powerhouses, isotope facilities, and fuel cycle projects can build on proven deployment capabilities instead of starting from scratch. Lessons from Groves are already informing how we build our other capabilities, demonstrating how advanced nuclear can move faster under DOE’s Reactor Pilot Program while keeping safety front and center. Read more ->

GREEN LIGHT FOR STARTUP: U.S. Department of Energy has authorized Oklo’s Groves Isotope Test reactor to begin nuclear operations. This startup authorization clears the facility and team to bring in fuel, run startup tests, and proceed toward first criticality under its startup plan. In just over 10 months , Groves completed engineering, construction, commissioning, development of operating programs, personnel training, and DOE readiness across all core requirements. Oklo chose the harder path to build a repeatable deployment model on private land using commercially procured fuel and equipment so future Aurora powerhouses, isotope facilities, and fuel cycle projects can build on proven deployment capabilities instead of starting from scratch. Lessons from Groves are already informing how we build our other capabilities, demonstrating how advanced nuclear can move faster under DOE’s Reactor Pilot Program while keeping safety front and center. Read more ->

52,007 views • 1 month ago

Reaching criticality at Groves was a major milestone. It was also just the beginning. In less than a year, Oklo built our Groves Isotope Test Reactor from the ground up and brought it to criticality, demonstrating our ability to move from design to operation on a timeline few thought possible. What we learned extends far beyond Groves. The project gave our team hands-on experience across engineering, construction, regulatory execution, startup, and operations that we can apply as we advance projects across power, fuel, and isotopes. Now, we're putting that experience to work as we build toward commercial scale. That includes targeting our first commercial isotope revenue in early 2027 through our NRC-licensed Idaho Radioisotope Laboratory, while advancing our power and fuel projects toward deployment. Groves demonstrated our ability to build, learn, and repeat. Now, we're doing it across the business.

Reaching criticality at Groves was a major milestone. It was also just the beginning. In less than a year, Oklo built our Groves Isotope Test Reactor from the ground up and brought it to criticality, demonstrating our ability to move from design to operation on a timeline few thought possible. What we learned extends far beyond Groves. The project gave our team hands-on experience across engineering, construction, regulatory execution, startup, and operations that we can apply as we advance projects across power, fuel, and isotopes. Now, we're putting that experience to work as we build toward commercial scale. That includes targeting our first commercial isotope revenue in early 2027 through our NRC-licensed Idaho Radioisotope Laboratory, while advancing our power and fuel projects toward deployment. Groves demonstrated our ability to build, learn, and repeat. Now, we're doing it across the business.

15,304 views • 15 days ago

Oklo × Meta Oklo and Meta have signed an agreement to advance the development of a nuclear energy campus in Pike County, Ohio, designed to scale up to 1.2 gigawatts. The agreement includes a binding prepayment to support fuel procurement, enabling Oklo to advance early project work and secure fuel—adding new, clean, reliable power to the grid without shifting infrastructure costs to existing residents or businesses. The project lays the groundwork for multiple Oklo Aurora powerhouses, thousands of construction and long-term jobs, expansion of Ohio’s clean energy workforce, and long-term investment in local and state energy infrastructure.

Oklo × Meta Oklo and Meta have signed an agreement to advance the development of a nuclear energy campus in Pike County, Ohio, designed to scale up to 1.2 gigawatts. The agreement includes a binding prepayment to support fuel procurement, enabling Oklo to advance early project work and secure fuel—adding new, clean, reliable power to the grid without shifting infrastructure costs to existing residents or businesses. The project lays the groundwork for multiple Oklo Aurora powerhouses, thousands of construction and long-term jobs, expansion of Ohio’s clean energy workforce, and long-term investment in local and state energy infrastructure.

136,903 views • 8 months ago

“By all accounts and measures, this is the fastest-built, privately sited, privately funded, privately built nuclear reactor in world history.” Oklo CEO Jacob DeWitte took CBS Austin’s Walt Maciborski inside of the Groves Isotope Test Reactor, just days after reaching criticality. Built in less than a year, Groves serves as the technical and operational foundation for Oklo’s commercial isotope production, which will help restore America’s supply of critical isotopes for applications in medicine, manufacturing, research, national security, space exploration, and beyond. Go inside Groves with CBS Austin:

“By all accounts and measures, this is the fastest-built, privately sited, privately funded, privately built nuclear reactor in world history.” Oklo CEO Jacob DeWitte took CBS Austin’s Walt Maciborski inside of the Groves Isotope Test Reactor, just days after reaching criticality. Built in less than a year, Groves serves as the technical and operational foundation for Oklo’s commercial isotope production, which will help restore America’s supply of critical isotopes for applications in medicine, manufacturing, research, national security, space exploration, and beyond. Go inside Groves with CBS Austin:

27,547 views • 1 month ago

At our Groves site in Lockhart, Texas, Oklo reached substantial completion of our isotope test reactor in just 229 days and is working toward criticality this July, making it one of the fastest-built reactors since the Manhattan Project. Once operational, Groves will support the production of critical isotopes used across medicine, industry, research, and other essential applications. Go inside Groves with CBS Austin:

At our Groves site in Lockhart, Texas, Oklo reached substantial completion of our isotope test reactor in just 229 days and is working toward criticality this July, making it one of the fastest-built reactors since the Manhattan Project. Once operational, Groves will support the production of critical isotopes used across medicine, industry, research, and other essential applications. Go inside Groves with CBS Austin:

32,465 views • 2 months ago

Oklo’s momentum is changing the paradigm of how we build advanced nuclear in the United States. Our Groves isotope test reactor is the only reactor built on privately owned land using commercially sourced fuel, equipment, and systems to receive Documented Safety Analysis approval under the U.S. Department of Energy Reactor Pilot Program. Oklo CEO Jacob DeWitte spoke with Liz Claman on FOX Business about how this project is establishing a new blueprint for how nuclear can scale in America:

Oklo’s momentum is changing the paradigm of how we build advanced nuclear in the United States. Our Groves isotope test reactor is the only reactor built on privately owned land using commercially sourced fuel, equipment, and systems to receive Documented Safety Analysis approval under the U.S. Department of Energy Reactor Pilot Program. Oklo CEO Jacob DeWitte spoke with Liz Claman on FOX Business about how this project is establishing a new blueprint for how nuclear can scale in America:

25,476 views • 2 months ago

Oklo CEO Jacob DeWitte joined Morning Call to discuss two major milestones for Oklo: startup authorization for our Groves Isotope Test Reactor and our founding membership in Prometheus. Yesterday’s U.S. Department of Energy authorization clears the way to load fuel and bring the fastest privately built reactor of its kind to first criticality. This week, Oklo also joined Prometheus, a DOE-supported initiative led by Idaho National Lab to unleash AI across the nuclear lifecycle. Both of these milestones reflect the momentum behind a new era of nuclear development and the opportunity to use AI to help deliver clean, reliable power more quickly. Watch:

Oklo CEO Jacob DeWitte joined Morning Call to discuss two major milestones for Oklo: startup authorization for our Groves Isotope Test Reactor and our founding membership in Prometheus. Yesterday’s U.S. Department of Energy authorization clears the way to load fuel and bring the fastest privately built reactor of its kind to first criticality. This week, Oklo also joined Prometheus, a DOE-supported initiative led by Idaho National Lab to unleash AI across the nuclear lifecycle. Both of these milestones reflect the momentum behind a new era of nuclear development and the opportunity to use AI to help deliver clean, reliable power more quickly. Watch:

19,374 views • 1 month ago

Oklo CEO Jacob DeWitte joined Liz Claman on FOX Business to discuss why nuclear is the clear solution for power in space. Nuclear has powered missions for decades through isotope systems that deliver continuous energy where others can’t. At Oklo, we’re building the systems that support both the present and the future, including our isotope test reactor that will reach criticality by July 4. Full interview:

Oklo CEO Jacob DeWitte joined Liz Claman on FOX Business to discuss why nuclear is the clear solution for power in space. Nuclear has powered missions for decades through isotope systems that deliver continuous energy where others can’t. At Oklo, we’re building the systems that support both the present and the future, including our isotope test reactor that will reach criticality by July 4. Full interview:

41,539 views • 4 months ago

🇺🇸From the White House: Oklo CEO Jacob DeWitte joined President Trump today as he signed Executive Orders to fast-track nuclear deployment, including regulatory path, fuel, and sites. 🎥 Watch Jake’s remarks: More on today’s announcement:

🇺🇸From the White House: Oklo CEO Jacob DeWitte joined President Trump today as he signed Executive Orders to fast-track nuclear deployment, including regulatory path, fuel, and sites. 🎥 Watch Jake’s remarks: More on today’s announcement:

103,097 views • 1 year ago

In less than two months, Oklo’s isotope test reactor will go critical. We’re building, iterating, and executing in real time across power, fuel, and isotopes. Follow our journey:

In less than two months, Oklo’s isotope test reactor will go critical. We’re building, iterating, and executing in real time across power, fuel, and isotopes. Follow our journey:

33,961 views • 4 months ago

From reactor development to fuel fabrication and isotope production, our projects are taking shape across the country. They're all part of a larger system supporting the growing demands of our energy future. At Oklo we're making real progress and laying the groundwork for a new kind of nuclear tech infrastructure.

From reactor development to fuel fabrication and isotope production, our projects are taking shape across the country. They're all part of a larger system supporting the growing demands of our energy future. At Oklo we're making real progress and laying the groundwork for a new kind of nuclear tech infrastructure.

20,382 views • 2 months ago

As Oklo CEO Jake DeWitte told Matt Miller on Bloomberg News, Oklo is building the ‘full stack’ for advanced nuclear. By investing in the full reactor lifecycle from supply chains to construction to operation, we’re learning how to make advanced nuclear deployment faster, more repeatable, and more scalable. Watch:

As Oklo CEO Jake DeWitte told Matt Miller on Bloomberg News, Oklo is building the ‘full stack’ for advanced nuclear. By investing in the full reactor lifecycle from supply chains to construction to operation, we’re learning how to make advanced nuclear deployment faster, more repeatable, and more scalable. Watch:

23,484 views • 2 months ago

Building nuclear means advancing multiple pieces of work at once, and Oklo has been busy. Over the past year, we moved from planning to execution: construction began Idaho National Lab for Aurora-INL in Idaho, key partners like Kiewit and Siemens Energy were locked in, fuel milestones were cleared, a fuel recycling facility was unveiled in Tennessee, and advanced our Radioisotopes Pilot Facility in Texas. And the work continues. Watch below ↓

Building nuclear means advancing multiple pieces of work at once, and Oklo has been busy. Over the past year, we moved from planning to execution: construction began Idaho National Lab for Aurora-INL in Idaho, key partners like Kiewit and Siemens Energy were locked in, fuel milestones were cleared, a fuel recycling facility was unveiled in Tennessee, and advanced our Radioisotopes Pilot Facility in Texas. And the work continues. Watch below ↓

49,848 views • 7 months ago

At Oklo, our isotope work is personal. Some members of our team have spent decades advancing the technology that shows up in critical moments, from disease diagnosis and cancer care to space exploration. That dedication shows up in how Oklo is built, and shapes how we think about deployment, bringing power, fuel, and isotopes together into a single platform designed to deliver more from nuclear technology. Watch here:

At Oklo, our isotope work is personal. Some members of our team have spent decades advancing the technology that shows up in critical moments, from disease diagnosis and cancer care to space exploration. That dedication shows up in how Oklo is built, and shapes how we think about deployment, bringing power, fuel, and isotopes together into a single platform designed to deliver more from nuclear technology. Watch here:

21,743 views • 3 months ago

What keeps a reactor safe? In Oklo’s Aurora powerhouse, safety is built into the physics. Inherent physical responses automatically stabilize the reactor under changing conditions. That means the same forces that drive the operation also stabilize it. These principles were proven 40 years ago in reactors like Experimental Breeder Reactor-II & Fast Flux Test Facility. Now, those same principles are the foundation for Oklo’s fast reactor technology today. Proven in practice, not just theory. Learn more:

What keeps a reactor safe? In Oklo’s Aurora powerhouse, safety is built into the physics. Inherent physical responses automatically stabilize the reactor under changing conditions. That means the same forces that drive the operation also stabilize it. These principles were proven 40 years ago in reactors like Experimental Breeder Reactor-II & Fast Flux Test Facility. Now, those same principles are the foundation for Oklo’s fast reactor technology today. Proven in practice, not just theory. Learn more:

23,918 views • 3 months ago

Ground is broken at the Oklo Idaho National Lab site. The first Aurora powerhouse is taking shape as part of the U.S. Department of Energy’s Reactor Pilot Program. Built to repurpose used fuel from the very reactor that inspired us, the Experimental Breeder Reactor II, turning yesterday’s innovation into tomorrow’s clean power.

Ground is broken at the Oklo Idaho National Lab site. The first Aurora powerhouse is taking shape as part of the U.S. Department of Energy’s Reactor Pilot Program. Built to repurpose used fuel from the very reactor that inspired us, the Experimental Breeder Reactor II, turning yesterday’s innovation into tomorrow’s clean power.

54,617 views • 11 months ago