Commonwealth Fusion Systems, which is planning to build a nuclear fusion plant in Chesterfield, has secured $1 billion in equity financing in its latest capital raise. (BizSense file image courtesy CFS)
An MIT-born startup’s plan to build the world’s first nuclear fusion power plant in Chesterfield just got a 10-figure jolt.
Commonwealth Fusion Systems announced Thursday it has secured $1 billion in financing to fuel its efforts to open a Chesterfield-based commercial-scale power plant, which the company calls ARC, in the coming years. The local project comes as the company eyes completion of its prototype fusion machine, known as SPARC, at its Massachusetts headquarters.
“(The funding) allows us to move to the next machine, which is ARC. It doesn’t allow us to go build the whole thing but allows us to take the lessons we’ve learned from SPARC, de-risk by building prototypes at scale of some of the systems that are in the ARC power plant that are not in SPARC, take our supply chain and get it retooled. Take our internal manufacturing, expand it, go faster, retool it. Take the site for the first ARC and prep it,” CFS co-founder and CEO Bob Mumgaard said during a virtual news conference earlier this week.
CFS says it will power up the Chesterfield facility, which is being called the Fall Line Fusion Power Station, in the early 2030s.
CFS is still lining up approvals needed for the plant’s operation. Mumgaard described the project as still being in permitting, though according to online county records CFS hasn’t yet filed a site plan or a build permit for the power plant planned at 1201 Battery Brooke Parkway. CFS secured the conditional-use permit needed for the project in late 2025.
In April, CFS announced it filed a request with PJM, the regional power transmission organization that runs an electrical power market in Virginia and a dozen other states, to be connected to the electrical grid.
“We’ve secured many of the permits already. We’ve got an application in on the interconnection. We’ve got the agreement with Dominion on the site. We’ve been engaged with the community and we’re getting ready to move some dirt down there and start to prep that site (in Chesterfield),” he said, adding that the company was well underway on the plant’s design.
The 400-megawatt fusion plant would be built on 25 to 40 acres of an overall 94-acre property owned by Dominion Energy in the Chester area. CFS has previously said it has signed a lease option for the site and would pay for and own the facility.
A conceptual plan of the 400-megawatt nuclear fusion power plant, which would be built on a 94-acre property in the Chester area. (County documents)
CFS declined to share a cost estimate for the local power plant this week. When the project was announced in late 2024, then-Gov. Glenn Youngkin called it a “multibillion-dollar” investment.
The facility is expected to sell power to commercial users, including Google, which in 2025 announced an agreement to buy 200 megawatts of electricity from the CFS facility. Later the same year, CFS announced a similar power-purchase deal with Italian energy company Eni.
CFS said the financing announced this week is the largest single raise that any fusion company has secured since Commonwealth Fusion raised $1.8 billion in 2021. The company, which calls itself the largest private fusion company in the world, was spun out of MIT in 2018 as a business venture to commercialize fusion power.
Investors in the latest round included sovereign wealth funds and pension funds among what CFS described in a news release as “infrastructure and industrial corporate partners.” The company declined to identify the investors who participated in the latest round but said they were largely new investors in CFS.
CFO Lorence Kim said the lineup of the funders was proof that the company was in the lead in the ongoing race among startups and governments across the world to be the first to commercialize fusion power.
“The feedback (from investors) that we got was that CFS has de-risked the science. We were executing like no one else at scale with the capital and vision to deliver SPARC, to deliver the first ARC power plant, and then many ARCs afterward,” Kim said.
Nuclear fusion, which involves the collision and fusion of atomic nuclei, is how the sun generates energy. Replicating the process at a commercial scale with man-made technology has been studied for decades but hasn’t yet been achieved.
Fusion is considered a renewable energy source and safer than today’s nuclear fission, which involves the splitting of atoms and results in long-lasting, highly radioactive waste. Fusion doesn’t cause meltdowns or the create greenhouse gases.
Commonwealth Fusion Systems has nearly completed its prototype fusion machine called SPARC. On the left is the second half of the doughnut-shaped vessel that is the core of the SPARC device before installation at the company’s Massachusetts facility. (Courtesy Commonwealth Fusion Systems)
Before moving full-speed into development of the Chesterfield plant, CFS must continue its work on the SPARC prototype.
SPARC is a tokamak, which is a doughnut-shaped device that uses magnetic fields to create plasma particles hot enough to fuse together, creating the conditions necessary for nuclear fusion. The successful operation of that machine would be a preliminary step toward the commercial-scale fusion plant planned locally.
With the prototype “80% complete,” Mumgaard said the company’s latest funding round brings into focus its ultimate goal of commercialized fusion at the future ARC facility in Chesterfield.
“If you think about us standing on two feet, the weight is shifting from the SPARC foot to the ARC foot. And that’s super exciting because it means that when SPARC turns on, we’ll be able to take off on the next step to ARC,” Mumgaard said.
Commonwealth Fusion Systems, which is planning to build a nuclear fusion plant in Chesterfield, has secured $1 billion in equity financing in its latest capital raise. (BizSense file image courtesy CFS)
An MIT-born startup’s plan to build the world’s first nuclear fusion power plant in Chesterfield just got a 10-figure jolt.
Commonwealth Fusion Systems announced Thursday it has secured $1 billion in financing to fuel its efforts to open a Chesterfield-based commercial-scale power plant, which the company calls ARC, in the coming years. The local project comes as the company eyes completion of its prototype fusion machine, known as SPARC, at its Massachusetts headquarters.
“(The funding) allows us to move to the next machine, which is ARC. It doesn’t allow us to go build the whole thing but allows us to take the lessons we’ve learned from SPARC, de-risk by building prototypes at scale of some of the systems that are in the ARC power plant that are not in SPARC, take our supply chain and get it retooled. Take our internal manufacturing, expand it, go faster, retool it. Take the site for the first ARC and prep it,” CFS co-founder and CEO Bob Mumgaard said during a virtual news conference earlier this week.
CFS says it will power up the Chesterfield facility, which is being called the Fall Line Fusion Power Station, in the early 2030s.
CFS is still lining up approvals needed for the plant’s operation. Mumgaard described the project as still being in permitting, though according to online county records CFS hasn’t yet filed a site plan or a build permit for the power plant planned at 1201 Battery Brooke Parkway. CFS secured the conditional-use permit needed for the project in late 2025.
In April, CFS announced it filed a request with PJM, the regional power transmission organization that runs an electrical power market in Virginia and a dozen other states, to be connected to the electrical grid.
“We’ve secured many of the permits already. We’ve got an application in on the interconnection. We’ve got the agreement with Dominion on the site. We’ve been engaged with the community and we’re getting ready to move some dirt down there and start to prep that site (in Chesterfield),” he said, adding that the company was well underway on the plant’s design.
The 400-megawatt fusion plant would be built on 25 to 40 acres of an overall 94-acre property owned by Dominion Energy in the Chester area. CFS has previously said it has signed a lease option for the site and would pay for and own the facility.
A conceptual plan of the 400-megawatt nuclear fusion power plant, which would be built on a 94-acre property in the Chester area. (County documents)
CFS declined to share a cost estimate for the local power plant this week. When the project was announced in late 2024, then-Gov. Glenn Youngkin called it a “multibillion-dollar” investment.
The facility is expected to sell power to commercial users, including Google, which in 2025 announced an agreement to buy 200 megawatts of electricity from the CFS facility. Later the same year, CFS announced a similar power-purchase deal with Italian energy company Eni.
CFS said the financing announced this week is the largest single raise that any fusion company has secured since Commonwealth Fusion raised $1.8 billion in 2021. The company, which calls itself the largest private fusion company in the world, was spun out of MIT in 2018 as a business venture to commercialize fusion power.
Investors in the latest round included sovereign wealth funds and pension funds among what CFS described in a news release as “infrastructure and industrial corporate partners.” The company declined to identify the investors who participated in the latest round but said they were largely new investors in CFS.
CFO Lorence Kim said the lineup of the funders was proof that the company was in the lead in the ongoing race among startups and governments across the world to be the first to commercialize fusion power.
“The feedback (from investors) that we got was that CFS has de-risked the science. We were executing like no one else at scale with the capital and vision to deliver SPARC, to deliver the first ARC power plant, and then many ARCs afterward,” Kim said.
Nuclear fusion, which involves the collision and fusion of atomic nuclei, is how the sun generates energy. Replicating the process at a commercial scale with man-made technology has been studied for decades but hasn’t yet been achieved.
Fusion is considered a renewable energy source and safer than today’s nuclear fission, which involves the splitting of atoms and results in long-lasting, highly radioactive waste. Fusion doesn’t cause meltdowns or the create greenhouse gases.
Commonwealth Fusion Systems has nearly completed its prototype fusion machine called SPARC. On the left is the second half of the doughnut-shaped vessel that is the core of the SPARC device before installation at the company’s Massachusetts facility. (Courtesy Commonwealth Fusion Systems)
Before moving full-speed into development of the Chesterfield plant, CFS must continue its work on the SPARC prototype.
SPARC is a tokamak, which is a doughnut-shaped device that uses magnetic fields to create plasma particles hot enough to fuse together, creating the conditions necessary for nuclear fusion. The successful operation of that machine would be a preliminary step toward the commercial-scale fusion plant planned locally.
With the prototype “80% complete,” Mumgaard said the company’s latest funding round brings into focus its ultimate goal of commercialized fusion at the future ARC facility in Chesterfield.
“If you think about us standing on two feet, the weight is shifting from the SPARC foot to the ARC foot. And that’s super exciting because it means that when SPARC turns on, we’ll be able to take off on the next step to ARC,” Mumgaard said.
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Until another scientist is Nuno Loureiro’d
I had to look up this guy, Nuno. He came up with the following and apparently understood it. He was shot and killed by a former classmate who apparently didn’t fare as well in the course:
“Efficient quantum algorithm for dissipative nonlinear differential equations”.
That’s a mouthful.
It’s a math thing.
Where are the cart and horse emoticons?
SPARC is using fuel generated by conventional fission nuclear plants. The cost of the fuel is astronomical, $35k per gram at minimum. The only way to make fusion cost effective is to produce new fuel (tritium) on site using a complex lithium blanket system and then extracting the tritium from the irradiated slurry. It’s difficult and dangerous and most importantly it has never been done. Among the many challenges for ARC, I think fuel production is the most difficult. Even if the process is perfected, there is no guarantee it will be cost effective.
Very true, but worth the effort never-the-less. What alternatives to fossil fuels outside of fusion do you think offer the best chance moving forward?
ZPE. But that tends to get one dead or destitute (Tesla, TT Brown) first.
To offer a point of clarifiation, the ARC reactor will use an extremely small amount of fuel compared to other base load power generators. It so remarkably small because fusion fuel is extraordinarily energy dense. As you note, ARC is designed to breed its own tritium in a lithium-containing blanket to achieve fuel self-sufficiency. Even with an output of roughly 400 MW of baseload generator, the annual supply of fuel will fit in a few small containers rather than the trainloads of fuel required by traditional fossil generation.
I think the new geothermal power systems that drill down 5 miles into the earth might be a good fit to replace the gas plant in Cumberland County. I think a lot of these elements to power this reactor might be mined on the moon.