Fusion power takes a commercial turn
BY: BILL SPINDLE
DEVENS, Mass. — In a wooded enclave an hour’s drive from Boston, there’s a cavernous building with a large, circular hole cut into the sprawling concrete floor. That’s where the fusion reactor will go.
Across the 47-acre campus, hard-helmeted workers oversee machines coiling thousands of meters of superconducting metallic ribbon. These ribbons will be carefully arranged to form the heart of the reactor. Within it, a glob of matter heated to around 150 million degrees Celsius — more than 10 times hotter than the sun — will produce energy. If the machine works, it will produce more energy than it takes to keep the reaction going.
This energy would be generated without producing greenhouse gas emissions.
I’ve visited dozens of factories and construction sites in three decades as a reporter — a potato chip plant in Iraq, a milk production facility in India, a car factory in Japan and a solar panel manufacturer in Texas. The facility in Massachusetts is something else altogether.
Commonwealth Fusion Systems, the company behind this reactor, wants to set the world’s energy system on a new trajectory toward a future of limitless clean energy. Here in Devens, those lofty aspirations are meeting the real-world challenges of building a commercial power plant.
The company is a well-funded startup whose financial backers include Bill Gates’ Breakthrough Energy Ventures (BEV is a program of Breakthrough Energy, which also supports Cipher). It is among a handful of companies trying to turn fusion not just into a reality, but into viable businesses. Their efforts are backed by government support around the world. Others in the space include Helion Energy, TAE Technologies, General Fusion, Avalanche Fusion, Zap Energy, nT-Tao and UK Industrial Fusion Solutions.
Fusion takes place naturally and constantly across the universe in stars like our sun. Staggeringly high temperatures and intense pressure cause atomic particles to smash together, generating fantastical amounts of energy as they fuse. Making that happen on Earth is hard. Harder still is doing it continuously and cost effectively, the key to commercializing the technology.
Existing nuclear power plants rely on a different reaction known as nuclear fission, where atoms are split apart. That process creates hazardous radioactive waste and without careful control can result in a self-sustaining, destructive runaway reaction. Fusion reactions, in contrast, cannot become self-sustaining and don’t produce radioactive waste.
In recent years, researchers in an experimental lab have generated more energy from a fusion reaction than they put into it — a major scientific breakthrough. The method they used can’t be practically commercialized, though.
Some attempts at commercial fusion are modifying that method — which uses high-powered lasers — while others have opted for different methods. Commonwealth will deploy special electro-magnets — what they call their “special sauce” — to enable a reactor the company is betting will be less expensive to construct and operate.
Commonwealth aims to switch on its reactor, dubbed SPARC, in 2026. The device is being built to demonstrate a fusion reaction can be sustained in a commercially viable way. A larger reactor would then be built to begin generating commercial power in about a decade, the company says.
“You can’t jump straight to the commercial,” said Bob Mumgaard, chief executive and a founder of the company. “But compared to the laboratory, SPARC is delivered in a much more manufactured way. It’s got things that before were made in a high-end, tinkered way but now are replaced with an off-the-shelf thing from a large supplier.”
Read the full article on Cipher’s website.
Investors in Commonwealth Fusion Systems and Zap Energy include Breakthrough Energy Ventures, a program of Breakthrough Energy, which also supports Cipher. Bill Gates, founder of Breakthrough Energy, is also individually invested in Commonwealth Fusion.