GoKawiilThe takeaway: Fusion startups are attracting record amounts of money, building new test sites, and setting ambitious delivery dates. The harder task is proving that a fusion reactor can produce reliable electricity at a cost utilities will accept. For now, the technology still faces major hurdles before those commercial targets can be met.
Pacific Fusion recently broke ground on a test facility in Albuquerque, New Mexico. Helion Energy says it plans to provide electricity to Microsoft by 2028. Other companies are aiming to build commercial plants in the 2030s.
The money behind those efforts is growing. Fusion startups raised $3.8 billion in the first eight months of the year, according to PitchBook, more than the $3.3 billion invested during all of last year. The Fusion Industry Association says the number of private fusion companies has doubled over the past five years to more than 50.
The investment reflects real scientific progress. Fusion researchers can create and confine plasma at temperatures above 100 million degrees Celsius. In 2022, the National Ignition Facility at Lawrence Livermore National Laboratory achieved net energy gain in a laser experiment, producing more fusion energy than the laser energy delivered to its fuel target.
That was an important physics result, but it was not a power-plant demonstration. The experiment generated 3.15 megajoules of fusion energy, while the facility's 192 lasers consumed about 422 megajoules of electricity. The result did not account for the broader energy and operating costs of the facility.
That difference is central to the commercial argument. A power plant must do more than trigger a fusion reaction. It must generate more electricity than the entire system consumes, run for long periods, survive extreme conditions, and deliver steady output to the grid.
Alain Bécoulet, chief scientist at ITER, the international fusion project backed by 34 countries, expects experimental facilities to produce substantial fusion power within the next decade. But he said those results are likely to come in short bursts, perhaps lasting no more than 20 seconds. That is not the type of output grid operators need. "There is no point. You cannot sell anything out of [an intermittent source]," Bécoulet told The Financial Times.
The materials challenge remains unresolved as well. A fusion reactor must withstand intense heat and radiation, which can damage internal components and make them radioactive. Mohamed Abdou, professor emeritus of mechanical and aerospace engineering at UCLA, has said a failure in the plasma chamber could force a full shutdown and require months of repair work.
Fuel supply is another issue. Many proposed reactors would rely on tritium, a rare form of hydrogen. A commercial plant would need to produce at least some of that fuel itself. So far, tritium breeding has been demonstrated only in laboratory conditions.
Some researchers see a more gradual timeline than startups are presenting. Steven Cowley, director of the Princeton Plasma Physics Laboratory, said he is "confident" that a pilot facility could produce more electricity than it consumes by the late 2030s. But he said a pilot plant should not be confused with a commercial one.
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