Fusion energy has cleared major scientific hurdles. Now researchers have a new way to determine whether future power plants can actually make money.<\/p>\n
Scientists spent the last decade proving fusion energy works as a matter of physics. The next hurdle isn\u2019t scientific, but financial.\u00a0<\/p>\n
A new study lays out a framework for figuring out whether fusion power plants can actually turn a profit in a competitive energy market. <\/p>\n
The approach treats the economics with the same rigor physicists have long applied to the plasma itself.<\/p>\n
The research was led by MIT professors Dennis Whyte and Andrew W. Lo, both affiliated with Rutherford Energy Ventures<\/a> and MIT\u2019s Plasma Science and Fusion Center<\/a>.\u00a0<\/p>\n Fusion power faces a financial test<\/p>\n Whyte, a professor of nuclear science and engineering at MIT and a leading figure in the field, argues fusion research<\/a> has reached the point where money deserves the same scrutiny as the science.<\/p>\n \u201cIt\u2019s all the things that come along with finding, allocating, and spending money at this scale,\u201d Whyte said.\u00a0\u201cThis is critical to what we do. We should look at the economics.\u201d\u00a0<\/p>\n \u201cIf we want this technology to actually be meaningful in the world economy, we have to start getting straight with ourselves about these topics.\u201d<\/p>\n The goal, Whyte says, is to build \u201cthis framework, where all the economics are clear, and then we understand what it would mean\u201d for any fusion power plant, regardless of the specific technology behind it.<\/p>\n Borrowing an idea from physics<\/p>\n Fusion energy works by recreating the reaction that powers stars<\/a>. It fuses light atomic nuclei together to release energy, typically inside a plasma confined by magnets or triggered by powerful lasers.<\/p>\n In 2022, researchers at the National Ignition Facility<\/a> in Livermore, California, achieved a fusion reaction with positive energy gain, a genuine scientific milestone.<\/p>\n Venture capital has since poured into the field, even though a commercially viable plant remains a very different challenge.<\/p>\n The new framework draws direct inspiration from the Lawson Criterion, a formula developed in the 1950s. It describes the combination of temperature, plasma density, and confinement time needed to produce net energy from fusion, regardless of a reactor\u2019s size.<\/p>\n That formula calculates \u201cplasma Q,\u201d the ratio of fusion power produced to the power required to sustain the reaction.<\/p>\n \u201cThe Lawson Criterion describes the scientific success of energy gain from fusion plasmas, while our framework generally describes economic Q, which is the ratio of capital gained to that expended,\u201d Whyte explained.<\/p>\n The numbers behind fusion economics<\/p>\n The framework lays out ten parameters for judging whether a fusion power plant makes economic sense.<\/p>\n Some are physical, covering how much energy a plant consumes versus produces. Most fall under engineering and economics: construction costs, power density<\/a>, how efficiently fusion power converts into a sellable product, and how durable the conversion components are.<\/p>\n The exercise centers on what it takes to achieve a net-positive economic return, applied to practical power plant design.<\/p>\n Crucially, the framework doesn\u2019t play favorites among the many competing approaches for generating and containing fusion energy.<\/p>\n It\u2019s \u201ccompletely agnostic to whatever fusion concept you use, because the physical reality of fusion is that you expend money to build the capability to produce fusion power,\u201d Whyte said. <\/p>\n Nor does it depend on reactor size, since every input can be scaled to whatever project or output level is being evaluated.<\/p>\n \u201cIt doesn\u2019t matter whether the fusion power plant is small or large, the bottom line is: in both cases you better have money coming out that exceeds the money going in, otherwise it\u2019s not going to be around for very long,\u201d Lo said.<\/p>\n Putting a price on fusion energy<\/p>\n Lo, a professor of finance at MIT Sloan School of Management<\/a>, points to a persistent gap in how the field approaches costs.\u00a0<\/p>\n Researchers track the expenses of basic experiments closely, but estimating what an actual commercial fusion reactor will cost to build and run is a fundamentally different, less mature exercise.<\/p>\n \u201cIt\u2019s challenging to reduce complex scientific and engineering requirements to economic consequences,\u201d Lo said.\u00a0<\/p>\n \u201cBut if we don\u2019t do that, we\u2019re not going to get the funding we need to achieve the impact we want.\u201d<\/p>\n Investment in fusion is growing<\/p>\n That gap matters more now as fresh investment pours into fusion. Commonwealth Fusion Systems<\/a>, an MIT spinoff Whyte co-founded, recently secured a new billion-dollar funding round and hopes to open its first plant in Virginia sometime in the 2030s.<\/p>\n Lo acknowledges that the industry\u2019s first commercial reactors<\/a> will involve real uncertainty. But he sees reason for optimism in how other deep-technology industries have evolved once they got off the ground.<\/p>\n \u201cThis pattern of learning by doing exists in all deep technology sectors,\u201d Lo said, pointing out that sequencing a human genome costs roughly a million times less today than it did about 25 years ago.<\/p>\n \u201cWe\u2019re going to see the same thing, but maybe not to the same degree, in fusion energy.\u201d<\/p>\n Lo has spent years helping scientific research secure financial backing in biotechnology<\/a>. He is now launching a new MIT Sloan program called CATAPULT, aimed at giving researchers better tools for turning their work into products.<\/p>\n On fusion specifically, he\u2019s confident the moment for this kind of analysis has arrived. \u201cIt\u2019s pretty clear that economic viability is something we can start assessing now.\u201d<\/p>\n Giving fusion energy a price<\/p>\n Thousands of decisions go into building a commercial fusion plant, and the authors believe their framework finally offers a way to quantify what any one of those decisions is actually worth.<\/p>\n \u201cWhen you\u2019ve got a framework to evaluate it in a quantitative way, it tells you about the literal worth of making a particular design decision,\u201d Whyte said.<\/p>\n \u201cThat seems to me at this moment of fusion development absolutely critical, and what we\u2019ve been missing.\u201d<\/p>\n The study is published in the Journal of Fusion Energy<\/a>.<\/p>\n \u2014-<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com<\/a>.<\/p>\n \u2014-<\/p>\n","protected":false},"excerpt":{"rendered":"Fusion energy has cleared major scientific hurdles. 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