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Geothermal is getting closer to the big time. Last week, Fervo Energy — arguably the country’s leading enhanced geothermal company — announced that its Utah demonstration project had achieved record production capacity. The new approach termed “enhanced geothermal,” which borrows drilling techniques and expertise from the oil and gas industry, seems poised to become a big player on America’s clean, 24/7 power grid of the future.
Why is geothermal so hot? How soon could it appear on the grid — and why does it have advantages that other zero-carbon technologies don’t? On this week’s episode of Shift Key, Rob and Jesse speak with a practitioner and an expert in the world of enhanced geothermal. Sarah Jewett is the vice president of strategy at Fervo Energy, which she joined after several years in the oil and gas industry. Wilson Ricks is a doctoral student of mechanical and aerospace engineering at Princeton University, where he studies macro-energy systems modeling. Shift Key is hosted by Robinson Meyer, the founding executive editor of Heatmap, and Jesse Jenkins, a professor of energy systems engineering at Princeton University.
Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, or wherever you get your podcasts.
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Here is an excerpt from our conversation:
Robinson Meyer: I just wanted to hit a different note here, which is, Sarah, you’ve alluded a few times to your past in the oil and gas industry. I think this is true across Fervo, is that of course, the technologies we’re discussing here are fracking derived. What has your background in the oil and gas industry and hydrocarbons taught you that you think about at Fervo now, and developing geothermal as a resource?
Sarah Jewett: There are so many things. I mean, I’m thinking about my time in the oil and gas industry daily. And you’re exactly right, I think today about 60% of Fervo’s employees come from the oil and gas industry. And because we are only just about to start construction on our first power facility, the percentage of contractors and field workers from the oil and gas industry is much higher than 60%.
Jesse Jenkins: Right, you can’t go and hire a bunch of people with geothermal experience when there is no large-scale geothermal industry to pull from.
Jewett: That’s right. That’s right. And so the oil and gas industry, I think, has taught us, so many different types of things. I mean, we can’t really exist without thinking about the history of the oil and gas industry — even, you know, Wilson and I are sort of comparing our learning rates to learning rates observed in various different oil and gas basins by different operators, so you can see a lot of prior technological pathways.
I mean, first off, we’re just using off the shelf technology that has been proven and tested in the oil and gas industry over the last 25 years, which has been, really, the reason why geothermal is able to have this big new unlock, because we’re using all of this off the shelf technology that now exists. It’s not like the early 2000s, where there was a single bit we could have tried. Now there are a ton of different bits that are available to us that we can try and say, how is this working? How is this working? How’s this working?
So I think, from a technological perspective, it’s helpful. And then from just an industry that has set a solid example it’s been really helpful, and that can be leveraged in a number of different ways. Learning rates, for example; how to set up supply chains in remote areas, for example; how to engage with and interact with communities. I think we’ve seen examples of oil and gas doing that well and doing it poorly. And I’ve gotten to observe firsthand the oil and gas industry doing it well and doing it poorly.
And so I’ve gotten to learn a lot about how we need to treat those around us, explain to them what it is that we’re doing, how open we need to be. And I think that has been immensely helpful as we’ve crafted the role that we’re going to play in these communities at large.
Wilson Ricks: I think it’s also interesting to talk about the connection to the oil and gas industry from the perspective of the political economy of the energy transition, specifically because you hear policymakers talk all the time about retraining workers from these legacy industries that, if we’re serious about decarbonizing, will unavoidably have to contract — and, you know, getting those people involved in clean energy, in these new industries.
And often that’s taking drillers and retraining some kind of very different job — or coal miners — into battery manufacturers. This is almost exactly one to one. Like Sarah said, there’s additional expertise and experience that you need to get really good at doing this in the geothermal context. But for the most part, you are taking the exact same skills and just reapplying them, and so it allows for both a potentially very smooth transition of workforces, and also it allows for scale-up of enhanced geothermal to proceed much more smoothly than it potentially would if you had to kind of train an entire workforce from scratch to just do this.
This episode of Shift Key is sponsored by …
Watershed’s climate data engine helps companies measure and reduce their emissions, turning the data they already have into an audit-ready carbon footprint backed by the latest climate science. Get the sustainability data you need in weeks, not months. Learn more at watershed.com.
As a global leader in PV and ESS solutions, Sungrow invests heavily in research and development, constantly pushing the boundaries of solar and battery inverter technology. Discover why Sungrow is the essential component of the clean energy transition by visiting sungrowpower.com.
Antenna Group helps you connect with customers, policymakers, investors, and strategic partners to influence markets and accelerate adoption. Visit antennagroup.com to learn more.
Music for Shift Key is by Adam Kromelow.
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‘Our entire company was built for this purpose.’
After decades of stagnation, the nuclear industry has drummed up all kinds of ideas meant to revive the prospects for building reactors in the United States. Make the reactors smaller. Micro, even! Cool them with helium or molten salt instead of water. Invite the Koreans or Canadians to come teach us how to construct atomic power stations again.
Yet the startup bold enough to name itself The Nuclear Company launched in 2024 on a simpler thesis: Just go with the large-scale reactors we have built before, and construct them in bulk to bring down costs.
Essentially, do what the Chinese did.
While the U.S. struggled for 15 years to complete its first two Westinghouse AP1000s, the 1.1-gigawatt units designed at the dawn of this century to be America’s flagship nuclear technology, China built four in the same time period. Beijing then reverse-engineered the technology to make its own version with an entirely domestic supply chain. China now has 10 operating Hualong One reactors and at least 37 more on the way. The U.S. ultimately completed its first two AP1000s at Southern Company’s Alvin W. Vogtle Electric Generating Plant in eastern Georgia right around the same time.
The Nuclear Company was formed by hiring former managers who oversaw the Georgia project. Despite the Trump administration’s pledge to finance construction of at least 10 more large nuclear reactors, the only projects that have broken ground are new, first-of-a-kind small modular reactors that skeptics fear will face the same billion-dollar cost overruns that the AP1000s faced at Plant Vogtle — but without the same output of electricity to balance out the expenses.
On Wednesday morning, The Nuclear Company announced its most significant attempt at a Chinese-scale buildout yet. The firm unveiled plans to build 6.6 gigawatts of new, large-scale reactors at a greenfield site in Kentucky, along the Ohio River. Dubbed Prosperity One, the project would be located in Lewis County, on property once assembled for a coal-fired station that was later abandoned. The site sits half a mile from a 765-kilovolt transmission line that connects to PJM Interconnection, the nation’s second-largest and arguably most stressed grid system.
“Our entire company was built for this purpose,” Joe Klecha, The Nuclear Company’s chief nuclear officer and a former manager on the Plant Vogtle buildout, told me. “We recognize that this is different and unique in our country. We believe it’s very much needed.”
The project will begin with two reactors at a time; the Kentucky site has room for up to six. The Nuclear Company is already negotiating potential offtake agreements with electricity buyers to help finance construction, and it expects deals by next year. The company told me it has not yet decided whether it will run the Prosperity One as an independent power provider or sell the facility to a utility or another plant operator. “We are preserving all options and will make that decision as we pull the other partners onboard formally,” Klecha said.
Since its inception, The Nuclear Company has focused on the AP1000 as the most promising design in the U.S. That’s particularly true after the Nuclear Regulatory Commission certified the Vogtle Unit 4 design last week as the permanent, settled schematic for future AP1000s.
But Klecha left open the possibility of another technology. “The AP1000 is our basis for the site at this point, but we’ll continue to evaluate other options as we get through the site characterization,” he said. He expects that process to wrap up in “the first half of next year.”
The company’s options are limited, though. Last month, as I reported, South Korea agreed to help the U.S. build up to six new AP1000s at an as-yet-unspecified site in addition to constructing at least two APR1400s — that is, essentially the Korean version of the American technology. In theory, The Nuclear Company could build APR1400s, too. But it’s highly unlikely, since Westinghouse accused the state-owned Korea Electric Power Corporation of ripping off its technology for the APR1400 in 2022. That led to a yearslong lawsuit and settlement that gave the American company the right to demand royalties and keep Seoul out of markets where Westinghouse aims to compete.
The only other viable option is the ABWR. The world’s first so-called advanced reactor, the ABWR was built with General Electric’s boiling water reactor technology, which is used across about a third of the U.S. fleet. It serves as the second-most popular design after Westinghouse’s pressurized water reactor model. Japan successfully built four ABWRs over a decade from 1996 to 2006, and Taiwan nearly completed two before killing the project in a bid to phase out nuclear power altogether. The NRC certified the ABWR for construction in the U.S., but a project in southern Texas that aimed to build the first in the U.S. was scrapped about a decade ago.
“The ABWR has an impressive pedigree of construction success as well as experience being built to U.S. standards that is hard to find outside of the Vogtle project,” Brett Rampal, a veteran nuclear consultant who advises Deloitte and Veriten, told me. Still, he said, the AP1000 is the leading contender for the Kentucky site.
Rampal said Prosperity One represents a welcome break from how large-scale reactors have been planned in recent years. While most of the industry remains focused on small modular reactors, research I covered last month indicates the technologies could face worse cost problems than large-scale units, and the emerging consensus on building AP1000s focuses on expanding existing nuclear plants.
Indeed, The Nuclear Company’s first major deal was to help Brookfield Asset Management, which owns 51% of Westinghouse, complete a thwarted AP1000 project at the V.C. Summer plant in South Carolina. But other potential sites considered for new AP1000s included expansions of Florida Power & Light’s Turkey Point nuclear plant in Florida, the Tennessee Valley Authority’s Bellefonte nuclear station in Alabama, or even adding another two units to Plant Vogtle.
“A lot of the thoughts around AP1000s and large reactors have always been around existing or already-licensed sites,” Rampal said. “It’s very interesting to see TNC’s first project buck the trend of what folks have been talking about around the large reactor story in this country."
At least one thing is certain about The Nuclear Company’s approach: It will settle on one design. The company is animated by the need to avoid one of the U.S. nuclear industry’s biggest financial mistakes, known simply and derisively as “Whoops.” In 1983, the Washington Public Power Supply System — WPPSS — triggered what was then the largest municipal bond default in U.S. history after its buildout of several different reactor designs at once fell apart in a major boondoggle.
Building different reactors at Prosperity One “really goes against our mission, our vision, and our thesis as a company,” Klecha confirmed.
The key is repeating the same design over and over again so the project managers sort out the fastest, most efficient ways to build and workers hone skills in actually constructing the design. “Six AP1000 units on one site creates the scale and repetition needed to drive down costs and sends a strong signal to the supply chain,” Lin Yuan, the senior advisor at the Nuclear Scaling Initiative, a non-profit collaboration working to create the enabling commercial and policy conditions for safe and secure nuclear energy scaling, told me in an email. “Manufacturers and craft labor need to see a sustained order pipeline to invest in capacity, factory expansion, and training.”
Vogtle Unit 4 came online in 2024 roughly 30% cheaper and faster than Vogtle Unit 3, completed a year earlier. Klecha said that’s the minimum cost reduction The Nuclear Company expects for the first two reactors built at Prosperity One.
“The 30%, I would say, is the floor on the savings from the first unit to the second unit,” he said. “How do we capture those lessons? Obviously, our team’s experience. We have a pretty rigorous ‘lessons learned’ document.”
Soon, he hopes, there will be even more lessons learned — in concrete, rather than on paper.