America is "making an unprecedented attempt to revive three shuttered nuclear plants to meet rising energy demand," reports the Los Angeles Times, "Two of the plants have contracts with Big Tech companies that will pay a premium to get large amounts of carbon-free energy for data centers..." No commercial nuclear reactor is known to have resumed generating electricity after beginning the decommissioning process that takes one out of service, though some reactors have restarted after long outages. The Department of Energy is lending as much as $4.4 billion to restart the Palisades Power Plant in Michigan, the Crane Clean Energy Center on Pennsylvania's Three Mile Island and the Duane Arnold Energy Center in Iowa to restore a combined 2.25 gigawatts of electricity, which can power roughly 2 million homes and businesses. All three of the plants closed before their licenses expired, largely because the electricity they produced was considered too expensive... Restarting a reactor is a fairly quick way to get a lot of electricity, and it's cheaper than building a new, large reactor, said nuclear engineering expert Todd Allen... Edwin Lyman, at the Union of Concerned Scientists, said the taxpayer money being used should go toward addressing safety risks. For example, most U.S. plants were built between 1970 and 1990 and were designed to withstand natural disasters of that era, said Lyman, director of nuclear power safety at UCS. But climate change is making extreme weather events more frequent and severe. "It's possible, if they set the right level of safety and spend the necessary funds to meet that, they could restore these plants to operable condition," he said. "That's not happening at this point...." NextEra Energy and Google are collaborating to restart Duane Arnold by early 2029... Microsoft has a contract with the Crane Clean Energy Center on Three Mile Island just outside Harrisburg. The plant was the site of the nation's worst commercial nuclear power accident in 1979. The accident destroyed one reactor, leaving the plant with one functioning. In 2019, Constellation Energy's then-parent company Exelon shut down the functioning reactor, saying it was losing money and that Pennsylvania lawmakers had refused to subsidize it. Constellation Energy announced in 2024 that it would spend $1.6 billion to restart the reactor under a 20-year agreement with Microsoft. It hopes to bring the plant back online in 2027... Palisades is expected to be the first nuclear plant in the world to resume generating power after beginning the decommissioning process.

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"This year, nearly the entire fleet of 94 U.S. nuclear reactors has been offered the chance to integrate AI into its operations, and most have taken it," reports IEEE Spectrum: In August, California-based Atomic Canyon launched NIVA, the Nuclear Industry Virtual Assistant, which was developed in cooperation with nuclear-industry groups. The assistant was pilot-tested in nuclear plants run by Constellation Energy and is now available to the United States' entire fleet of reactors.... Meanwhile, the AI-for-nuclear startup Nuclearn says its products have gone to work with more than 65 U.S. partners, a total that includes many traditional plants but also an integration with NuScale Power Corp. that is working toward advanced small nuclear reactors. Microsoft and Nvidia have collaborated on a project to apply AI toward optimizing "the entire life cycle of a nuclear plant, spanning site permitting, design, construction, and continuous operations." The reason for the rapid adoption, according to Nuclearn CFO and cofounder Jerrold Vincent, is twofold. First, the technology companies banking their futures on AI are also keen on a revival of nuclear power to provide the electricity for all those data centers. Vincent says AI is also ideal for addressing some of the nuclear industry's most pressing problems. Many of the things that make reactors so difficult to operate — intricate regulations, along with complex systems for management and maintenance — are exactly the kinds of tasks that AI is good at. The industry is staggering to deal with aging hardware and an aging workforce. If it is going to survive, and have a real shot at a nuclear revival, it will need help from machine intelligence, Vincent says... Right now, the principal output of a nuclear reactor (aside from electricity) is paperwork. Nuclear plants produce piles of documentation to demonstrate regulatory compliance and to record how they respond to any potential problem, from a crack in the sidewalk to a fault in the reactor... Nuclearn's AI products help plants search through large repositories of data more efficiently to more quickly file paperwork with the federal government or figure out how a particular problem was solved in the past. "If you think of it as ChatGPT for nuclear," he says, "it's actually not a bad place to start." It's especially important because the nuclear power industry "has a remarkably skilled but quickly shrinking workforce tasked with keeping old reactors online and possibly starting up new ones to meet surging demand for electricity," the article points out. It also stresses that "So far, both the Nuclearn and NIVA large language models used in the nuclear world report to humans and don't go anywhere near power plant operations."

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Could this push solar cell efficiency beyond the theoretical 33% limit? Interesting Engineering reports: Researchers at the University of Groningen in the Netherlands found that tin-based perovskite solar cells can slow heat loss from high-energy "hot electrons..." When sunlight strikes a panel, photons jump-start electrons into action. The most energetic photons create super-charged hot electrons... [but] in fractions of a trillionth of a second, these high-energy particles rapidly cool, dumping their bonus energy as waste heat before ever leaving the solar cell... In collaboration with Maria Antonietta Loi, professor of Photophysics and Optoelectronics, the team created an experimental setup. Using a specialized solar cell material called tin-based perovskite, Loi's lab performed a feat many thought impossible: she slowed the heat loss down by a factor of 1,000. Suddenly, the extra energy lingered for nanoseconds instead of vanishing in picoseconds... To solve the puzzle, Koster and PhD student Tim Faber built digital simulations to peel back the quantum layers. And discovered a surprising double-action mechanism at work... The simulations matched the exact nanosecond delay observed in the lab... These specialized materials could be used to build a new generation of super-efficient solar cells. Tin-based metal halide perovskites are non-toxic, eco-friendly crystalline materials for high-performance solar energy conversion... The material possesses an unusually low electron mass. As a result, electric charges move quickly and retain extra thermal energy for extended periods. This combination of broad light absorption, efficient charge movement, and prolonged energy retention makes these materials prime candidates for next-generation solar panels. "There are many other questions that still need answers," the team said in their announcement, "but in theory, this discovery could allow the creation of more efficient solar cells, beyond the theoretical limit of 33 percent." Thanks to long-time Slashdot reader fahrbot-bot for sharing the article.

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More than 200,000 barrels of low-level radioactive waste were stored on the floor of the Atlantic Ocean between 1949 and 1982, reports ScienceAlert. Whatever happened to those barrels? Scientists have descended to the wreckage in a crewed submersible to investigate — and found many of the barrels corroded and degraded, their contents spilling across the seafloor. Surprisingly, this isn't necessarily a subversion of the original plan... The International Atomic Energy Agency recommends that low-level waste be disposed of in robust containment in isolation for at least a few hundred years — but back in the mid-20th century, the recommendations were a little different. The contemporaneous guidelines recommended that containers needed to reach the seafloor intact and remain sealed only long enough for the short-lived radionuclides to decay. After that, the remaining waste was expected to slowly escape and disperse through the surrounding ocean. Not everything in the barrels would conveniently decay away, however. They contained a radioactive hodgepodge, including cesium-137, plutonium isotopes, and tritium, some of which can persist for thousands of years... [A] few years ago, nuclear engineer Patrick Chardon and marine geologist Javier Escartín of the French National Center for Scientific Research started to wonder what had become of the dumped waste. That question eventually became NODSSUM — Nuclear Ocean Dump Site Survey Monitoring — an interdisciplinary project bringing together nuclear physics, geology, oceanography, biology, and marine chemistry to find the barrels and investigate what, if anything, they were doing to the surrounding environment.... [T]he barrels also appeared to function as tiny oases on the otherwise sparsely populated sandy seafloor. Anemones had attached themselves to the barrels. Sponges, sea cucumbers, fish, and crustaceans lived around them, with crabs apparently particularly fond of the artificial shelters... Instruments aboard the ship detected significant signals of cobalt-60 and niobium-94, which the researchers could specifically link to the dumped waste... [Samples are now being analyzed] There is precedent, however, to suggest that even striking levels of radioactivity around a source don't necessarily spread very far. A recent study of the sunken Soviet submarine Komsomolets found radionuclide levels hundreds of thousands of times above background immediately around the leaking reactor — but those levels dropped sharply within just a few meters as the material dispersed through the seawater. The NODSSUM team similarly found that, despite the significant radioactive signals around the barrels, activity levels weren't high enough to pose major radiation-protection problems for the scientists handling the samples. [Their three-person submersible] Nautile and the instruments it carried showed no signs of contamination. The real achievement was mapping the exact location of the barrels. "None of this means the waste is harmless," the article concludes — but it also doesn't mean we're about to be overrun by radioactive crabs."

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"As parts of the Southern California coastline crumbled into the sea, slammed by intense waves and flooding in recent days, oceanographer Kim McCoy had one thing on his mind," reports the Los Angeles Times. He was thinking about "the nuclear waste set in concrete on the beach near San Clemente at the shuttered San Onofre nuclear power plant." "Rising sea levels, storm waves, El Niño which increases wave height ... these could wash away a section of the walkway that protects the San Onofre seawall, and the waste canisters are just 100 feet away from that," the former wave dynamics researcher and longtime advocate against beach storage of nuclear waste said. Most experts agree the risk of erosion damaging the nuclear waste storage system is extremely low in the near term. The plant's owner, Southern California Edison, has promised the California Coastal Commission to move the waste to higher elevation on-site if modeling shows sea level rise and erosion will start to pose a challenge. But the recent waves, fueled by Hurricane Marie far away in the Pacific, resurfaced the issue of the ultimate fate of the highly radioactive spent fuel that used to power the reactors. "At the moment, it is under control, I think it's essential to say that," said James Day, a geology professor at UC San Diego. "But geologically we must be thinking long term. The waste lasts for hundreds, if not thousands of generations...." [In 2103 some of the site's canisters' approach their intended 100-year lifespans, and the utility may have to start the transfer into new cansiters.] The distinctive twin domes that once housed the reactor cores will start coming down early next year. But the 3.6 million pounds of high-level waste will stay in the coastal community indefinitely. How much of a safety hazard that is depends on whom you ask. "San Onofre is sitting on some fairly young rocks in a seismically active region," Day said at a recent symposium at the Scripps Seaside Forum in La Jolla, hosted by the Samuel Lawrence Foundation. "This is not the sort of place you would leave nuclear waste." Others noted that collapse of beach slopes could make the site more vulnerable to tsunamis. They spoke of the corrosive effects of the ocean air on the steel canisters that hold the waste... Edison says its system will be safe for decades to come. "The maximum credible tsunami here would not even overtake the seawall," said Manuel Camargo, principal manager of decommissioning for Edison, standing on the concrete pad that holds the steel waste storage canisters. "The maximum credible earthquake, somewhere around a 7.0 magnitude, would produce something about half of what this system is designed to withstand...." Edison is bolstering a path below the seawall. Based on state data from the California Ocean Protection Council, the seawall would not be inundated before 2050, Camargo said... Plans for a deep geological repository beneath Yucca Mountain in Nevada crumbled in the face of local opposition in 2011. Utilities around the U.S. now sue the federal government every year to recoup their storage expenses because the Department of Energy has not come through on its promise. The lawsuits cost taxpayers $2 million a day, according to Camargo. "It's so safe that it's almost a problem," Camargo said. "It's not a priority to a lot of folks to move it." "The Trump administration's Department of Energy wants to create 'campuses' in several states to store waste," the article points out, "and, in exchange, give local jurisdictions funding to develop different aspects of the nuclear cycle — such as fuel creation, power generation and potentially fuel recycling..." "The administration wants to address the fact that waste is sitting at 80 reactor sites around the country. It also needs places for waste from new reactors it wants to build."

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The U.S. Department of Energy has approved a $1.9 billion loan to NextEra Energy to restart Iowa's shuttered Duane Arnold nuclear plant, which Google has backed as a power source for its growing AI infrastructure. "The sizable loan is the second of its kind, suggesting that the Trump administration views revived nuclear power as a key source of electricity for tech companies seeking to power their AI data centers," notes TechCrunch. From the report: James Danly, Deputy Secretary of Energy, said that the Iowa power plant's restart in 2029 will "drive down electricity costs," though he did not explain how. Just 50 megawatts will be set aside for the local power cooperative, NextEra CEO John Ketchum said during an earnings call (PDF) last year. That capacity would cover 18% of Iowa's demand growth since 2021, the year before ChatGPT was released. Google is reportedly looking to build up to six data centers near the Duane Arnold Energy Center, which hasn't operated since 2020 when an intense rainstorm damaged the power plant. Rather than repair it, NextEra decided to mothball it. At the time, cheap natural gas was flooding the market, making nuclear power economically unappealing. A lot has changed in the last six years, though. After decades of little growth in demand, the sudden rise of AI coupled with broader electrification of the economy meant that utilities and power providers were suddenly scrambling to find new generating sources of electricity. New data centers are expected to nearly triple the sector's electricity demand by 2035.

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The EV blog Electrek reports: A Clinton Township, Michigan man was charged $418 for a single EV charging session at Elder Hyundai's Macomb Township store after finding the charger listed as publicly available on the EVgo app, but didn't discover the charges until after wrapping up his 40-ish minute charging session. "I was flabbergasted," explained Stanley Kpenkann, who had been driving a rented Chevy Bolt EV at the time. "Never in my wildest dreams did I think I would be saddled with a bill of $418 for a charging session." After calling EVgo to report the error, he found that the exorbitant charge wasn't a mistake at all - Elder Hyundai was charging customers an eye-gouging $5 per kWh, plus another $5 for every minute connected. A local news report notes that "After back-and-forth with EVgo, the company processed what it called a goodwill refund of $405." (And the dealership argued their charger was reserved for its own customers and vehicles, so they set prices high to deter outside use.) But Electrek argues the story "speaks to much larger problems among the EV charging business in particular and car dealerships in general..." [In June] Plug & Play EV's Steve Birkett took to LinkedIn to call out his local Hyundai dealer in Union, NJ for charging a ridiculous $15 per kWh to top off his IONIQ 5 (!)... Even worse, he noted that a number of area dealerships that had listed their ports as "public" were actively discouraging public use with signs and stickers designed to turn people away... [U]nlike gas stations, EV charge point operators in many states aren't required to clearly advertise what they'll charge before a driver plugs in in the same way that gas stations are: with clearly legible signage that's visible from the street.

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A new study published Friday in AGU Advances "depicts the most advanced picture yet of how a rare but massive solar storm could affect some US industries and electric systems more than others," reports CNN. "During a 250-year solar storm, the East Coast would have widespread potential for grid failure." Researchers modeled what a Carrington Event — a 1-in-150-year geomagnetic storm or even rarer — could mean for the modern day. They estimate the US economy would lose about $1.5 billion to $2 billion per day from direct and indirect costs, as millions of people face power outages. The findings show the most vulnerable areas are the Northeast and the Northern Plains, especially locations at higher latitudes. No one knows when the next big storm will hit. While the most severe geomagnetic storms are labeled as once-in-a-century or rarer, these events don't follow a fixed schedule. "That timing only averages out on very long timescales," said Anna Kelbert, a geophysicist at the Harvard-Smithsonian Center for Astrophysics, who was not involved in the study but previously studied solar storm effects on power grids. "The event can occur at any time, as soon as a week from now, or centuries later...." [Shawn Dahl, service coordinator at the Space Weather Prediction Center operated by the National Oceanic and Atmospheric Administration in Boulder, Colorado], said the sun is now coming down from a period of heightened activity, which is also when some of the biggest storms to hit Earth have occurred in the past. "We still need a lot of work to be ready...." "We haven't really seen events like this size in the modern era, where we've had all of this high technology and we've had the power grid of this size," said Ed Oughton, researcher at George Mason University and lead author of the new study... Because the US grid's actual structure is proprietary for security reasons, the team used engineering models to create various network and transformer setups including the 10,464 substations and 16,256 transmission lines found across the country... The grid structure also contributes to higher risk in some areas. For instance, the eastern US is linked together in a single grid interconnection. A voltage issue in Maine, if not isolated early, could cascade through the grid to Washington, DC. The West works similarly, whereas the Texas interconnection operates mostly within the state... Power is restored over time depending on any alternative electrical paths that could bypass the substation or availabilities of spare transformers, for instance. "This nationwide analysis shows that we are currently ill-prepared to face a major magnetic storm, and that the societal impacts would be catastrophic," Kelbert said. "The study estimates power disruptions for 5.1 million people and 135,000 businesses," according to the article, and "The outages could last from hours to days to weeks depending on the damage and resources available to get back online, said Oughton."

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California lawmakers have passed a bill that would legalize plug-in "balcony" solar systems, allowing residents to connect small solar panels directly to a standard wall outlet after completing a simple online registration. The systems would be capped at 1,200 watts and must meet safety requirements designed to prevent power from feeding back onto the grid during outages. KQED reports: The legislation, SB 868, sailed through the state assembly and senate with bipartisan support. The bill now moves to the governor's desk for signature. The devices can be tented in a backyard, hung off a balcony or placed on a roof. Models range from as low as $300 to $2200, depending on size. The bill would open the solar market to people who were previously left out: renters, people with unsuitable roofs, and those lacking the capital to build out a rooftop system, which can cost in the tens of thousands of dollars. [...] If signed into law by Newsom, the legislation would exempt plug-in solar devices from what critics say is a cumbersome and expensive interconnection application process, and replace registration with a free and straightforward online form. [...] The newly passed bill outlines several device requirements. The balcony solar systems must be capped at generating 1,200 watts per home, plug into a standard outlet, offset a customer's onsite electricity use and meet state and national electrical codes. They also must be certified by an outside safety organization like Underwriters Laboratories and have a feature that would prevent electricity from feeding back into the grid if there's a power outage.

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Falling prices have made grid-scale storage batteries more attractive, reports Bloomberg. But after decades of stagnant investment, America's grids "are racing to make the upgrades needed to plug them in," with supplies straining for the necessary equipment. Demand for batteries has skyrocketed as electricity use across the U.S. swells, driven by data centers' booming energy needs and increasing electrification. It's also getting harder to get them connected to power grids... As those upgrades get delayed, storage projects are piling up in interconnection queues from coast to coast. For example, Consolidated Edison Inc., a major utility in New York state, says over the last two years the volume of battery storage projects waiting to be connected has grown by 300%... "The whole process of interconnecting these new power plants got really log-jammed and bottlenecked," said Joseph Rand, an energy policy researcher at the Lawrence Berkeley National Laboratory... Nationwide, some 750 gigawatts of energy storage projects — roughly equivalent to the generating capacity of more than 700 nuclear reactors — are in line to get grid connections, according to the lab's research. Not all of these projects will get built. Many developers already abandoned the queue because of delays. Still, the waiting time is increasing; the median was five years in 2025, up from a year and a half in 2015. The flood of battery projects is expected to continue. Wood Mackenzie, an energy consultancy, projects the U.S. energy storage market will quadruple in the next six years... [Shortages in key equipment] have driven up construction costs and time lines for grid upgrades, leaving utilities struggling to build fast enough. A drought of skilled workers is further slowing them down... In California, PG&E Corp., the state's largest utility, told regulators in January that a key driver of delays was long lead times for specialized equipment. Procuring certain breakers could take nearly four years, according to the utility, which reported a 300% increase in its interconnection workload compared to prior years. In Northern California, for example, holdups to circuit breaker upgrades to a substation in Solano County led to projected delays for two battery projects worth a combined 450 megawatts. Transmission line work in the Bay Area has put another 800 megawatts of energy storage at risk of delay, according to PG&E. Last year New York's Con Ed started requiring developers to help pay for upgrades if their projects will push power demand and strain infrastructure. But that also drew criticism: According to a survey conducted by the trade group New York Battery and Energy Storage Technology Consortium (NY-BEST), the new methodology raised costs by an average of $21 million per project, a 14-fold increase. At least 25 projects have been canceled as a result, according to the group. Battery advocates have appealed to state regulators to get Con Ed to abandon the new policy. Thanks to Slashdot reader Bruce66423 for sharing the news.

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AleRunner writes: "Solar has been doing the 'heavy lifting' to help Europe meet its energy needs amid a string of blistering heatwaves," Euronews tells us. Meanwhile, as Europe's energy demands rise with the heat, jellyfish have been causing shutdowns and reduced power output at multiple reactors at French nuclear plants, as we already discussed. Euronews reports: A new analysis from energy think-tank Ember found that solar output in European countries rose by up to 17 percent on heatwave days in June and July. Researchers say that this helped power the grid as electricity demand increased by as much as a quarter on hot days. Heatwaves often trigger a spike in electricity consumption due to the sudden need for cooling, mainly from energy-intensive air conditioning (A/C) units. The International Energy Agency (IEA) estimates that space cooling, which is mostly A/C units and fans, consumed around seven percent of the world's electricity in 2022. Even in countries where A/C ownership is low, countries experience energy demand spikes when scorching temperatures hit. During the early summer heatwaves of 2025, France, for example, recorded an evening electricity peak that was 25 percent above the off-season average due to air conditioning. Ember's analysis found that during the late-June heatwave this summer, daily electricity demand rose byup to 28 percent in Italy, 23 percent in Hungary, 14 percent in France and 13 percent in Spain compared with pre-heatwave days. It says as heatwave-driven demand increased, solar was the only major power source to perform "better than usual." Compared with other days in June and July, average daily solar generation during the heatwaves was 17 percent higher in France and Hungary, five percent higher in Spain and the same in Italy.

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