A "massive influx" of jellyfish forced Electricite de France SA to shut three units at its Gravelines nuclear power plant this week and reduce output at a fourth, reports Bloomberg. Just as summer temperatures surged, 3.2 gigawatts went offline — and the power utility was already facing cuts other nuclear sites as high temperatures reduced the river water available for cooling. More details from ScienceAlert: As Politico reports, the Gravelines nuclear power plant spent hundreds of thousands of euros in 2025 to stop this happening again, only to see a repeat 12 months later... Increasing temperatures in the water can produce more of the plankton and animals that jellyfish feed on, as well as accelerating life cycles and extending breeding seasons.... It's not just jellyfish that have a habit of disrupting human energy infrastructure. Last year in Connecticut, a single raccoon caused more than a thousand power outages, as reported by CT Insider. It's not clear exactly what the raccoon did, but we do know it somehow got into a substation and caused damage to the equipment in there. The unwitting act of sabotage left more than 2,500 customers in the area without power at one stage — though repairs were swiftly carried out. Reuters reported Tuesday on how the French utility responded to their jellyfish swarm: EDF has installed fixed cameras at the intake canals and on the filter drum screens to detect any incoming blockages as soon as possible, an engineer told Reuters... The company has also partnered with a French fishing organisation and a sea rescue organisation, which monitor for swarms and can raise an alert to launch targeted trawling operations by fishermen to reduce the swarm's density before it reaches the plant, the engineer said. The fishing boats were deployed [last] Saturday after an initial alarm was raised, limiting the impact from the swarm. The jellyfish that are already on site are being removed with vacuum trucks, he said. No new jellyfish are arriving, so cleanup is finishing, which should lead to a quick restart of the units, they added... Scientists warn such events could become more common due to factors including global warming, the arrival of invasive species, habitat loss of predators and over-fishing. Thanks to Slashdot reader Bruce66423 for sharing the news.

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"In a milestone for energy storage technology, Peak Energy has selected Sacramento, California, as the home of America's first manufacturing facility dedicated to grid-scale sodium-ion battery systems," according to the sustainability news site Intelligent Living. The move "represents the first large-scale test of whether sodium-ion technology can deliver on its promise of cheaper, safer, and more sustainable grid storage at a scale that actually moves the needle for the U.S. electricity system." The 183,000-square-foot plant, representing a $71 million investment, will produce up to 4 gigawatt-hours of storage annually when production begins in early 2027. That is enough output each year to serve nearly four million homes, and it signals that sodium-ion technology has moved from laboratory promise to commercial reality... Peak Energy, founded in 2023 by former engineers from Tesla, Enovix, and Fluence, announced its Sacramento site selection on July 8, 2026, after a nationwide search that ultimately chose California over Texas... The factory is designed as a system assembly plant rather than a cell fabrication facility. Peak will receive sodium-ion cells, manufactured to its specifications by Chinese suppliers, and assemble them into complete 30-foot-long, 100,000-pound containerized storage systems. Each GS1.1 unit stores 3.1 megawatt-hours, enough to fully charge more than 40 electric vehicles... In the United States, Peak Energy has emerged as the most advanced grid-scale player. It has secured more than 6 GWh of customer commitments, including a landmark deal with Jupiter Power for up to 4.75 GWh through 2030, valued at up to $500 million. Energy Vault has committed to 1.5 GWh of sodium-ion storage for AI data center applications, and RWE Americas has already deployed Peak's first grid-scale system on the MISO grid in Wisconsin, energized in March 2026. General Motors is codeveloping sodium-ion cells with Peak at its Wallace Battery Cell Innovation Center in Michigan, testing 170- and 190-amp-hour cell formats with domestic production targeted for 2028. China, however, remains the global heavyweight. CATL, the world's largest battery manufacturer, unveiled its TENER Sodium energy storage system in June 2026 with a rated cycle life of 15,000 cycles and a projected 25-to-30-year service life. In April 2026, CATL signed a 60 GWh supply agreement with HyperStrong, the largest sodium-ion deal announced to date. BYD, HiNa Battery, and Farasis are also shipping commercial sodium-ion products, including batteries for a $400 electric scooter already on sale in China... Peak Energy's first commercial shipments from Sacramento are slated for the first quarter of 2027, with contracted deliveries to Jupiter Power, Energy Vault, and RWE Americas following shortly after. The company has publicly stated it needs to deploy over $100 million in product in 2026, up from roughly $10 million in 2025, and the Sacramento facility is sized to meet that demand. At the system level, sodium-ion grid storage is already operating. Peak's pilot installation at the SolarTAC testing facility in Watkins, Colorado, stores 3.5 MWh and has been running since 2025. The RWE Americas deployment in Wisconsin, energized in March 2026, marks the first time sodium-ion batteries have backed up the MISO grid, which serves 15 central U.S. states and the Canadian province of Manitoba... According to the International Energy Agency, sodium-ion manufacturing capacity announcements have accelerated sharply since 2024, with global pipelines now exceeding 400 GWh annually... Researchers are also pushing the technology forward. In May 2026, a team at the National University of Singapore published a breakthrough in all-solid-state sodium batteries that could further reduce costs and eliminate the flammable liquid electrolytes found in both lithium-ion and current sodium-ion designs. "The technology's sweet spot is utility-scale, multi-megawatt-hour installations," the article points out, "where the system-level cost savings from passive cooling and longer cycle life outweigh the per-cell energy density penalty..." The article also points out observations from the American Battery Leadership Coalition, an industry group advocating for sodium-ion policy support, that sodium-ion batteries can be built almost entirely from American materials, including coal, sawdust, and agricultural waste. This week Syntropic Power and UNIGRID Inc. also announced "a major partnership to commercialize UNIGRID's proprietary sodium chromium oxide (NaCrO2) battery technology across North America," reports Interesting Engineering, "targeting one gigawatt-hour (1 GWh) of deployments in 2027. The technology could be used in residential, virtual power plant, and large-scale stationary grid applications..." Independent testing by the ISO-accredited Rochester Institute of Technology (RIT) Battery Development Center revealed something surprising. UNIGRID's 210Ah cells displayed endothermic behavior during charging. This means the chemical reaction actually absorbs heat rather than dumping it into the environment. Coupled with a 97.9% cell-level round-trip energy efficiency and remarkable thermal stability under abuse testing, the battery stays cool on its own. The 210Ah sodium-ion cells deliver up to 218Ah of discharge capacity. It demonstrated exceptional durability, retaining over 99% of its capacity after 1,000 full discharge cycles, as well as heat-absorbing behavior during charging. These validated strengths allow Syntropic to optimize its product designs, enabling platforms like GridSpan [its modular DC platform designed for large-scale energy applications with flexible discharge durations ranging from 20 minutes to 20 hours] to operate safely and efficiently at grid scale without needing complex mechanical cooling systems... Commercialization kicks off with Tenet, a safety-focused, wall-mounted system for residential, light-commercial, and virtual power plant uses... Relying on abundant and widely distributed raw materials like sodium and chromium — rather than lithium and cobalt — protects manufacturers from geopolitical price spikes and material shortages. Apart from offering an alternative to lithium, a successful rollout will demonstrate that the most durable energy storage is the kind that could stay cool entirely on its own. Thanks to Slashdot reader fjo3 for sharing the news.

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An anonymous reader quotes a report from the BBC: German energy company RWE has said it will abandon its offshore wind projects in the U.S. after reaching a $1.2 billion payout deal with President Donald Trump's Department of the Interior (DoI). RWE said that it will now reinvest the sum into conventional gas projects, including $900 million in a liquefied natural gas (LNG) export terminal project in Louisiana. "After careful consideration, it was determined there is no path forward to permit these projects in the US for the foreseeable future," the company said in a statement. RWE said it has agreed to relinquish its leases off the California and Louisiana coasts as well as in the New York Bight. Overall, the German firm plans to invest approximately $19.6 billion in the U.S. over the next six years "to grow its generation capacity." Interior Secretary Doug Burgum said in a statement posted on X that Americans deserve an energy system built on common sense and not one dependent on "costly subsidies." "We welcome RWE's agreement and voluntary investment in projects that strengthen our nation's energy security," he added. Earlier this year, the DOL reached a deal with TotalEnergies putting an end to the French company's offshore wind projects in the U.S. "Instead, the firm agreed to reroute investment to build a LNG plant in Texas and to develop 'upstream conventional oil' in the Gulf of Mexico," reports the BBC. Another similar deal was signed with Charlotte-based Duke Energy last month to terminate the company's offshore wind lease in the Carolina Long Bay area.

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An anonymous reader quotes a report from Ars Technica: Nowhere is the US data center boom bigger than in Texas. But less than a year after declaring Texas the "epicenter of AI development," Governor Greg Abbott has declared a moratorium on all new power grid connections for data centers -- at least until developers provide more information about their projects' potential impacts on the grid and communities. The Republican governor directed regulators in an August 3 announcement at the Public Utility Commission of Texas and the grid operators at the Electric Reliability Council of Texas (ERCOT) to perform a "comprehensive verification and audit of all data centers advancing through ERCOT's interconnection process." As an independent system operator, ERCOT oversees a power grid that operates separately from the rest of the United States and provides services to most of Texas. Texas has aggressively courted data center development with its availability of cheap land and relatively abundant energy resources, along with offering state incentives, like tax breaks and fewer regulations. That puts the state on track to surpass Virginia in becoming the largest US data center market. But the recent AI boom and the accompanying frenzy of data center development threaten to overwhelm the Texas grid on paper, despite the state leading the country in adding new power generation. The ERCOT interconnection queue currently includes more than 1,800 projects representing over 474 gigawatts' worth of requests to connect to the Texas grid -- more than five times Texas' record peak electricity demand -- and about 90 percent of those power connection requests come from data centers. "That unprecedented load growth could endanger the reliability and stability of the Texas electric grid," according to the statement from Abbott's office. Many of those data center projects may never materialize for various reasons. But ERCOT has still forecast that data center demand and other factors could drive statewide electricity demand to double the current demand record by 2032, according to The Texas Tribune. The review will examine each project's projected electricity consumption, reliance on the grid and state incentives, ownership, and water use. It will also assess measures intended to "reduce impacts on neighboring property owners and communities," including noise controls, lighting, traffic improvements, setbacks, and emergency planning. Ars Technica notes that the directive does not address air pollution or greenhouse-gas emissions and does not apply to data centers generating their own power on-site.

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