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Four Nuclear Reactors Hit a Big Milestone in the US

MIT Technology Review | Energy Production

Four Nuclear Reactors Hit a Big Milestone in the US

“Last year the Trump administration set a goal to see three new microreactors achieve criticality, a technical milestone establishing that a reactor can sustain a chain reaction, by the nation’s 250th birthday. And just in time, four reactors did so.

It was a lofty goal, and seeing not just three but four companies meet it is certainly a positive sign for emerging nuclear technologies at a time when the world is facing increased need to increase electricity supply…

The speed with which these companies hit this milestone is impressive, especially in an industry known for massive projects that frequently blow past deadlines and stated budgets. (Valar, Antares, and Aalo were all founded in 2023, and Deployable started in 2025.) But reaching criticality and running a reactor that can produce electricity are two totally different things…

Now, with the completion of this program, the companies will need to continue their work to make power, which could involve some big technical challenges.”

From MIT Technology Review.

Yale Environment 360 | Energy Production

The World Adds a Third Terawatt of Solar Power

“In March, the world passed a major energy milestone, adding its third terawatt of solar power. Increasingly, poorer countries are leading the shift to solar, analysts say.

It took nearly seven decades, after the invention of the silicon solar cell in 1954, for the world to install 1 terawatt of solar capacity, conceivably enough to power the entire United States. After passing that milestone in 2022, the world added its second terawatt in 2024 and its third in 2026, Bloomberg reports.

BloombergNEF expects installations will continue apace, with the world hitting 9 terawatts of solar power by 2036. Analysts project that, by that date, poor countries will have installed more solar power than rich countries, China notwithstanding.”

From Yale Environment 360.

Reuters | Energy Production

China Now Generates Less than Half of Its Electricity from Coal

“China, the world's largest coal consumer, generated less than 50% of its ​electricity from the fossil fuel in the six months to June, marking a first ‌for the country, which has been promoting the use of renewable energy, officials said.

Coal's share of the power mix was 49.7%, Xing Yiteng, deputy director general of the energy administration's development and planning office, told a press conference on Thursday.”

From Reuters.

US Energy Information Administration | Energy Production

New LNG Terminal Expands North American Export Capacity

“Energia Costa Azul, the second liquefied natural gas (LNG) export facility in Mexico, shipped its initial cargo from Phase 1 of the terminal on July 8, according to the project developer. The completion of the project adds 0.4 billion cubic feet per day (Bcf/d) of nominal export capacity from a single train, tripling Mexico’s LNG export capacity. The facility is the first terminal in Mexico and the second in North America, following LNG Canada, to be located on the Pacific Coast, boosting North American export capacity there to 2.2 Bcf/d. The Pacific Coast location allows for shorter shipping routes to importers in Asia.”

From US Energy Information Administration.

Yale Environment 360 | Water Use

After Decades of Drought, Water Is Rising in the African Sahel

“Near-extinct oryx are returning. Farms are prospering as irrigation water reaches fields for the first time in decades. Farmers are even nurturing new trees on their land. Once a byword for drought and famine, the African Sahel region on the southern flank of the Sahara Desert now has more water than it has for decades. Wells are filling as water tables have risen by 13 feet or more in places. Lake Chad, which was one of Africa’s largest expanses of water before shriveling during the droughts, is recovering.

Over years of drought in the late 20th century, the sun hard baked the soils of the Sahel. Now, erratic but extreme rains are returning to this semi-arid region, causing lethal floods but also replenishing rivers, filling desert depressions, restoring water to dried riverbeds known as wadis, and sluicing rainwater off impermeable soils directly into aquifers. The process began in the 1990s but has accelerated in the past five years…

But increased rainfall since the drought years of the 1970s and 1980s explains only some of the rewetting of the Sahel. It cannot fully account for the transformation, say researchers. Also driving the rewetting, they posit, are changes to the land surface, ranging from the internationally funded Great Green Wall project to the revival of traditional water harvesting methods and the chaos caused by jihadist militants, which has led to the abandonment of irrigation projects that once emptied rivers of their flows.

Much remains unclear in these remote lands on the edge of the Sahara Desert, but the trend seems set to be long-term, with climate scientists saying more — and more extreme — rainfall is on the way in the 21st century. As underground water reserves revive, some are forecasting an agricultural renaissance.”

From Yale Environment 360.