This Week’s Fusion News: December 12, 2025

by | Dec 12, 2025 | Fusion Energy

Things You Gotta Know

How AI Will Help Get Fusion From Lab to Grid by the 2030s
The International Atomic Energy Agency reports that fusion energy has entered a “decisive phase,” with MIT modeling projecting output growth from 2 TWh in 2035 to 375 TWh by 2050. The Google DeepMind and Commonwealth Fusion Systems partnership, announced alongside the October DOE roadmap, will apply reinforcement learning and the TORAX plasma simulator to optimize SPARC reactor operations. US Energy Secretary Chris Wright emphasized AI’s potential to accelerate materials science and fusion modeling, calling its catalytic effect “hard to overstate.” 

AI, Quantum Computing, Fusion Energy Remain Energy’s Top Research Priorities
DOE Undersecretary for Science Darío Gil testified before the House Science Committee on the agency’s technological priorities, describing the Genesis Mission as a Manhattan or Apollo-scale project that will integrate national laboratories, academia, and industry partners. Gil unveiled initial investments of $320 million for the American Science Cloud and Transformational Model Consortia, both created through the One Big Beautiful Bill Act. He characterized the convergence of AI and quantum computing as “a scientific and technological revolution” and vocalized support for the stalled National Quantum Initiative Act Reauthorization. On fusion, Gil said the department is working with private sector and academic stakeholders on scaling fusion power plants in the early 2030s, following the October release of a formal DOE roadmap.

How ITER Quantifies Fusion Power
ITER’s neutron diagnostics team is developing a hybrid calibration approach that combines direct measurement with Monte Carlo simulations to accurately measure the facility’s target 500 MW fusion output. Diagnostics engineer Silvia di Sarra explained that compact neutron generators will be deployed inside the vacuum vessel using remote handling, producing neutrons with well-known properties to calibrate detector readings. For areas the sources cannot reach, the team will use detailed CAD-based neutronic models to extrapolate detector response. The calibration window falls between assembly completion and integrated commissioning in five to six years, and extensive pre-studies are underway to optimize source placement and minimize machine downtime.

Japanese Supermarket Chain Signs Up for Fusion Power
Helical Fusion signed Japan’s first fusion power purchase agreement with Aoki Super, a 50-store supermarket chain in Aichi Prefecture that made a strategic investment in the company in July 2025. Founded in 2021, the Tokyo-based fusion company is building on National Institute for Fusion Science research on the helical stellarator design. Helical Fusion targets practical power generation in the 2030s with its Helix KANATA plant.

Germany Shifts to Nuclear Fusion After Fukushima-Era Fission Policy
Germany is pivoting sharply from its post-Fukushima anti-nuclear stance to backing fusion research as a key component of its clean energy future. The move contrasts with Berlin’s 15-year retreat from nuclear fission and reflects increasing confidence in fusion technology following reproducible ignition experiments at Lawrence Livermore National Laboratory. Focused Energy CEO Thomas Forner says fusion power could be operational within a decade if a reliable industrial supply chain can be built, and the company is partnering with German utility RWE to accelerate deployment.

Helical Fusion Secures $5.5M Funding, Signs Japan’s First Fusion Power Purchase Agreement

Helical Fusion closed a $5.5 million Series A extension and signed Japan’s first fusion energy power purchase agreement with supermarket chain Aoki Super, validating both its technical roadmap and commercial demand for stellarator-based power. The deals position the Tokyo-based company as Japan’s leading private fusion contender under Prime Minister Takaichi’s national energy strategy.

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