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US-based Thea Energy Unveils Helios Stellarator Fusion Power Plant Design

On September 9, 2026, Thea Energy, Inc., a fusion energy company based in Kearny, New Jersey, announced that 16 peer-reviewed papers on its Helios fusion power plant design had been published in a special issue of Fusion Engineering and Design (FED). The special issue, titled "Thea Energy's Helios Stellarator Power Plant Design," presents the Helios architecture and its key engineering solutions. According to Thea Energy, Helios is a stellarator fusion power plant architecture oriented toward commercial deployment requirements, integrating magnet coils that can be controlled by software to adapt to actual operating conditions, a stellarator divertor exhaust system for continuous fusion power generation operations, and a sectorized maintenance scheme supporting long-term operation...

2026-09-10

South Korea launches design of 250 MWe sodium-cooled fast reactor Helios

The Korea Atomic Energy Research Institute (KAERI), in collaboration with Hyundai Engineering & Construction and KEPCO E&C, has initiated the design of the next-generation sodium-cooled fast reactor Helios. The reactor is planned to have an electrical output of 250 MWe, based on the existing 100 MWe-class sodium-cooled fast reactor Salus-100 design, targeting large-scale power consumption applications such as AI data centers and industrial parks. Lee Je-hwan, head of the Fourth Generation Reactor Technology Development Department at KAERI, stated that future demand for large-scale carbon-free electricity around AI data centers and industrial parks...

2026-07-30