Construction begins on Kairos’s fluoride salt–cooled test reactor

July 30, 2024, 3:00PMNuclear News
Workers begin construction at the Hermes site in Oak Ridge, Tenn. (Photo: Kairos Power)

Earlier today, on a site in Oak Ridge, Tenn., that was formerly home to the K-33 Gaseous Diffusion Plant, Kairos Power marked the start of construction on its low-power demonstration reactor. Named Hermes, the 35-MWt test reactor claims status as the first Gen IV reactor to be approved for construction by the Nuclear Regulatory Commission and the first non–light water reactor to be permitted in the United States in more than 50 years.

To continue reading, log in or create a free account!

Related Articles

X-energy begins irradiation testing at INL

November 12, 2025, 3:01PMNuclear News

Advanced reactor and fuel developer X-energy has officially begun confirmatory irradiation testing at Idaho National Laboratory on its TRISO-X fuel. The testing, which is taking place over the...

My story: Abraham Weitzberg, ANS member since 1962

November 25, 2025, 9:31AMANS NewsAbraham Weitzberg

My first exposure to nuclear engineering was in 1956–57 when I was a fourth-­year chemical engineering undergraduate at MIT. The previous summer, I worked at an oil refinery in New Jersey...