JET cost so far £25bn ?22 Feb 2021 22:56
Nuclear fusion experiments with deuterium and tritium at the Joint European Torus are a crucial dress rehearsal for the mega-experiment.
“We’ve had to refresh and renew all of our processes”, from storage to handling, Chapman says. Once tritium experiments start, neutron bombardment will make the inner facility radioactive, so it will become a no-go zone for humans for 18 months. Staff have therefore had to get used to a mindset similar to that of the engineers who send craft into space: “You can’t just go in and fix things, it has to work first time,” Chapman says.
https://www.nature.com/articles/d41586-021-00408-1