French nuclear regulator halts assembly of huge fusion reactor | Science

France‚Äôs nuclear regulator has ordered ITER, an international fusion energy project, to hold off on assembling its gigantic reactor until officials address safety concerns. This month, the ITER Organization was expecting to get the green light to begin to weld together the 11-meter-tall steel sections that make up the doughnut-shaped reactor, called a tokamak. But … Read more