See also Americans dismissing molten salt reactors because traditional nuclear blew up

Molten salt reactors cannot explode. When the fluid heats up, it expands. When it expands, the particles are further apart and react less. It’s self correcting. And even if by a miracle the fluid didn’t expand, there’s a plug that melts and drains all the molten salt into a safety system where it’s channeled far away from the rest of the mass and cannot react. And in fact, even if you look at the safety data on traditional nuclear, it’s actually less dangerous per watt generated than solar energy. Because solar technicians sometimes fall off roofs and get injured. Nuclear causes less injury and death than people falling off roofs.