Nuclear power is currently predominately based on uranium fuel. This is an issue for two reasons. Uranium reserves are limited, and should nuclear power become widely used, economically extractable reserves would run out within decades. Secondly, the current 400 odd reactors in the world are producing high level waste at a rate far exceeding the rate at which long term solutions for handling this waste are being planned. The industry has acknowledged these problems, and the International Atomic Energy Association (IAEA) sometimes refers to uranium based nuclear power as a ‘bridging technology’.
One alternative put forward is thorium. There are about four times more known thorium than uranium reserves and a thorium reaction works differently, so the fuel lasts longer. Continue reading