The Pebble Bed Reactor

The pebble reactor is a possible alternative to nuclear power. These pebbles are helium cooled and graphite moderated reactors. The fuel is in the form of tennis ball shaped pebbles. Pebbles start at the at the top of one of the veesels and slowly makes it way down and when they reach the bottom, they are removed. Using a gas like helium for the cooling in this system, makes the reactor systems more simple. I think this could be a good alternative if they make it the way that they say in the article. I don't know much about nuclear power but it sounds more efficient then methods we are using today because of them using the helium and graphite. It seems kind of risky though because they tested it a little while back in the 60's and they didn't get good results from it, so we will just have to see.