Few points: There are multiple reactors, each larger than Chernobyl, including the fuel rods in unit 4 which was down at the time of the accident so the fuel i

Few points: There are multiple reactors, each larger than Chernobyl, including the fuel rods in unit 4 which was down at the time of the accident so the fuel isn't spent. The real worst worst case is that loss of cooling causes a containment breach, the fuel melts through the bottom and contacts ground water, causes a steam explosion which is able to spread material over a decent distance. This would be comparable to Chernobyl. As the whole world is pulling for the workers doing their best to prevent such a scenario it's not too likely but it is not out of the question. We've already experienced failures at these reactors that were previously considered enough to be impossible.