Just in case you think Fukushima has gone away!
Nuclear Cores and Spent Fuel Pools Have Both Lost Containment
The Japanese basically lied about what happened with the reactors for months. They said they were trying to prevent a meltdown, when in fact they knew within the first couple of days Reactors 1, 2, and 3 at Fukushima Daiichi had melted down, and they actually melted through the steel containment vessels.
So there was a worst case scenario that they were trying to hide, they even knew that at that time enormous amounts of radiation were released over Japan and some of it even went over Tokyo […]
The melted core cracked the containment vessel, there really is no containment. So as soon as they pump the water in it leaks out again.