irradiating the land you aim to occupy is such a good plan.
I think we can do at least as well as the Egyptians did a few thousand years ago when they buried their kings/gods. That would be a legacy ;)
Think about a couple of reinforced concrete pyramids ;) Of course we could also go for deep, deep sea storage, or (when we finally build a space elevator) we could chuck it back at the greatest local nuclear reactor of all - the sun.
Oh, and the minor point that most fission power stations have some quite significant defences (in the form of concrete and steel).
Looking around the area one of the safest places to be was inside the power plant - new information indicates that the tsunami was twice the height of the defence design specification. There have been a handful of "normal" deaths (i.e not related to ionising radiation sources).
The buildings survived rather well - the shutdown was well in progress when the tsunami took out significant amounts of the infrastructure (but still not the buildings)
We should carry on building nuclear reactors as safely as we know how, we should look at non-weapons tech to build safer reactors still. We should look at mini plants (substation sized).