Why not just bury them?

The idea of smothering and sealing the overheated nuclear reactors at the Fukushima No. 1 facility in sand or concrete to stop the crisis is appealing. But experts say it is too early for something that desperate and it could be a big mistake that could worsen matters.

Most urge continuing the current efforts to cool the radioactive material, and at least one suggested massive spraying to hold down radioactive dust.