One scientists stated this should be done from the beginning. What took them so long?
30/3
Japan Ready to Bury the Problem, Following News of Uncontrolled Reactor 1 Chain Reactions
As for what happens after a concrete tomb, which increases the surrounding pressure by orders of magnitude, is put over what now appears is still a live fision reaction, well, we won't make any predictions. Suffice to say if historical precedent of how TEPCO has handled this situation to date is any indication, expect the sarcophagus to crack, and a 100 km "No Live Zone" radius to be extended around Fukushima in perpetuity.
