"Corium Coolability Under Ex-Vessel Accident Conditions for LWRs"

The paper was written by the scientists in the Nuclear Engineering Division at the Argonne National Laboratory and published in Nuclear Engineering and Technology in June 2009.

That's exactly what has happened at Fukushima, 3 "ex-vessel" accidents.

Link to the paper, FYI: http://article.nuclear.or.kr/jknsfile/v41/JK0410575.pdf