BTW, the correct term is "formerly molten".
Did you ever see a liquid "stand still" -- in the form of a "waterfall" for years?
Besides, if that corium were still "molten", that pipe (and the floor) would be long gone...
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And, yes, those Russians are definitely some heroic and ballsy folks!! And the Japanese who are in there with that mess are right up there with them...
I was just reinforcing that the once-molten core in #2 has solidified again -- just as at Chernobyl...