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Thanks Migeru. So reactor 2 has had an explosion below it, and breached the wetwell. The drywell at reactor 2 is depressurised, and so at atmospheric pressure.

And Richard Lahey thinks that the core may have "melted through the bottom of the pressure vessel in unit two, and at least some of it is down on the floor of the drywell"

Have I got all those bits right?
And we have a Mark 1:
and this: (click each to enlarge)

So are the contents of both the wetwell and drywell now exposed to the air inside the outermost reactor building, and there may be corium in the drywell - is that right? (or have I completely misunderstood?)

by LondonAnalytics (Andrew Smith) on Thu Mar 31st, 2011 at 04:09:24 AM EST
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