Here's some more things to ponder:

Japan's chief cabinet secretary Yukio Edano told reporters earlier on Sunday that a partial meltdown in Unit 3 at the Fukushima facility was "highly possible".
"At the risk of raising further public concern, we cannot rule out the possibility of an explosion (another hydrogen explosion?)," Edano said. "If there is an explosion, however, there would be no significant impact on human health.

I wouldn't feel reassured by the above statement, especially combined with the new statement from NIRS:

Update from Nuclear Information Resources Service (NIRS):

UPDATE, 5:30 pm, Saturday, March 12, 2011. Reuters is reporting that Fukushima Daiichi Unit 3 has lost cooling capability: http://www.reuters.com/article/2011/03/12/us-japan-quake-nuclear-cooling-idUSTRE72B3GI20110312

This is of particular concern since, unlike all of the other reactors in trouble, Unit 3 has been using plutonium-based MOX (mixed oxide) fuel since September 10, 2010. Consequences of an accident at a MOX-powered reactor would be even more severe than at a more typical uranium-powered reactor...

Ugh!

Charley Noble