Earlier this week, TEPCO tried to fill the reactor 2 containment with water. That didn't work. So, they OPENED the containment and released BILLIONS of lethal doses of radiation. Now they are wondering whether there is any water left in the bottom of the containment. Let's help them. Since the bottom of the reactor is hot enough to melt concrete, and IS melting concrete, and no steam is coming out of the reactor, here's why:
The core of Reactor 2 is still in at least intermittent fission and has melted through the bottom of the containment. Thus, there is a hole in the bottom of the reactor where the core is melting through - it's several thousand degrees down there. Water pours through holes and what doesn't boils at 212 degrees. So there is no water in the bottom of the reactor.
Then they tried to toss in some instruments but, of course, they melted - like their little helicopter and their robot - which was built to go into reactors, except no one bothered to see if it would work BEFORE IT WAS TOO LATE - which it didn't.
Now they are going to pump liquid nitrogen into the core of reactor 2. Liquid nitrogen freezes at -346 degrees F and boils at -321 degrees F. A 25 degree F difference. First, they will probably never actually get any liquid nitrogen near the core - it will boil away immediately upon being pumped into the containment (they tried it at Chernobyl - it didn't work there, either).
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