We do not have a lot of concrete information.
We know that radiation levels spiked last night. We know that they reported a hydrogen blast in reactor#2. The outer part of the primary containment zone....the torus apparently has a hole in it.
The radiation levels went up about that time. But then subsided. Then all of a sudden, the Japanese PM and Senior Cabinet dude announced that yet another reactor was on fire (#4) with even higher radiation readings. We are not sure where the radiation is coming from.
Is the radiation coming from:
A) Reactor #2 that has been reported to have a breech in the second level of primary containment after a blast yesterday. This is the torus surrounding the supposedly sealed reactor. We don't know many facts.
B) Reactor #3's secondary containment building exploded the other day. (similar to #1). #3 is unique in that it was the only reactor burning MOX fuel. MOX fuel is recycled Uranium and Plutonium from bombs. That fuel is different from all the other reactors and is much more dangerous & toxic.
C) Reactor #4 was on fire last night about the same time radiation levels went through the roof. Today, they claim they have put out the fire and that the spent fuel rods in the cooling pools in reactor #4 were only at 84 C. It takes >600 C. before the Zirconium cladding can spontaneously ignite.
I think the spent fuel pools on the top of reactor #3 are the current source of radiation. It's just a guess and this is entirely speculation. #3 is a MOX reactor, this is much more nasty than straight Uranium fuel.
It's possible that #2 is the only breech and solely responsible for the radiation release. To little information to decide right now.
I think the Japanese Government needs to find out what is happening and to tell the people right away. The longer they wait, the more their stock market will crash. This is not a disaster you can cover up. Be honest, everyone will thank you.
Hoping to find out the truth.