[Razzz42]

Basically, the way I understand it is, nuclear power results from a controlled nuclear explosion.

If a nuclear reaction is occurring inside of a reactor, what happens if it goes uncontrolled? Of course knowing there is not a concentration of nuclear material or an imploding capability even if there was. Or is a RPV a crude bomb within itself?

Chopper pilots reported seeing blue beams from the cores during flyovers besides byproducts being picked up by sensors and from samples that support criticality, it is a given in a meltdown.

[raygun]

If blue flash are indeed occuring at Jukufima we’re hosed.

[aruanan]

Basically, the way I understand it is, nuclear power results from a controlled nuclear explosion.

A bomb set off in a pile of uranium is not a nuclear bomb. It may be dirty and highly radioactive, but it's not a nuclear explosion. Nuclear power is from controlled fission. A nuclear explosion results from a huge amount of fissioning in a very short period of time. Power rods in a nuclear power plant, whether melted or not, at about 3% enrichment do not have a sufficiently high concentration of fissionable material for this to occur. They would have to have about 30X higher concentration than they do and it wouldn't happen spontaneously: it would take a highly engineered device with critical timing to result in a nuclear explosion.