Fission reactions can be relatively steady state, explosive, or declining.
The official word has been that all fission at Fukushima has been declining (even when Tepco refuses to describe it as fission)
Now, the hydrogen level is rising fast in reactor 2.
Does that mean that the fission is no longer declining?
Is fission now increasing in activity?
This fall Potrblog suggested that the coriums were in a "dance with the devil" where the critical chains would start expanding, and then get slowed down in a process of sub-atomic poisoning.
"Fukushima Re-criticality Neutron Feast and Famine Cycle: Dancing With the Devi" October 23 2011" http://pissinontheroses.blogspot.com/2011/10/fukushima-re-criticality-neutron-feast.html
Majia here: I'm interested in people's opinion whether or not the hydrogen build-up is, as both both Mark and Steve suggest below, indicative of a building critical chain of fission reactions?
We know that unit 2 is the devil, but have Tepco workers' efforts to keep it cooled failed?
I wonder how many worker lives have already been lost due to that particular reactor, let alone the others...?
Here are the relevant headlines and excerpts from Steve's and Mark's comments found at Enenews:
Enenews: Hydrogen levels now quadruple at Reactor No. 2 http://enenews.com/hydrogen-levels-continue-rise-reactor-2-quadrupled-weeksComment by Mark on the Enenews thread:
"Just in case it needs to be mentioned, hydrogen is an indication of ongoing nuclear fission, I believe. Off the top of my head, correct me if necessary, the nuclear process splits the water into its elements, hydrogen and oxygen. So this means reactor 2 or rather the mess of melted out of containment and somewhere in the ground blob of molten highly radioactive remains of fuel rods are now fissioning again and TEPCO can't control it...."
Steve from Virginia's comment:
"Hydrogen is an indicator of chain reactions as a great deal of energy is required to break down the water molecules by way of radiolysis. Other indicators are increase in temperatures (which was indicated until Tepco removed instrument database), an increase in Xenon isotopes (which Tepco does not monitor/release), steam or vapor escaping from the plant or the ground near the building (which does not appear on blurry Tepco videos or is on the other side of the buildings from the cameras) and increases in radiation in and around the building (check)."
Majia here: It is worth pointing out that there was a recent radiation spike in California and Arizona and Potrblog had higher readings again:
Also, Potrblog reports rain 23X Background, which is much higher than detected by them in a while
I don't know what the implications of another explosion are.
However, the lack of further explosions has made it possible for the Japanese government and Tepco to conspire with the other governments of the world to hide the severity of the disaster.
The consequences for the Japanese are unknown, but they are not going to be pleasant for the people who develop disease from being poisoned by radioactive air, water, and food.
Would another explosion make the situation worse or would it ultimately make it evident to the entire public in the northern hemisphere that Japan is being poisoned and that nuclear power is totally out of control?
Again, I don't know what the chances are for another explosion, and I don't know whether that would make the contamination worse; but, I do know that the cover-up is ongoing despite increasing evidence of extensive contamination and re-contamination (after "de-contamination) in Japan.