Well, things at the reactors seem to have been far worse than we were told. Again, regrettably, I am operating on incomplete information that is out of date, and quite probably not only incomplete but also, if past trends are predictive, understated. Sooner or later I am going to get something very wrong in this story, which I worry about a lot, but so far I have been well ahead of the curve.
The conclusion of the data and educated guesses below is that if you live in Tokyo or closer, and can take a vacation to Nagoya, or somewhere further, please do so. If not, please be ready to shelter in place for a while by having food and water stored in your domicile.
The troubling news (admission?) has to do with a neutron beam detected last week over a three day period:
Neutron beam observed 13 times at crippled Fukushima nuke plant
Tokyo Electric Power Co. said Wednesday it has observed a neutron beam, a kind of radioactive ray, 13 times on the premises of the Fukushima Daiichi nuclear plant after it was crippled by the massive March 11 quake-tsunami disaster.
TEPCO, the operator of the nuclear plant, said the neutron beam measured about 1.5 kilometers southwest of the plant’s No. 1 and 2 reactors over three days from March 13 and is equivalent to 0.01 to 0.02 microsieverts per hour and that this is not a dangerous level.
The utility firm said it will measure uranium and plutonium, which could emit a neutron beam, as well.
In the 1999 criticality accident at a nuclear fuel processing plant run by JCO Co. in Tokaimura, Ibaraki Prefecture, uranium broke apart continually in nuclear fission, causing a massive amount of neutron beams.
In the latest case at the Fukushima Daiichi nuclear plant, such a criticality accident has yet to happen.
But the measured neutron beam may be evidence that uranium and plutonium leaked from the plant’s nuclear reactors and spent nuclear fuels have discharged a small amount of neutron beams through nuclear fission.
Our resident nuclear engineer, Dogs_in_a_Pile, says there are really only two realistic sources for a neutron beam, neither of them good.
(1) Fuel particles and/or fission products from the reactor core were scattered during a venting operation, and those were the source of the neutrons. This is possible, but it implies that far more than the
by sailaway 
