Chief Cabinet Secretary Edano said at the time "There is no immediate
effect on health." I actually thought this was going to be a big big
problem. Why was I concerned? Because the current Radiation Protection
Law is based on dealing with a small amount of radioactive materials that
emit very high radiation. In this case the total radioactive materials is
not much of an issue. What matters is how high the radiation is.
However in the case of the Fukushima I Nuclear Power Plant accident, 5
microsieverts within 100km radius (Tokai-Mura), .5 microsievert within
200km radius (Tokyo area) and the radiation extended far beyond, even to
teas in Ashigara and Shizuoka, as everybody now knows.
When we measure the radiation injury/sickness, we look at total amount of
radioactive materials. But there is no definitive report from TEPCO or
the Japanese Government as to exactly how much radioactive materials have
been released from Fukushima. So using our knowledge base at the
Radioisotope Center, we calculated.
Based on thermal output, it is 29.6 times the amount released by the
nuclear bomb dropped on Hiroshima. In uranium equivilant, it is 20
Hiroshima bombs. What is more frightening is that whereas the radiation
from a nuclear bomb will decrease to one-thousandth in one year, the
radiation from a nuclear power plant will only decrease to one-tenth.
In other words, we should recognize from the start that just like
Chernobyl, Fukushima I Nuke Plant has released radioactive materials
equivalent in the amount to tens of nuclear bombs, and the resulting
contamination is far worse than the contamination of a nuclear bomb.
From a systems biological viewpoint, if the total amount is small, you
only have to consider respective amount on each person. However when a
vast amount of radioactive materials are released it is in particles.
Dispersion of particles is non-linear, and it's one of the most difficult
calculations in the fluid dynamics.
The nuclear fuel is like sands buried in synthetic resin but once the
fuel melts down, a large amount of super-fine particles are released.
What happens then? The problem like the contaminated rice hay happens.
For example in Fujiwara-cho in Iwate Prefecture rice hay with 57,000
Bq/kg was found. Osaki in Miyagi Prefecture 17,000 Bq/kg. In Minami-Soma
city in Fukushima Prefecture 106,000 Bq/kg, and in Shirakawa city in
Fukushima 97,000 Bq/kg, and Iwate 64,000 Bq/kg.
The pattern of contamination does not follow concentric circles. It
depends on the weather. It also depends on where the particles landed -
on the material that absorbs water, for example.
We at the Radioisotope Center have been helping the people of Minami Soma
city in the decontamination effort. We've done 7 decontaminations so far.
When we went to Minami Soma for the first time there was only one Geiger
counter. On March 19 when the Ministry of Agriculture, Forestry and
Fisheries supposedly issued the notice [on cattle feed], food, water, and
gasoline were about to be depleted in the city.
The mayor of Minami Soma made a plea for help on the Internet, which was
widely viewed. In that type of situation no one would look at a piece of
paper from the Ministry, no one would know. Farmers didn't know that rice
hay was in danger. Still they bought the feed from abroad, paying
hundreds of thousands of yen, and started to feed the cattle with the
same groundwater that they drank.
So what should we do now? We have to guarantee that the thorough
radiation measurement is done in the contaminated area. As I said there
was only one Geiger counter in Minami Soma city when we went there in
May. In fact, there were 20 personal survey meters provided by the US
military, but no one at the city's Board of Education could understand
the English manual until we went there and told them how to use them.
That's how it is there.
As to the food inspection, there are more advanced meters than germanium
counters, such as semiconductor imaging detectors. Why doesn't the
Japanese government spend money in utilizing them? After 3 months the
government has done no such thing, and I am shaking with anger.
Second, I have been in charge of the antibody drugs at the Cabinet Office
since Mr Obuchi was the Prime Minister. We put radioisotopes to antibody
drugs to treat cancer. In other words my job is to inject radioisotopes
into human bodies, so my utmost concern is the internal radiation
exposure and that is what I have been studying intensely.
edit on 18-9-2011 by muzzleflash because: (no reason given)
So I would like to explain how the mechanism of internal radiation
exposure occurs. The biggest problem of internal radiation is cancer. How
does cancer happen? Because radiation cuts DNA strands. As you know, DNA
is in a double-helix, when it is in a double-helix it is extremely
stable. However when a cell divides it becomes single strands, doubles
and becomes 4 strands. This stage is the most vulnerable.
Therefore, the fetuses and small children, with cells that rapidly
divide, are the most suseptible to radiation danger. Even for adults,
there are cells that rapidly divide such as hair, blood cells and
intestinal epitheria, and they can be damaged by radiation.
Let me give you an example of what we know about internal radiation
exposure. One genetic mutation does not cause cancer. After the initial
hit by radiation, it needs a different trigger for a cell to mutate into
a cancer cell, which is called "driver mutation" or "passenger mutation".
For more information please refer to the attached document about the
cases in Chernobyl and cesium.
edit on 18-9-2011 by muzzleflash because: (no reason given)