One night in July 2013, Xavier Nast, a French antinuclear activist, who many years before used to work at COGEMA, presently named AREVA, took the time to explain me the diffrence between some of the radioactive elements, in terms of their dangerosity.
As Xavier Nast told me, nothing is worth practical exercises to understand what is not always obvious at the first explanation.
Since the beginning of the Fukushima accident, everyone understands the situation as he/she perceives it, and everyone is right it is very serious indeed, but still we haven’t seen almost anything yet. And what we may risk to see and understand?
When sharing the “galette des rois”in France, some king cakes in the old days were stuffed with a a small gold coin (a gold Napoleon). If a greedy one swallowed it inadvertently, he will have to wait one to two days to recover it but his health will not be affected. https://en.wikipedia.org/wiki/King_cake
Imagine the coins gold plated and filled with actinides (highly toxic alpharadio transmitters) such as they all weigh 6 grams, have a diameter of 21 mm and the same visual appearance:
A) An Uranium 238 filled gold plated coin
B) A Plutonium 239 filled gold plated coin
C) A Plutonium 238 filled gold plated coin
D) A Polonium 210 filled gold plated coin
We will not see any difference in appearance and weight.
However the threshold for the lethal dose of an inhaled monolithic dust is:
0.835gram for A (Uranium 238)
0.000 000 4 gram for B (Plutonium 239)
0.000 000 001 6 gram for C (Plutonium 238)
0.000 000 000 007 gram for D (Polonium 210)
This means that the lethal dose of these coins could destroy:
6 lives for A (Uranium 238, there is a lot)
13,475,000 lives for B, more than Paris Metropolis population (Plutonium 239,there is a lot)
3,700,000,000lives for C, more than half of mankind (Plutonium 238 is rare)
850 billion lives for D, 120 times the world population. (Polonium 210 is very rare)
Yet these coins A, B, C and D have not caused you any damage after being swallowed, not even long after.Because they were all covered with a tenth mm of gold , which prevented the huge flow of alpha particles to destroy even just a little of your digestive tract.
Conclusion:alpha emitters radionuclides must remain CONFINED.
We therefore better have no nuclear plant to explode, especially one of those nuclear plants using MOX, as MOX fuel consists of 7% plutonium 239 mixed with depleted uranium, such as the ones we have many in France.
Knowing this, are you still willing for them to continue using their deadly nuclear technology? Do you still believe that civil nuclear is safe?