Hello, fellow /sci/entists.
So I'm currently studying nuclear physics, and today I came across the story of Hisashi Ouchi for the first time. For those unfamiliar:
Ouchi was exposed to lethal levels of radiation and kept alive by the government for almost three months against his will to see what would happen.
The morbid details of his death aside, I'm mostly interested in the cause of the accident itself. According to various other sources, he was pouring a bucket of aqueous uranyl nitrate into a tank containing uranium dioxide when the solution suddenly went critical. I've always been under the assumption that criticality can only be achieved with relatively large amounts of enriched uranium, but the uranium sustaining the reaction in this case was natural uranium. Since I haven't been able to find any information about this reaction, I figured you might be able to answer my questions:
1. Can high levels of gamma and neutron radiation like what killed Ouchi be produced by simply reacting aqueous uranyl nitrate with uranium dioxide?
2. Assuming it can, what's smallest amount of these two chemicals that can be combined to achieve criticality?
3. In the event that such a solution remained subcritical, would it still produce any measurable levels of gamma and neutron radiation?
4. Can such a reaction be safely reproduced in a lab setting?
Thank you for the help.
Don't forget the tank non-design also contributed to this with a water jacket acting a a reflector. They eventual quenched the reaction with the removal of the water jacket and the addition of boron....
>He was kept alive as long as possible because that is the customs/beliefs of Japanese society to preserve life no matter the cost.
You speak on behalf of Japanese society?
Do you know the suicide rate in Japan is twice that of most countries?
Regardless of their culture, what I see is a man who wanted to die and the government not letting him do so, for whatever reason, maybe they thought the society he was in expected him to "tough it out", caused him a lot of unwanted suffering.
1) Suffering man wants to die
2) Organization doesn't let him.
I find this as repulsive as if a cult found a man in the same state and kept him alive for religious reasons.
>against his will
Apologies, I don't think there is any source to back this up is there.
Your links just mentioned him not wanting to be experimented on, not many other details.
As far as I can see, he didn't want to be subjected to experimental treatment, there is no account of him being subjected to it against his will is there?
I'm pretty sure it's pronounced "oh-shee," but even so....
It saddens me that my german government forbid medical assisted suicide against the overwhelming will of the population last year.
And of course it was for retarded religious reasons...
He seems the victim of an explosion or burning, not radiation.
And also, wow! Misery impersonated.
anyways, thereś a famopus, errr.. object/experiment that killed a record number of people in the us , achieving critical mass repeatedly. Nedd to look that up.
Side question - I've been reading a lot about radioactive accidents lately, orphan sources etc - does anyone know who has received the largest dose of radiation ever?
This Ouchi guy at 17Sv is taking the cake so far...
>Apologies, I don't think there is any source to back this up is there.
>Thus he must have wanted
I believe the only words he ever muttered during the time was "mommy make it stop"
Tbh I would have kept him alive just as the Japanese did to study the effects of such acute radiation poisoning, but I'm certainly not going to sit here and pretend that's what he wanted