Well, “By the end of the century” is almost 80 years away, that is significantly longer than any normal nuclear power plant lasts.

Also it is very difficult to know which exact price someone pays for uranium because they normal dont buy on the spot market, but via long lasting contracts.

So from my point of view we don’t have sufficient information for a proper estimation of the situation.

Use anti diarrhea medication, for example Loperamide, it’s available in every normal pharmacy (found it in France and Germany, no idea where you are). It will basically numb all your muscles in your gut and it will become impossible to poop.

For three days that should be fine, but you should reduce your food volume a bit.

This is unhealthy and stupid!!! But it works and is not crazy dangerous for your body.

P.S.:I guess you should just overcome your social fears and poop like a normal person.