Richard Handl, a Swedish citizen arrested for trying to build nuclear reactor in his kitchen. He collected all the essential elements such as radium, uranium and conducting experiment in his appartment's kitchen.
This is completely against Sweden law for conducting such type of dangerous experiments without legal authority.
Richard enclosed all his experiments in richardsreactor.blogspot.com
He also mentioned that he wanted to create a small experiment of the possible meltdown and explains that it was very difficult for him to get elements like urnaium, radium to conduct the experiment.