So what are the available facts as they stand right now? Take a comparison with Chernobyl.
In the Soviet Union, reactor workers died within weeks. In the final phase of that disaster, radiation hit levels of 6,000 millisieverts per hour. Fukushima Daiichi's peak has been 400 millisieverts per hour, and that's at the red hot center of the plant itself.
According to the World Nuclear Association, you need exposure to 1,000 millisieverts per hour before suffering radiation sickness.
Even for the heroic workers still in the plant, prolonged exposure, says Polanski, could make them sick, but it will not kill them.
"No, not at all. Four hundred millisieverts sounds scary, but it's not," he says.