There are two lectures first, then one panel discussion today.
Before the lectures, there was a speech.
Lecture1:Basics of Radiation and Radiation Exposure By Mr.Tazaki started.
Suppose you're afraid.Someone say to you, "Don't afraid! It's safe." Other guy says, "Be afraid! It'a really dangerous." which is correct? Which should you believe? Important point is, "checking."
Here's a link to his site and the free book(in Japanese)
With 10Sv exposure, many people dies, with too many DNA rupture. Unable to repair DNA in that situation.