[Vanayad]

Considering it doesn't emit that much radiation, and the one it does is shielded by lead (afaik) it's ok. I've been reading about the Ecat for quite some time...at first I had my doubts...but after being peer reviewed, several tests and running in self-sustain for around 6 months... it is safe to assume it is going to work.

[anovikov]

You can't easily block neutrons with lead. It takes some material with high content of light atoms such as hydrogen or helium. For example, polyethylene works well. And it has to be thick. Not box-sized, not even room-sized.