He writes, "This fear-mongering comes down yet again to the Linear No-Threshold dose hypothesis, or LNT. As has been discussed before, LNT supposes that all radiation is deadly and that there is no dose below which harmful effects will not occur (BEIR VII) ."
Nowhere does LNT suppose that all radiation is DEADLY! Only that it causes DNA damage, the damage can accumulate and cause cancer. The risk is low, and depends on the dose. There are no identified mechanisms for a threshold, and Conca offers none.
The study he is opining about sure has touched a pro-nuclear nerve!