The reason you can't find anything dehammer is that the studies are of radiation levels ... not cancer. You have jumped thousands of years ahead of reality.

What we know is the radiation levels.
And we know the changes are inconsequential.

You will not find studies on this until there is something to study any more than you will find studies on the incidence of lung disease caused by the eruption of Mt. Rainier (until it does).

But the science related to the issue is published and widely available.

DA Morgan