.. and by anyone else that cares to. I trust the nuclear industry not to lie about facts that can be checked by anyone with a piece of kit that costs 150 euro off amazon. Given nuclear paranoia, I am quite sure a heck of a lot of people in the vicinity of said plants made that investment and we would have fracking well heard about it if they were covering up leaks. Not to mention that those very detection systems are how we promptly learned about chernobyl! They didnt wait and hem and haw about reporting that spike, it got published instantly.

As to rural dumping, I live 30 klicks from a major remediation project. - a plantation that was established in 1860 to limit sand dune migration, and used to dump waste from paint production in  1920s. Utterly poisonous to this day, and picked as a dump site because it was not near people, and that was the height of enviormentally responsible thought back then. Germany industrialized earlier, is a world center of chemical industry, and fought two world wars (Which was not good for record keeping! or responsible industry during).
The first instinct when you see a spike in cancers anywhere in germany really should not be to blame the nearst reactor. It should be to test the soil and water. There is probably something there, and that means it might well be fixable.