Not OP but German as well. Can confirm statement.

Sources are easy to find but are mostly in German, e.g.

https://www.welt.de/wissenschaft/umwelt/article139797061/Geh...

http://www.faz.net/aktuell/gesellschaft/tschernobyl-folgen-r...

http://www.umweltinstitut.org/themen/radioaktivitaet/tschern...