I am sorry, you are absolutely clueless on this.
The Chernobyl increase in radiation was purely because of the tanks moving through the territory and causing the top soil which covers the radioactive layer which has been covered with that top soil. This is 35 years after the disaster, so the elevated levels are caused purely by disrupting the work of the brave men who gave away their life to save millions.
Now for this, the reactors need to be cooled otherwise there's a real risk of a Chernobyl-style explosion. This power plant is also next to the Dnipro river as well as the Black sea. And one thing is for certain, radiation does respect boundaries.