Some rather dubious claims that the debris and surrounding area from the explosions at Novofedorivka are showing elevated radiation levels though it is still fairly low levels - about the same as the bits of Pripyat they allow tourists to wander around. Some speculating Russia held nuclear weapons at the site but I find it unlikely they wouldn't be stored in reinforced bunkers able to withstand the kind of strikes that appear to have happened - but this is Russia...