When they say “bathed in radioactive cloud” they actually mean “wind carried trace amounts of radioactive materials”. Anytime anything “nuclear” is involved, the reporting gets very poetic.
"Bathed in a radioactive cloud" actually holds more for Chinese coal pollution than anything from a nuclear plant with the possible exception of Chernobyl.
> ...the levels of cesium-137 are barely detectable...
You'll get a lot more exposure from a single plane flight!