ANS Nuclear cafe says....nothing to see here, worry about your diet and exercise, not the radiation.
http://ansnuclearcafe.org/
The 800 lb elephant in the room is the internal emitters, radiation that makes its way into your body and then sends out little mercenary bomblets for years or decades, each one could cause a mutation or a start of a cancer. Many chances to kill you a thousands cuts at a time, or maybe a few big cuts.
Or radiation that causes a mutation and then your future kids pass on an oddball gene, and then their kids meet someone with that same oddball gene 50 years from now and have a serious birth defect.
This stuff is very serious. The Cesium gathers in apex predators similar to the way mercury does. One day perhaps the main Apex predator man, may eat the number 2 or three and get a consolidated dose of Cesium.
They should have 50,000 or even 200,000 people fighting this thing, not on the ground there, but in every support and supply service that you could imagine.