State radiation experts expect to find natural radioactivity and material produced by licensed radioactive material users such as hospitals. The helicopter will fly a grid pattern at an altitude ...

Workers in the U.S. nuclear industry are allowed an upper limit of 50 millisieverts per year. Doctors say radiation sickness sets in at 1,000 millisieverts and includes nausea and vomiting.

Norway said on Wednesday that elevated levels of radioactive caesium (Cs-137) it had detected near the Arctic border with Russia were likely due to a forest fire near Chornobyl in Ukraine, the ...

Promising Outlook “Nuclear physicists in Japan have been monitoring their local radiation levels. One group of physicists at a research lab about 120 miles from the reactors has been monitoring this ...