There is a dispute about possible radioactive substances within the ship.

For more information, see our guide on managing radioactive substances.

The highest level of radioactive substances found in this survey.

A small amount of radioactive substance is injected into the patient.

Certain radioactive substances also glow in the dark through a similar process, but you do not see that much any more.

"We seem to be walking around a hotbed of radioactive substance!"

It was said that the trouble did not cause any leak of radioactive substances to the outside.

The illness was perhaps caused by exposure to radioactive substances.

I think it is good that radioactive substances have been included in the report.

Birds can land on its surface and take small amounts of radioactive substances with them.