radioactivity

The site was found to be contaminated by radioactivity.

a damaged reactor leaking radioactivity into the atmosphere.

The level of radioactivity in the soil was found to be above recommended limits.

The soil contains 30 times the acceptable level of radioactivity.

The dismantling of a nuclear reprocessing plant caused a leak of radioactivity yesterday.

They argued that only a negligible rise in atmosphere radioactivity resulted from the test.

Disposal of wastes with radioactivity and other radioactive substances on the sea is forbidden. The exemptible radioactive content in the wastes shall be determined by the State Council.