Activity concentration values for exemption or clearance of materials which can be applied by default to any amount and to any type of solid material

anthropogenically enhanced concentrations of natural radionuclides

Natural radionuclides from the Th-232 series

Natural radionuclides from the U-238 series

However, the determination of radioiodine in environmental samples

Natural radionuclides may be conveniently subdivided into three types.

Some industrial activities can increase the release of natural radionuclides.

Our bodies can’t distinguish between natural and artificial radionuclides.

However, our body cannot differentiate between natural and artificial radiation.

The actinide or actinoid elements are a series of elements including atomic number 89 (actinium) through 103 (lawrencium).

These tailings may contain traces of all original minerals, including non-extracted natural radionuclides.

monitor employees’ external and internal exposure to natural radionuclides in the uranium and thorium decay chains,

For other practices involving naturally-occurring radionuclides, such values are, in general, not applicable;

For other practices involving naturally-occurring radionuclides, such values are, in general, not applicable.

The instrumental techniques used in the Environmental Radioactivity Laboratory to determine the different natural radionuclides are: