Radioactive substances within the meaning of the Atomic EnergyAbility to do work or diffuse heat. The unit of energy is th... Act are:
- nuclear fuels, i.e.
- plutoniumPlutonium - the 94th element in the classification of elemen... 239 and plutoniumPlutonium - the 94th element in the classification of elemen... 241,
- uraniumNatural radioactive element with the atomic number 92. The n... enriched with the isotopes 235 or 233,
- any substance containing one or several of the substances mentioned in a) and b),
- substances which can be used in a suitable plant to maintain a chain reactionSelf-perpetuating reaction. In a fission chain reaction, a f... which initiates its own repetition and which are determined in an ordinance having the force of lawLow active waste; usually with an activity concentration of ....
- other radioactive substances which – without being nuclear fuelIn accordance with the definition of the German Atomic Energ... -,
- spontaneously emit ionizing rays,
- contain one or several of the substances mentioned in a) or are contaminated with such substances.
The Radiological Protection Ordinance further distinguishes:
- enclosed radioactive substancesRadioactive substances continuously enclosed by a tight, fir...: radioactive substances which areenclosed by a tight, firm, inactive shell or permanently embedded in solid inactive substances so that the release of radioactive substances is prevented in the case of usual normal stress; a dimension must at least amount to 0.2 cm;
- open radioactive substancesRadioactive substances which are not enclosed, i.e. surround...: all radioactive substances except for enclosed radioactive substancesRadioactive substances continuously enclosed by a tight, fir...;
- short-lived radionuclidesThe Radiological Protection Ordinance defines radioactive su...: radioactive substances with a half-lifeThe period during which half of the nuclei decay in a quanti... of up to 100 days;
- long-lived radionuclidesThe Radiological Protection Ordinance defines radioactive su...: radioactive substances with a half-lifeThe period during which half of the nuclei decay in a quanti... of more than 100 days.