Radioactive Waste 12
Radioactive Waste 12 : Radioactivity arises from some elements called isotopes. Not all isotopes emit ionising radiation. Radioactive waste is waste that can be the isotope or material contaminated with radioactivity that may be alpha, beta or gamma radiation above the natural or background level. It is usually characterised as low level emitter (LL), medium emitter (ME) or high level emitter (HE)