Note 1: Harm of radiation: Radiation can be divided into electromagnetic radiation and nuclear radiation. Nuclear radiation hazards, such as gamma rays generated by cobalt -60, cesium-137 and iridium-192 sources; β-ray produced by kr-85 source; Neutron rays generated by 24 1Am-Be source, 24Na-Be source, 124Sb-Be source and electron accelerator with energy exceeding 10M; β and α rays produced by unsealed sources; X-rays generated by various industrial and medical X-ray equipment, etc. With the large-scale application of nuclear energy and nuclear energy technology in industry and nuclear radiation, agricultural production, medical and health care, scientific research and national defense, more and more people are exposed to radiation, and the harm of radiation cannot be ignored. Long-term radiation exposure will cause discomfort to human body, and in severe cases, it can cause damage to human organs and systems, leading to various diseases, such as leukemia, aplastic anemia, various tumors, fundus lesions, reproductive system diseases, premature aging and so on.
Remarks 2: Brief introduction of radiation: With the rapid development of modern science and technology, an invisible pollution source has attracted more and more attention from all walks of life, which is electromagnetic radiation called "invisible killer". As a good conductor of human body, electromagnetic wave will inevitably cause some harm. Generally speaking, radar systems, TV and broadcast transmission systems, radio frequency and microwave medical equipment, communication transmitting stations and EHV transmission lines, and most household appliances can generate electromagnetic radiation sources of various forms, different frequencies and different intensities.