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核能技术发展
Ionizing radiation : It can cause damage to matter, particularly living tissue. At high levels it is therefore dangerous, so it is necessary to control our exposure. Ionizing radiation, such as occurs from uranium ores and nuclear wastes, is part of our human environment, and always has been so. At high levels it is hazardous, but at low levels such as we all experience naturally, it is harmless. Considerable effort is devoted to ensure that those working with nuclear power are not exposed to harmful levels of radiation from it. Standards for the general public are set about 20 times (Sievert) lower still, well below 核能技術發展 the levels normally experienced by any of us from natural sources. 1 Sv = 1 joule/kil
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