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所在平台: Udemy |
课程主页: https://www.udemy.com/course/nuclear-weapons-1/
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课程名称：核武器1 课程概述： 本课程探讨大规模杀伤性武器（WMD）的重要性及其影响，特别聚焦于核武器的特性和风险。核武器是一种利用核反应（裂变或裂变与聚变的结合）产生毁灭性力量的爆炸装置，它们能够释放大量能量，甚至只需极小的物质。课程将深入介绍电离辐射的概念，包括核辐射，这些辐射能够使原子或分子电离，并对生物、建筑或自然环境造成巨大危害。 我们还将讨论在核安全和辐射保护环境中，放射性污染的挑战和风险。何为放射性污染、其来源以及如何影响人类健康和环境都是课程的重要内容。例如，在核反应堆退役后，遗留的放射性物质可能会残留在场地上，影响周边环境。此外，课程将介绍放射剂量计的使用，作为监测和记录外部电离辐射剂量的工具。 急性辐射综合症（ARS），亦称辐射病，是因短期内暴露于高强度电离辐射而导致的一系列健康影响，其症状包括恶心、呕吐和食欲减退等，将在课程中详细讲解。此外，核废料的处理与存储也是课程的关键内容，涉及政府如何监管放射性废物以保护人类健康与环境。 通过本课程的学习，学员将能够深入理解核武器的构造、影响以及相关的安全和环境问题。
A weapon of mass destruction (WMD) is a biological, chemical, radiological, nuclear, or any other weapon that can kill or significantly harm many people or cause great damage to artificial structures (e.g., buildings), natural structures (e.g., mountains), or the biosphere. A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions (thermonuclear bomb), producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter. Ionizing radiation (US, ionising radiation in the UK), including nuclear radiation, consists of subatomic particles or electromagnetic waves that have sufficient energy to ionize atoms or molecules by detaching electrons from them. Some particles can travel up to 99% of the speed of light, and the electromagnetic waves are on the high-energy portion of the electromagnetic spectrum.Gamma rays, X-rays, and the higher energy ultraviolet part of the electromagnetic spectrum are ionizing radiation, whereas the lower energy ultraviolet, visible light, nearly all types of laser light, infrared, microwaves, and radio waves are non-ionizing radiation. In environments where nuclear safety and radiation protection are required, radioactive contamination is a concern. Radioactive substances can appear on surfaces, or within solids, liquids, or gases (including the human body), where their presence is unintended or undesirable, and processes can give rise to their presence in such places. Several examples of radioactive contamination include:residual radioactive material remaining at a site after the completion of decommissioning of a site where there was a nuclear reactor, such as a power plant, experimental reactor, isotope reactor, or a nuclear powered ship or submarine. A radiation dosimeter is a device that measures dose uptake of external ionizing radiation. It is worn by the person being monitored when used as a personal dosimeter, and is a record of the radiation dose received. Modern electronic personal dosimeters can give a continuous readout of cumulative dose and current dose rate, and can warn the wearer with an audible alarm when a specified dose rate or a cumulative dose is exceeded.Acute radiation syndrome (ARS), also known as radiation sickness or radiation poisoning, is a collection of health effects that are caused by being exposed to high amounts of ionizing radiation in a short period of time. Symptoms can start within an hour of exposure, and can last for several months. Early symptoms are usually nausea, vomiting and loss of appetite. Radioactive waste is a type of hazardous waste that contains radioactive material. Radioactive waste is a result of many activities, including nuclear medicine, nuclear research, nuclear power generation, nuclear decommissioning, rare-earth mining, and nuclear weapons reprocessing. The storage and disposal of radioactive waste is regulated by government agencies in order to protect human health and the environment.
