Study on Prevention of Airborne Radioactivity Diffusion of Underground Nuclear Power Plants
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摘要: 给出地下核电厂防止气载放射性核素扩散的总体原则,分析地下核电厂防止气载放射性核素扩散的工程措施,重点研究严重事故下的防护措施。提出一种严重事故下可实现安全壳及反应堆厂房洞室及时卸压的系统。该系统非能动响应,并根据严重事故的不同情况自动采取相应的应对措施,过滤排放安全壳及洞室内放射性气载物的同时为安全壳和洞室降压。通过这些工程措施可以更好地控制地下核电厂严重事故中产生的气载放射性核素,从设计上实现实际消除大量放射性核素释放的可能性。Abstract: The general principle for the prevention of the airborne radioactivity diffusion in underground nuclear power plants is put forward. The engineering measures to prevent the radioactivity diffusion in the underground nuclear power plant are studied with the emphasis on the engineering measures under severe accidents. The pressure relief system for containment and reactor building cavern under severe accidents which vents and filters the airborne radioactivity according to the different conditions in severe accidents was proposed. By these engineering measures, the airborne radioactivity in severe accidents in underground nuclear power plants is more effectively prevented and controlled, and it is possible to achieve the practical elimination of the accident sequences that may lead to radioactive release by design.
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