【摘要】 安全壳是确保核电厂安全的关键设施。必须在设计中考虑到安全壳在可能引发重大核事故意外荷载作用下的工作性能。地震是核电厂使用过程中有可能出现的自然灾害之一,并可能引发重大事故,所以必须对安全壳结构进行严格的抗震性能分析,保证预应力混凝土安全壳能承受SSE地震作用而不被损坏。本文通过有限元模型的计算与分析,得到先进核电厂CNP1000安全壳结构在SSE作用下的应力、变形、位移等地震反应,由此进行安全壳结构构件抗震分析计算。计算结果表明,CNP1000安全壳结构在SSE作用下,结构安全可靠,其设计能满足我国核电厂安全导则对抗震I类结构的规定。更多还原

【Abstract】 Containment is the enclosure structure of reactor building for a nuclear power plant.It prevents the leakage of radioactive materials out of the NPP in an accident,and is the key component for safety of the NPP.It must be designed to resist the load under severe accident.Earthquake is one of potential natural disaster during the plant service life.And earthquake may result in severe accident.Seismic analysis should be performed for the containment.Prestressed concrete containment should be designed to remain functional under SSE (Safe Shutdown Earthquake).In this work,finite element analysis was use to study the containment earthquake-resistance capacity,the displacement,stress and inner force of the structure under SSE.The results show that the containment structure is adequately safe,and the design can meet the category I requirement of nuclear power plant.更多还原