The large fire door is the key component to ensure the effectiveness of fire zone in AP1000 nuclear reactor.According to the fire design requirements and design criteria,the global structure of the large fire door is ...The large fire door is the key component to ensure the effectiveness of fire zone in AP1000 nuclear reactor.According to the fire design requirements and design criteria,the global structure of the large fire door is designed.Based on the designed structure,the thermal mathematical model of the large fire door is established.Based on the solid heat transfer theory,the multi-layer heat transfer theory and integrated heat transfer theory,the differential equations of heat conduction,initial conditions,and boundary conditions are determined.Thermal analysis for the fire door leaf and the closure is carried out by using the method of numerical simulation.Results show that:considering the thermal load,the whole structure of the large fire door can meet the fire resistance limit of 3 hours and the design is reasonable and feasible.This study provides theory basis for the design of the large fire door.展开更多
压水堆核电厂的设计基准事故定义为主管道双端断裂,这一假设过于保守.管道的失效方式往往是先出现破口而后再泄漏,即所谓的先漏后破(Leak Before Break,简称LBB),而不是双端断裂.LBB准则是防止核电厂压力管道发生灾难性破裂事故的重要...压水堆核电厂的设计基准事故定义为主管道双端断裂,这一假设过于保守.管道的失效方式往往是先出现破口而后再泄漏,即所谓的先漏后破(Leak Before Break,简称LBB),而不是双端断裂.LBB准则是防止核电厂压力管道发生灾难性破裂事故的重要评定准则.本文介绍了LBB评定技术在国外的发展情况和意义,阐述了LBB在AP1000核电厂中的应用情况及LBB评价的理论基础.展开更多
AP1000是美国西屋公司研发的大型压水反应堆,采用先进的非能动安全系统。AP1000反应堆有两种堆芯燃料布置方案:D19和Adv。结合两种设计方案的优点提出了一种新的堆芯燃料布置方案。利用MCNP6(Monte Carlo N-particle 6)程序对D19堆芯和...AP1000是美国西屋公司研发的大型压水反应堆,采用先进的非能动安全系统。AP1000反应堆有两种堆芯燃料布置方案:D19和Adv。结合两种设计方案的优点提出了一种新的堆芯燃料布置方案。利用MCNP6(Monte Carlo N-particle 6)程序对D19堆芯和新方案堆芯的首循环进行建模,并主要计算了新堆芯的核设计参数随燃耗的变化。结果表明,新堆芯在首循环寿期内满足AP1000的主要核设计准则。通过大规模并行计算表明,带燃耗计算功能的蒙特卡罗程序MCNP6能够在堆芯设计工作中发挥很好的参考作用。展开更多
潜在通路分析是一种常用于提高电路设计可靠性的方法。给予功能延伸,将潜在通路分析(S C A)技术引入AP1000核电厂主回路系统的设计分析。通过建立和主回路工艺特性相适应的模型,并采用人工路径搜索技术,判明标准设计中存在潜通路,再通...潜在通路分析是一种常用于提高电路设计可靠性的方法。给予功能延伸,将潜在通路分析(S C A)技术引入AP1000核电厂主回路系统的设计分析。通过建立和主回路工艺特性相适应的模型,并采用人工路径搜索技术,判明标准设计中存在潜通路,再通过分析提出了工程上较为可行的方案,算例表明该方案可明显降低潜通路的影响。展开更多
基金the support of the National Natural Science Foundation of China (Grant No. 51672241)Jiangsu Science and Technology Plan Project of China (Grant No. BE2016134)+5 种基金the 14th batch High-level Talents Project for "Six Talents Peak" (Grant No. XCL-092)the Province Postdoctoral Foundation of Jiangsu (1501164B)the Technical Innovation Nurturing Foundation of Yangzhou University (2017CXJ024)China Postdoctoral Science Foundation (2016M600447)Yangzhou Innovative Capacity Building Plan Project (YZ2017275)Yangzhou University Science Foundation Project (x20180290)
文摘The large fire door is the key component to ensure the effectiveness of fire zone in AP1000 nuclear reactor.According to the fire design requirements and design criteria,the global structure of the large fire door is designed.Based on the designed structure,the thermal mathematical model of the large fire door is established.Based on the solid heat transfer theory,the multi-layer heat transfer theory and integrated heat transfer theory,the differential equations of heat conduction,initial conditions,and boundary conditions are determined.Thermal analysis for the fire door leaf and the closure is carried out by using the method of numerical simulation.Results show that:considering the thermal load,the whole structure of the large fire door can meet the fire resistance limit of 3 hours and the design is reasonable and feasible.This study provides theory basis for the design of the large fire door.
文摘压水堆核电厂的设计基准事故定义为主管道双端断裂,这一假设过于保守.管道的失效方式往往是先出现破口而后再泄漏,即所谓的先漏后破(Leak Before Break,简称LBB),而不是双端断裂.LBB准则是防止核电厂压力管道发生灾难性破裂事故的重要评定准则.本文介绍了LBB评定技术在国外的发展情况和意义,阐述了LBB在AP1000核电厂中的应用情况及LBB评价的理论基础.
文摘AP1000是美国西屋公司研发的大型压水反应堆,采用先进的非能动安全系统。AP1000反应堆有两种堆芯燃料布置方案:D19和Adv。结合两种设计方案的优点提出了一种新的堆芯燃料布置方案。利用MCNP6(Monte Carlo N-particle 6)程序对D19堆芯和新方案堆芯的首循环进行建模,并主要计算了新堆芯的核设计参数随燃耗的变化。结果表明,新堆芯在首循环寿期内满足AP1000的主要核设计准则。通过大规模并行计算表明,带燃耗计算功能的蒙特卡罗程序MCNP6能够在堆芯设计工作中发挥很好的参考作用。
文摘潜在通路分析是一种常用于提高电路设计可靠性的方法。给予功能延伸,将潜在通路分析(S C A)技术引入AP1000核电厂主回路系统的设计分析。通过建立和主回路工艺特性相适应的模型,并采用人工路径搜索技术,判明标准设计中存在潜通路,再通过分析提出了工程上较为可行的方案,算例表明该方案可明显降低潜通路的影响。
