目的 核电厂中高能管道断裂后的甩击能量较高,造成的危害较大,严重影响了核安全。当管道端部断裂附近布置空间受限、无法布置防护措施时,存在二次危害风险,需要分析管道甩击过程,研究相关防护措施。方法 以主蒸汽管道为例,确定假想断裂破口,采用有限元动力分析方法,对管道甩击的路径、作用点、载荷和动能等进行研究。结果 当给定的断裂破口附近不便安装防甩件时,论证了管道甩击不会对安全相关结构、设备和部件造成危害,可以在墙体上设置防甩件。结论 在确保核电站安全的前提下,为减轻墙体可能受到的冲击力、预埋板布置和防甩件选择提供了指导,为提高经济性和减少时间成本提供了支持,并可应用于类似工程。
Abstract
The high-energy pipeline in nuclear power plants has a high impacting energy after fracture, causing great harm and seriously affecting nuclear safety. When the space near the pipeline end fracture is limited and protective measures cannot be arranged, there is a risk of secondary hazards, and it is necessary to conduct analysis of the pipeline whipping process and research on setting protective measures. With the main steam pipeline as an example, the hypothetical fracture was determined, and the finite element dynamic analysis method was used to study the path, point of action, load, and kinetic energy of the pipeline. When it was inconvenient to install anti-whip restraint devices for a given fracture position, it was demonstrated that pipeline whip would not cause harmful effects on safety-related structures, equipment and components, and anti-whip restraint devices could be installed on the wall. Under the premise of ensuring the safety of nuclear power plants, the work provides guidance for the possible impact on the wall, the arrangement of embedded plates and the selection of anti-whip restraint devices, offers support for improving economy and reducing time costs, and can be applied to similar projects.
关键词
高能管道 /
管道断裂 /
甩击 /
有限元动力分析
Key words
high-energy pipeline /
pipeline fracture /
whip /
finite element dynamic analysis
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