AP1000核电厂二回路主管道断裂工况下的甩击行为研究

发布时间：2018-03-07 15:07

本文选题：AP1000核电厂　切入点：二回路主管道　出处：《华北电力大学(北京)》2014年硕士论文　论文类型：学位论文

【摘要】：本文以山东海阳AP1000核电站一期工程为依托工程开展研究。山东海阳核电厂常规岛主蒸汽管道和主给水管道从核岛进入常规岛。根据西屋及美国规范《ANSI/ANS.58.2-1988》的要求,为避免主蒸汽及主给水管道在双端断裂时产生的流体喷射及管道甩击对核岛辅助厂房造成不可接受的影响,在进行设计时,需要对主蒸汽管道和主给水管道破裂的危害进行分析并设置防护装置,以满足对核岛辅助厂房的安全性的要求。但是以往分析手段主要是基于规范要求的简化算法,所得结果偏保守,并且无法进行高能管道甩击的动态过程分析。为了保证常规岛高能管道破裂分析、甩击计算及约束件设计的顺利进行,本文进行常规岛高能管道双端断裂后的力学特性以及约束件设计的数值模拟分析。通过计算分析可知,RELAP5计算所得的喷射力要小于简化计算方法所得结果,这也印证了简化计算方法得到结果比较保守。无论在保守力还是非保守力作用下,管道自然甩击都会对周围的设备以及墙体造成严重的破坏,因此在未加约束件的管道附近,甩击轨迹所及之处不宜安置重要设备与管道。U-bolt约束件利用本身的塑性变形能有效限制管道甩击,保住周围的重要设备和墙体。U-bolt约束件在设计过程中需要综合考虑其根数与直径对其约束能力的影响。
[Abstract]:Based on the first phase project of Shandong Haiyang AP1000 Nuclear Power Station, the main steam pipeline and main feed water pipeline of Shandong Haiyang Nuclear Power Plant enter the conventional island from the nuclear island. According to the requirements of Westinghouse and American Code < ANSI/ANS.58.2-1988 >, In order to avoid the unacceptable effects of fluid injection and pipe jetting on the auxiliary plant of the nuclear island when the main steam and main feed water pipeline are broken at both ends, when the design is carried out, It is necessary to analyze the damage of the main steam pipeline and the main water supply pipeline and to set up protective devices to meet the safety requirements of the auxiliary powerhouse on the nuclear island. But in the past, the analysis means are mainly based on the simplified algorithm required by the specification. The results obtained are conservative and can not be used to analyze the dynamic process of high energy pipeline jammers. In order to ensure the failure analysis of high energy pipelines in the conventional island, the calculation of jammers and the design of restraints are carried out smoothly. In this paper, the mechanical properties of the conventional island high energy pipeline after the double end fracture and the numerical simulation analysis of the design of the constrains are carried out. The calculated jet force obtained by RELAP5 is smaller than that obtained by the simplified calculation method. This also proves that the simplified calculation method is more conservative. Under the action of conservative force and non-conservative force, the natural jetting of pipeline will cause serious damage to the surrounding equipment and wall, so it is near the unrestrained pipe. It is not appropriate to place important equipment and pipeline. U-bolt restraints where the track is within reach. The plastic deformation of itself can effectively limit the pipe flapping. The influence of the root number and diameter on the restraint ability should be considered in the design of the important equipment and wall. U-bolt restraints.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM623

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