一种新型稳压器的可行性研究

Feasibility Research on a New Type Pressurizer

为了紧凑布置核动力装置,以改变稳压器内部结构为出发点,文章提出一种新的波动管和电加热元件水槽布置形式的稳压器结构设计方案,探讨新型稳压器结构设计的可行性。新型稳压器结构为了灵活布置电加热元件新增了电加热元件水槽,水槽位于稳压器的上部空间,内置水平插入的电加热元件,波动管改为从稳压器上封头接入,以减少杂质进入主回路。通过STAR-CCM软件分析了换热元件水槽位置变化对稳压器水体积的影响规律,获得新型稳压器基本设计参数,并建立RELAP5稳压器设备模型,与传统稳压器模型进行对比分析,获得功率变化下新型稳压器结构的系统稳压特性。研究结果表明,新型稳压器水槽位置对压力响应的速度影响不大,在缓解下部空间布置紧张的同时满足瞬态稳压需求。

In order to compact layout the nuclear power plant and to change the pressurizer internal structure, a new design scheme with the arrangement of surge line and the electric heater tank of the pressurizer was proposed, and the feasibility of the new pressurizer structure design is discussed. To flexibly arrange the electric heater, the new pressurizer adds an electric heater tank which is located in the upper space of the pressurizer, and electric heater device is inserted horizontally. Besides, surge line is changed to be connected from the upper head of the pressurizer to reduce impurities entering the main loop. STAR-CCM was used to analyze the influence of the location of heater tank, and the basic design parameters of the new structure were obtained, then established the new pressurizer RELAP5 model, finally compared and analyzed with the traditional model to obtain the stabilizing characteristic under power change cases. The results show that the position of the water tank has little influence on the speed of pressure response, which can relieve the tension of the lower space arrangement and meet the steady pressure demand.