低温堆供热控制研究  

Study on Heating Control of Low-temperature Reactor

作　　者：张乐 贾玉文[1] 段天英[1] 刘勇[1] 崔晓涵 ZHANG Le;JIA Yuwen;DUAN Tianying;LIU Yong;CUI Xiaohan(Department of Nuclear Engineering Design,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院核工程设计研究所,北京102413

出　　处：《原子能科学技术》2023年第1期165-174,共10页Atomic Energy Science and Technology

摘　　要：核能作为清洁、高效的能源,可以取代燃煤用于冬季供暖,从而实现供暖过程中“减污降碳”的目标。针对热网提出的供热需求指标,本文基于MATLAB/Simulink仿真平台,建立了池式低温堆全厂主系统模型,并提出了可用于反应堆功率调节的供热控制方案。文中主要针对功率定值调节过程和热网事故小扰动工况反应堆响应过程作了详细分析。仿真研究结果显示,该控制方案能够根据热网对负荷的需求,调整反应堆功率,调节过程中反应堆各温度参数都在安全限值以内,并能够将用户室内温度维持在一个相对稳定的范围内。同时,该控制方案具有一定的抗事故工况负荷小扰动能力。在热网管网断裂等事故造成的负荷阶跃小扰动时,能够维持反应堆功率不变,使各回路温度在安全允许的范围内缓慢改变并重新达到稳定,且用户室内温度稍微变化后即可重新稳定。因此,该供热控制方案具有一定的设计参考价值。As a clean and efficient energy,nuclear energy can replace coal for heating in winter,so as to achieve the goal of“reducing pollution and carbon”in the heating process.According to the heat supply demand index proposed by the heat supply network,based on MATLAB/Simulink simulation platform,the whole plant main system model of swimming pool-type low-temperature reactor was established,and the heat supply control scheme which can be used for reactor power regulation was put forward in this paper.The fixed value adjustment process of reactor power and the reactor response process under heat network accident conditions were analyzed in detail.The simulation results show that the control scheme can adjust the reactor power according to the fixed value demand of the heat supply network load.During the adjustment process,the main temperature parameters of the reactor are within the safety limit,and the temperature in the user room of the heat supply network can be maintained near 18℃.Due to the large heat capacity of the low-temperature reactor pool and there are three heat exchange circuits from the heat source to the heat network,resulting in a certain pure lag link,which makes the regulation time constant of the water supply temperature very large.At the same time,the control scheme has a certain ability to resist small load disturbance under accident conditions.In case of small load step disturbance of 2%PN caused by accidents such as fracture of heat supply network,the scheme can control the reactor power unchanged,and the temperature in the user’s room can only change within the range of 1℃and be stabilized again.In addition,the control scheme can automatically trigger the flow control link of the primary circuit under the accident condition of the heat supply network,adjust the flow of the primary circuit,so that the temperature entering the reactor water tank does not exceed 68℃,so as to ensure that the water temperature of the water tank does not exceed the concrete temperature limit.As the primary

关 键 词：核能供热 池式低温堆 变流量 功率控制 负荷扰动 

分 类 号：TL361[核科学技术—核技术及应用]