磷酸三钠溶解速率研究  

Study on the Dissolution Rate of Trisodium Phosphate

作　　者：赵干 路长冬 周文涛 纪文英 张新煜 崔旭阳 王德忠[1] ZHAO Gan;LU Changdong;ZHOU Wentao;JI Wenying;ZHANG Xinyu;CUI Xuyang;WANG Dezhong(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;China Nuclear Power Technology Research Institute,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]中广核研究院有限公司,上海200240

出　　处：《核科学与工程》2024年第1期154-160,共7页Nuclear Science and Engineering

基　　金：国家自然基金青年基金(11805121)。

摘　　要：磷酸三钠(TSP)是“华龙一号”核电厂(HPR1000)安全注入系统(RIS)中重要的pH缓冲剂,它能够通过降低水环境中氢离子的浓度,使得安全壳中气态碘的释放份额显著下降,对避免放射性核素泄漏,确保核电厂运行人员和周围环境的安全具有重要意义。本研究为了探究磷酸三钠在水溶液中随温度、流量、有效接触面积等参数变化的溶解特性,搭建了高温密闭实验回路,模拟了TSP在安全壳内的多种溶解过程,并利用最小二乘法对实验数据进行回归分析,研究结果可以为“华龙一号”的设计计算和安全分析提供重要参考。Trisodium phosphate(TSP)is an important pH buffer in the reactor safety injection system(RIS)of the HPR1000 NPP.It can significantly reduces the share of gaseous iodine released from containment by reducing the concentration of hydrogen ions in the water environment,which is of great significance to avoid radionuclide leaks and to ensure the safety of nuclear power plant operators and the surrounding environment.This study aims to explore the dissolution characteristics of trisodium phosphate along with the change of parameters such as temperature,flow and effective contact area.Therefore,a high-temperature airtight circuit was built to simulate the variety of dissolving process of TSP in the containment vessel,and the least square method was used to analyze the experimental data.The study results can provide important reference for design calculation and safety analysis of HPR1000.

关 键 词：磷酸三钠 “华龙一号” 溶解特性 

分 类 号：TL48[核科学技术—核技术及应用]