Experimental study on the penetration characteristics of leaking molten salt in the thermal insulation layer of aluminum silicate fiber

作     者：Yun Wang Jian Tian Shan-Wu Wang Chong Zhou Na-Xiu Wang Yun Wang;Jian Tian;Shan-Wu Wang;Chong Zhou;Na-Xiu Wang

作者机构：Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2021年第32卷第9期

页      面：27-39页

核心收录：

学科分类：082703[工学-核技术及应用] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the“Strategic Priority Research Program”of the Chinese Academy of Sciences(No.XDA0201002) the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2018301). 

主　　题：Molten salt reactor Molten salt leakage Penetration Insulation layer 

摘      要：The molten salt leakage accident is an important issue in the nuclear safety analysis of molten salt reactors.While the molten salt leaks from the pipeline or storage tank,it will contact the insulation layer outside;hence,the processes of penetration and spreading play an important role in the development of leakage accidents.In this study,the penetration and diffusion of leaking molten salt(LMS)in an aluminum silicate fiber(ASF)thermal insulation layer were studied experimentally.A molten salt tank with an adjustable outlet was designed to simulate the leakage of molten salt,and the subsequent behavior in the thermal insulation layer was evaluated by measuring the penetra-tion time and penetration mass of the LMS.The results show that when the molten salt discharges from the outlet and reaches the thermal insulation layer,the LMS will penetrate and seep out from the ASF,and a higher flow rate of LMS requires less penetration time and leaked mass of LMS.As the temperature of the LMS and thickness of the ASF increased,the penetration time became longer and the leaked mass became greater at a lower LMS flow rate;when the LMS flow rate increased,the penetration time and leaked mass decreased rapidly and tended to flatten.