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

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

doi:10.1007/s41365-021-00935-6

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

NUCLEAR ENERGY SCIENCE AND ENGINEERING | Updated：2021-09-30

- Experimental study on the penetration characteristics of leaking molten salt in the thermal insulation layer of aluminum silicate fiber
- Nuclear Science and Techniques Vol. 32, Issue 9, Article number: 92(2021)
- Affiliations：
  
  1.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  2.CAS Innovative Academies in TMSR Energy System, Chinese Academy of Sciences, Shanghai 201800, China
  3.University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  Jian Tian tianjian@sinap.ac.cn
- Funds：
- DOI：10.1007/s41365-021-00935-6
  CLC：
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Yun Wang, Jian Tian, Shan-Wu Wang, et al. Experimental study on the penetration characteristics of leaking molten salt in the thermal insulation layer of aluminum silicate fiber. [J]. Nuclear Science and Techniques 32(9):92(2021)
DOI：

Yun Wang, Jian Tian, Shan-Wu Wang, et al. Experimental study on the penetration characteristics of leaking molten salt in the thermal insulation layer of aluminum silicate fiber. [J]. Nuclear Science and Techniques 32(9):92(2021) DOI： 10.1007/s41365-021-00935-6.

摘要

Abstract

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 penetration 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.

关键词

Keywords

Molten salt reactorMolten salt leakagePenetrationInsulation layer

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