NDLI: The Compatibility of Nuclear Graphite With Molten Salt in the Molten Salt Reactor

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	He, Zhoutong Tang, Hui Zhang, Can Gao, Yantao Xia, Huihao Zhou, Xingtai
Copyright Year	2018
Abstract	In thermal Molten Salt Reactors, the nuclear graphite core is in direct contact with the molten salt coolant. Due to the porous nature of nuclear graphite, the molten salt may infiltrate the nuclear graphite, which may affect the mechanical strength and irradiation behavior of the nuclear graphite. In order to evaluate the infiltration behavior of molten salt in nuclear graphite, both FLiNaK and FLiBe salts were used to infiltrate two typical nuclear graphite grades: IG110 and NBG18. The pressure dependence of the infiltration weight gain ratio was measured. The influence of molten salt infiltration on the thermal properties of these two graphite grades, such as their thermal expansion behavior and thermal conductivity, was also measured. The mechanical strength of the FLiNaK-infiltrated graphite was measured at room temperature and elevated temperature, and showed that the mechanical strength of the nuclear graphite was enhanced at room temperature and weakened at elevated temperature by molten salt infiltration. Finally, the thermal expansion coefficient and the fracture surface analysis measured after FLiNaK infiltration indicated that the stress induced by molten salt infiltration could be one of the reasons for the graphite property changes.
Sponsorship	Nuclear Engineering Division
File Format	PDF
ISBN	9780791851449
DOI	10.1115/ICONE26-82065
Volume Number	Volume 2: Plant Systems, Structures, Components, and Materials; Risk Assessments and Management
Conference Proceedings	2018 26th International Conference on Nuclear Engineering
Language	English
Publisher Date	2018-07-22
Publisher Place	London, England
Access Restriction	Subscribed
Subject Keyword	Temperature Irradiation (radiation exposure) Molten salt reactors Fracture (materials) Pressure Stress Strength (materials) Thermal properties Thermal expansion Fracture (process) Weight (mass) Graphite Coolants Thermal conductivity
Content Type	Text
Resource Type	Article

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