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Research on steady-state behavior of natural circulation with internally heated fluids of liquid-fueled molten salt reactor.

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Titel: Research on steady-state behavior of natural circulation with internally heated fluids of liquid-fueled molten salt reactor.
Autoren: Cao, Ying1,2 (AUTHOR) caoying@shanghaitech.edu.cn, Wan, Weishi1,2 (AUTHOR), Zhou, Chong1,2 (AUTHOR) zhouchong@sinap.ac.cn
Quelle: Annals of Nuclear Energy. Jun2025, Vol. 216, pN.PAG-N.PAG. 1p.
Schlagwörter: *SOLID fuel reactors, *MOLTEN salt reactors, *DIMENSIONLESS numbers, *WORKING fluids, *HEAT sinks
Abstract: • A steady-state analytical solution for the natural circulation of fuel-salt was established. • Specific dimensionless numbers were derived to indicate the characteristics of natural circulation of fuel salt. • A self-developed Python code was used to calculated the steady-state natural circulation calculation of fuel salt. • The influence of different distribution types of internal heat sources was evaluated. • An extended RELAP5/ SCDAPSIM/MOD4.0 code for LFMSR was used to verify the Python code and results show good agreement. Liquid-fueled molten salt reactors (LFMSR) utilize internally heated fuel-salt compounds as the working fluid for the first time and the heat source and heat sink conditions are crucial for the natural circulation phenomena. This paper explored the steady-state behaviors of natural circulation of LFMSR and analyzed the impact of internal heat. By incorporating a heat source term into the liquid phase, the natural circulation governing differential equations were modified and solved using a self-developed Python code. Then, the homogeneously volumetric heat model of LFMSR was compared with the core central heat model of a traditional solid fuel reactor, the LFMSR exhibited a smaller steady-state natural circulation flow reducing the natural circulation thermal effect. Subsequently, an extended RELAP5/SCDAPSIM/MOD4.0 code for LFMSR was applied to verify the self-developed code, and their quantitative steady-state parameters showed a good match, which can be used for more complex system analyses in future works. [ABSTRACT FROM AUTHOR]
Datenbank: Academic Search Index
Beschreibung
Abstract:• A steady-state analytical solution for the natural circulation of fuel-salt was established. • Specific dimensionless numbers were derived to indicate the characteristics of natural circulation of fuel salt. • A self-developed Python code was used to calculated the steady-state natural circulation calculation of fuel salt. • The influence of different distribution types of internal heat sources was evaluated. • An extended RELAP5/ SCDAPSIM/MOD4.0 code for LFMSR was used to verify the Python code and results show good agreement. Liquid-fueled molten salt reactors (LFMSR) utilize internally heated fuel-salt compounds as the working fluid for the first time and the heat source and heat sink conditions are crucial for the natural circulation phenomena. This paper explored the steady-state behaviors of natural circulation of LFMSR and analyzed the impact of internal heat. By incorporating a heat source term into the liquid phase, the natural circulation governing differential equations were modified and solved using a self-developed Python code. Then, the homogeneously volumetric heat model of LFMSR was compared with the core central heat model of a traditional solid fuel reactor, the LFMSR exhibited a smaller steady-state natural circulation flow reducing the natural circulation thermal effect. Subsequently, an extended RELAP5/SCDAPSIM/MOD4.0 code for LFMSR was applied to verify the self-developed code, and their quantitative steady-state parameters showed a good match, which can be used for more complex system analyses in future works. [ABSTRACT FROM AUTHOR]
ISSN:03064549
DOI:10.1016/j.anucene.2025.111320