Temperature Field Calculation of Spherical Fuel Element Based on Online Coupling

Gu Chen; He Yanan; Deng Chaoqun; Wu Yingwei; Zhang Jing; Tian Wenxi; Su Guanghui; Qiu Suizheng

doi:10.13832/j.jnpe.2023.01.0079

Volume 44 Issue 1

Feb. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(1): 79-88

Gu Chen, He Yanan, Deng Chaoqun, Wu Yingwei, Zhang Jing, Tian Wenxi, Su Guanghui, Qiu Suizheng. Temperature Field Calculation of Spherical Fuel Element Based on Online Coupling[J]. Nuclear Power Engineering, 2023, 44(1): 79-88. doi: 10.13832/j.jnpe.2023.01.0079

Citation:

Gu Chen, He Yanan, Deng Chaoqun, Wu Yingwei, Zhang Jing, Tian Wenxi, Su Guanghui, Qiu Suizheng. Temperature Field Calculation of Spherical Fuel Element Based on Online Coupling[J]. Nuclear Power Engineering, 2023, 44(1): 79-88. doi: 10.13832/j.jnpe.2023.01.0079

Citation:

Gu Chen, He Yanan, Deng Chaoqun, Wu Yingwei, Zhang Jing, Tian Wenxi, Su Guanghui, Qiu Suizheng. Temperature Field Calculation of Spherical Fuel Element Based on Online Coupling[J]. Nuclear Power Engineering, 2023, 44(1): 79-88. doi: 10.13832/j.jnpe.2023.01.0079

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Temperature Field Calculation of Spherical Fuel Element Based on Online Coupling

doi: 10.13832/j.jnpe.2023.01.0079

School of Nuclear Science and Nuclear Technology, Xi’an Jiaotong University, Xi’an, 710049, China

Received Date: 2022-02-25
Rev Recd Date: 2022-10-29
Publish Date: 2023-02-15

Abstract

Abstract

Due to the complex structure of TRI-Structural Isotropic (TRISO) dispersion fuel elements and its material properties that change under irradiation, it is difficult to determine the equivalent thermal conductivity (ETC) of fuel element under different burnup. In this study, the TRISO particle performance analysis program is developed based on COMSOL software, and compared with the predicted value of BISON program. Then, based on the joint simulation of COMSOL and MATLAB, the calculation method of equivalent thermal conductivity of spherical fuel element is established, and the online coupling calculation between spherical fuel element and TRISO particle model is realized. On this basis, the radial equivalent thermal conductivity distribution and temperature field distribution of fuel element under different boundary temperature and burnup conditions are obtained. The calculation results show that when the fast neutron flux reaches 3×10²⁵ m^–2, the equivalent thermal conductivity of TRISO decreases by about 20%, and the equivalent thermal conductivity of fuel decreases by about 15 W/(m·K). In order to demonstrate the effectiveness of this method, the equivalent thermal conductivity of fuel is calculated by differential-effective medium theory model (D-EMT). The predicted value of spherical fuel center temperature is about 25 K lower than that of this method. The research method in this paper can more truly reflect the temperature field change of spherical fuel element in the reactor.
- Equivalent thermal conductivity,
- Spherical fuel element,
- TRISO particles,
- Coupling,
- COMSOL

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References(19)

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