Application of Unstructured Mesh Variational Nodal Method in He-Xe Cooled Micro Reactor

Sun Qizheng; Liu Xiaojing; Zhang Tengfei

doi:10.13832/j.jnpe.2024.05.0026

Volume 45 Issue 5

Oct. 2024

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Sun Qizheng, Liu Xiaojing, Zhang Tengfei. Application of Unstructured Mesh Variational Nodal Method in He-Xe Cooled Micro Reactor[J]. Nuclear Power Engineering, 2024, 45(5): 26-31. doi: 10.13832/j.jnpe.2024.05.0026

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Sun Qizheng, Liu Xiaojing, Zhang Tengfei. Application of Unstructured Mesh Variational Nodal Method in He-Xe Cooled Micro Reactor[J]. Nuclear Power Engineering, 2024, 45(5): 26-31. doi: 10.13832/j.jnpe.2024.05.0026

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Application of Unstructured Mesh Variational Nodal Method in He-Xe Cooled Micro Reactor

doi: 10.13832/j.jnpe.2024.05.0026

School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

Received Date: 2023-10-30
Rev Recd Date: 2024-01-13
Publish Date: 2024-10-14

Abstract

Abstract

Advanced designs of micro reactors are distinguished by intricate geometries and pronounced neutron leakage. To enhance the precision of neutron property analysis in these complex geometrical designs, this study introduces an Unstructured Mesh Variational Nodal Method (UVNM-S_N). The UVNM-S_N method initiates from the functional formulation of the second-order even-parity neutron transport equation. Spatially, arbitrary triangular unstructured meshes and coordinate mapping techniques are employed. Besides, angular decoupling of the original equations is achieved through the application of the discrete-ordinate (S_N) method. Furthermore, the SIMONS design, a helium-xenon (He-Xe)-cooled micro reactor, is chosen as the analytical subject to verify the performance of the UVNM-S_N. Numerical results demonstrate that UVNM-S_N exhibits geometric adaptability and computational precision in heterogeneous problems with complex geometries. Consequently, it is concluded that UVNM-S_N can stand as an innovative strategy for numerical simulations in advanced micro-reactor designs.
- Variational nodal method (VNM),
- Unstructured mesh,
- He-Xe cooled micro reactor,
- Discrete ordinates method（S_N）

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References(19)

References

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