Research and Verification of High-Fidelity Physics Calculation Method for Hexagonal Reactor

Chen Junji; Liu Zhouyu; Cao Lu; Cao Liangzhi

doi:10.13832/j.jnpe.2022.01.0007

Volume 43 Issue 1

Feb. 2022

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Chen Junji, Liu Zhouyu, Cao Lu, Cao Liangzhi. Research and Verification of High-Fidelity Physics Calculation Method for Hexagonal Reactor[J]. Nuclear Power Engineering, 2022, 43(1): 7-14. doi: 10.13832/j.jnpe.2022.01.0007

Citation:

Chen Junji, Liu Zhouyu, Cao Lu, Cao Liangzhi. Research and Verification of High-Fidelity Physics Calculation Method for Hexagonal Reactor[J]. Nuclear Power Engineering, 2022, 43(1): 7-14. doi: 10.13832/j.jnpe.2022.01.0007

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Research and Verification of High-Fidelity Physics Calculation Method for Hexagonal Reactor

doi: 10.13832/j.jnpe.2022.01.0007

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

Received Date: 2020-12-17
Rev Recd Date: 2021-01-11
Publish Date: 2022-02-01

Abstract

Abstract

Russian commercial pressurized water reactor VVER and most experimental reactors adopt hexagonal compact lattice arrangement. To realize the high-fidelity numerical simulation analysis of the VVER and the hexagonal experimental reactor, in this paper, the high-fidelity calculation method and program development of hexagonal core are carried out based on NECP-X. First, the global-local coupled resonance self-shielding calculation method is extended to the hexagonal core to realize the high-precision resonance calculation of hexagonal core fuel rods; Second, based on 2D/1D coupled transport calculation method, the high-fidelity calculation method of hexagonal core is studied; Finally, in order to improve the calculation efficiency of the full-core calculation, the coarse-mesh finite-difference (CMFD) acceleration method based on the loosely coupled unstructured grid of domain decomposition is studied, which can realize pin-by-pin coarse-mesh finite-difference acceleration based on rectangular, hexagonal and other polygonal cells. In order to verify the accuracy and efficiency of the hexagonal core high-fidelity calculation method, the hexagonal C5G7 benchmark problem is calculated, and the calculation accuracy of the hexagonal transport calculation method and the acceleration effect of the CMFD method are analyzed; NECP-X is applied to the two-dimensional full core calculation of a pulsed reactor in Xi’an. The comparison with the results of Monte Carlo program shows that the eigenvalues and power distribution calculated by NECP-X have high accuracy. Therefore, the high-fidelity calculation method of hexagonal core established in this paper can be applied to the analysis and calculation of hexagonal core.
- NECP-X,
- Hexagonal core,
- Method of characteristics (MOC),
- CMFD acceleration,
- 2D/1D calculation

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References(13)

References

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