Research on Ray Effect Method Based on Global Factor Correction for First Collision Source

Yang Chao; Li Zhipeng; Yu Tao; Chen Zhenping

doi:10.13832/j.jnpe.2023.03.0054

Volume 44 Issue 3

Jun. 2023

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Yang Chao, Li Zhipeng, Yu Tao, Chen Zhenping. Research on Ray Effect Method Based on Global Factor Correction for First Collision Source[J]. Nuclear Power Engineering, 2023, 44(3): 54-58. doi: 10.13832/j.jnpe.2023.03.0054

Citation:

Yang Chao, Li Zhipeng, Yu Tao, Chen Zhenping. Research on Ray Effect Method Based on Global Factor Correction for First Collision Source[J]. Nuclear Power Engineering, 2023, 44(3): 54-58. doi: 10.13832/j.jnpe.2023.03.0054

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Research on Ray Effect Method Based on Global Factor Correction for First Collision Source

doi: 10.13832/j.jnpe.2023.03.0054

1.
School of Nuclear Science and Technology, University of South China, Hengyang, Hunan, 421001, China
2.
Institute of Applied Physics and Computational Mathematics, Beijing, 100088, China

Received Date: 2022-06-30
Rev Recd Date: 2022-09-20
Publish Date: 2023-06-15

Abstract

Abstract

In the calculation of neutron transport problems with spatially localized source or largely void region, the discrete ordinate method (S_N) suffers from ray effects, which cause computational inaccuracies. The first collision source method is often used to alleviate the ray effect to improve the reliability of results. However, this method requires the calculation of the uncollided neutron flux. Generally, which is typically achieved through ray tracing technology based on the grid center method or the grid corner average method, destroying the conservation principle of the number of uncollided neutrons. In this paper, a global factor correction method is proposed to correct the uncollided neutron flux to meet the principle of neutron number conservation. Through the test of Kobayashi shielding calculation benchmark problem, the calculation results show that the maximum error is reduced from 6.15% to 3.71%, indicating that the method can effectively improve the accuracy of calculation results and provide data support for shielding optimization design.
- Global factor,
- Discrete ordinate method (S_N),
- First collision source,
- Ray effect

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References(13)

References

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