Improvement of Accuracy of Resonance Self-Shielding Calculation Based on Subgroup Method

HUANG Shi-en; WANG Kan; YAO Dong

Mar. 2025

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HUANG Shi-en, WANG Kan, YAO Dong. Improvement of Accuracy of Resonance Self-Shielding Calculation Based on Subgroup Method[J]. Nuclear Power Engineering, 2011, 32(6): 7-12.

Citation:

HUANG Shi-en, WANG Kan, YAO Dong. Improvement of Accuracy of Resonance Self-Shielding Calculation Based on Subgroup Method[J]. Nuclear Power Engineering, 2011, 32(6): 7-12.

HUANG Shi-en, WANG Kan, YAO Dong. Improvement of Accuracy of Resonance Self-Shielding Calculation Based on Subgroup Method[J]. Nuclear Power Engineering, 2011, 32(6): 7-12.

Citation:

HUANG Shi-en, WANG Kan, YAO Dong. Improvement of Accuracy of Resonance Self-Shielding Calculation Based on Subgroup Method[J]. Nuclear Power Engineering, 2011, 32(6): 7-12.

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Improvement of Accuracy of Resonance Self-Shielding Calculation Based on Subgroup Method

1. Department of Engineering Physics, Tsinghua University, Beijing, 100084, China;
2. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2010-08-10
Rev Recd Date: 2011-05-10

Available Online: 2025-03-08

Abstract

Abstract

Based on the neutron self-shielding calculation code SGMOC,which is the combination of subgroup method and characteristics method that developed by ourselves,we studied the two techniques to improve the SGMOC calculation accuracy.The numerical results prove that both techniques have the capability to improve the resonance self-shielding calculation accuracy.The resonance interference effect treatment which uses a new method to obtain the conditional probabilities,has a correction effect about 20~230 pcm.When the impact of the resonance scattering is considered,the correction effect is about 100 pcm.When utilizing the above two techniques simultaneously,the correction effect is about 30~270 pcm.
- Resonance self-shielding,
- SGMOC,
- Resonance interference effect,
- Conditional probability,
- Resonance scattering