Assessment of Resonance Self-shielding Models during Burn-Up Calculations  

作　　者：Riham Refeat Basma Foad 

机构地区：[1]Egyptian Atomic Energy Authority(EAEA),Cairo 11787,Egypt

出　　处：《材料科学与工程（中英文A版）》2021年第3期96-105,共10页Journal of Materials Science and Engineering A

摘　　要：Various approaches and models are used in deterministic codes to treat the resonance self-shielding behavior of cross-sections.The accuracy of the models used has a significant effect on the precision of calculations;hence it is essential to select the best self-shielding method that yields accurate results within a reasonable computational time.In the present paper,the performance of the statistical subgroup method and the subgroup projection method associated with the DRAGON5 code is assessed during the burnup of a fuel pin.Two types of fuel are investigated:UO2,and PuO2-UO2.The accuracy of the methods is determined by calculating the variation of the infinite multiplication factor and the reaction rates during burnup,and then the results are compared to the stochastic MCNP6 code.It is indicated that the performance of both methods in treating the resonance self-shielding effect is satisfactory and that the subgroup projection method has a better performance during burnup calculations.

关 键 词：Resonance self-shielding effect statistical subgroup method subgroup projection method BURNUP 

分 类 号：TL2[核科学技术—核燃料循环与材料]