Issue |
EPJ Web Conf.
Volume 247, 2021
PHYSOR2020 – International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future
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Article Number | 03012 | |
Number of page(s) | 8 | |
Section | Deterministic Transport | |
DOI | https://doi.org/10.1051/epjconf/202124703012 | |
Published online | 22 February 2021 |
https://doi.org/10.1051/epjconf/202124703012
METHODS FOR CALCULATION OF SELF-SHIELDED CROSS SECTIONS OF FULLY CERAMIC MICRO-ENCAPSULATED FUEL DOUBLE HETEROGENEOUS SYSTEM
School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China
School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China
Published online: 22 February 2021
Fully ceramic micro-encapsulated (FCM) fuel is a kind of fuel that employs tri-structural isotropic (TRISO) particles to enhance safety. The FCM fuel assembly is a double heterogeneous system. The conventional self-shielding calculation methods cannot treat the DH effect. In this paper, three methods based on equivalent homogenization of the TRISO particle and the matrix are studied and compared: the hyper-fine energy group cross sections (XSs) homogenization based hyper-fine energy group method (HHM), the hyper-fine energy group XSs homogenization based subgroup method (HSM) and the subgroup XSs homogenization based subgroup method (SSM). These methods are implemented in a high-fidelity neutronics code NECP-X. Numerical results show that these methods are able to treat the double heterogeneity of the FCM fuel. The precision of the HHM and HSM is higher than that of the SSM.
Key words: FCM fuel / double heterogeneity / hyper-fine energy group method / subgroup method / NECP-X
© The Authors, published by EDP Sciences, 2021
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