Predicting spatially dependent reaction rate for problem with nonuniform temperature distribution by subgroup method

He, Qingming; Cao, Liangzhi; Wu, Hongchun; Forget, Benoit; Smith, Kord

doi:10.1016/j.anucene.2017.08.054

Cited by 10 publications

(1 citation statement)

References 28 publications

(32 reference statements)

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“…The resonance interference factor table is used to consider the interference effect (Choi et al, 2017). As for the subgroup method (Chiba and Unesaki, 2006;He et al, 2018), Tone's method (Tone, 1975;Lee and Yang, 2012;Mao, 2017;Zheng et al, 2018) and Embedded Self-Shielding Method (ESSM; Hong and Kim, 2011;Williams and Kim, 2012), the neutron slowing-down equation is solved directly with multigroup cross sections instead of being simplified in the equivalence theory, which means these method can be used in general geometries and the computation time is longer and the result is more accurate than the equivalence theory. However, in order to obtain highly accurate cross sections, the neutron slowing-down equation is solved with hundreds of energy groups.…”

Section: Introductionmentioning

confidence: 99%

Pin-resolved ultra-fine-group with correction method and its application to plate-type fuel reactor analysis

Rao

Peng

et al. 2023

Front. Energy Res.

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In order to perform the resonance calculation efficiently and accurately, several pin-resolved ultra-fine-group methods combining the ultra-fine-group method and Dancoff factor have been developed recently. The ultra-fine-group method is used to consider the self-shielding effect accurately in the 1-D fuel model, and the Dancoff factor is used to consider the shadowing effect in a lattice system. The pin-resolved ultra-fine-group with correction method, combining the ultra-fine-group method and Dancoff factor, is implemented in a transport code using the method of characteristic. In order to expand the application range, the pin-resolved method is extended for the plate-type fuel. Numerical results show good accuracy for the plate-type fuel reactor analysis.

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