The RAPID Fission Matrix Approach to Reactor Core Criticality Calculations

Walters, William; Roskoff, Nathan; Haghighat, Alireza

doi:10.1080/00295639.2018.1497395

Cited by 23 publications

(1 citation statement)

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“…In order to obtain the system fission matrix efficiently, a fission matrix combination theory has been developed (Walters et al, 2018;Terlizzi and Kotlyar, 2019;Laureau et al, 2015). It assumes that the system fission matrix element a i,j is dependent only on the property of the destination cell i.…”

Section: Introductionmentioning

confidence: 99%

The Application of the Combined Fission Matrix Theory in Fast Reactors

Zhang

Liu

2021

Front. Energy Res.

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The combined fission matrix theory is a recently-developed hybrid neutron transport method. It features high efficiency, fidelity, and resolution whole-core transport calculation. The theory is based on the assumption that the fission matrix element ai,j is dominated by the property of the destination cell i. This assumption can be well explained in thermal reactors, and the combined fission matrix method has been validated in a series of thermal neutron system benchmarks. This work examines the feasibility of the combined fission matrix theory in fast reactors. The European Sodium Fast Reactor is used as the numerical benchmark. Compared to the Monte Carlo method, the combined fission matrix theory reports a 64 pcm keff difference and 8.3% 2D RMS error. The error is much larger than that in thermal reactors, and the correction ratio cannot significantly reduce the material discontinuity error in fast reactors. Overall, the combined fission matrix theory is more suited for thermal reactor transport calculations. Its application in fast reactors needs further developments.

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Section: Introductionmentioning

confidence: 99%