Implementation and performance study of the lp-CMFD acceleration scheme for Monte Carlo method based k-eigenvalue neutron transport calculation in 1D geometry

Chan, Yimeng; Xiao, Sicong

doi:10.1016/j.anucene.2021.108562

Cited by 1 publication

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This instability is corrected with the implementation of linear prolongation flux update, as the lp-CMFD scheme consistently able to converge properly and yield the expected acceleration. It is however noted that the acceleration obtained in 1D MC transport calculations as reported by Chan and Xiao (2021) was much greater in terms of percentage decrease in inactive cycles required. It is clear that the linear prolongation schemes outperform the regular coarse mesh flux update in all cases investigated in this work.…”

Section: Results and Analysismentioning

confidence: 83%

“…The lp-CMFD scheme has been employed in deterministic transport problems with various spatial discretisation schemes, which demonstrated improved acceleration and stability (Chan and Xiao, 2019a;Chan and Xiao, 2019b;Chan and Xiao, 2019c;Chan and Xiao, 2020a;Chan and Xiao, 2020b). Following the results in deterministic calculations, lp-CMFD and lp-pCMFD schemes has also been employed in 1D slab MC transport calculations (Chan and Xiao, 2021), as well as in a 2D homogenous slab (Abdullatif and Wang, 2022;Than and Xiao, 2022), where its effectiveness relative to regular CMFD is once again demonstrated. Among the CMFD variants investigated in the aforementioned works, the most efficient scheme can vary depending on factors such as the total cross section values.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

lp-CMFD acceleration schemes in multi-energy group 2D Monte Carlo transport

Than

Xiao

2022

Front. Energy Res.

View full text Add to dashboard Cite

The linear prolongation flux update scheme is extended to both regular CMFD acceleration, as well as partial CMFD acceleration in 2D multi energy group Monte Carlo k-eigenvalue neutron transport problems. The acceleration performance of these CMFD variants were investigated in simple 2D slab geometries, first with a monoenergetic case and then with a three group problem on the same geometry based on the monoenergetic cross sections. Flux convergence was determined via an on-the-fly convergence diagnostics developed by Ueki and Brown. It is found that on top of providing better acceleration in general, the linear prolongation scheme is also able to correct for instabilities in the CMFD scheme. Overall, the lp-pCMFD scheme employing a maximum history length is found to have the best performance across the cases presented.

show abstract

Section: Results and Analysismentioning

confidence: 83%