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- W1991456153 abstract "Abstract A new variationally-based Monte Carlo variance reduction (VVR) method is developed to improve the estimation of characteristic parameters for neutron shielding and criticality problems. The VVR method employs a variationally-motivated functional that processes “low-quality” global forward and adjoint flux estimates into “high-quality” characteristic parameter estimates, such as the transmitted current through a shield or an eigenvalue. The VVR functionals are more costly to evaluate than standard functionals used to obtain Monte Carlo estimates, but they are more accurate. In this paper we demonstrate that for mono-energetic 1-D shielding and eigenvalue test problems, the improvement in accuracy obtained from the VVR scheme outweighs the extra computational expense, yielding a significant gain in the figure of merit." @default.
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- W1991456153 date "2001-03-01" @default.
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- W1991456153 title "A variationally-based variance reduction method for Monte Carlo neutron transport calculations" @default.
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- W1991456153 doi "https://doi.org/10.1016/s0306-4549(00)00058-x" @default.
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