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e-Article

Adjoint-based uncertainty analysis for essential reactions in a laser inertial fusion engine
Document Type
article
Source
Fusion Science and Technology. 60(2)
Subject
Energy
Atomic
Molecular
Nuclear
Particle and Plasma Physics
Atomic
Molecular
Nuclear
Particle and Plasma Physics
Language
Abstract
This study establishes a procedure for constructing explicit and adjoint-based implicit sensitivities with MCNP5. Using these methods, an instantaneous sensitivity-based uncertainty analysis is performed on the depleted uranium hybrid LIFE (Laser Inertial Fusion Energy) blanket. Explicit sensitivities and uncertainties are calculated for (n, 2n), tritium production, fission, and radiative capture reaction rates during the fuel lifecycle. Nuclear data uncertainties and Monte Carlo counting precision are compared in a convergence study and the compounding of the two is quantified to gauge the validity of the analysis. A multi-group cross-section library is generated for adjoint calculations and selected adjoint distributions are shown and discussed.