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Unformatted text preview: Shielding Computer Laboratory Overview: In this laboratory, you will use the PENTRAN (Parallel Environment Neutral-particle TRANsport) on your laptop; it is a finite difference code to solve the Boltzmann Transport Equation (BTE), to be solved for accurate computation of critical assemblies and radiation shielding problems. You will use PENTRAN to solve for the particle flux out of the end of a shield that resembles the geometry below. Part I: PreLab The BTE tracks neutrons, gamma rays, or X-rays—any “neutral particle” traveling through a system in a discrete number of vector directions, each located at specific points in 3-dimensionsional space, and in a specific energy “bin” or “group” g . The 3-D x-y-z BTE, discretized in angle (direction) and energy group, is (using spherical harmonics with the Legendre Addition Theorem for the scattering term): = + ∂ ∂ + ∂ ∂ + ∂ ∂ ) , , , , ( ) , , ( ) , , , , ( ) ( ϕ μ ψ σ ϕ μ ψ ξ η μ z y x z y x z y x z y x g g...
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This note was uploaded on 07/28/2011 for the course ENU 4930 taught by Professor Staff during the Summer '08 term at University of Florida.
- Summer '08