1D2G - Neutron Diffusion Solver
1 Dimension, 2 energy Groups, multiple regions, JavaScript diffusion equation solver.
(c) Prof. Danon 2012

1D2G is a diffusion equation solver that works with 1 or 2 energy groups and multiple spatial regions in 3 geometries.
It is used in for teaching in MANE 4480 - Physics of Nuclear Reactors

Input Parameters

Geometry Slab SemiCylinder Sphere
Regions:

Cross Sections

1.263000 0.012000 0.008476 0.014000 0.354000 0.121000 0.185000 0.000000 1.130000 0.000400 0.000000 0.049000 0.160000 0.020000 0.000000 0.000000

Cross Sections for Region 1, Group 1 (fast)
Cross Sections for Region 1, Group 2 (thermal)
Cross Sections for Region 2, Group 1 (fast)
Cross Sections for Region 2, Group 2 (thermal)
(use only one space between numbers)

Dimensions

From To dr[cm] mat

start-index end-index dr[cm] material-index (region-1)
start-index end-index dr[cm] material-index (region-2)
(use only one space between numbers)

0 98 0.2 1 98 247 0.1 2

Solve

Results

K = , Iterations =   K-convergence=10^-6