Reactivity of a Cube, Cylinder, and Sphere
A water-reflected cube of dry plutonium oxide is found to be more reactive than a sphere of the same mass and composition. MCNP6 ® criticality results for a cube, sphere, and cylinder of identical density, mass, and volume are discussed in the context of several hydrogenous reflectors. Similar geometric comparisons are made for a fast metal system based on 240 Pu Jezebel.
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEA↗