Glossary

CSG

Constructive Solid Geometry. Components constructed form simpler regions using transformations and boolean operations. In the contents of this manual, all regions are defined by a set number of parameters, as opposed to an arbitrary surface definition (that is, a parametric modeling approach is used).

MCNP

Monte Carlo N-Particle Transport Code

MGRAC

Multi-Group Reactor Analysis Code

MTR

Material Testing Reactor

homogenized cross section

Defined as the total reaction rate over a volume \(V\) divided by the average flux:

\[\frac{\Simga_{i\in Isotopes}\int_{V}\, dr N_i(r)\sigma^i_}\]