- Energy/Temperature Discretization
- Solves 2 T + Multi-Group Even-Parity Equations
- Can yoke
*T*_{e}and*T*_{i}together to make 1 T - Can use a single-group radiation treatment to make 3 T

- Angular Discretization
- Uses Simplified Spherical Harmonics --
*SP*_{N} - Can do a
*P*_{1}(diffusion-like) solution

- Uses Simplified Spherical Harmonics --
- Spatial Discretization
*SP*_{N}decouples equations into many diffusion equations- Diffusion equations are solved by Augustus

- Temporal Discretization
- Linearized implicit discretization
- Equivalent to one pass of a Newton solve
- Iteration strategy:
- Source iteration
- DSA acceleration
- LMFG acceleration

Michael L. Hall