Disadvantage Factors in Slab Geometry by the P₂ Calculation

The theory of the P₂ calculation for a two-region cell in slab geometry is presented. In this treatment the boundary condition of Davison is employed. By this method an upper bound, furnished by the P₂ model, and a lower bound, furnished by a P₁ model, are obtained on the disadvantage factor. It is suggested that a single best estimate is normally the average of the two.