Consider an infinite, homogeneous reactor fueled with uranium enriched to 3% and moderated by graphite with a ratio of graphite:uranium of 800:1. Find k. To find p, you can ignore the uranium when computing and in the calculation of the scattering cross section. Moderator Material Density Atomic mass (A) Z [g/cm] [barns] [barns] HO 1.0 18 0.664 49.2 0.920 DO 1.1 20 1.2 x 10-3 10.6 0.509 C 1.6 12 3.37 x 10-3 4.94 0.158