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. (You can assume ? = 1.)

Table 19.1

?

Table 19.2

Os Nucleus Density g/cm3 of 232 Th 233U 235 U 238 U 11.7 < 10-6 7.34 7.34 13.0 18.7 531 45.3 576 12.2 18.7 585 98.7 684 15.1 18.9 1.68 x 10-5 2.68 2.68 9.30 U* 18.9 4.21 3.37 7.59 9.34 natural 239Pu 19.8 748 271 1019 7.99