Calculate the probability that a 2 MeV neutron will undergo first collision in 3/9 inch dia. UO2 fuel rod enriched to 4%. Assume that the neutron originated in the center of the rod and travels...

Calculate the probability that a 2 MeV neutron will undergo first collision in 3/9 inch dia. UO2 fuel rod enriched to 4%. Assume that the neutron originated in the center of the rod and travels radially. The fuel rod has density which is 94% of the theoretical fuel density (equal to 10.96 g/cm3 ).