neutrons Control rods : Control rods made of a material that absorbs neutrtons are inserted into the ... -238 is not fissionable. It absorbs the neutrons and forms Pu-239 which is readily fissionable. All ... , Uranium-234 Uranium-235 (only naturally occurring fissionable material) 1Nuclear Energy? Two processes c
neutrons are then absorbed by the shielding material. All of the gamma rays in the system, both the ... low down the fast neutrons (those not directly absorbed) coming from the core to thermal energy by ... utilizing appropriate neutron attenuating shielding materials that are properly arranged. This slowing
neutron flux in the point of irradiation and by the activation cross section of the target material, the ... activation cross section is known. Because Cadmium absorbs almost all neutrons with energy lower than 0.4 ... This lab examines axial thermal flux distribution of the OSTR by the means of neutron activation