apples

hey everyone im doing this thing on nuclear fission and the more i read the more confused im getting lol, some questions: Are there any other decay reactions insides a nuclear core besides ‘236U – Ba + Kr + 3n’ How are slow moving neutrons injected into the reactor core of a nuclear power plant If fast moving neutrons from a fission reaction cannot effectively enter a nucleus and initiate fission more fission (too fast), how does it work in a fission bomb? Is there a moderator present? ty