fission of uranium-235 (U-235) can be represented as follows: U235 + n1 → Ba141 + Kr92 + 3n1 But for nuclear rocket, you want your U-235 to be reticulated in graphene tape and to fission one atom at a time. This means you don’t get the 3n at the end of the above equation. You … Continue reading For explosion you want a chain reaction that consumes your entire piece of U-235.