PH-687
Fission and fusion
Physics · Secondary 3 · Hard · Fission and fusion
In a nuclear power station using uranium-235, why are control rods inserted further into the reactor core when the power output becomes too high?
- They absorb more neutrons, so fewer fission reactions occur
- They reflect more neutrons back into the fuel rods
- They cool the fuel so each fission releases less energy
- They increase the number of neutrons released per fission
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.