Fission, fusion

Cards (10)

Explain which feature of a nuclear fission reactor reduces the risks from high energy neutrons 
Using concrete and lead to shield and absorb neutrons
Nuclear fusion is another process that could be used to generate electricity. Describe the process of nuclear fusion. 
Two small light nuclei which join together to become one heavier nucleus, mass is lost and a lot of energy is created
Where does nuclear fusion occur naturally 
Centre of stars/stars
Explain the conditions required for nuclear fusion
high temperature is needed to increase the kinetic energy of the nuclei
high pressure is needed so that nuclei are close enough to collide
what is fission 
a very large nucleus splits into two smaller nuclei and it releases a lot of energy
features of fission  
low speed neutron , high heat produced
what does a control rod do 
absorbs neutrons, suitable material is boron
what does a moderator do 
slows down neutrons, reduces kinetic energy, suitable material can be graphite or water
what is shielding 
prevents irritation of workers, suitable material is thick concrete
what does a fuel rod do 
provide uranium fuel, suitable material is uranium