Nuclear Fission

Describe the process of controlled fission of U-235 in the nuclear reactor

• U-235 is an unstable nucleus that absorbs a neutron

• U-235 splits into two smaller nuclei and 2/3 neutrons are also released

• This releases lots of gamma radiation and heat energy

• This heat energy is used to heat water in a nuclear reactor which turns into steam

• The steam turns a turbine which is connected to a generator that turns to produce electricity

How does a chain reaction work of U-235?

The neutrons produced in a fission reaction can be absorbed by other U-235 nuclei that further split into two smaller nuclei

What do control rods do in a nuclear reactor?

• Control Rods are made from Boron and absorbs unwanted neutrons to slow down the nuclear reaction

• They control how much energy you produce

What do moderators do?

Moderators slows down neutrons so they can be properly absorbed by unstable nuclei

What does shielding do in a reactor?

• Shielding absorbs ionising radiation and is made of thick concrete

• Because the neutrons and gamma rays released are highly penetrating ionising radiation