Part 1: The similarities and differences
I was recently buying brakes for my bicycle, and I described these to a colleague as safety critical features when I bumped into him in the shop. That made me think that bicycles are similar to nuclear reactors, and I thought it may be useful to explore this metaphor to help people not familiar with nuclear reactors learn about them.
Of course, there are enormous differences between bicycles and nuclear reactors, but as a metaphor, this may work. Nuclear reactors require a large team of scientists and engineers to operate and maintain the reactor, while a bicycle is usually operated by one person, and many parts of a bicycle can be easily maintained without the help of an expert. One of the biggest differences is in the way bicycles are regulated compared to nuclear reactors. Anyone can buy a bicycle and ride it on public roads, while the nuclear power industry is heavily regulated and controlled.
Most people are familiar with bicycles, and have probably ridden one. The same can’t be said of nuclear reactors which are understood by scientists and engineers working in the nuclear industry. So, what are the similarities between a bicycle and a nuclear reactor?
- Nuclear reactors use nuclear fuel to generate heat which is used to drive a turbine to produce electricity.
- Bicycles use human power to rotate cranks which drives a chain to produce motion.
- Operators control the nuclear reactor from a central control room maintaining and changing power while monitoring the plant and safety equipment.
- A cyclist controls a bicycle maintaining speed and direction while monitoring their environment.
Bicycles and cyclists have safety features which prevent accidents as well as safety features which reduce the consequences of accidents. Brakes are used to slow down and stop, high visibility clothing allows others to readily see the cyclist while lights and reflectors increase visibility in poor light. A helmet reduces the likelihood of injury to the head if an accident happens.
Nuclear reactors also have safety features which prevent accidents or reduce the consequences of these. Like the brakes on a bicycle, control rods are inserted or removed from the reactor core to control the power or to stop the reactor. In the event of an accident, containment prevents the release of radionuclides into the environment.
A cyclist maintains balance by traveling fast enough so the bicycle does not fall over. A reactor also maintains a balance of neutrons to ensure that a nuclear chain reaction is sustained. This balance of neutrons is known as criticality and is essential to keep a nuclear reactor generating.
