Fission occurs when a neutron strikes a U-235 nucleus, splitting it into smaller fragments, releasing massive thermal energy and additional neutrons (chain reaction).
Control Rods
Made of neutron-absorbing materials (like Cadmium or Boron), these are inserted into the core to slow or halt the fission chain reaction. Retracting them speeds it up.
Primary Loop vs Secondary Loop
In a Pressurized Water Reactor (PWR), the radioactive primary coolant never touches the water boiling into steam. This containment prevents outside radioactive contamination.
Tags
APESEnergyUraniumPWR
Reactor Control System
Adjust the control rod depth to regulate the fission chain reaction. Lower depth = fewer neutrons = cooler core.
Control Rod Depth
Inserted %80%
At 100%, rods absorb nearly all free neutrons, stopping fission. At 0%, fission proceeds uncontrolled (Meltdown risk).