What is the effect of failure of coolant system in a coolant stem in a nuclear reactor?

The failure of the coolant system in a nuclear reactor can lead to overheating of the reactor core, as the coolant is essential for removing excess heat generated during fission. If the temperature rises significantly, it can result in a meltdown of the core materials, potentially releasing radioactive materials into the environment. This scenario poses severe safety risks, necessitating immediate emergency procedures to prevent catastrophic outcomes. Additionally, the failure can compromise the integrity of containment structures designed to prevent radiation leakage.