station blackout

A station blackout is a critical event in nuclear reactor safety where the main power supply to the station fails, and backup power systems are also lost. This loss of power is significant because it disables essential safety systems, such as the emergency core-cooling system and circulating pumps, which are necessary to remove decay heat from the reactor core. Without these systems, the core can overheat, leading to a meltdown, as seen in the Fukushima Daiichi accident. The Fukushima incident highlighted how external events like earthquakes and tsunamis can trigger station blackouts by damaging both primary and backup power sources. Proper design, including robust emergency power systems like diesel generators and battery supplies, is crucial to prevent catastrophic outcomes during a station blackout.12