The Chernobyl Lesson

On April 26, 1986, reactor number four at the Chernobyl plant in Ukraine failed catastrophically during a safety test. Operators disabled multiple safety systems, then let the reactor reach an unstable low-power state. When they tried to recover, a sudden surge in reactivity triggered a steam explosion that blew the roughly 2,000-ton upper shield off the reactor. The graphite moderator caught fire, sending a plume of radioactive material across Europe. The lesson was not that nuclear energy is inherently dangerous — it was that ignoring safety protocols and skipping proper containment creates catastrophic risk.