During the week that followed the March 11 earthquakes and tsunamis that hit Japan, reactors 1, 3 and 4 at the Fukushima Daiichi nuclear plant exploded.  Yet Reactor 2 spewed the most radiation.

Contract workers at the plant say they heard an explosion inside Reactor 2, but TEPCo officials swear no explosion took place.  Independent researchers claim that Reactor 2 has emitted more radiation than the reactors that exploded!

Scientists (not working for TEPCo) say the most probable reason is that the containment vessel around the core was breached.  TEPCo also denies that.

TEPCo officials simply state that “somehow” radioactive gas escaped Reactor 2.