Mondays at 11:00 & 11:30 pm
When a hose broke while workers were unloading pressurized chlorine
gas from a railway tank car at a plant, about 48,000 pounds of chlorine
gas was released over a three-hour period. Conforming with industry
standards, the tank car was equipped with a chlorine detector and
emergency valves that automatically shut down when high levels of
chlorine are detected. However, once the chlorine release occurred,
the valves did not shut down automatically and further attempts
by the operation manager to shut them off manually failed as well.
Experts must uncover what caused the hose to break and why the emergency
valves failed to shut.