What happened during 3 mile Island disaster?
Book: TMI 25 years later Quote Alarms went off. An auxiliary feedwater system should have started automatically but it did not. The auxiliary system was to provide emergency source of cooling water to the steam generators, however, critical valves in the system were left closed. Without this critical water supply, the boiling water in the steam generators would boil away completely. A rapid rise in temperature and pressure occurred in the reactor’s cooling system. A pressure-regulating valve opened to reduce pressure in the reactor and associated reactor systems Steam began flowing from the valve through piping into a collecting tank in the basement of the reactor containment building. The water was contaminated with radioactive material. The flow caused the pressure to decrease. The pressure regulating valve should have closed but it didn’t. The operators had no way of monitoring the valve and therefore did not know it remained open. What happened on this day that was out of the ordin
