Harrisburg

The Three Mile IslandPermanently shutdown nuclear power plant near Harrisburg, ... Nuclear Power PlantThermal power plant, primarily used for electricity generati... with two pressurized water reactors is located near Harrisburg, Pennsylvania, USA. On 28th March 1979, a serious accidentUnplanned sequence of events which may result in an effectiv... with partial core meltdownIf the reactor core cooling fails, e.g. due to a major leaka... occurred in unit 2. The fission productsNuclides generated by fission or subsequent radioactive deca... were almost completely retained in the reactor pressure vesselThick-walled cylindrical steel vessel enclosing the reactor ... and in the containmentGastight case around a reactor and the circuit and auxiliary.... Since the retention function of the containmentGastight case around a reactor and the circuit and auxiliary... functioned as designed, only xenon-133 and very small proportions of I-131 were released into the environment, resulting in a calculated maximum doseMeasure of a radiation effect to be indicated more precisely... of 0.85 mSv.