The Permanently shutdown nuclear power plant near Harrisburg, ... Thermal power plant, primarily used for electricity generati... with two pressurized water reactors is located near Harrisburg, Pennsylvania, USA. On 28th March 1979, a serious Unplanned sequence of events which may result in an effectiv... with partial If the reactor core cooling fails, e.g. due to a major leaka... occurred in unit 2. The Nuclides generated by fission or subsequent radioactive deca... were almost completely retained in the Thick-walled cylindrical steel vessel enclosing the reactor ... and in the Gastight case around a reactor and the circuit and auxiliary.... Since the retention function of the Gastight 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 Measure of a radiation effect to be indicated more precisely... of 0.85 mSv.