<prompt> Nyorera kupfuurira kweiyi ndima - Mukati meindasitiri yesimba renyukireya, US Nuclear Regulatory Commission yakatanga kushandisa nzira dzePRA kusanganisira FTA muna 1975, uye yakawedzera zvakanyanya kutsvagisa kwePRA zvichitevera tsaona ya1979 kuThree Mile Island  <response>: . Izvi zvakazopedzisira zvaita kuti muna 1981 bhuku rinonzi NRC Fault Tree Handbook NUREG0492 ribudiswe, uye kushandiswa kwePRA kunomanikidzwa pasi pechiremera cheNRC. 