<prompt> Suro lamarra dunowa kәrnube dәn, U.S. Nuclear Regulatory Commissionye mundә PRAbe faidatә badiyono suronzan FTA suro saa 1975 dәn, kuru zaumaro kulashi PRAbe dunowa fuwuzana ngawo lamarra Three Mile Islandbe saa 1979 dәn  <response>: kǝla kǝnǝngabe. Adǝye sǝkǝ suro saa 1981 lan kitawu NRC Fault Tree Handbook NUREG0492 fǝlezǝna, kuru PRA faidatǝnzǝ kalkalro sǝdǝna suro NRCbe kǝla lamarra lamarra lamarra hawarrabe ladǝn. 