Kammala wannan jumla: A ranar 28 ga Maris, 1979, gazawar kayan aiki da kuskuren mai aiki ya ba da gudummawa ga asarar mai sanyaya da kuma narkewar ɓangaren tsakiya a
Gidan Wutar Lantarki na Nukiliya na Three Mile Island a Pennsylvania. Rashin aikin injiniya ya kara tsanantawa ta hanyar rashin nasarar farko na masu aiki da shuka don gane halin da ake ciki a matsayin hadarin hasara na sanyaya saboda rashin horo da kuma abubuwan da ke tattare da mutum, irin su zane-zane na hulɗar mutum-kwamfuta da ke da alaƙa da alamun da ke cikin dakin sarrafawa a cikin mai amfani da wutar lantarki. Musamman ma, wani ɓoyayyen haske mai nuna alama ya jagoranci wani mai aiki da hannu ya kawar da tsarin sanyaya na gaggawa na atomatik na reactor saboda mai aiki ya yi kuskure ya yi imanin cewa akwai ruwa mai sanyaya mai yawa a cikin reactor kuma yana haifar da sakin matsin tururi. Matsayi da rikitarwa na hatsarin ya bayyana a cikin kwanaki biyar, yayin da ma'aikatan Met Ed, jami'an jihar Pennsylvania, da membobin Hukumar Kula da Nukiliya ta Amurka (NRC) suka yi kokarin fahimtar matsalar, sadarwa halin da ake ciki ga 'yan jarida da kuma al'ummar yankin, yanke shawara ko hatsarin ya buƙaci ƙauracewar gaggawa, kuma a ƙarshe kawo karshen rikicin. Izinin NRC na sakin galan 40,000 na ruwan sharar gida mai guba kai tsaye a cikin Kogin Susquehanna ya haifar da asarar amincewa da 'yan jarida da al'umma.