<prompt> Qedela umusho olandelayo: Ukukhathala ngenxa yokusebenza ngama-shift kuye kwaba nomthelela ezinhlekeleleni eziningana zezimboni, kuhlanganise ne-  <response>: Ingozi yaseThree Mile Island, inhlekelele yesikhumbi-mkhathi i-Challenger nenhlekelele yaseChernobyl. Umbiko wokugcina we - Alaska Oil Spill Commission ngenhlekelele yokuchitheka kukawoyela i - Exxon Valdez wathola ukuthi kungenzeka ukuthi amahora amaningi okusebenza ayebangela ukukhathala kwabasebenzi, okwathi kamuva kwabangela ukuba umkhumbi ugingqike. 