<prompt> Bhala okuqhubekayo kwalesi sigaba - Ukukhathala ngenxa yokusebenza ngewashi kuye kwaba nengxenye ezinhlekeleleni eziningana zezimboni, kuhlanganise nenhlekelele yaseThree Mile Island  <response>: , nenhlekelele yesikebhe i-Space Shuttle 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. 