<prompt> Pedzisa mutsara unotevera: Matambudziko aStone Webster pakuvaka nzvimbo dzesimba dzenguva dzose akaenzaniswa nezvinetso zvaro mukuvaka kwenyukireya. Pakupera kwema1970, kambani yakanga yawana basa guru muindasitiri yesimba renyukireya - chikamu chakakosha chesimba renyukireya rose muUnited States chakanga chichigadzirwa muzvirimwa zvakagadzirwa nekugadzirwa neStone Webster. Muna 1975, kambani yacho yakanga yasarudzwa kuvaka Clinch River Breeder Reactor. Zvisinei, kushorwa kuri kuwedzera kwevanhu pakuvakwa kwenzvimbo dzesimba renyukireya, kunonoka kwenguva refu kunokonzerwa nekukwikwidza pamberi pemakomisheni ehurumende, uye kuwedzera kunoenderana kwemitengo yekuvaka chirimwa, yakaganhurirwa ne  <response>: tsaona yeThree Mile Island muna 1979, yakakonzera kumiswa kwekuvakwa kwenzvimbo huru dzesimba renyukireya uye kukanzurwa kwemirairo yakawanda iripo. 