Muindasitiri yesimba renyukireya, anoshandiswa mumvura ine radioactive tsvina, mhepo, exhaust gasi, uye fluid midhiya kudzikisa zvinobuditsa kuburitswa kwezvinhu zveradioactive, kuve nechokwadi chekuchengetedza kwevashandi uye nharaunda, uye kugadzirisa kugadzirwa kwemagetsi.