The invention discloses a device and a method for disposing low and medium-radioactivity
solid waste by hot plasmas. The device comprises a
plasma melting gasification furnace, a hot
plasma generator, a working gas preparation supply device, a cooling
water supply device, a feeding device, a glass solidified body discharging and receiving device, a
tail gas purification treatment device and corresponding measuring, controlling and monitoring systems. Organic and inorganic carbonaceous compositions in the waste are gasified by the hot plasmas in a low-temperature area of a
hearth, generated ash and inorganic substances in the waste are melted in a high-temperature area of the
hearth, added glass organizers are regulated so that radioactive nuclides are stably fixed in glass organizers, and
flue gas meets emission requirements of air quality standards after being subjected to purification treatment. Besides, the device and the method for disposing the low and medium-radioactivity waste are environment-friendly, a disposal process is safe and reliable, disposal storage space for
radioactive waste can be greatly reduced, national emission standards are met, and the purpose of minimized and stabilized disposal for the
radioactive waste is achieved.