摘要:
Disclosed is a method and device for collecting particulate contaminants removed using a CO2 decontamination medium from an early step of a decontamination process. The device removes particulate contaminants from a contaminated subject by a decontamination stream, and simultaneously forms another stream for collecting such contaminants into a collecting filter, thus preventing such contaminants from diffusing into the atmosphere. The device forms streams between the nozzles and the surface of the contaminated subject to readily move the nozzles along the surface of the subject without frictional resistance, to reduce the sense of fatigue of the operator. The method and device are advantageous in that when the device is readily used with a conventional CO2 blasting decontamination unit to collect particulate contaminants, removal of particulate contaminants from a contaminated subject and collection of particulate contaminants contained in the decontamination stream are simultaneously performed, also allowing compressed gas blasted through air curtain blasting nozzles to prevent contaminated gas from diffusing into the atmosphere.
摘要:
A method and an apparatus for electrokinetically decontaminating the soil contained in a radioactive waste drum are disclosed. The radioactively contaminated soil is put into drums, and the drums are carried to a temporary storage or to a disposal site. If the extremely low level radioactive soil is decontaminated rather than carrying the soil to the temporary storage or to a disposal site, and if the decontaminated soil is returned to the nature, then the limited storage capacity can be saved. Further, if a high level radioactive soil is treated to a low level one, and if thus a low level radioactive soil is stored in a storage, then the safety is improved. In the present invention, electrodes are buried into the contaminated soil contained in a radioactive waste drum, and a dc current is supplied, so that the radioactive nuclide and impurities can be removed by the electroosmosis and the electromigration. The anode includes: (1) at least 3 or more metal tubes made of titanium or zircaloy and having a diameter of 5 cm or less; (2) at least 6 or more metal rods made of stainless steel, titanium, or zircaloy; and (3) stainless steel sieves. The cathode is a tube made of carbon steel, stainless steel, or palladium, and has a diameter of 10 cm or less.
摘要:
The present disclosure provides a solidifying method of a radionuclide. The solidifying method of the radionuclide includes operations of: providing a low melting point glass including Bi2O3, B2O3, ZnO and SiO2; providing a glass mixture mixing a mixture to be treated containing a hydroxide of radionuclide and BaSO4 and the low melting point glass; and heating the glass mixture.
摘要:
Disclosed is a method and device for collecting particulate contaminants removed using a CO2 decontamination medium from an early step of a decontamination process. The device removes particulate contaminants from a contaminated subject by a decontamination stream, and simultaneously forms another stream for collecting such contaminants into a collecting filter, thus preventing such contaminants from diffusing into the atmosphere. The device forms streams between the nozzles and the surface of the contaminated subject to readily move the nozzles along the surface of the subject without frictional resistance, to reduce the sense of fatigue of the operator. The method and device are advantageous in that when the device is readily used with a conventional CO2 blasting decontamination unit to collect particulate contaminants, removal of particulate contaminants from a contaminated subject and collection of particulate contaminants contained in the decontamination stream are simultaneously performed, also allowing compressed gas blasted through air curtain blasting nozzles to prevent contaminated gas from diffusing into the atmosphere.