Author: V.A. Chemezov, R.S. Karimov
Reference: Patent, 24.05.2010, Ekaterinburg patent holder: Sverdlovsk Research Institute of Chemical Engineering
Keywords: treatment, metal, graphite, flux
Abstract: The invention is aimed to be used in nuclear power plants, nuclear industries and points of radioactive waste disposal. The treatment includes loading of the contaminated metallic waste and flux into the furnace, melting of metallic waste and removing of the melt and slag flux from the furnace. Before loading the waste and the flux into the furnace, layer of radioactively contaminated graphite is loaded and it is ignited in oxidizing medium, generated by the plasma of plasma torch furnace. Then, plasma torch is turned off and the fragmented metallic waste is loaded into the furnace, downward, from top to bottom, alternately by each layer.
URL: http://www.findpatent.ru/patent/243/2435241.html
Title: The University of Arizona Institutional Repository: Radiocarbon Volume 48 (2006) Number 3 RADIOACTIVE GRAPHITE DISPERSION IN THE ENVIRONMENT IN THE VICINITY OF THE CHERNOBYL NUCLEAR POWER PLANT
Author: Buzinny, Michael
Reference: The University of Arizona, Geosciences, May 2011
Keywords: graphite, soil, forest
Abstract: This paper estimates the radioactive graphite dispersion on the land surface (forest litter and soil) as a result of the Chernobyl Nuclear Power Plant (NPP) release. Graphite mass was calculated using an estimated average concentration of 2.5 × 107 Bq/kg C (carbon). The sample collection method, sample origin and its mass, and sample preparation procedure used for preparation of benzene were taken into account to obtain the optimum sensitivity of the method. Thus, the sensitivity of the corresponding method for graphite detection in forest litter was estimated to be 0.2 mg/m2. All analyses gave a range of deposited graphite from 0.12 to 52.6 mg/m2. The maximum value was observed at a site located 9 km west of the Chernobyl NPP. The results of the study indicate the importance of studying the upper layer of soil (0–5 cm) in addition to the lower layer of forest litter.
URL:http://digitalcommons.arizona.edu/holdings/journal/article?r=http%3A%2F%2Fradiocarbon.library.arizona.edu%2FVolume48%2FNumber3%2F451-458.pdf
