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Structural and radiological characterization of irradiated RBMK-1500 reactor graphite
Elena Lagzdina,Danielius Lingis,Arturas Plukis,Rita Plukiene,Darius Germanas,Andrius Garbaras,Jevgenij Garankin,Arunas Gudelis,Ilja Ignatjev,Gediminas Niaura,Sergej Krutovcov,Vidmantas Remeikis 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.1
This study aims to characterize the irradiated RBMK-1500 nuclear graphite in terms of both structuraland radiological properties. The experimental results of morphological and structural analysis of theirradiated graphite samples by using SEM, Raman spectroscopy as well as the theoretical evaluation ofprimary displacement damage are presented. Moreover, the experimental and theoretical evaluation ofthe neutron flux is provided and the presence of several g emitters in the analyzed graphite samples isassessed. Furthermore, the improved version of rapid analysis method for 14C activity determination isapplied and the experimentally obtained results are compared with calculated ones. Results indicate thatstructural changes are uniform enough in all the analyzed samples. However, the distribution of radionuclidesis non-homogeneous in the irradiated RBMK-1500 reactor graphite matrix. The comprehensiveunderstanding of both structural and radiological characteristics of nuclear graphite is veryimportant when dealing with decision about irradiated graphite waste management strategy or treatmentoptions prior to its final disposal.