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Science and Technology of Nuclear Installations
Volume 2015 (2015), Article ID 104739, 23 pages
http://dx.doi.org/10.1155/2015/104739
Research Article

Transuranics Transmutation Using Neutrons Spectrum from Spallation Reactions

1Eletrobrás Termonuclear S.A.-ELETRONUCLEAR, Departamento GEI.T, BR 101 Sul-Rodovia Governador Mário Covas Km 517, 23948–000 Angra dos Reis, RJ, Brazil
2Programa de Pós-graduação em Ciências e Técnicas Nucleares (PCTN), Departamento de Engenharia Nuclear, Escola de Engenharia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
3Instituto Nacional de Ciência e Tecnologia de Reatores Nucleares Inovadores/CNPq, Brazil

Received 14 October 2014; Revised 20 March 2015; Accepted 20 March 2015

Academic Editor: Alejandro Clausse

Copyright © 2015 Maurício Gilberti et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim is to analyse the neutron spectrum influence in a hybrid system ADS-fission inducing transuranics (TRUs) transmutation. A simple model consisting of an Accelerator-Driven Subcritical (ADS) system containing spallation target, moderator or coolant, and spheres of actinides, “fuel,” at different locations in the system was modelled. The simulation was performed using the MCNPX 2.6.0 particles transport code evaluating capture and fission reactions, as well as the burnup of actinides. The goal is to examine the behaviour and influences of the hard neutron spectrum from spallation reactions in the transmutation, without the contribution or interference of multiplier subcritical medium, and compare the results with those obtained from the neutron fission spectrum. The results show that the transmutation efficiency is independent of the spallation target material used, and the neutrons spectrum from spallation does not contribute to increased rates of actinides transmutation even in the vicinity of the target.