Monte Carlo modeling of spallation targets containing uranium and americium

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:334

Article

Malyshkin, Yury¹  Pshenichnov, Igor^1,2  Mishustin, Igor^1,3  Greiner, Walter¹ 

[1] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

[2] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[3] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

关键词: Spallation reactions;    Minor Actinides;    Neutron sources;    Accelerator Driven Systems;    Radioactive waste;   

DOI  :  10.1016/j.nimb.2014.04.027

来源: Elsevier

【 摘 要 】

Neutron production and transport in spallation targets made of uranium and americium are studied with a Geant4-based code MCADS (Monte Carlo model for Accelerator Driven Systems). A good agreement of MCADS results with experimental data on neutron- and proton-induced reactions on Am-241 and Am-243 nuclei allows to use this model for simulations with extended Am targets. It was demonstrated that MCADS model can be used for calculating the values of critical mass for U-233,U-235, Np-237, Pu-239 and Am-241. Several geometry options and material compositions (U, U + Am, Am, Am2O3) are considered for spallation targets to be used in Accelerator Driven Systems. All considered options operate as deep subcritical targets having neutron multiplication factor of k similar to 0.5. It is found that more than 4 kg of Am can be burned in one spallation target during the first year of operation. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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