Abstract
Results of the investigation into the thermodynamics of two types of microfuel (with oxygen getter and without it) with plutonium fuel for various degrees of burnup are presented. The behavior of the trapped fraction of Ag, Ce, Cd, Cs, La, Mo, Pu, Pd, Ru, Sr, Te, and Y is investigated. The fraction of any fission product bound into stable chemical compounds with other components of the system and excluded from the diffusion process is called the trapped fraction. An abrupt increase in the trapped fraction of cesium and, correspondingly, a decrease in free cesium during the burnup of ∼26% FIMA (fissions per initial metal atom) or more are found for the microfuel containing no oxygen getter. This leads to a substantial nonlinear burnup dependence of the trapped fraction and should be the cause of an abrupt decrease in the Cs output from the microfuel. It seems likely that the found effect is associated with the formation of carbonate Cs2CO3 in the plutonium fuel. In the case of microfuel containing the oxygen getter, no formation of cesium carbonate occurs and the trapped fraction of cesium is almost independent of the burnup.
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References
Yu. G. Godin, Dispersed Nuclear Fuel Based on Micro Fuel Elements (Mosk. Inzh. Fiz. Inst., Moscow, 1989) [in Russian].
N. N. Ponomarev-Stepnoy, V. M. Makarov, A. S. Ivanov, I. A. Belov, T. Lindemer, D. McEachern, and J. Razvi, in Proceedings of the 4th International Topical Meeting on High Temperature Reactor Technology HTR2008, Sept. 28–Oct. 1, 2008, Washington, DC, USA, HTR2008-58081.
N. N. Ponomarev-Stepnoy, A. S. Ivanov, A. A. Rusinkevich, and G. V. Belov, in Proceedings of the International Topical Meeting on High Temperature Reactor Technology HTR 2010, Prague, Czech Republic, Oct. 18–20, 2010, Paper 33.
G. B. Sinyarev, N. A. Vatolin, B. G. Trusov, et al., The Use of Computers for Thermodynamic Calculations of Metallurgical Processes (Nauka, Moscow, 1982) [in Russian].
G. V. Belov, Mat. Model. 13(8), 9 (2001).
E. S. Glushkov, I. P. Nazarenko, I. G. Panevin, and N. N. Ponomarev-Stepnoi, Methods of Neutron Physical Calculation of Nuclear Reactors (Mosk. Aviats. Inst., Moscow, 2000) [in Russian].
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Original Russian Text © A.A. Rusinkevich, A.S. Ivanov, 2012, published in VANT. Fizika yadernykh reaktorov, 2012, No. 2, pp. 83–92.
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Rusinkevich, A.A., Ivanov, A.S. “Trapped fraction” effect in microfuel with plutonium fuel. Phys. Atom. Nuclei 76, 1681–1687 (2013). https://doi.org/10.1134/S106377881314007X
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DOI: https://doi.org/10.1134/S106377881314007X