Fission Parameters Measurements for Np, Pu, Am, and Cm Isotopes Inside a Salt Blanket Micromodel
Yu. E. Titarenko, O. V. Shvedov, V. N. Konev, M. M. Igumnov, V. F. Batyaev, E. I. Karpikhin, V. M. Zhivun, A. B. Koldobsky, R. D. Mulambetov, D. V. Fischenko, S. V. Kvasova, E. F. Fomushkin, V. V. Gavrilov, G. F. Novoselov, A. V. Lopatkin, V. G. Muratov, A. F. Lositskiy, B. L. Kurushin, S. G. Mashnik, H. Yasuda
Abstract
The MAKET zero-power heavy water reactor has been used at ITEP to measure the fission characteristics of the Np, Pu, Am, and Cm isotopes in the 0.52NaF+0.48ZrF4 melt-filled salt blanket micromodel. The 237Np(n,f), 238Pu(n,f), 239Pu(n,f), 240Pu(n,f), 241Pu(n,f), 242mAm(n,f), 243Cm(n,f), 245Cm(n,f), 247Cm(n,f), 238U(n,f), 238U(n,g), 235U(n,f) fission reaction rates have been measured. The neutron spectrum in the isotope irradiation locations was monitored by measuring the rates of the (235U(n,f), 238U(n,g), 55Mn(n,g), 63Cu(n,g), 176Lu(n,g), 197Au(n,g), 115In(n,n'), 27Al(n,4He), and 64Zn(n,p)) reactions whose cross sections have been commonly accepted. The measured functionals are compared with the respective results of MCNP code simulation obtained using the ENDF/B6 and JENDL3.2 neutron databases.
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