The modernization of the VVR-Ts core by installation of beryllium reflectors was analyzed. Calculations showed that the arrangement of beryllium blocks in six cavities at the core periphery makes it possible to install an additional experimental channel for producing radionuclides. In addition, the configuration of the remaining part of the core does not change and there is no substantial influence on the reactivity characteristics of the CPS rods. The neutron flux density of the standard core and a core with beryllium blocks at the periphery differs by less than 6.5%.
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V. V. Kolesov, O. Yu. Kochnov, Yu. V. Volkov, et al., “Development of a precision model of the VVR-Ts reactor for further optimization of its design and the production of 99Mo and other radionuclides,” Izv. Vyssh. Uchebn. Zaved. Yad. Energet., No. 4, 129–133 ( 2011).
O. Yu. Kochnov, V. V. Kolesov, and R. V. Fomin, “Improvement of neutron-physical characteristics of VVR-Ts by replacing part of the fuel assembly of the active zone with a beryllium reflector,” At. Energ., 118, No. 4, 191–193 (2015).
O. Yu. Kochnov and V. V. Kolesov, “The effect of a beryllium reflector placed in the core of the VVR-Ts reactor on its neutronic characteristics,” Izv. Vyssh. Uchebn. Zaved. Yad. Energet., No. 2, 22–25 (2012).
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Translated from Atomnaya Énergiya, Vol. 125, No. 3, pp. 146–148, September, 2018.
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Kochnov, O.Y., Kolesov, V.V., Fomin, R.V. et al. Possibility of Increasing the Number of Experimental Channels in VVR-Ts by Changing the Core Design. At Energy 125, 162–164 (2019). https://doi.org/10.1007/s10512-018-00460-7
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DOI: https://doi.org/10.1007/s10512-018-00460-7