Abstract
Reactions resulting in the accumulation of 3He and 6Li, whose thermal neutron capture cross-section is large, occur under the action of neutron radiation in the beryllium blocks of the MIR reactor core. When a neutron absorber accumulates in the moderator of a reactor, important physical characteristics change: reactivity access, efficiency of safety and control rods, and reactivity effects; in addition, energy release is redistributed. An algorithm for calculating 3H, 3He, and 6Li in each beryllium block of the core has been developed and implemented. This algorithm makes it possible to follow the change in the concentration of these nuclides during reactor operation and shutdown. The 3He and 6Li concentrations are used as initial data for calculating the neutron-physical characteristics of the MIR reactor using the MCU and BERCLI programs. The computational results for the effect of the accumulation of the nuclides indicated on the neutron-physical characteristics of the core are presented.
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References
V. V. Goncharov, Research Reactors. Creation and Development, Nauka, Moscow (1986).
K. H. Beckurtz and K. Wirtz, Neutron Physics, Springer-Verlag, NY (1964) [Russian translation, Atomizdat, Moscow (1968)].
O. V. Anisimkov, V. V. Kalygin, A. P. Malkov, and V. V. Pimenov, “Effect of beryllium poisoning on the neutron-physical characteristics of the MIR reactor,” Vopr. At. Nauk. Tekh., Ser. Yad. Tekh. Tekhnol., No. 1, 49–52 (1993).
V. V. Kalygin, A. P. Malkov, and V. V. Pimenov, “Influence of beryllium poisoning on the neutron-physical characteristics of the MIR reactor,” in: Proceedings of the Scientific Research Institute of Nuclear Reactors, Dimitrovgrad (1997), No. 4, pp. 47–62.
A. F. Grachev, A. L. Izhutov, V. V. Kalygin, et al., “Series of works on improving and increasing the service life of the MIR reactor,” in: Use and Operation of Research Reactors, Dimitrovgrad, NIIAR, Vol. 1, 240–248 (2005).
Yu. E. Vaneev, A. P. Malkov, and M. Yu. Tikhonchev, “Verification of the BERCLI engineering program on experimental data from the critical assembly of the MIR.M1 reactor,” in: Neutronics-99, Obninsk (2000), p. 36.
E. A. Gomin, M. I. Gurevich, L. V. Maiorov, and S. V. Marin, “Description of the application and instructions for using the MCU-RFFI program for performing Monte Carlo calculations of the neutron-physical characteristics of nuclear reactors,” Preprint IAÉ-5837/5 (1994).
L. P. Abagyan, N. O. Bazazyabts, M. N. Nikolaev, and A. M. Tsibulya, Group Constants for Calculating Reactors and Protection, Énergoatomizdat, Moscow (1981).
W. Press, S. Teukolsky, W. Vetterling, and B. Flannery, Numerical Recipes for FORTRAN 77, The University of Cambridge (1992).
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Translated from Atomnaya Énergiya, Vol. 104, No. 2, pp. 84–88, February, 2008.
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Kalygin, V.V., Malkov, A.P. & Pimenov, V.V. Effect of 3He and 6Li accumulation in beryllium blocks on the neutron-physical characteristics of the MIR reactor. At Energy 104, 114–119 (2008). https://doi.org/10.1007/s10512-008-9009-x
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DOI: https://doi.org/10.1007/s10512-008-9009-x