Reducing the Level of Power Vibrations in the NEPTUNE Pulsed Reactor

Dubna’s IBR-2 periodic pulsed research reactors are the most effective source of slow neutrons in extracted beams for studying various structures by using diffraction, small-angle scattering, reflectometry, inelastic scattering, and neutronography, thanks to their short-pulse neutrons and high avera...

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Veröffentlicht in:Physics of particles and nuclei letters 2021-05, Vol.18 (3), p.354-369
Hauptverfasser: Shabalin, E. P., Hassan, A. A., Rzyanin, M. V., Podlesnyy, M. M.
Format: Artikel
Sprache:eng
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Zusammenfassung:Dubna’s IBR-2 periodic pulsed research reactors are the most effective source of slow neutrons in extracted beams for studying various structures by using diffraction, small-angle scattering, reflectometry, inelastic scattering, and neutronography, thanks to their short-pulse neutrons and high average flux (reaching 10 14 cm –2 s –1 ). At the same time, due to the specificity of the kinetics, fluctuations in the power energy of pulses in such a reactor are tens of times higher than in stationary reactors and create problems when trying to control the apparatus. This paper proposes and substantiates a method to significantly reduce the level of fluctuations in the power pulses of such reactors using the NEPTUNE pulsed reactor project with the Np‑237 threshold isotope as a nuclear fuel as an example.
ISSN:1547-4771
1531-8567
DOI:10.1134/S1547477121030109