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Spatial Effect as a Consequence of a Mismatch between the Detector Signal and the Averaged Neutron Flux Density

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The transient processes induced in a water-moderated and -cooled reactor by prolonged (several seconds) insertion of absorbing rods into the reactor are analyzed using experimental and computational data. The change in the neutron flux density in core regions, forming the detector signal, during the motion of the rods, and the subsequent change in the distribution of delayed-neutron sources are examined. The spatial effect of the reactivity is determined from the coefficient of nonuniformity of the neutron flux density. The conditions under which regression analysis can be used to determine the efficiency of the rods are discussed.

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  1. Aleksandrov Research Technological Institute (NITI), Sosnovyi Bor, Leningradskaya Oblast, Russia

    N. A. Vinogorov

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  1. N. A. Vinogorov
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Translated from Atomnaya Énergiya, Vol. 114, No. 1, pp. 8–12, January, 2013.

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Vinogorov, N.A. Spatial Effect as a Consequence of a Mismatch between the Detector Signal and the Averaged Neutron Flux Density. At Energy 114, 8–13 (2013). https://doi.org/10.1007/s10512-013-9662-6

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  • DOI: https://doi.org/10.1007/s10512-013-9662-6

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