Nuclear Physics and Atomic Energy

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Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English, Russian
  Periodicity: 4 times per year

  Open access peer reviewed journal


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Nucl. Phys. At. Energy 2018, volume 19, issue 1, pages 21-30.
Section: Atomic Energy.
Received: 19.07.2017; Accepted: 22.03.2018; Published online: 12.05.2018.
PDF Full text (ru)
https://doi.org/10.15407/jnpae2018.01.021

Study of the properties of self-sustaining nuclear chain reaction in the fuel-containing masses of the "Ukryttya" object for the case of varying velocity of water inflow

V. A. Babenko1,2, V. N. Pavlovych2,3,*

1 Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
2 Institute for Safety Problems of NPPs, National Academy of Sciences of Ukraine, Kyiv, Ukraine
3 Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine


*Corresponding author. E-mail address: pavlovich@kinr.kiev.ua

Abstract: The main peculiarities of ignition and development of self-sustaining nuclear chain reaction (SCR) in fuel-containing masses (FCM) of Chernobyl "Ukryttya" were studied for the case of varying velocity of water incoming into the system or its outcoming. On the basis of analysis and numerical solution of the corresponding system of differential equations for the main characteristics of the system, it was shown that the variations of water inflow could lead to very sufficient and various changes in SCR development comparing to possible modes at constant velocities of water inflow. In particular, the calculations show that the neutron bursts with great amplitude could take place in the system under definite sufficiently reasonable physical conditions. It was also shown that the increase of velocity of water inflow into the FCM in the mode of constant oscillations can lead to transition into "beyond critical" state which is the subcritical state with big quantity of water.

Keywords: nuclear chain reaction, fuel-containing masses, neutron flux.

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