Numerical Modeling of Point Defect Formation Processes During the Nuclear Power Plants Operation

Opyatyuk, Vladislav; Kozlov, Igor; Karchev, Kostiantyn; Turmanidze, Raul

doi:10.1007/978-3-031-16651-8_50

Cited by 1 publication

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“…The PD concentration in the sample depends on spatial coordinates and time [3]. Therefore, it can be found from the solution of a system of two diffusion equations describing the migration of PD, which closes the general system of equations ( 1)-( 5):…”

Section: Methodsmentioning

confidence: 87%

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Simulation of Point Defects Formation in the Fuel Element of a Nuclear Power Plant’s Wave Reactor

Opyatyuk,

Kozlov,

Karchev

et al. 2023

JES

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This paper considers the point defects that influence the operation of a wav nuclear power reactor with a uranium fuel medium. The formed individual point defects or such defect groups can produce a perturbing effect on the stability of the nuclear reactor operating mode and involve its transition to an unstable state. Studies have been carried out on the effect on the characteristics of the nuclear burnup wave in a medium with neutron multiplication for 2D geometry. For the calculation, the uranium-thorium fissile medium has been considered. The parametric calculations were carried out with 235 U different enrichment percents and different values of neutron activation energy. At that, it was assumed that the wave (flow) reactor stable operation region is located in the range of activation energies from 10–3 eV to 1 eV or in the region from 2 MeV to 8 MeV. When calculating the neutron flux intensity in a wave reactor, the influence of point defects and their aggregates on the decelerating elastically scattered neutrons’ flux density and the flux density of decelerating non-elastically scattered neutrons was considered. The dependences of the point defects formation rate on the medium fissile temperature for several compositions of the uranium-thorium medium are obtained. As visually identified, the graphic materials obtained during the calculations are similar to the photos of fuel rods after the energy campaign.

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Section: Methodsmentioning

confidence: 87%

“…The processes of the appearance of defects, depending on the processes occurring in fuel during the reactor operation, are considered in [3].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Point Defects Formation in the Fuel Element of a Nuclear Power Plant’s Wave Reactor

Opyatyuk,

Kozlov,

Karchev

et al. 2023

JES

Self Cite

View full text Add to dashboard Cite

show abstract

Numerical Modeling of Point Defect Formation Processes During the Nuclear Power Plants Operation

Cited by 1 publication

References 2 publications

Simulation of Point Defects Formation in the Fuel Element of a Nuclear Power Plant’s Wave Reactor

Simulation of Point Defects Formation in the Fuel Element of a Nuclear Power Plant’s Wave Reactor

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