Structural aspect of corium spill on VVER-1000 reactor pit floor slab

Vaitová, Michaela; Štemberk, Petr; Petřík, Martin; Zdarek, J.; Chvála, O.

doi:10.1016/j.pnucene.2018.04.026

Cited by 4 publications

References 10 publications

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Numerical analysis of VVER-440/213 concrete biological shield under normal operation

Khmurovska

Štemberk

Fekete

et al. 2019

Nuclear Engineering and Design

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The numerical approach for the coupled damage-creep modeling of concrete biological shield, which combines the current and the past knowledge regarding the effects of irradiation and temperature on concrete with the real measured and calculated neutron fluence and temperature distribution for VVER-440/213 reactors, is described in detail in this study. The proposed approach takes into account the real structural geometry as well as the real neutron fluence and temperature distribution and the latest knowledge about the effect of irradiation and temperature on concrete strength and stiffness. The radiation induced volumetric expansion and the thermal expansion of concrete are modeled. According to the results of the numerical simulation, the analyzed structure reaches critical damage within the time interval from 10.00 to 35.25 years of normal operation. The damage of the concrete biological shield of the VVER reactor will not affect the load-bearing function of the containment building, since the biological shield is self-bearing. The shielding properties of the biological shield may be reduced due to the appearance of the radial cracks, however, the concrete wall, which is situated right behind the biological shield, will ensure the necessary shielding. Therefore, the concrete biological shield of the VVER reactors can be considered as sacrificial structure and can be damaged without significant consequences. However, this study implies the importance of capability to predict the behavior of those PWR reactor biological shields which serve both the load-bearing and shielding purposes.

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Numerical analysis of VVER-440/213 concrete biological shield under normal operation

Khmurovska

Štemberk

Fekete

et al. 2019

Nuclear Engineering and Design

Self Cite

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Behavior of thermophysical properties of heat treated CaO.Fe2O3 at different temperature

Pandey

Duchaniya

Pandel

et al. 2019

1st International Conference on Advances in Mechanical Engineering and Nanotechnology (Icamen 2019)

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Microstructural Analysis of CaO-Fe2O3 Heat Treated at Different Temperature

Pandey

Jatav

Pandel

et al. 2020

J. Phys.: Conf. Ser.

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In present paper a study has been carried out to analyze the thermophysical properties and microstructural behavior of CaO.Fe2O3.A binary eutectic sample material is taken in the ratio of 22:78 by Wt. % in mixed powder form prepared manually. The sample powder is heat-treated at 950°C, 1050°C, and 1150°C for three hour holding time in programmable furnace. Further, the characterization is done with the help of different characterization technique like DSC, XRD, TGA to analyze its thermophysical properties and microstructural changes. This studies became necessary to analyze and interpret the data collected from prototype material found from nuclear severe accident occurred in the past. As heat transfer phenomena plays the crucial role in nuclear severe accident due to high temperature gradient developed inside the reactor vessel. Hence a non-prototype material is needed to study about heat transfer phenomena and in context of this study the material CaO.Fe2O3 is being considered. This study bears the first stage to validate the given material is simulant material. In the current study, heat absorbed, phase analysis, unit cell volume, melting point, crystallite size, dislocation density, and weight loss have been reported and analyzed.

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Structural aspect of corium spill on VVER-1000 reactor pit floor slab

Cited by 4 publications

References 10 publications

Numerical analysis of VVER-440/213 concrete biological shield under normal operation

Numerical analysis of VVER-440/213 concrete biological shield under normal operation

Behavior of thermophysical properties of heat treated CaO.Fe2O3 at different temperature

Microstructural Analysis of CaO-Fe2O3 Heat Treated at Different Temperature

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