Mechanical response of biological shielding ring to variations in azimuthal neutron flux distribution

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00322580" target="_blank" >RIV/68407700:21110/18:00322580 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Mechanical response of biological shielding ring to variations in azimuthal neutron flux distribution

Original language description

In this paper, the mechanical response of concrete ring to prolonged exposure to neutron irradiation is investigated. A three-dimensional finite element model of the concrete ring has been created. The radiation effect, represented by neutron flux, is modeled by volumetric swelling of aggregates and degradation of the mechanical parameters of concrete, based on latest literature review. Three different cases of the azimuthal flux distribution (uniform, sinusoidal and irregular) have been considered in order to investigate its effect on the analyzed structural element. The nonlinear plastic behavior of concrete is defined by the "μ damage model". As a result, displacement, isotropic damage and principal tensile stresses are obtained. According to the results of the analysis, the azimuthal distribution affects strongly the structural performance of the concrete ring. Its shielding and load-bearing properties under exposure to irregular azimuthal flux distribution may be compromised, while the structural response to the uniform azimuthal flux distribution is more acceptable. The results of the analysis are discussed in detail and the neglected factors, both positive and negative, are described. The presented analysis shows the complexity of this important problem and demonstrates the necessity for the research in this area to be continued.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

<a href="/en/project/8F17002" target="_blank" >8F17002: The Effect of Chemical Composition of Concrete on Its Long-term Performance in Irradiated</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Mechanika 2018 Proceedings of the 23rd International Scientific Conference

ISBN

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ISSN

1822-2951

e-ISSN

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Number of pages

6

Pages from-to

83-88

Publisher name

Kaunas University of Technology

Place of publication

Kaunas

Event location

Druskininkai

Event date

May 18, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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