The Effect of Elevated Temperatures and Nuclear Radiation on the Properties of Biological Shielding Concrete

Koťátková, Jaroslava; Zatloukal, Jan; Reiterman, Pavel; Patera, Jan; Hlaváč, Zbyněk; Brabec, Petr

doi:10.4028/www.scientific.net/kem.677.8

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…Important chapter of such task is the design of plugs and seals for safe encasement of the waste underground. Suitable choice of materials from which is made out plug with use appropriate technologies and design practices in relation to the surrounding environment is crucial [11]. The environment defines specific local geological and hydrological conditions.…”

Section: Discussionmentioning

confidence: 99%

The Issue of Underground Depositing of High Radioactive Waste

Kočová

Říhová

Zatloukal

2016

KEM

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Nowadays manipulation and depositing of high-level radioactive waste has become the most important issue, which needs to be solved. High-level radioactive waste consists mainly of spent fuel elements from nuclear power plants, which cannot be deposited for long time in surface repositories in the same way as it is possible in case of low and medium level radioactive waste. The most effective and safe solution in longer time horizon seems to be deep geological repository of high level waste. In this process of deposition, large amount of specific conditions needs to be taken into account while designing the whole underground complex, because the materials and structures must fulfil all necessary requirements. Then adequate safety will be ensured.

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Section: Discussionmentioning

confidence: 99%

The Issue of Underground Depositing of High Radioactive Waste

Kočová

Říhová

Zatloukal

2016

KEM

Self Cite

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“…However, exposing specimens to a temperature of 600 °C, few hair lines cracks were observed for control mixes as well as dolerite concrete. This is because chemically bound water tends to evaporate, which triggers chemical reactions and, in turn, leads to physical changes such as cracks (Koťátková et al, 2016). The control mixes suffered more than dolerite mixes against thermal stresses.…”

Section: Physical Observationsmentioning

confidence: 99%

Development of high-temperature heavy density dolerite concrete for 4th generation nuclear power plants

Khan

Malik²,

Yaqub³

et al. 2023

Front. Mater.

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This study examines the physical, mechanical, microstructural, and attenuation properties of high-density concrete exposed to temperatures ranging from 200°C to 1200°C. For this purpose, heavy-density concrete containing 25%, 50%, 75%, and 100% dolerite aggregates was developed and compared with three ordinary concrete mixes. Pre- and post-heated concrete specimens were evaluated for mass and density loss, compressive strength, rebound hammer, X-ray and gamma-ray attenuation, Half Value Layer (HVL), and Ten Value Layer (TVL) along with microstructural properties determined by scanning electron microscopy and Energy Dispersive X-ray. The results showed that the incorporation of 75% dolerite aggregate during pre- and post-heating yielded high compressive strength whereas low mass and density loss. The same mixture showed significant improvement in gamma ray shielding at all temperatures. The Half Value Layer and Ten Value Layer values showed a reduction in the thickness of concrete as a shield. It is recommended that dolerite heavy-density concrete is a potential radiation shield at high temperatures ranging from 200°C–1200°C in fourth-generation nuclear power plants.

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“…The explosive spalling might occur in all concrete, while HSC is belived to be more susceptible to spalling than NSC because of its low permeability and low water to cement ratio [2]. Decrease of mechanical properties of ordinary concrete is connected with gradual increase of temperature, which is connected with decomposition of hydration products of Portland cement (decomposition of hydraulic bond) [3]. The refractory concrete is based on hydraulic bond (aluminous cement), which is created by hydration of aluminous cement, which is able to resist the action of elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Fracture Characteristics of Refractory Concrete after the Action of Various Temperature Loading

Holčapek

2018

KEM

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This article deals with the experimental investigation of residual mechanical properties of refractory composite after the action of various thermal loading. Specimens with dimension 40 × 40 × 160 mm were produced from composite containing basalt fibres and aggregate, aluminous cement and metakaolin. Different group of specimens were exposed to various temperatures 105 °C, 200 °C, 300 °C, 400 °C, 500 °C and 600 °C for three hours. Different temperature caused various changes in chemical composition of concrete that can result into decrease of mechanical properties. Bulk density, flexural strength, compressive strength, fracture energy and dynamic modulus of elasticity were investigated after each type of thermal loading. After the action of 600 °C all investigated residual properties achieved lowest values. Based on performed experiments we can conclude that the main decrease of mechanical properties take place after the action of 400 °C.

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The Effect of Elevated Temperatures and Nuclear Radiation on the Properties of Biological Shielding Concrete

Cited by 7 publications

References 12 publications

The Issue of Underground Depositing of High Radioactive Waste

The Issue of Underground Depositing of High Radioactive Waste

Development of high-temperature heavy density dolerite concrete for 4th generation nuclear power plants

Mechanical and Fracture Characteristics of Refractory Concrete after the Action of Various Temperature Loading

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