Monitoring long-term evolution of engineered barrier systems using magnets: Magnetic response

Rigonat, N.; Isnard, O.; Harley, Simon L.; Butler, Ian B.

doi:10.1016/j.jhazmat.2017.06.064

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…Within the multi-barrier system designed for the deep geological disposal of HLW, the metal container located near the buffer/backfill material serves as the initial barrier, isolating HLW from the biosphere. Its operational lifespan symbolizes the entire journey from geological disposal to the corrosion damage of HLW [ 7 , 8 , 9 , 10 ]. However, during the long-term waste treatment process, the HLW disposal tank may fail due to corrosion caused by groundwater infiltration into the storage.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Co2+, Ni2+, Sr2+, Cs+, and I− by Corrosion Products α-FeOOH from Typical Metal Tanks

Du,

Li,

Yuan

et al. 2024

Materials

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Throughout the nuclear power production process, the disposal of radioactive waste has consistently raised concerns about environmental safety. When the metal tanks used for waste disposal are corroded, radionuclides seep into the groundwater environment and eventually into the biosphere, causing significant damage to the environment. Hence, investigating the adsorption behavior of radionuclides on the corrosion products of metal tanks used for waste disposal is an essential component of safety and evaluation protocols at disposal sites. In order to understand the adsorption behavior of important radionuclides 60Co, 59Ni, 90Sr, 135Cs and 129I on α-FeOOH, the influences of different pH values, contact time, temperature and ion concentration on the adsorption rate were studied. The adsorption mechanism was also discussed. It was revealed that the adsorption of key nuclides onto α-FeOOH is significantly influenced by both pH and temperature. This change in surface charge corresponds to alterations in the morphology of nuclide ions within the system, subsequently impacting the adsorption efficiency. Sodium ions (Na+) and chlorate ions (ClO3−) compete for coordination with nuclide ions, thereby exerting an additional influence on the adsorption process. The XPS analysis results demonstrate the formation of an internal coordination bond (Ni–O bond) between Ni2+ and iron oxide, which is adsorbed onto α-FeOOH.

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Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Co2+, Ni2+, Sr2+, Cs+, and I− by Corrosion Products α-FeOOH from Typical Metal Tanks

Du,

Li,

Yuan

et al. 2024

Materials

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“…As a key artificial barrier, the durability of metal disposal container is the first factor to ensure the structure stability of repository. In some countries, such as China, Japan and France, carbon steel has been selected as a candidate material of metal disposal container by virtue of its industrial experiences, anti-irradiation, high strength and fine processing performance [4][5][6][7][8][9][10][11][12][13]. However, carbon steel has a fast corrosion rate in some aggressive environments, which makes it difficult to satisfy the long-term life requirements of disposal container.…”

Section: Introductionmentioning

confidence: 99%

Effects of Aerobic and Anoxic Conditions on the Corrosion Behavior of NiCu Low Alloy Steel in the Simulated Groundwater Solutions

Wei

Sun

Dong

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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The present work focused on investigating the corrosion behavior of NiCu low alloy steel in 0.05 M NaHCO 3 solutions with different Cl − concentrations under the aerobic-anoxic condition. The results showed that NiCu steel tended to be pseudopassivated in the solutions of 0.05 M NaHCO 3 and 0.05 M NaHCO 3 + 0.01 M NaCl exposed to air. The cathodic process transformed from oxygen reduction to the common reduction of oxygen and α-FeOOH, while the anodic process was the iron dissolution. As Cl − increased to 0.1 M, the steel tended to be activity dissolution. Due to the blocking effect of rust layer on the oxygen, the cathodic process transformed to the reduction of α-FeOOH. After the solutions were deoxidized, the cathodic process was controlled by only rust reduction. Meanwhile, both the cathodic process and anodic process of NiCu steel corrosion were significantly inhibited. During the whole aerobic-anoxic immersion, the corrosion rate of NiCu steel increased with Cl − concentration. It was not only related to the promotion of Cl − on the anodic dissolution of steel, but also related to the cathodic reduction of more α-FeOOH generated, which could accelerate the cathodic process.

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“…Nowadays, many countries are considering the deep geological disposal as the ultimate strategy of high-level radioactive wastes (HLWs) by using an engineered barrier system (EBS) composed of the solidified glass, metal container and buffer/ backfill layer from inside to outside [1][2][3][4]. For the metal container, NiCu low alloy steel has been selected as a promising candidate material, because it not only has the excellent anti-irradiation, high strength and welding performance as low carbon steel, but also has a lower corrosion rate than low carbon steel in the simulated groundwater environments [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of Deteriorated Bentonite Sediments on the Corrosion Behavior of NiCu Low Alloy Steel

Wei

Dong

Sun

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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The corrosion evolution of steel disposal container largely depends on the evolution of surrounding bentonite environment in the long-term geological disposal of high-level radioactive wastes. This study focused on the influence of the deteriorated bentonite sediments on the corrosion behavior of NiCu low alloy steel in the top supernatant and bottom slurry formed by Gaomiaozi bentonite and 0.05 M NaHCO 3 + 0.1 M NaCl + 0.1 M Na 2 SO 4 solution. In the top supernatant, the cathodic process of the steel corrosion was transformed from the reduction in oxygen to the reduction in ferric corrosion products with time as same as that in the blank solution. While in the bottom bentonite slurry, the cathodic process always maintained as the hydrogen evolution reaction due to the coverage of more bentonite sediments. Meanwhile, the corrosion rate of NiCu steel was obviously decreased. In addition, the localized corrosion tendency of the steel could also be reduced by the large amount of deteriorated bentonite sediments.

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Monitoring long-term evolution of engineered barrier systems using magnets: Magnetic response

Cited by 6 publications

References 34 publications

Adsorption Behavior of Co2+, Ni2+, Sr2+, Cs+, and I− by Corrosion Products α-FeOOH from Typical Metal Tanks

Adsorption Behavior of Co2+, Ni2+, Sr2+, Cs+, and I− by Corrosion Products α-FeOOH from Typical Metal Tanks

Effects of Aerobic and Anoxic Conditions on the Corrosion Behavior of NiCu Low Alloy Steel in the Simulated Groundwater Solutions

Influence of Deteriorated Bentonite Sediments on the Corrosion Behavior of NiCu Low Alloy Steel

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