Effect of Chemical Corrosion on the Mechanical Characteristics of Parent Rocks for Nuclear Waste Storage

Han, Tielin; Shi, Junping; Chen, Yunsheng; Li, Zhihui

doi:10.1155/2016/7853787

Cited by 14 publications

(5 citation statements)

References 28 publications

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“…Deng et al [25] conducted recurrent F-Tcycle experiments under the condition of H 2 SO 4 , NaOH, and NaCl solutions and pure water to investigate the coupled effect of F-T cycles and chemical solution on sandstone, and the result showed that NaOH causes stronger damage to rock samples used in these experiments than other solutions. By subjecting granite, parent rocks for nuclear waste storage, to strong acid solutions and strong alkaline solutions, Han et al [26] explored the deterioration and mechanical properties of granite under various chemistry environments and found that strong acid solutions may aggravate chemical damage deterioration in granite while strong alkaline solutions have braking effect on chemical damage deterioration in granite. Miao et al [27] used distilled water and NaCl solutions as chemistry solution to investigate granite's damage effects, aging features, and mechanisms after subjecting to solutions with different pH and flow rates.…”

Section: Introductionmentioning

confidence: 99%

Damage Characteristics of Sandstone Subjected to Coupled Effect of Freezing‐Thawing Cycles and Acid Environment

Deng

2018

Advances in Civil Engineering

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In order to figure out the damage characteristics and mechanisms of sandstone under coupled effect of acid erosion and recurrent freezing-thawing cycles, sulfuric acid is chosen as acid solution, and sandstone, representative stone in Sichuan province, is chosen as a sample to conduct the freezing-thawing cycling test. In the meantime, chemical component of the solution is also tested and recorded in the progress of freezing-thawing cycling. Then, the nuclear magnetic resonance (NMR) test and magnetic resonance images (MRI) test on samples are conducted with the help of the AniMR-150 NMR imaging system. After a series of tests, the sample’s appearance, dry mass, porosity, T2 spectrum, solution’s pH, solution’s metallic ion concentration, and magnetic resonance images are obtained and analyzed. The results show that dry mass loss and porosity grow with F-T cycles increase and pH value decrease. Montmorillonite, illite, and clay in sandstone react with sulfuric acid solution; as a consequence, K+, Mg2+, Fe3+, and Al3+ separate out, and the solution’s pH and concentration of K+, Mg2+, Fe3+, and Al3+ increase with F-T cycles. Acid erosion and F-T cycling lead to the generation of new micropores and expansion of micropores at the beginning; when the acid solution is exhausted, new micropores generate under the effect of freezing-thawing cycling, and micropores in samples keep developing and expanding with the increase of freezing-thawing cycles. Coupled effect of acid corrosion and recurrent freezing-thawing cycling causes much more serious deterioration to sandstone samples than acid corrosion.

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Section: Introductionmentioning

confidence: 99%

Damage Characteristics of Sandstone Subjected to Coupled Effect of Freezing‐Thawing Cycles and Acid Environment

Deng

2018

Advances in Civil Engineering

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“…Deep geological disposal with an engineered-barrier system (EBS) is one of the options to treat spent nuclear fuel. It aims to isolate the spent fuel from human society by sealing it in a corrosion-resistant canister and embedding permanently in the deep underground bedrock [1][2][3]. Determining the corrosion rates of canister materials exposed to a geological repository environment is an important step toward evaluating the service life of canisters in an EBS.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Early Corrosion Behavior of Canister Candidate Materials in Oxic Groundwater by the EQCM Method

Kim

Jang

et al. 2022

Science and Technology of Nuclear Installations

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This study investigated the corrosion mass changes of canister candidate materials (Cu, Ni, Ti, SS304) in an oxic groundwater solution using the electrochemical quartz crystal microbalance method in order to estimate corrosion thickness. The materials were immersed in naturally aerated groundwater with and without the addition of chloride ions to observe the mass changes as well as the open-circuit potential (corrosion potential). In the oxic groundwater solution, Ni, Ti, and SS304 exhibited negligible mass changes, indicating their insusceptibility to general corrosion. In contrast, the Cu electrode exhibited a relatively significant mass change (63.8 ng/cm2 for 60 h), and the maximum corrosion thickness was estimated to be approximately 0.1 μm/yr. In the presence of chloride ions, the Ni and Ti electrodes did not reveal demonstrate any significant changes, whereas the SS304 electrode was slightly increased compared to an absence of chloride ions. A lower mass change occurred when the Cu electrode was immersed in the chloride-containing groundwater solution compared with the absence of chlorides because the dissolution of Cu as CuCl 2 − was involved in Cu2O formation.

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“…Yin et al [19][20][21] conducted some experimental investigation on the silt on the upstream side dam. Chen [22][23][24] calculated the lateral active earth pressure by taking unit weight of silt as a constant value.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Pressure Distribution Law and Calculation Method of Muddy Water with High Silt Content

Zhong

Liu

Wang³

et al. 2022

Geofluids

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The pressure distribution law of muddy water with high silt content has great influence on the stress and strain calculation of the dam body. Currently, there is a few research studies referring to the calculation method of high silt content muddy water pressure, which leads to no reliable theoretical basis for muddy water pressure calculation in dam design. In this paper, muddy water with high silt content was prepared and the imitation tests and model tests were carried out to investigate the pressure distribution law. Based on the test result analysis, it is indicated that the muddy water with high silt content is also in a flowable and viscous state, which is consistent with the law of fluid behavior; the horizontal pressure is equal to the vertical pressure at the same position, and this relationship is generally time independent; through the test result analysis, a pressure formula for muddy water with high silt content is proposed; through comparison between the pressure formula-calculated results and monitoring data, it is indicated that the proposed pressure formula is applicable in the calculation of muddy water pressure. The formula can be a useful tool in the dam safety and design calculation.

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Effect of Chemical Corrosion on the Mechanical Characteristics of Parent Rocks for Nuclear Waste Storage

Cited by 14 publications

References 28 publications

Damage Characteristics of Sandstone Subjected to Coupled Effect of Freezing‐Thawing Cycles and Acid Environment

Damage Characteristics of Sandstone Subjected to Coupled Effect of Freezing‐Thawing Cycles and Acid Environment

Investigation of Early Corrosion Behavior of Canister Candidate Materials in Oxic Groundwater by the EQCM Method

Experimental Investigation on the Pressure Distribution Law and Calculation Method of Muddy Water with High Silt Content

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