CRUD deposition in accelerated high-temperature water: Investigation on the effect of substrate material and water chemistry

Cassineri, Stefano; Duff, Jonathan; Curioni, Michele; Banks, Andrew; Scenini, Fabio

doi:10.1016/j.jnucmat.2019.151915

Cited by 7 publications

(4 citation statements)

References 25 publications

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“…The flow cell test section was connected to a recirculating flow loop comprising a 13-litre autoclave and a 250-litre feed-tank, capable of delivering micro-filtered and ultra-high purity water (conductivity of 0.005 µS/cm) at a variable pressure (0.1-20.0 MPa) and variable temperature (from ambient temperature up to 633 K). The test water contained 2 ppm of Li in solution to inhibit the corrosion product deposition frequently occurring in flow restrictions with high-temperature water flow [23,41]. A high-pressure diaphragm pump was used to provide the driving head for the flow, and a pulsation damper was used to ensure pulsation-free flow conditions during all the experiments.…”

Section: Methodsmentioning

confidence: 99%

Experiments on Liquid Flow through Non-Circular Micro-Orifices

et al. 2020

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Microfluidics is an active research area in modern fluid mechanics, with several applications in science and engineering. Despite their importance in microfluidic systems, micro-orifices with non-circular cross-sections have not been extensively investigated. In this study, micro-orifice discharge with single-phase liquid flow was experimentally investigated for seven square and rectangular cross-section micro-orifices with a hydraulic diameter in the range of 326–510 µm. The discharge measurements were carried out in pressurized water (12 MPa) at ambient temperature (298 K) and high temperature (503 K). During the tests, the Reynolds number varied between 5883 and 212,030, significantly extending the range in which data are currently available in the literature on non-circular micro-orifices. The results indicate that the cross-sectional shape of the micro-orifice has little, if any, effect on the hydrodynamic behavior. Thus, existing methods for the prediction of turbulent flow behavior in circular micro-orifices can be used to predict the flow behavior in non-circular micro-orifices, provided that the flow geometry of the non-circular micro-orifice is described using a hydraulic diameter.

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Section: Methodsmentioning

confidence: 99%

Experiments on Liquid Flow through Non-Circular Micro-Orifices

et al. 2020

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“…12 m/S data. Another one can be related to the mass deposition from the corrosion products saturated SCW coolant flow (including the CRUD [12] phenomenon at the SCWCL transients). Thereupon it is worth noting that the observed irregularities of the Fig.…”

Section: Irradiation Assisted Corrosionmentioning

confidence: 99%

Computational Dosimetry and Post-Irradiation Studies Of the Electron Beam Irradiation Assisted Corrosion and Stress Corrosion Cracking of Statically Strained Steel Samples in a Supercritical Water Coolant

Bakai¹,

Boriskin²,

Bratchenko³

et al. 2022

Problems of Atomic Science and Technology

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New experimental data on the corrosion behavior of the 12X18H10T austenitic steel elastically strained cou-pons after 500 h long exposure in situ the NSC KIPT “Electron Irradiation Test Facility” supercritical water circula-tion loop are presented and discussed. The γ-activation analysis based computational dosimetry of samples is corre-lated to their weight gain/loss measurement data. The absorbed dose and stress effect on their irradiation assisted general corrosion is revealed. The corrosion surface/layer chemistry/microstructure are discussed with special em-phasis of the irradiation/stress impact on the protective coating stability, intergranular corrosion and precursors of cracking.

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“…The auxiliary circuit was mainly used to share the excess flow flux for the pressure drop at the inlet and outlet of the autoclave. A detailed description of experimental methods is given in reference [17]. The pH value at room temperature was set at 9.6~9.8 whilst the dissolved oxygen was <5 ppb, and the test was conducted at 290 • C for 500 h.…”

Section: Deposition Characterizationmentioning

confidence: 99%

“…Furthermore, the experimental parameters in previous studies deviate from actual working conditions to some extent due to safety concerns [15]. For instance, the temperature used by former researchers (230 • C) was slightly lower than the actual operating temperature (290 • C) of the secondary circuit, which is one of the important factors for ion dissolution and deposition [17,18]. The amount of ion concentration in the circuit directly affects clogging formation because the temperature affects the solubility of iron ions in the circuit, as well as the dissolution rate of the SG tube and TSP tube [19].…”

Section: Introductionmentioning

confidence: 98%

Microstructural Characterization of the Corrosion Product Deposit in the Flow-Accelerated Region in High-Temperature Water

Zhang

et al. 2022

Crystals

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The clogging behavior of the micro-orifice under a flow accelerated condition was investigated after 500 h of immersion in high-temperature water. The results indicated the residual area of the micro-orifice was reduced to one-third of its original size after 500 h of immersion due to the deposition of corrosion products. In this process, the clogging behavior of micro-orifice can be divided into three stages: the stable deposition stage, the quick recovery stage, and the dynamic equilibrium stage. The corrosion products were porous and consisted of many deposited particles. The process of particle deposition and removal was carried out simultaneously.

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CRUD deposition in accelerated high-temperature water: Investigation on the effect of substrate material and water chemistry

Cited by 7 publications

References 25 publications

Experiments on Liquid Flow through Non-Circular Micro-Orifices

Experiments on Liquid Flow through Non-Circular Micro-Orifices

Computational Dosimetry and Post-Irradiation Studies Of the Electron Beam Irradiation Assisted Corrosion and Stress Corrosion Cracking of Statically Strained Steel Samples in a Supercritical Water Coolant

Microstructural Characterization of the Corrosion Product Deposit in the Flow-Accelerated Region in High-Temperature Water

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