The effects of neutron and ionizing irradiation on the aqueous corrosion of SiC

Doyle, Peter J.; Sun, Kaichao; Snead, Lance Lewis; Katoh, Yutai; Bartels, David M.; Zinkle, Steven J.; Raiman, Stephen S.

doi:10.1016/j.jnucmat.2020.152190

Cited by 19 publications

(12 citation statements)

References 59 publications

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“…331-364). The stable oxidants (H 2 O 2 and O 2 ) create a corrosive environment contributing significantly to stress corrosion cracking of the structural materials [1,2,[4][5][6]. The harmful effect of oxidants is strengthened by the low acidity (low pH) of water at the operating temperatures.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Simulation of Radiation Chemistry for Controlling the Oxidising Environment in Water-Cooled Nuclear Power Reactors

Swiatla-Wojcik

2022

Applied Sciences

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Maintaining the integrity of materials of light-water nuclear power reactors requires the development of effective methods to control and minimise the corrosive environment associated with the radiolysis of a coolant. In this study, the behaviour of the oxidising environment is simulated using a hybrid method. The hybrid method has advantages in that the production of radiolytic species under exposure of the coolant to ionising radiation is simulated while providing material and charge balances. Steady-state concentrations of stable and transient oxidising agents are calculated as a function of radiation composition and dose rate by numerical integration of the system of kinetic equations describing radiation chemistry of neutral water, the alkaline solution, and the hydrogenated systems at 300 °C. The importance of the reactions and equilibria constituting the radiolysis scheme of the coolant is assessed. The influence of the presence of a base and the injected H2 on the yield of key reactions responsible for the formation of the main oxidants H2O2 and O2 are discussed. Simulation indicated the synergic effect of H2 gas and base added to the coolant on diminishment of the steady-state concentration of oxidants.

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Section: Introductionmentioning

confidence: 99%

A Numerical Simulation of Radiation Chemistry for Controlling the Oxidising Environment in Water-Cooled Nuclear Power Reactors

Swiatla-Wojcik

2022

Applied Sciences

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“…Increased wettability is well known to improve two phase heat transfer and hence it can be reasonably concluded that considering this effect of ionizing irradiation may become critical in determining CHF and thermal operation limits (a margin that might have been missed in calculations so far), considering the fact that gamma rays are emitted continuously in a nuclear reactor [4]. On the other hand, while the increased corrosion due to gamma irradiation is well-documented for Zircaloy and Steel based alloys in the nuclear community, its impact on advanced cladding materials such as SiC is of significant interest [12].…”

Section: Surface Morphology and Chemistry Studiesmentioning

confidence: 99%

Impact of Ionizing Irradiation on Surface Wettability: Fundamentals and Application in Engineering Superhydrophobic Surfaces

Seshadri¹,

Philips²,

Forrest³

et al. 2020

Transactions of the American Nuclear Society - Volume 123

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“…Since SiC has a lower hydrogen generation rate and lower heat of reaction than Zr, the amount of hydrogen generated from fuel claddings by reaction with steam during severe accidents is expected to significantly decrease when SiC fuel cladding is used instead of conventional Zircaloy fuel cladding [3,4]. Therefore, the expectation for increased accident tolerance by applying SiC fuel cladding has led to the development of manufacturing and integration technologies [5][6][7][8][9][10][11][12][13][14][15][16], research on material behavior under normal operation and accident conditions [5][6][7][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], and evaluation of safety and economic benefits [32].…”

Section: Introductionmentioning

confidence: 99%

“…Since the dissolved oxygen activity in water can greatly increase SiC recession, the amount of dissolved silica produced from SiC is likely to be larger in the coolant of a boiling water reactor (BWR) under the normal water chemistry (NWC) condition with a higher dissolved oxygen activity than in the coolant of a pressurized water reactor (PWR) [23][24][25][26][27]. Neutron irradiation increases hydrothermal corrosion rate [28]. The radiation effects on hydrothermal corrosion of SiC are thought to be due to the change of surface potential attributed from irradiation-induced defects [29], irradiation damage, and increase of oxidants generated by radiolysis [28].…”

Section: Introductionmentioning

confidence: 99%

“…Neutron irradiation increases hydrothermal corrosion rate [28]. The radiation effects on hydrothermal corrosion of SiC are thought to be due to the change of surface potential attributed from irradiation-induced defects [29], irradiation damage, and increase of oxidants generated by radiolysis [28]. Pre-damage on the SiC surface by irradiating with Si ions causes a pronounced increase of corrosion rate depending on the amount of dissolved oxygen in water [30].…”

Section: Introductionmentioning

confidence: 99%

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Radiation Effect in Ti-Cr Multilayer-Coated Silicon Carbide under Silicon Ion Irradiation up to 3 dpa

et al. 2022

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Replacement of conventional Zircaloy fuel cladding with silicon carbide (SiC) fuel cladding is expected to significantly decrease the amount of hydrogen generated from fuel claddings by the reaction with steam during severe accidents. One of their critical issues addressed regarding practical application has been hydrothermal corrosion. Thus, the corrosion resistant coating technology using a Ti-Cr multilayer was developed to suppress silica dissolution from SiC fuel cladding into reactor coolant under normal operation. The effect of radiation on adhesion of the coating to SiC substrate and its microstructure characteristics were investigated following Si ion irradiation at 573 K up to 3 dpa for SiC. Measurement of swelling in pure Ti, pure Cr and SiC revealed that the maximum inner stress attributed to the swelling difference was generated between the coating and SiC substrate by irradiation of 1 dpa. No delamination and cracking were observed in cross-sectional specimens of the coated SiC irradiated up to 3 dpa. According to analyses using transmission electron microscopy, large void formation and cascade mixing due to irradiation were not observed in the coating. The swelling in the coating at 573 K was presumed to be caused by another mechanism during radiation such as point defects rather than void formation.

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The effects of neutron and ionizing irradiation on the aqueous corrosion of SiC

Cited by 19 publications

References 59 publications

A Numerical Simulation of Radiation Chemistry for Controlling the Oxidising Environment in Water-Cooled Nuclear Power Reactors

A Numerical Simulation of Radiation Chemistry for Controlling the Oxidising Environment in Water-Cooled Nuclear Power Reactors

Impact of Ionizing Irradiation on Surface Wettability: Fundamentals and Application in Engineering Superhydrophobic Surfaces

Radiation Effect in Ti-Cr Multilayer-Coated Silicon Carbide under Silicon Ion Irradiation up to 3 dpa

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