Understanding of the mechanical and structural changes induced by alpha particles and heavy ions in the French simulated nuclear waste glass

Karakurt, Gökhan; Abdelouas, Abdesselam; Guin, Jean‐Pierre; Nivard, Mariette; Sauvage, Thierry; Paris, Michaël; Bardeau, Jean‐François

doi:10.1016/j.jnucmat.2016.04.022

Cited by 43 publications

(50 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These differences are certainly explained by the role of alpha particles involved in the alpha decay events as recently suggested by Mir on silica and sodium borosilicate glasses, [41][42][43] and Karakurt and Charpentier on ISG glass. 6,8 In particular, by using sequential irradiation with Au and He ions, Mir demonstrated that the alpha particles induced a partial healing of the damage previously generated by Au ions. Therefore, in an alpha decay event, associating both recoil nuclei and alpha particles, the final damaged state of the material is certainly the combination of the damage generated by the recoil nuclei and the partial healing induced by the alpha particles.…”

Section: Simulation Of Alpha Decay Self-irradiation By Heavy Ions Irrmentioning

confidence: 99%

“…2 This glass is also a simplified version, i.e. composed of six oxides, of the French R7T7 nuclear glass and was already partially studied with respect to radiation effects [3][4][5][6][7][8] and leaching behavior. [9][10][11][12][13][14][15][16][17][18] The characterization of the irradiated glassy state of ISG glass is of significant importance for the scientific community working in this international initiative about nuclear glass long-term behavior by offering a description of the glassy state after several thousand years of storage time, i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Radiations effects in ISG glass: from structural changes to long-term aqueous behavior

et al. 2018

View full text Add to dashboard Cite

The aim of the studies about the stability of nuclear glasses is to predict as accurately as possible their behavior over geological timescale. It requires the development of experimental methods to accelerate their irradiation and leaching ageing. This study focuses on the International Simple Glass behavior under irradiation by evaluating its structural and macroscopic property evolutions, and also its long-term chemical durability. Two irradiation ageing scenarios are considered: an alpha self-irradiation of a 244 Cm-doped-ISG glass and an external irradiation with few MeV gold ions of non-radioactive ISG glass coupons. The results obtained from the Raman spectroscopy, density, and hardness measurements led to the conclusion that ballistic effects from the recoil nuclei are responsible of the changes with dose observed under alpha self-irradiation and that the ISG glass is a good surrogate of the French nuclear SON68 complex glass under such irradiation conditions. The assessment of the structural evolution with dose of this glass reinforces the mechanistic concepts about the glass response under alpha self-irradiation damage, where the glass response to a recoil nucleus event is the result of a very fast quenching of the damaged zone in the displacement cascade. Furthermore, the irradiation damage induced by gold ions does not fully mimic the 244 Cm-doped glass evolution with nuclear dose, since the results of this simulation method overestimates the amplitude of the irradiation damage in the glass because the effects of the alpha particle are not included. Finally, this study demonstrates that the ISG glass water alteration at high-reaction progress is impacted by the glass damage, which indicates that the long-term glass chemical durability will depend on the glass structure when water arrives in contact.

show abstract

Section: Simulation Of Alpha Decay Self-irradiation By Heavy Ions Irrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Radiations effects in ISG glass: from structural changes to long-term aqueous behavior

et al. 2018

View full text Add to dashboard Cite

show abstract

“…1 International Simple Glass (ISG) is a simplified model composition for a collaborative study of dissolution/corrosion mechanism of highlevel waste (HLW) glasses. [2][3][4] ISG has been intensively researched recently with studies focusing on its dissolution behavior under different conditions, 3,[5][6][7][8][9][10][11][12] its surface quality, 13 radiation effect, [14][15][16][17][18] waste loading, 19 mechanical property, 20,21 and especially on the properties of its alteration layers using diverse techniques such as electron microprobe analysis, 22 Doppler broadening positron annihilation spectroscopy, 23 and atom probe tomography. 24 However, due to the lack of long-range periodicity, the structural study of glass materials exhibits many challenges.…”

Section: Introductionmentioning

confidence: 99%

Structural role of ZrO2 and its impact on properties of boroaluminosilicate nuclear waste glasses

Deng

Kerisit

et al. 2018

npj Mater Degrad

View full text Add to dashboard Cite

Addition of zirconia (ZrO 2 ) to nuclear waste glasses, even in small amount, significantly affects physical properties such as chemical durability, density, viscosity, and glass transition temperature. Hence ZrO 2 plays an important role in the development of nuclear waste glass compositions. It was found recently that addition of zirconia decreases the initial dissolution rate but increases longterm dissolution by changing the protective properties such as porosity of alteration layers. In this study, the International Simple Glass (ISG) with different amounts of ZrO 2 /SiO 2 substitution was simulated using classical molecular dynamics (MD) simulations and recently developed composition-dependent potential sets. Local structural descriptors such as bond distances, bond angle distributions, and coordination numbers were systematically studied and compared with experimental values. Zr K-edge extended X-ray absorption fine structure spectra were also calculated and compared with experiment to resolve the local coordination environment around Zr. Medium-range structural information (e.g., Q n distribution, network connectivity, and ring-size distribution) showed that ZrO 2 /SiO 2 substitution increases the overall network connectivity and the amount of smaller sized rings, which will decrease the initial dissolution rate by strengthening the glass network and limiting water diffusivity. Finally, diffusion and dynamic properties of the ions were studied and discussed to develop a better understanding of the chemical durability of these glasses.

show abstract

“…To date a variety of glass compositions have been studied by ion beam irradiation, mainly the French SON68 glass as well as a variety of simple glasses. Irradiation has tended to utilize helium ions to investigate the effect of alpha decay although gold, 27,28 xenon, 29 bismuth 30 and lead 24 have also been used in studies where the formation of molecular oxygen has been observed or postulated. The energy and fluence of the ion beam is important in determining how the ion beam interacts with the glass.…”

Section: Radiation Effects On Gas Bubble Formationmentioning

confidence: 99%

“…Most recently, 28 both SON68 glass and the International Simple Glass (ISG) were irradiated with both 1 MeV He + and 7 MeV Au 5+ at room temp (water cooled). Raman spectra revealed molecular oxygen in the gold irradiated glass along with structural modifications that seem to indicate depolymerisation.…”

Section: Other Studiesmentioning

confidence: 99%

Bubble formation in nuclear glasses: A review

Leay

Harrison

2019

J. Mater. Res.

View full text Add to dashboard Cite

show abstract

Understanding of the mechanical and structural changes induced by alpha particles and heavy ions in the French simulated nuclear waste glass

Cited by 43 publications

References 57 publications

Radiations effects in ISG glass: from structural changes to long-term aqueous behavior

Radiations effects in ISG glass: from structural changes to long-term aqueous behavior

Structural role of ZrO2 and its impact on properties of boroaluminosilicate nuclear waste glasses

Bubble formation in nuclear glasses: A review

Contact Info

Product

Resources

About