Investigation of Radiation Damage in Trombay Nuclear Waste Glasses by ESR and Photoluminescence Techniques

Mohapatra, M.; Mishra, R.; Kaushik, C.P.; Tomar, B. S.

doi:10.1016/j.mspro.2014.10.032

Cited by 10 publications

(18 citation statements)

References 15 publications

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“…The irradiation attenuation rate of NJ2 glass is the lowest, almost insensitive to 5M Gy radiation dose between 300 nm and 550 nm. In general, such Fe and Ce oxides with redox behavior contribute to radiation resistance 38−43 . All the irradiated glasses here show a small reduction in the band intensity near 1050 nm (cf.…”

Section: Discussionmentioning

confidence: 81%

Glass resistance to radiation–part I: Preliminary investigation of three commercial glass fibers

Song

Zeng

et al. 2020

Int J of Appl Glass Sci

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The effects of γ-radiation on properties of three types of commercial alkaline earth aluminosilicate glasses (NJE, NJ1, NJ2) were investigated at 5M Gy dosage, using samples of bulk glass, glass fiber, and fiber reinforced laminate epoxy composite. The radiation-induced defect generation and structural modifications in the bulk glasses were characterized by UV-VIS-NIR, FTIR absorption spectroscopy, respectively.Strong radiation resistance was found in NJ2 composed of high content of glass former such as Si and Al, together with variable Fe and Ce oxide. Mechanical properties of the fiber woven fabric taps and reinforced laminate composites were investigated before and after the irradiation. While the tap samples showed minor property degradations after the irradiation, all composite samples degraded by greater than 19% in tensile strength and greater than 55% in interlaminate shear strength (ILSS) at 5M Gy dose level. Deterioration of the composite mechanical properties is primarily attributed to the radiation damage to the epoxy resin and in turn, the failure mode of the irradiated composite samples is dominated by delamination at the interfaces between the fiber glass tapes and the resin under the applied tensile load or shear as compared with the failure mode of fiber breakages for their counterparts without γ-irradiation. K E Y W O R D Sglass fiber, glass reinforced plastic composites, glass structure, mechanical property, γ-radiation

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Section: Discussionmentioning

confidence: 81%

Glass resistance to radiation–part I: Preliminary investigation of three commercial glass fibers

Song

Zeng

et al. 2020

Int J of Appl Glass Sci

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“…Electrons can be trapped by multivalent cations such as transition metals and lanthanides which are present in HLW glasses and thus they may change their oxidation state [30,[59][60][61][62][63][64][65][66]. A few studies in the literature have reported that the radiation-induced defects due to electronic interactions can be healed or mitigated, due to the presence of multivalent cations in HLW glass via defect hopping [29,60,63,67,68]. Furthermore, studying radiation-induced paramagnetic defects in simulated HLW glasses may be challenging since there are few techniques which can be utilised to identify the radiation-induced paramagnetic defects.…”

Section: Overviewmentioning

confidence: 99%

“…In a recent study by Peuget et al, [55] demonstrated that due to alpha self-irradiation (simulated in this study using 244 Cm doping and external irradiation using gold ions) ISG glass water alteration at high-reaction progress is impacted by glass structural damage. Some of the common radiationinduced electronic defects or paramagnetic defect centres formed in glasses upon irradiation in the literature [18,25,26,[30][31][32][33][34]57,60,61,68,165,[168][169][170][171][172][173][174], their definition and structure are presented as follows:…”

Section: Structural Defects In Borosilicate Glasses Due To Irradiationmentioning

confidence: 99%

“…There is an EPR resonance signal present in irradiated glass samples, centred at around the free electron value of g~2.00. This signal in both NaBaBSi and LiNaBSi glasses is a four shoulder/peak (quartet structure), which is due to the convolution of radiation-induced paramagnetic centres and can be attributed due to boron oxygen hole centres (BOHCs) [57,68,174,247]. Radiation induced breaking of B-O-B bonds is responsible for creation of BOHCs.…”

Section: Glass Colorationmentioning

confidence: 99%

“…Radiation induced breaking of B-O-B bonds is responsible for creation of BOHCs. In a borosilicate glass a BOHC can be defined as a hole trapped at the non-bridging oxygen (NBO) atom in trigonal boron (=B-O•) units [56,68,248,249]. An EPR signal centred around a magnetic field of ~348 mT with experimental value of g~1.974 ± 0.002 and 1.972 ± 0.002 at 0.5 and 5 MGy, respectively, can be attributed to the Eor polaron centre [27,176,179].…”

Section: Glass Colorationmentioning

confidence: 99%

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Radiation damage effects on the structure and properties of radioactive waste glasses

Rautiyal¹

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The performance assessment of glass matrices currently being used in different nuclear energy producing countries to contain and immobilise high-level waste (HLW) waste is crucial for safe and economic disposal. During the first ~500 years of geological disposal fission products will me the main source or radiation and they decay by beta-gamma emission. We studied different borosilicate glasses used in different countries to immobilise HLW, such as Indian glass (NaBaBSi), UK glasses (LiNaBSi), also called MW- Mixture Windscale, UK-CaZn a modified version of MW, French glass (SON68) and a glass proposed by six collaborating nations, called the International Simple Glass (ISG), to see whether / how irradiation defects are dependent on glass composition. Glasses were externally irradiated using a 60Co gamma source to study the effects of beta-gamma radiation (a gamma emitter loses it energy to atomic electrons they then further interact via coulombic interactions); and by He2+ ion implantation to study the effects of alpha particles. A multi-spectroscopic approach was used to characterise glass specimens before and after irradiation. NaBaBSi and LiNaBSi glasses were irradiated using 60Co gamma photons and we found boron-oxygen hole centres (BOHC), electrons trapped at alkali cations or ET centres and peroxy-radicals (PORs) as common defect in these glasses. In addition, E- or polaron centres which may be related to formation of elemental / metallic sodium colloids formed in NaBaBSi glass. Time-dependent thermal annealing of the irradiated glasses revealed that POR’s are the most thermally stable of the defect centres. BOHC and ET centres were common to SON68, ISG and CaZn glasses. In NaBaBSi, LiNaBSi and SON68 glasses loaded with non-active simulated HLW no sharp and intense signals indicative of radiation-induced paramagnetic defect centres was observed. In the study of NaBaBSi and LiNaBSi glasses doped with 0.19. 0.99, and 4.76 mol% Fe2O3 prepared in an oxidising melting environment, electron paramagnetic resonance (EPR) spectroscopy showed that gamma irradiation induced sharp and intense signals exist for only the 0 and 0.19 mol% Fe2O3 doped samples and disappeared for samples containing higher molar concentrations of Fe2O3. It is postulated that, upon gamma irradiation, in LiNaBSi glass Fe2+ is oxidised to Fe3+ by the capture of holes, whereas in NaBaBSi glass Fe3+ is reduced to Fe2+ due to capture of electrons. Further research is needed to understand the reasons behind these different behaviours.

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Investigation of structural, ultrasonic, and radiation shielding properties of PbO-B2O3 glasses reinforced MnO2

Hussein,

Barakat,

Abd Elwahab

2024

Journal of Alloys and Compounds

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Investigation of Radiation Damage in Trombay Nuclear Waste Glasses by ESR and Photoluminescence Techniques

Cited by 10 publications

References 15 publications

Glass resistance to radiation–part I: Preliminary investigation of three commercial glass fibers

Glass resistance to radiation–part I: Preliminary investigation of three commercial glass fibers

Radiation damage effects on the structure and properties of radioactive waste glasses

Investigation of structural, ultrasonic, and radiation shielding properties of PbO-B2O3 glasses reinforced MnO2

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