On the radiolysis of iodide, nitrate and nitrite ions in aqueous solution: An experimental and modelling study

Cripps, R.; Jäckel, B.; Güntay, S.

doi:10.1016/j.nucengdes.2011.06.031

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…Traditionally, modeling the long-term radiolysis of aqueous systems has been performed using a deterministic treatment of the bulk homogeneous chemistry. − A deterministic approach to modeling radiation chemistry involves the description of the radiolytic chemical kinetics as a set of coupled simultaneous differential equations, and it requires the radiolytic yields of the primary radiolysis species as input parameters. These yields are used to calculate the homogeneous rate of production of the primary radiation chemical species.…”

Section: Introductionmentioning

confidence: 99%

“…These yields are used to calculate the homogeneous rate of production of the primary radiation chemical species. For aqueous solutions, the yields used are conventionally taken to be those of the species escaping from a radiation track in pure water and so depend on radiation quality, i.e., radiation type and energy, but not on the composition of the irradiated system. , …”

Section: Introductionmentioning

confidence: 99%

“…For aqueous solutions, the yields used are conventionally taken to be those of the species escaping from a radiation track in pure water and so depend on radiation quality, i.e., radiation type and energy, but not on the composition of the irradiated system. 2,3 The passage of ionizing radiation through water results in the formation of a radiation chemical track, which is composed of a series of energy transfer events. Each energy transfer event results in the formation of a cluster of electronically excited or ionized reactive species, known as a spur.…”

Section: ■ Introductionmentioning

confidence: 99%

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Multi-Scale Modeling of the Gamma Radiolysis of Nitrate Solutions

et al. 2016

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A multiscale modeling approach has been developed for the extended time scale long-term radiolysis of aqueous systems. The approach uses a combination of stochastic track structure and track chemistry as well as deterministic homogeneous chemistry techniques and involves four key stages: radiation track structure simulation, the subsequent physicochemical processes, nonhomogeneous diffusion-reaction kinetic evolution, and homogeneous bulk chemistry modeling. The first three components model the physical and chemical evolution of an isolated radiation chemical track and provide radiolysis yields, within the extremely low dose isolated track paradigm, as the input parameters for a bulk deterministic chemistry model. This approach to radiation chemical modeling has been tested by comparison with the experimentally observed yield of nitrite from the gamma radiolysis of sodium nitrate solutions. This is a complex radiation chemical system which is strongly dependent on secondary reaction processes. The concentration of nitrite is not just dependent upon the evolution of radiation track chemistry and the scavenging of the hydrated electron and its precursors but also on the subsequent reactions of the products of these scavenging reactions with other water radiolysis products. Without the inclusion of intratrack chemistry, the deterministic component of the multiscale model is unable to correctly predict experimental data, highlighting the importance of intratrack radiation chemistry in the chemical evolution of the irradiated system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Multi-Scale Modeling of the Gamma Radiolysis of Nitrate Solutions

et al. 2016

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Significance of Phébus-FP results for plant safety in Switzerland

Birchley

Güntay

2013

Annals of Nuclear Energy

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Abatement of xenon and iodine emissions from medical isotope production facilities

Doll¹,

Sørensen²,

Bowyer³

et al. 2014

Journal of Environmental Radioactivity

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The capability of the International Monitoring System (IMS) to detect xenon from underground nuclear explosions is dependent on the radioactive xenon background. Adding to the background, medical isotope production (MIP) by fission releases several important xenon isotopes including xenon-133 and iodine-133 that decays to xenon-133. The amount of xenon released from these facilities may be equivalent to or exceed that released from an underground nuclear explosion. Thus the release of gaseous fission products within days of irradiation makes it difficult to distinguish MIP emissions from a nuclear explosion. In addition, recent shortages in molybdenum-99 have created interest and investment opportunities to design and build new MIP facilities in the United States and throughout the world. Due to the potential increase in the number of MIP facilities, a discussion of abatement technologies provides insight into how the problem of emission control from MIP facilities can be tackled. A review of practices is provided to delineate methods useful for abatement of medical isotopes.

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On the radiolysis of iodide, nitrate and nitrite ions in aqueous solution: An experimental and modelling study

Cited by 9 publications

References 13 publications

Multi-Scale Modeling of the Gamma Radiolysis of Nitrate Solutions

Multi-Scale Modeling of the Gamma Radiolysis of Nitrate Solutions

Significance of Phébus-FP results for plant safety in Switzerland

Abatement of xenon and iodine emissions from medical isotope production facilities

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