Enhanced diffusion under alpha self-irradiation in spent nuclear fuel: Theoretical approaches
Various theoretical approaches have been developed in order to estimate the enhanced diffusion coefficient of fission products under alpha self-irradiation in spent nuclear fuel. These simplified models calculate the effects of alpha particles and recoil atoms on mobility of uranium atoms in UO 2. T...
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| Veröffentlicht in: | Journal of nuclear materials 2005-11, Vol.346 (1), p.48-55 |
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| creator | Ferry, Cécile Lovera, Patrick Poinssot, Christophe Garcia, Philippe |
| description | Various theoretical approaches have been developed in order to estimate the enhanced diffusion coefficient of fission products under alpha self-irradiation in spent nuclear fuel. These simplified models calculate the effects of alpha particles and recoil atoms on mobility of uranium atoms in UO
2. They lead to a diffusion coefficient which is proportional to the volume alpha activity with a proportionality factor of about 10
−44 (m
5). However, the same models applied for fission lead to a radiation-enhanced diffusion coefficient which is approximately two orders of magnitude lower than values reported in literature for U and Pu. Other models are based on an extrapolation of radiation-enhanced diffusion measured either in reactors or under heavy ion bombardment. These models lead to a proportionality factor between the alpha self-irradiation enhanced diffusion coefficient and the volume alpha activity of 2
×
10
−41 (m
5). |
| doi_str_mv | 10.1016/j.jnucmat.2005.04.072 |
| format | Article |
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2. They lead to a diffusion coefficient which is proportional to the volume alpha activity with a proportionality factor of about 10
−44 (m
5). However, the same models applied for fission lead to a radiation-enhanced diffusion coefficient which is approximately two orders of magnitude lower than values reported in literature for U and Pu. Other models are based on an extrapolation of radiation-enhanced diffusion measured either in reactors or under heavy ion bombardment. These models lead to a proportionality factor between the alpha self-irradiation enhanced diffusion coefficient and the volume alpha activity of 2
×
10
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2. They lead to a diffusion coefficient which is proportional to the volume alpha activity with a proportionality factor of about 10
−44 (m
5). However, the same models applied for fission lead to a radiation-enhanced diffusion coefficient which is approximately two orders of magnitude lower than values reported in literature for U and Pu. Other models are based on an extrapolation of radiation-enhanced diffusion measured either in reactors or under heavy ion bombardment. These models lead to a proportionality factor between the alpha self-irradiation enhanced diffusion coefficient and the volume alpha activity of 2
×
10
−41 (m
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−44 (m
5). However, the same models applied for fission lead to a radiation-enhanced diffusion coefficient which is approximately two orders of magnitude lower than values reported in literature for U and Pu. Other models are based on an extrapolation of radiation-enhanced diffusion measured either in reactors or under heavy ion bombardment. These models lead to a proportionality factor between the alpha self-irradiation enhanced diffusion coefficient and the volume alpha activity of 2
×
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| ispartof | Journal of nuclear materials, 2005-11, Vol.346 (1), p.48-55 |
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| subjects | Applied sciences Energy Exact sciences and technology Fuels Nuclear fuels Preparation and processing of nuclear fuels |
| title | Enhanced diffusion under alpha self-irradiation in spent nuclear fuel: Theoretical approaches |
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