Insights on fission products behaviour in nuclear severe accident conditions by X-ray absorption spectroscopy

E. Geiger; R. Bès; Ph Martin; Y. Pontillon; G. Ducros; P. L. Solari

doi:10.1016/j.jnucmat.2015.12.032

Insights on fission products behaviour in nuclear severe accident conditions by X-ray absorption spectroscopy

E. Geiger^*
, R. Bès
, Ph Martin
, Y. Pontillon
, G. Ducros
, P. L. Solari

^*Corresponding author for this work

Not published at Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

10 Citations (Scopus)

Abstract

Many research programs have been carried out aiming to understand the fission products behaviour during a Nuclear Severe Accident. Most of these programs used highly radioactive irradiated nuclear fuel, which requires complex instrumentation. Moreover, the radioactive character of samples hinders an accurate chemical characterisation. In order to overcome these difficulties, SIMFUEL stand out as an alternative to perform complementary tests. A sample made of UO₂ doped with 11 fission products was submitted to an annealing test up to 1973 K in reducing atmosphere. The sample was characterized before and after the annealing test using SEM-EDS and XAS at the MARS beam-line, SOLEIL Synchrotron. It was found that the overall behaviour of several fission products (such as Mo, Ba, Pd and Ru) was similar to that observed experimentally in irradiated fuels and consistent with thermodynamic estimations. The experimental approach presented in this work has allowed obtaining information on chemical phases evolution under nuclear severe accident conditions, that are yet difficult to obtain using irradiated nuclear fuel samples.

Original language	English
Pages (from-to)	25-33
Number of pages	9
Journal	Journal of Nuclear Materials
Volume	471
DOIs	https://doi.org/10.1016/j.jnucmat.2015.12.032
Publication status	Published - 1 Apr 2016
MoE publication type	A1 Journal article-refereed

Funding

Authors wish to thank EDF for supporting and funding this research project and the CEA Cadarache LAMIR, LCU, LEMCI and LLCC staff for their invaluable contribution. We acknowledge also SOLEIL for provision of synchrotron radiation facilities and we would like to thank Sandrine Schlutig and Hervé Hermange for assistance in using MARS beamline.

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10.1016/j.jnucmat.2015.12.032

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title = "Insights on fission products behaviour in nuclear severe accident conditions by X-ray absorption spectroscopy",

abstract = "Many research programs have been carried out aiming to understand the fission products behaviour during a Nuclear Severe Accident. Most of these programs used highly radioactive irradiated nuclear fuel, which requires complex instrumentation. Moreover, the radioactive character of samples hinders an accurate chemical characterisation. In order to overcome these difficulties, SIMFUEL stand out as an alternative to perform complementary tests. A sample made of UO2 doped with 11 fission products was submitted to an annealing test up to 1973 K in reducing atmosphere. The sample was characterized before and after the annealing test using SEM-EDS and XAS at the MARS beam-line, SOLEIL Synchrotron. It was found that the overall behaviour of several fission products (such as Mo, Ba, Pd and Ru) was similar to that observed experimentally in irradiated fuels and consistent with thermodynamic estimations. The experimental approach presented in this work has allowed obtaining information on chemical phases evolution under nuclear severe accident conditions, that are yet difficult to obtain using irradiated nuclear fuel samples.",

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AU - Bès, R.

AU - Martin, Ph

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AU - Solari, P. L.

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AB - Many research programs have been carried out aiming to understand the fission products behaviour during a Nuclear Severe Accident. Most of these programs used highly radioactive irradiated nuclear fuel, which requires complex instrumentation. Moreover, the radioactive character of samples hinders an accurate chemical characterisation. In order to overcome these difficulties, SIMFUEL stand out as an alternative to perform complementary tests. A sample made of UO2 doped with 11 fission products was submitted to an annealing test up to 1973 K in reducing atmosphere. The sample was characterized before and after the annealing test using SEM-EDS and XAS at the MARS beam-line, SOLEIL Synchrotron. It was found that the overall behaviour of several fission products (such as Mo, Ba, Pd and Ru) was similar to that observed experimentally in irradiated fuels and consistent with thermodynamic estimations. The experimental approach presented in this work has allowed obtaining information on chemical phases evolution under nuclear severe accident conditions, that are yet difficult to obtain using irradiated nuclear fuel samples.

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Insights on fission products behaviour in nuclear severe accident conditions by X-ray absorption spectroscopy

Abstract

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