Irradiation of a thorium–plutonium rodlet: Experiment and benchmark calculations |
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| Affiliation: | 1. Thor Energy, Sommerrogaten 13-15, Oslo 0255, Norway;2. Chalmers University of Technology, Göteborg, Sweden;3. Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany;4. Forschungszentrum Jülich GmbH, Jülich, Germany;5. Karlsruhe Institute of Technology, Karlsruhe, Germany;1. State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China;2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;3. National Defense Key Discipline Lab of Nuclear Waste and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, China;1. ICSM, UMR 5257 CNRS/CEA/Univ. Montpellier/ENSCM, Site de Marcoule, Bât. 426, BP 17171, 30207 Bagnols/Cèze, France;2. CEA, Nuclear Energy Division, RadioChemistry & Processes Department, BP 17171, 30207 Bagnols/Cèze, France;3. CEA, Nuclear Energy Division, DTEC Department, BP 17171, 30207 Bagnols/Cèze, France;1. Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K-7B4, Canada;2. Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA;3. Energy and Global Security Directorate, Argonne National Laboratory, Argonne, IL 60439, USA;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. College of Resources and Enviromental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;3. State Key laboratory of Geological Process and Mineral Resources, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | A benchmark exercise for thorium–plutonium fuel, based on experimental data, has been carried out. A thorium–plutonium oxide fuel rodlet was irradiated in a PWR for four consecutive cycles, to a burnup of about 37 MWd/kgHM. During the irradiation, the rodlet was inserted into a guide tube of a standard MOX fuel assembly. After the irradiation, the rod was subjected to several PIE measurements, including radiochemical analysis. Element concentrations and radial distributions in the rodlet, multiplication factors and distributions within the carrier assembly of burnup and power were calculated. Four participants in the study simulated the irradiation of the MOX fuel assemblies including the thorium–plutonium rodlet using their respective code systems; MCBurn, HELIOS, CASMO-5 and ECCO/ERANOS combined with TRAIN. The results of the simulations and the measured results of the radiochemical analysis were compared and found to be in fairly good agreement when the calculated results were calibrated to give the same burnup of the thorium–plutonium rodlet as that experimentally measured. Average concentrations of several minor actinides and fission products were well reproduced by all codes, to the extent that can be expected based on known uncertainties in the experimental setup and the cross section libraries. Calculated results which could not be confirmed by experimental measurement were compared and only two significant anomalies were found, which can probably be addressed by limited modifications of the codes. |
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| Keywords: | Thorium Plutonium Benchmark Experiment Simulation LWR |
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