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MODELLING OF THE H2020 INSPYRE FUEL CREEP EXPERIMENT

机译：H2020 Inspyre燃料蠕变实验的建模

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To better understand irradiation creep of nuclear fuel, NRG has prepared, as part of the H2020 European project INSPYRE, a separate effect irradiation experiment in the High Flux Reactor (HFR) in Petten (the Netherlands) aiming to measure fuel creep in-pile as a function of temperature, flux, burn-up and axial pressure load. This continuous type of measurement will supply a large data set, leading to more detailed knowledge on fuel behaviour during irradiation. To support the experiment and make optimal use of the generated data, a model is created of the experiment to better predict the behaviour of the fuel samples during irradiation. The current paper describes the numerical model, which couples the 1.5D fuel performance code TRANSURANUS (TV) with a Finite Element Analysis (FEA). The thermal analysis of the experiment is carried out using the FEA. Such approach enables to model a rather complex geometry of the experiment, and to include axial heat transport, which is not implemented in TU. TU is modified in order to use the fuel pellet temperatures obtained using the FEA and to include the axial load present in the experiment. The model is validated against several test cases and used to predict the fuel behaviour during a selection of foreseen irradiation scenario's. Results of the model will be used in the future for optimization of the irradiation parameters used in the experiment and for analysis of the data obtained during the irradiation.
机译：为了更好地了解核燃料的照射蠕变，作为H2020欧洲项目Inspryre的一部分，NRG在Petten（荷兰）中的一个单独的效果辐照实验，旨在测量燃料蠕变温度，助焊剂，燃烧和轴向压力负荷的函数。这种连续的测量类型将提供大量数据集，导致辐照期间有关燃料行为的更详细知识。为了支持实验并获得所生成的数据的最佳使用，将创建模型，以更好地预测照射期间燃料样品的行为。目前纸张描述了用有限元分析（FEA）将1.5D燃料绩效代码Transuranus（TV）耦合的数值模型。使用FEA进行实验的热分析。这种方法使得能够模拟实验的相当复杂的几何形状，并且包括轴向热传输，其在TU中不实现。修改抛光以使用使用FEA获得的燃料颗粒温度并包括实验中存在的轴向载荷。该模型针对几种测试用例验证，并用于预测选择预见的辐照方案期间的燃料行为。该模型的结果将在未来使用，以优化实验中使用的辐照参数，并用于分析照射期间获得的数据。

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