The Mini-Plate 2 (MP-2) irradiation test is a fueled experiment designed for irradiation in multiple test locations in the Advanced Test Reactor (ATR). MP-2 is considered a non-instrumented drop-in test where small aluminum-clad fuel plate samples are cooled directly by the ATR Primary Coolant System (PCS) water. The MP-2 fuel plate experiment will be irradiated in several different irradiation locations of the ATR. This fueled experiment contains aluminum-clad fuel mini plates consisting of monolithic U-Mo. Four different types of fuel plates were analyzed. A thermal analysis has been performed on the MP-2 experiment to be irradiated in the ATR at Idaho National Laboratory (INL). A new technique for calculating Departure from Nucleate Boiling Ratio (DNBR) and Flow Instability Ratio (FIR) using the commercial finite element and heat transfer code ABAQUS is demonstrated. This new technique calculates DNBR for the fuel plate surfaces and FIR for all water components for each finite element surface and node. Pressure drop data is fed into the calculations in order to geometrically calculate the water saturation temperature.Results from the DNBR and FIR calculations are displayed with the ABAQUS post processor named Viewer. By calculating these parameters at each location in the finite element model, conservatism is replaced with accuracy. This allows for a greater margin for the thermal hydraulic safety parameters.
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机译：Mini-Plate 2（MP-2）辐照测试是一种加油实验，旨在在Advanced Test Reactor（ATR）的多个测试位置进行辐照。 MP-2被认为是一种非仪表式的直接插入式测试，其中的小块铝箔燃料板样品直接通过ATR主冷却剂系统（PCS）的水进行冷却。 MP-2燃料板实验将在ATR的几个不同照射位置进行照射。这个加燃料的实验包含由整体式U-Mo组成的覆铝燃料微型板。分析了四种不同类型的燃料板。在爱达荷州国家实验室（INL）的ATR中对MP-2实验进行了热分析。演示了使用商业有限元和传热代码ABAQUS计算核沸腾比（DNBR）和流动不稳定性比（FIR）的新技术。这项新技术为每个有限元表面和节点计算了燃料板表面的DNBR和所有水成分的FIR。将压降数据输入到计算中，以便以几何方式计算水的饱和温度。DNBR和FIR计算的结果将与名为Viewer的ABAQUS后处理器一起显示。通过在有限元模型中的每个位置计算这些参数，保守性将被精度取代。这为热液压安全参数提供了更大的余量。
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