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首页> 外文会议>International conference on the physics of reactors;PHYSOR 2010 >EVALUATION OF GAMMA SCANNING IN OSKARSHAMN2 WITH SIMULATE-5
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EVALUATION OF GAMMA SCANNING IN OSKARSHAMN2 WITH SIMULATE-5

机译：用模拟5评价OSKARSHAMN 2中的伽马扫描

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SIMULATE-5, Studsvik Scandpower's next generation nodal code, has been benchmarked against recent gamma scan measurements of Oskarshamn2, an ABB/Westinghouse design BWR, and results are presented in this paper. Gamma scan measurements following the Cycle-32 operation includes 48 assembly gamma scans of advanced Optima2 and Atrium-10B fuels. Two Optima2 fuel assemblies were disassembled for more detailed gamma scanning of 49 fuel rods. SIMULATE-5 is a three dimensional multi-group analytical nodal code with microscopic depletion capability. Its state of the art neutronic modules have been developed based on first principals with considerations of today's highly heterogeneous cores. SIMULATE-5 has a built in capability of tracking Ba 140 isotopics in a node as well as fuel pin level which makes the evaluations of gamma scans straightforward. The assembly gamma scan comparisons reveal that SIMULATE-5 accurately predicts the nodal Ba 140 densities, hence nodal/assembly powers, regardless of fuel assembly type, burnup or location of the fuel assembly in the core. Heterogeneities in the axial direction, due to enrichment/burnable absorber zoning, part length fuel and spacer/grids are handled well. Pin gamma scan evaluations show that SIMULATE-5 offers significant improvements in accuracy to calculate pin powers vs. existing methods, especially for the fuel assemblies with control rod which exhibits strong radial power/flux gradients. The last part of this paper summarizes the benchmark results for core tracking calculations for the last 18 cycles of Oskarshamn2.
机译：Studsvik Scandpower的下一代节点代码SIMULATE-5已针对ABB / Westinghouse设计的BWR Oskarshamn2的最新伽马扫描测量结果进行了基准测试，结果在本文中进行了介绍。在Cycle-32操作后进行的伽马扫描测量包括对高级Optima2和Atrium-10B燃料进行的48次组装伽马扫描。拆卸了两个Optima2燃料组件，以便对49个燃料棒进行更详细的伽马扫描。 SIMULATE-5是具有微观耗尽功能的三维多组分析节点代码。考虑到当今高度异构的铁心，其最先进的中子学模块是基于第一原理而开发的。 SIMULATE-5具有跟踪节点中Ba 140同位素以及燃料销水平的内置功能，这使对伽马扫描的评估变得简单明了。组件伽马扫描比较显示SIMULATE-5可以准确预测节点Ba 140的密度，因此可以预测节点/组件的功率，而与燃料组件的类型，燃耗或燃料组件在堆芯中的位置无关。由于富集/可燃吸收器分区，轴向上的异质性得到了很好的处理。销钉伽马扫描评估表明，与现有方法相比，SIMULATE-5在计算销钉功率方面的准确性有了显着提高，尤其是对于带有控制杆的燃油组件，该组件显示出很强的径向功率/通量梯度。本文的最后一部分总结了Oskarshamn2的最后18个周期的核心跟踪计算的基准结果。

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