Neutronics experiment on a helium cooled pebble bed (HCPB) breeder blanket mock-up
Neutronics experiment on a helium cooled pebble bed (HCPB) breeder blanket mock-up
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DOI：
10.1016/j.fusengdes.2007.04.009
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发表时间：
2007-10-01
影响因子：
1.7
通讯作者：
Zappa, G.
中科院分区：
文献类型：
--
作者：
Batistoni, P.;Angelone, M.;Zappa, G.
在欧洲聚变技术计划的框架下，在欧盟测试毯模块（TBM）、HCPB概念的模型上进行了中子学实验，目的是验证核数据预测核反应的能力，例如具有合格的不确定性的氚生产率（TPR）。在实验中，使用位于不同深度的 Li2CO3 颗粒在每个深度的两个对称位置（一个位于上部，一个位于下部增殖盒）测量了 TPR。 ENEA、TUD/VKTA 和 JAEA 进行了三项独立测量。铍层中的中子通量也使用活化箔进行测量。将 TBM 中测得的氚产生量 (E) 与通过 MCNP-4C 代码使用非常详细的实验装置模型计算出的相同量 (C) 进行比较。还进行了灵敏度和不确定性分析，以评估由于中子截面的不确定性而导致的计算不确定性。使用蒙特卡罗和确定性代码进行的此类分析的结果表明，横截面引起的不确定性达到 4-5% (2 sigma)。获得的 C/E 比率的 C/E 比较的总不确定性为 9-10% (2 sigma)。 C/E 比较表明，氚产量的计算平均被低估了约 10%，并且在测量和计算的组合 2 sigma 不确定度范围内。所得结果表明设计
A neutronics experiment has been performed in the frame of European Fusion Technology Program on a mock-up of the EU Test Blanket Module (TBM), HCPB concept, with the objective to validate the capability of nuclear data to predict nuclear responses, such as the tritium production rate (TPR), with qualified uncertainties. In the experiment, the TPR has been measured using Li2CO3 pellets located at various depths at two symmetrical positions at each depth, one in the upper and one in the lower breeder cassette. Three independent measurements were performed by ENEA, TUD/VKTA and JAEA. The neutron flux in the beryllium layer was measured as well using activation foils.The measured tritium production in the TBM (E) was compared with the same quantity (C) calculated by the MCNP-4C code using a very detailed model of the experimental set up. A sensitivity and uncertainty analysis has also been performed to evaluate the calculation uncertainty due to the uncertainty on neutron cross sections. The results of such analysis, carried out using both Monte Carlo and deterministic codes, shows that the uncertainty due to cross sections amounts to 4-5% (2 sigma). C/E ratios were obtained with a total uncertainty on the C/E comparison of 9-10% (2 sigma). The C/E comparison shows that the calculation of the tritium production is underestimated by about 10% in average and is within the combined 2 sigma uncertainty margin of the measurements and the calculations. The obtained results indicate that design