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首页> 外文会议>Annual meeting of the Institute of Nuclear Materials Management >ALTERNATIVES TO HELIUM-3 FOR NEUTRON MULTIPLICITY DETECTORS
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ALTERNATIVES TO HELIUM-3 FOR NEUTRON MULTIPLICITY DETECTORS

机译：中子多重检测器的氦3替代品

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Collaboration between the Pacific Northwest National Laboratory (PNNL) and the Los Alamos National Laboratory (LANL) is underway to evaluate neutron detection technologies that might replace the high-pressure helium (~3He) tubes currently used in neutron multiplicity counter for safeguards applications. The current stockpile of ~3He is diminishing and alternatives are needed for a variety of neutron detection applications including multiplicity counters. The first phase of this investigation uses a series of Monte Carlo calculations to simulate the performance of an existing neutron multiplicity counter configuration by replacing the ~3He tubes in a model for that counter with candidate alternative technologies. These alternative technologies are initially placed in approximately the same configuration as the ~3He tubes to establish a reference level of performance against the ~3He-based system. After these reference-level results are established, the configurations of the alternative models will be further modified for performance optimization. The ~3He model for these simulations is the one used by LANL to develop and benchmark the Epithermal Neutron Multiplicity Counter (ENMC) detector, as documented by H.O. Menlove, et al. in the 2004 LANL report LA-14088. The alternative technologies being evaluated are the boron-tri-fluoride-filled proportional tubes, boron-lined tubes, and lithium coated materials previously tested as possible replacements in portal monitor screening applications, as documented by R.T. Kouzes, et al. in the 2010 PNNL report PNNL-72544 and NIM A 623 (2010) 1035-1045. The models and methods used for these comparative calculations will be described and preliminary results shown.
机译：太平洋西北国家实验室（PNNL）和洛斯阿拉莫斯国家实验室（LANL）之间正在进行合作，以评估中子探测技术，该技术可能取代目前用于中子多重计数器的高压氦（〜3He）管，用于保障应用。当前〜3He的储备正在减少，并且各种中子检测应用（包括多重性计数器）都需要替代品。该研究的第一阶段使用一系列的蒙特卡洛计算，通过用候选替代技术替换该计数器模型中的〜3He管，来模拟现有中子多重计数器配置的性能。最初将这些替代技术放置在与〜3He管大致相同的配置中，以建立基于〜3He的系统的参考性能水平。在建立了这些参考级结果之后，将进一步修改替代模型的配置以优化性能。 H.O证明，用于这些模拟的〜3He模型是LANL用于开发和比较超热中子多重计数器（ENMC）检测器的模型。 Menlove等。在2004年的LANL报告LA-14088中。被评估的替代技术是填充三氟化硼的比例管，衬有硼的管以及涂有锂的材料，这些材料先前经过测试可以作为门禁监控器筛查应用中的替代品，如R.T. Kouzes等。在2010年PNNL报告PNNL-72544和NIM A 623（2010）1035-1045中。将描述用于这些比较计算的模型和方法，并显示初步结果。

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