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Boron Coated Straws imaging panel capability for passive and active neutron measurements of radioactive waste drums
IEEE Transactions on Nuclear Science ( IF 1.9 ) Pub Date : 2020-09-01 , DOI: 10.1109/tns.2020.3010303
Cyrille Eleon , Florian Battiston , Maxime Bounaud , Mehdi Ben Mosbah , Christian Passard , Bertrand Perot

The evaluation of fissile mass inside radioactive waste drums is essential for radioactive waste management, nuclear safety, and criticality issues. However, passive and active neutron measurements can be strongly impacted by the uncertainty on the neutron source position within the drum and by matrix attenuation effects. Therefore, an imaging panel proposed by Proportional Technologies Inc., composed of seven Boron-coated straw (BCS) detectors has been tested to localize neutron interactions, in view to reduce uncertainties associated with plutonium or uranium position inside radioactive waste drums. A numerical model of the imaging panel has been developed and validated from a comparison with experimental profiles obtained with a 252Cf source. A passive measurement system equipped with 12 such imaging panels has been designed by numerical simulation, in view to provide information on neutron source location in a 118-L radioactive waste drum filled with organic, metallic, or mixed organic–metallic matrices. Additionally, an experimental setup dedicated to active measurements with a D-T neutron generator has been implemented to test the imaging panel. Prompt fission neutron signals have been recorded, which is induced by thermal interrogating neutrons in fissile material samples. This article presents 2-D images indicating the position of fissile materials. Consequently, BCS imaging panels open interesting prospects to reduce the uncertainty associated with plutonium or uranium localization both in passive and active neutron measurements.

中文翻译:

用于放射性废物桶被动和主动中子测量的硼涂层吸管成像面板功能

放射性废物桶内裂变质量的评估对于放射性废物管理、核安全和临界问题至关重要。然而,无源和有源中子测量会受到鼓内中子源位置的不确定性和矩阵衰减效应的强烈影响。因此,Proportional Technologies Inc. 提出的成像面板由七个涂硼稻草 (BCS) 探测器组成,已被测试以定位中子相互作用,以减少与放射性废物桶内钚或铀位置相关的不确定性。通过与使用 252Cf 源获得的实验曲线进行比较,已经开发并验证了成像面板的数值模型。通过数值模拟设计了配备 12 个此类成像面板的无源测量系统,以提供有关 118-L 放射性废物桶中中子源位置的信息,该桶充满有机、金属或混合有机金属基质。此外,还实施了专门用于使用 DT 中子发生器进行主动测量的实验装置,以测试成像面板。迅速的裂变中子信号已被记录下来,这是由裂变材料样品中的热询问中子引起的。本文展示了指示裂变材料位置的二维图像。因此,BCS 成像面板开辟了有趣的前景,以减少与被动和主动中子测量中钚或铀定位相关的不确定性。以提供关于装满有机、金属或混合有机金属基质的 118-L 放射性废物桶中中子源位置的信息。此外,还实施了专门用于使用 DT 中子发生器进行主动测量的实验装置,以测试成像面板。迅速的裂变中子信号已被记录下来,这是由裂变材料样品中的热询问中子引起的。本文展示了指示裂变材料位置的二维图像。因此,BCS 成像面板开辟了有趣的前景,以减少与被动和主动中子测量中钚或铀定位相关的不确定性。以提供关于装满有机、金属或混合有机金属基质的 118-L 放射性废物桶中中子源位置的信息。此外,还实施了专门用于使用 DT 中子发生器进行主动测量的实验装置,以测试成像面板。迅速的裂变中子信号已被记录下来,这是由裂变材料样品中的热询问中子引起的。本文展示了指示裂变材料位置的二维图像。因此,BCS 成像面板开辟了有趣的前景,以减少与被动和主动中子测量中钚或铀定位相关的不确定性。已经实施了专门用于使用 DT 中子发生器进行主动测量的实验装置来测试成像面板。迅速的裂变中子信号已被记录下来,这是由裂变材料样品中的热询问中子引起的。本文展示了指示裂变材料位置的二维图像。因此,BCS 成像面板开辟了有趣的前景,以减少与被动和主动中子测量中钚或铀定位相关的不确定性。已经实施了专门用于使用 DT 中子发生器进行主动测量的实验装置来测试成像面板。迅速的裂变中子信号已被记录下来,这是由裂变材料样品中的热询问中子引起的。本文展示了指示裂变材料位置的二维图像。因此,BCS 成像面板开辟了有趣的前景,以减少与被动和主动中子测量中钚或铀定位相关的不确定性。
更新日期:2020-09-01
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