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APPLICATION OF THE DIFFERENTIAL PEAK ABSORPTION METHOD AS AN AUXILIARY TOOL IN ENRICHMENT MEASUREMENTS OF UF_6 CYLINDERS FOR SAFEGUARDS PURPOSES

机译：微分吸收法作为辅助工具在专用UF_6气瓶富集测量中的应用。

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The ABACC (Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials) uses the system MMCG (Mini Multi-Channel analyzer and hyper-pure Germanium detector) with the software MGAU in enrichment meter mode for the determination of enrichment of UF_6 cylinders during safeguards inspections. One of the important conditions that must be met for this measurement to be acceptable is the infinite- thickness of UF_6 in the position where the detector is located during measurement. This is called the Infinite-Thickness Condition (ITC). If this condition is not met, the results obtained by the inspector in the field will be incorrect. With the goal of helping the inspector in this procedure, ABACC is developing a software tool to analyze the spectra achieved, and to determine if the ITC is met. The method under development is based on the Differential Peak Absorption (DPA) technique, in which the relation of count rates measured for different gamma rays photopeaks coming from the same isotope depends on the thickness of the materials present between the isotope and the detector. Applying this technique, the relation between count rates at the photopeaks of ~235U in a spectrum obtained from an UF_6 cylinder can be compared with the expected value for the ITC. This article presents the theoretical study of the proposed method, and the laboratory tests performed in order to determine the relation between count rates for the photopeaks of ~235U in the ITC. The results produced with calibrated laboratory samples and the experiences reached in the field are presented, showing the efficiency of the proposed method as a tool to improve the quality of measurements in safeguards inspections.

机译：ABACC（巴西-阿根廷核材料核算和控制局）使用系统MMCG（微型多通道分析仪和超纯锗探测器）和MGAU软件在浓缩仪模式下确定保障期间UF_6气瓶的浓缩检查。要使该测量可接受，必须满足的重要条件之一是在测量过程中检测器所处位置的UF_6的无限厚度。这称为无限厚度条件（ITC）。如果不满足此条件，检查员在现场获得的结果将是不正确的。为了帮助检查员进行此程序，ABACC正在开发一种软件工具来分析所获得的光谱，并确定是否满足ITC。正在开发的方法基于差分峰吸收（DPA）技术，其中针对来自同一同位素的不同伽马射线光峰测量的计数率之间的关系取决于存在于同位素和检测器之间的材料的厚度。应用此技术，可以将从UF_6圆柱体获得的光谱中〜235U的光峰值处的计数率之间的关系与ITC的预期值进行比较。本文介绍了该方法的理论研究，并进行了实验室测试，以确定ITC中〜235U光电峰的计数率之间的关系。介绍了用校准的实验室样品产生的结果以及在现场获得的经验，表明了该方法作为提高保障检查中的测量质量的工具的效率。

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《INMM annual meeting》|2008年|p.1-8|共8页
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Erwin Galdoz; Osvaldo Cristallini; José A. Perrotta; Max Fachinetti; Luis A. Rovere;
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中图分类放射性废物管理及综合利用;
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1. ~(235)U enrichment or UF_6 mass determination on UF_6 cylinders with non-destructive analysis methods [J] . R. Bemdt, E. Franke, P. Mortreau Nuclear instruments and methods in physics research . 2010,第2期

机译：用无损分析方法测定UF_6气瓶中的〜（235）U富集或UF_6质量
2. Applications of HPGe-detected high energy gamma rays toward quantifying neutron emission rates and ~(234)U enrichment in UF_6 cylinders [J] . Allison T. Greaney, Susan K. Smith, Ramkumar Venkataraman, Nuclear Instruments & Methods in Physics Research. B, Beam Interactions with Materials and Atoms . 2020,第Auga21期

机译：HPGE检测到的高能伽马射线朝向量子排放率的应用〜（234）UF_6气缸中的富集
3. Enhanced Techniques and Improved Results In ~(235)U Enrichment Measurement of Large UF_6 Cylinders by Portable Germanium Spectrometer [J] . J. B. Montgomery Journal of Nuclear Materials Management . 2006,第2期

机译：便携式锗光谱仪测量大型UF_6气瓶〜（235）U的增强技术和改进结果
4. APPLICATION OF THE DIFFERENTIAL PEAK ABSORPTION METHOD AS AN AUXILIARY TOOL IN ENRICHMENT MEASUREMENTS OF UF_6 CYLINDERS FOR SAFEGUARDS PURPOSES [C] . Institute of Nuclear Materials Management annual meeting . 2008

机译：差分峰值吸收法在UF_6气缸富集测量中的辅助工具，用于保障的目的
5. New methodologies in the design of a general purpose fuzzy expert system: Applications with AI based precipitation retrieval designed for satellite microwave measurements [D] . Oh, Kyung Whan 1988

机译：通用模糊专家系统设计中的新方法：基于AI的降水检索的应用设计用于卫星微波测量
6. OFF-PEAK ABSORPTION MEASUREMENTS IN FEULGEN CYTOPHOTOMETRY [O] . Sally B. Fand, Richard P. Spencer 1964

机译：佛手根细胞分光光度法的峰外吸收测量
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APPLICATION OF THE DIFFERENTIAL PEAK ABSORPTION METHOD AS AN AUXILIARY TOOL IN ENRICHMENT MEASUREMENTS OF UF_6 CYLINDERS FOR SAFEGUARDS PURPOSES

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