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Examination of (α,n) Signatures as a Means of Plutonium Quantification in Electrochemical Reprocessing
Nuclear Science and Engineering ( IF 1.2 ) Pub Date : 2021-03-05 , DOI: 10.1080/00295639.2021.1883399
Stephen N. Gilliam 1 , Jamie B. Coble 1 , Steven E. Skutnik 1
Affiliation  

Abstract

In this paper, we investigate the possibility of plutonium quantification within the electrorefiner vessel of an electrochemical separation facility via the use of the (α,n) neutron signature from dissolved actinides. As a potential alternative means to traditional spontaneous fission tracking, such an analysis may provide a more reliable tracking capability of plutonium within systems that produce a mixed matrix sample that yields a large (α,n) source term relative to that of spontaneous fission. This assessment includes an evaluation and breakdown of nuclides within the refining unit to differentiate the source of neutrons and then the ratio between (α,n) emissions to total neutron emissions given a range of fuel parameters. Next, we provide an assessment of the origin of (α,n) neutrons in relation to multiple isotopes of plutonium to determine the potential of a direct tracking method. Preliminary results indicate that the (α,n) contribution for electrochemical systems is much higher than in its aqueous counterpart and rivals spontaneous fission yield in terms of magnitude. Furthermore, 238Pu is shown to be a main contributor to the (α,n) yield for the fuel examined in this study.



中文翻译:

检验 (α,n) 特征作为电化学后处理中钚量化的一种手段

摘要

在本文中,我们通过使用来自溶解的锕系元素的 (α,n) 中子特征研究了在电化学分离设施的电解精炼容器内进行钚量化的可能性。作为传统自发裂变跟踪的潜在替代手段,这种分析可以在产生混合基质样本的系统内提供更可靠的钚跟踪能力,该样本产生相对于自发裂变的大 (α,n) 源项。该评估包括对精炼装置内的核素进行评估和分解,以区分中子的来源,然后在给定一系列燃料参数的情况下确定 (α,n) 排放量与总中子排放量之间的比率。接下来,我们提供对 (α, n) 与多种钚同位素相关的中子,以确定直接跟踪方法的潜力。初步结果表明,电化学系统的 (α,n) 贡献远高于其水对应物,并且在数量上可与自发裂变产额相媲美。此外,238 Pu 被证明是本研究中检验的燃料的 (α,n) 产率的主要贡献者。

更新日期:2021-03-05
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