Local and global trace plutonium contributions in fast breeder legacy soils.
Local and global trace plutonium contributions in fast breeder legacy soils.
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DOI：
10.1038/s41467-021-21575-9
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发表时间：
2021-03-19
影响因子：
16.6
通讯作者：
Joyce MJ
中科院分区：
文献类型：
--
作者：
Tighe C;Castrillejo M;Christl M;Degueldre C;Andrew J;Semple KT;Joyce MJ
环境中的微量钚往往包括当地和全球贡献，通常是人为来源。在这里，我们报告了当地和全球对一个前快中子增殖反应堆场地土壤中痕量钚的贡献的估计。测量到的240Pu/239Pu比率异常低，这与快中子增殖钚中预期的240Pu产率降低有关。钚浓度和同位素比率的异常表明对现场特定活动的法医洞察力，例如清理或结构变化。现场估计本地和全球239Pu贡献分别为（34±1）%和（66±3）%，质量浓度分别为（183±6）fg g - 1和（362±13）fg g - 1。后者与未受干扰和遥远地点的水平一致，（384±44）fg - 1，预计没有局部贡献。现场衍生材料的240Pu/239Pu比值估计为0.05±0.04。我们的研究证明了痕量钚测定的多方面潜力，可以为快增殖反应堆遗留的清理策略提供信息。本研究提出了一种方法来区分土壤中的局部钚污染与过去全球扩散产生的痕量钚，例如核武器爆炸和大气试验的沉降物。
Trace-level plutonium in the environment often comprises local and global contributions, and is usually anthropogenic in origin. Here, we report estimates of local and global contributions to trace-level plutonium in soil from a former, fast-breeder reactor site. The measured 240Pu/239Pu ratio is anomalously low, as per the reduced 240Pu yield expected in plutonium bred with fast neutrons. Anomalies in plutonium concentration and isotopic ratio suggest forensic insight into specific activities on site, such as clean-up or structural change. Local and global 239Pu contributions on-site are estimated at (34 ± 1)% and (66 ± 3)%, respectively, with mass concentrations of (183 ± 6) fg g−1 and (362 ± 13) fg g−1. The latter is consistent with levels at undisturbed and distant sites, (384 ± 44) fg g−1, where no local contribution is expected. The 240Pu/239Pu ratio for site-derived material is estimated at 0.05 ± 0.04. Our study demonstrates the multi-faceted potential of trace plutonium assay to inform clean-up strategies of fast breeder legacies. This study proposes a method to differentiate between local plutonium-based contamination in soils versus trace plutonium stemming from global dispersion in the past, such as fallout from detonation and atmospheric testing of nuclear weapons.
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影响因子：
2.3
作者：
Beasley, TM;Kelley, JM;Pozolotina, VN
通讯作者：
Pozolotina, VN
影响因子：
1.7
作者：
Chirayath, Sunil Sunny;Hollenbeck, Gordon;Nelson, Paul
通讯作者：
Nelson, Paul
DOI：
10.1007/s10967-019-06767-4
发表时间：
2019-12-01
影响因子：
1.6
作者：
Christl, Marcus;Guerin, Nicolas;Synal, Hans-Arno
通讯作者：
Synal, Hans-Arno
影响因子：
--
作者：
DIAMOND, H;FIELDS, PR;SPENCE, RW
通讯作者：
SPENCE, RW
DOI：
10.1016/0168-583x(96)00287-x
发表时间：
1996-09-01
影响因子：
1.3
作者：
Fifield, LK;Cresswell, RG;Priest, ND
通讯作者：
Priest, ND