Subsurface Biogeochemistry of Actinides

doi:10.2172/1281679

GSTDTAP > 地球科学

DOI	10.2172/1281679
报告编号	LLNL-TR--696158
来源ID	OSTI ID: 1281679
	Subsurface Biogeochemistry of Actinides
	Kersting, Annie B.; Zavarin, Mavrik
	2016-06-29
出版年	2016
页数	34
语种	英语
国家	美国
领域	地球科学
英文摘要	A major scientific challenge in environmental sciences is to identify the dominant processes controlling actinide transport in the environment. It is estimated that currently, over 2200 metric tons of plutonium (Pu) have been deposited in the subsurface worldwide, a number that increases yearly with additional spent nuclear fuel (Ewing et al., 2010). Plutonium has been shown to migrate on the scale of kilometers, giving way to a critical concern that the fundamental biogeochemical processes that control its behavior in the subsurface are not well understood (Kersting et al., 1999; Novikov et al., 2006; Santschi et al., 2002). Neptunium (Np) is less prevalent in the environment; however, it is predicted to be a significant long-term dose contributor in high-level nuclear waste. Our focus on Np chemistry in this Science Plan is intended to help formulate a better understanding of Pu redox transformations in the environment and clarify the differences between the two long-lived actinides. The research approach of our Science Plan combines (1) Fundamental Mechanistic Studies that identify and quantify biogeochemical processes that control actinide behavior in solution and on solids, (2) Field Integration Studies that investigate the transport characteristics of Pu and test our conceptual understanding of actinide transport, and (3) Actinide Research Capabilities that allow us to achieve the objectives of this Scientific Focus Area (SFA and provide new opportunities for advancing actinide environmental chemistry. These three Research Thrusts form the basis of our SFA Science Program (Figure 1).
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/7389
专题	地球科学
推荐引用方式 GB/T 7714	Kersting, Annie B.,Zavarin, Mavrik. Subsurface Biogeochemistry of Actinides,2016.