Hydrolysis of trivalent plutonium and solubility of Pu(OH)3(am) under electrolytic reducing conditions

2016 ◽  
Vol 45 (48) ◽  
pp. 19449-19457 ◽  
Author(s):  
Hye-Ryun Cho ◽  
Young-Sang Youn ◽  
Euo Chang Jung ◽  
Wansik Cha
Keyword(s):  
Radioactive Waste ◽  
Waste Disposal ◽  
Safety Assessment ◽  
Radioactive Waste Disposal ◽  
Reducing Conditions ◽  
System P ◽  
High Level ◽  
Hydrolysis Of

This paper focusses on the determination of the thermodynamic data of Pu(iii) hydrolysis, which are important for a long-term safety assessment of high-level radioactive waste disposal in a deep geological system.

CSAMT exploration at Sellafield: Characterization of a potential radioactive waste disposal site

Geophysics ◽  
2000 ◽  
Vol 65 (4) ◽  
pp. 1070-1079 ◽  
Author(s):  
Martyn J. Unsworth ◽  
Xinyou Lu ◽  
M. Don Watts
Keyword(s):  
Radioactive Waste ◽  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
Disposal Site ◽  
Waste Disposal Site ◽  
Controlled Source ◽  
High Level ◽  
Cultural Noise ◽  
And Inversion

The long term disposal of radioactive waste in an underground repository requires the detailed geological evaluation of a potential site. Owing to their inherent sensitivity to the presence of fluids in rocks, electromagnetic (EM) methods have an important role in this assessment. Controlled‐source EM techniques are especially useful in strong anthropogenic noise environments such as industrial locations. However the complexity of modeling and inversion can limit the quantitative interpretation of controlled‐source EM data. A potential radioactive waste disposal site at Sellafield in Great Britain has been investigated using a variety of EM exploration techniques. Controlled‐source audio‐frequency magnetotelluric (CSAMT) data have given the best subsurface information in an environment that has a high level of cultural noise. One‐dimensional inversions of the Sellafield CSAMT data were found to be inadequate; 2.5-D forward modeling and inversion were used to interpret the data. The resulting resistivity models show good agreement with well log data collected at the site. These resistivity models show the presence of a large zone of hypersaline groundwater extending 1 km inland towards the potential repository and indicate the effect of faults on the hydrogeology.

Radioactive Waste Disposal, an International Legal Perspective

1990 ◽  
Vol 3 (2) ◽  
pp. 143-166 ◽  
Author(s):  
Leigh Hancher
Keyword(s):  
Radioactive Waste ◽  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
Advantages And Disadvantages ◽  
Long Term Storage ◽  
Legal Perspective ◽  
Pros And Cons ◽  
High Level ◽  
Term Storage

The article deals with the advantages and disadvantages of an international solution for the safe, permanent disposal or long-term storage of high level radioactive waste from a legal perspective. Firstly, some early attempts to create an International Waste Repository (IWR) and their subsequent fate are examined. Next to this, pros and cons of an IWR in the context of recent national and international developments in the management of, and trade in radioactive waste, are considered. Main related question is, whether an international solution to waste disposal is a useful option. Finally, the legal and institutional problems which must be considered if states decide to create an international facility for waste disposal are described. Special attention is given to a model provided for in Chapter V of the Euratom Treaty of 1957.

Degradation of phosphatic waste forms incorporating long-lived radioactive isotopes

2001 ◽  
Vol 65 (5) ◽  
pp. 589-601 ◽  
Author(s):  
D. Read ◽  
C. T. Williams
Keyword(s):  
Radioactive Waste ◽  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
Radioactive Isotopes ◽  
Long Term Stability ◽  
Waste Forms ◽  
Trivalent Actinides ◽  
High Level ◽  
Hlw Repository

AbstractThis paper provides a brief perspective on synthetic, phosphate-based waste forms for high level radioactive waste (HLW). Evidence in support of their long-term stability is then discussed by reference to the degradation of natural monazites with emphasis on the fate of released uranium, thorium and the rare earths (REE). It is apparent that the REE can be mobilized and fractionated at temperatures anticipated in a HLW repository (∼200°C). This provides an indication of the likely fate of the trivalent actinides (Am(III), Cm(III)) if incorporated in similar matrices. Thorium, though released on alteration of monazite, tends to re-concentrate locally in secondary, microcrystalline phases. In relative terms, U is readily removed from monazites. Although it can be re-concentrated in alteration products, the potential exists for substantial loss of U to groundwater. The findings of this research have important implications for the performance of radioactive waste disposal systems where there is a clear need for improved chemical data to describe the precipitation-dissolution of phosphate phases. It is concluded that monazite-like ceramics designed for the containment of HLW will retain tetravalent actinides but may release uranium in response to natural degradative processes.

scholarly journals EXPERIMENTAL STUDY ON MANUFACTURE OF BLOCK-TYPE BUFFER FOR HIGH-LEVEL RADIOACTIVE WASTE DISPOSAL

2003 ◽  
pp. 203-208
Author(s):  
Hideo KOMINE ◽  
Nobuhide OGATA ◽  
Akira NAKASHIMA ◽  
Hajime TAKAO ◽  
Hiroyoshi UEDA ◽  
...  
Keyword(s):  
Experimental Study ◽  
Radioactive Waste ◽  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
Block Type ◽  
High Level Radioactive Waste ◽  
High Level
Sign in / Sign up

Export Citation Format

Share Document