The Sorption of Polonium, Actinium and Protactinium Onto Geological Materials

1999 ◽  
Vol 556 ◽  
Author(s):  
G. M. N. Baston ◽  
J. A. Berry ◽  
M. Brownsword ◽  
T. G. Heath ◽  
D. J. Ilett ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Performance Assessment ◽  
Room Temperature ◽  
Radioactive Waste Repository ◽  
Geological Materials ◽  
Reducing Conditions ◽  
Chemical Modelling ◽  
Waste Repository

AbstractThis paper describes a combined experimental and modelling programme of generic sorption studies to increase confidence in the performance assessment for a potential highlevel radioactive waste repository in Japan. The sorption of polonium, actinium and protactinium onto geological materials has been investigated. Sorption of these radioelements onto bentonite, tuff and granodiorite from equilibrated de-ionised water was studied under reducing conditions at room temperature. In addition, the sorption of actinium and protactinium was investigated at 60°C. Thermodynamic chemical modelling was carried out to aid interpretation of the results.

The Effect of Temperature on the Sorption of Technetium, Uranium, Neptunium and Curium on Bentonite, Tuff and Granodiorite

1996 ◽  
Vol 465 ◽  
Author(s):  
G M N Baston ◽  
J A Berry ◽  
M Brownsword ◽  
T G Heath ◽  
D J Blett ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Mathematical Modelling ◽  
Performance Assessment ◽  
Room Temperature ◽  
Effect Of Temperature ◽  
Geological Materials ◽  
Reducing Conditions ◽  
Geochemical Speciation ◽  
Waste Repository ◽  
High Level

ABSTRACTA study of the sorption of the radioelements: technetium; uranium; neptunium; and curium onto geological materials has been carried out as part of the PNC programme to increase confidence in the performance assessment for a high-level radioactive waste repository in Japan. Batch sorption experiments have been performed in order to study the sorption of the radioelements onto bentonite, tuff and granodiorite from equilibrated de-ionised water under strongly-reducing conditions at both room temperature and at 60°C.Mathematical modelling using the geochemical speciation program HARPHRQ in conjunction with the HATCHES database has been undertaken in order to interpret the experimental results.

Effect of Redox Conditions on the Sorption of Plutonium onto Geological Materials

2002 ◽  
Vol 713 ◽  
Author(s):  
J.A. Berry ◽  
M. Brownsword ◽  
D.J. Ilett ◽  
C.M. Linklater ◽  
C. Mason ◽  
...  
Keyword(s):  
Experimental Design ◽  
Radioactive Waste ◽  
Performance Assessment ◽  
Geochemical Modelling ◽  
Redox Conditions ◽  
Radioactive Waste Repository ◽  
High Level Radioactive Waste ◽  
Geological Materials ◽  
Waste Repository ◽  
High Level

ABSTRACTThis paper presents the latest results from a programme of generic sorption studies undertaken to increase confidence in data underpinning the performance assessment for a potential high-level radioactive waste repository in Japan. The sorption of plutonium onto basalt and sandstone was studied as a function of redox conditions that ranged from strongly reducing to oxidising. Geochemical modelling was used to aid experimental design and the interpretation of results.

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