Importance of the Alkaline Degradation of Cellulose in Performance Assessment of a Cementitious Radioactive Waste Repository

1997 ◽  
Vol 506 ◽  
Author(s):  
M.A. Glaus ◽  
A. Laube ◽  
S. Stallone ◽  
L.R. Van Loon
Keyword(s):  
Radioactive Waste ◽  
Performance Assessment ◽  
Degradation Products ◽  
Cellulose Degradation ◽  
Realistic Model ◽  
The Other ◽  
Alkaline Degradation ◽  
Model Case ◽  
Waste Repository ◽  
Present Poster

It is the aim of the present poster to show two approaches for assessing the influence of the alkaline degradation of cellulose on the sorption of tri- and tetravalent radionuclides. The two approaches differ in their degree of conservativity, one is a conservative, the other a realistic model case. The result of both examinations is expressed in terms of sorption reduction factors, valid for a situation where cellulose degradation products are influencing the sorption of radionuclides on cement.

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.

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.

Sign in / Sign up

Export Citation Format

Share Document