About this title ‐ Gas Generation and Migration in Deep Geological Radioactive Waste Repositories

2015 ◽  
Vol 415 (1) ◽  
pp. NP-NP ◽  
Keyword(s):  
Radioactive Waste ◽  
Gas Generation ◽  
Radioactive Waste Repositories ◽  
And Migration ◽  
Waste Repositories

Gas Generation and Migration from Radioactive Waste Repositories

1994 ◽  
Vol 353 ◽  
Author(s):  
P. J. Agg ◽  
P. J. Nash ◽  
W. R. Rodwell ◽  
T. R. Lineham
Keyword(s):  
Research Programme ◽  
Theoretical Models ◽  
Theoretical Modelling ◽  
Gas Generation ◽  
Model Predictions ◽  
Anaerobic Corrosion ◽  
Radioactive Waste Repositories ◽  
And Migration ◽  
Waste Repositories ◽  
Assessment Research

AbstractDuring the post-closure phase of a repository for low- and intermediate-level radioactive wastes significant quantities of gas will be generated, primarily by the anaerobic corrosion of metals and the degradation of organic wastes. A description is given of recent work carried out within the Nirex Safety Assessment Research Programme to address the generation of gas within a repository and the migration of gas from the repository to the biosphere. Theoretical modelling capabilities have been developed to address both of these issues. In order to gain confidence in such theoretical models, it is important to validate model predictions against observed experimental data. Preliminary experiments carried out to help validate the modelling approaches are described.

An Assessment of the Long-Term Durability of Concrete in Radioactive Waste Repositories

1985 ◽  
Vol 50 ◽  
Author(s):  
A. Atkinson ◽  
D. J. Goult ◽  
J. A. Hearne
Keyword(s):  
Reinforced Concrete ◽  
Radioactive Waste ◽  
Concrete Slab ◽  
Laboratory Studies ◽  
Preliminary Assessment ◽  
Reinforced Concrete Slab ◽  
Radioactive Waste Repositories ◽  
Waste Repositories ◽  
Durability Of Concrete

AbstractA preliminary assessment of the long-term durability of concrete in a repository sited in clay is presented. The assessment is based on recorded experience of concrete structures and both field and laboratory studies. It is also supported by results of the examination of a concrete sample which had been buried in clay for 43 years.The enoineering lifetime of a 1 m thick reinforced concrete slab, with one face in contact with clay, and the way in which pH in the repository as a whole is likely to vary with time have both been estimated from available data. The estimates indicate that engineering lifetimes of about 103 years are expected (providing that sulphate resisting cement is used) and that pH is likely to remain above 10.5 for about 106 years.

scholarly journals Integrated approach to risk assessment of potential surface radioactive waste storage

2019 ◽  
Vol 95 (2) ◽  
pp. 133-139
Author(s):  
I. P. Korenkov ◽  
Tatyana N. Lashchenova ◽  
N. K. Shandala ◽  
V. V. Romanov
Keyword(s):  
Radioactive Waste ◽  
Potential Surface ◽  
Integrated Approach ◽  
Comprehensive Approach ◽  
Potential Danger ◽  
Management Decisions ◽  
Near Surface ◽  
Waste Storage ◽  
Radioactive Waste Repositories ◽  
Waste Repositories

Algorithm for management of decision-making on the decommissioning of nuclear and radiation hazardous objects (RHO) should be both based on an comprehensive approach, with taking into account all the potential dangers, and relied upon on the requirements of a modern regulatory framework, as well as economically sound and socially oriented. The aim of the work was a development of a comprehensive approach to the assessment of the degree of the potential danger of near surface radioactive waste repositories in RHO, on the base of which it is possible to make substantiated management decisions for their decommissioning. Tasks: To develop an array of radio-ecological approaches, including radiation-hygienic, hydrogeological and engineering criteria for the assessment of the potential danger of radioactive waste repositories. Results There are presented radiation hygienic, hydrogeological and engineering and technical criteria on the basis of which there are calculated coefficients of the relative hazard of storages. In dependence to the value of the coefficients there are suggested four categories of danger - a safe, low dangerous, dangerous and very dangerous. There are elaborated approaches on management decisions-making in various variants of decommissioning - the conversion, renovation, conservation and liquidation.

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