Design of underground supports for high-level nuclear waste repositories

1990 ◽  
Vol 27 (1) ◽  
pp. 59
Keyword(s):  
Nuclear Waste ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Waste Repositories

scholarly journals Towards higher temperatures in nuclear waste repositories

2020 ◽  
Vol 205 ◽  
pp. 01001
Author(s):  
Antonio Gens ◽  
Ramon B. de Vasconcelos ◽  
Sebastià Olivella
Keyword(s):  
Nuclear Waste ◽  
Large Scale ◽  
Maximum Temperature ◽  
Spent Fuel ◽  
Thermally Induced ◽  
Large Scale Field ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Host Rocks ◽  
Waste Repositories

Recently, there is a tendency to explore the possibility of increasing the maximum design temperature in deep geological repositories for high-level nuclear waste and spent fuel. In the paper, a number of issues related to the use of higher temperatures are reviewed. Both bentonite barriers and argillaceous host rocks are addressed. An application involving the modelling of a large-scale field test conducted at a maximum temperature of 140ºC is presented. It is shown that currently available theoretical formulations and computer codes are capable to deal with temperatures above 100ºC and to reproduce satisfactorily the thermally-induced overpressures in the rock.

scholarly journals UO2 as New Filling Material for Cesium Retention in High-Level Nuclear Waste Repositories

2015 ◽  
Vol 32 (10) ◽  
pp. 854-857
Author(s):  
Albert Martínez-Torrents ◽  
Javier Giménez ◽  
Joan de Pablo ◽  
Ignasi Casas
Keyword(s):  
Nuclear Waste ◽  
Filling Material ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Waste Repositories

Environmental Remediation of High-Level Nuclear Waste in Geological Repository: Modified Computer Code Creates Ultimate Benchmark in Natural Systems

2010 ◽  
Author(s):  
Geoffrey J. Peter
Keyword(s):  
Nuclear Waste ◽  
Environmental Remediation ◽  
Computer Code ◽  
Nuclear Waste Repository ◽  
Natural Systems ◽  
Permanent Storage ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Waste Repositories

Isolation of high-level nuclear waste in permanent geological repositories has been a major concern for over 30 years due to the migration of dissolved radio nuclides reaching the water table (10,000-year compliance period) as water moves through the repository and the surrounding area. Repositories based on mathematical models allow for long-term geological phenomena and involve many approximations; however, experimental verification of long-term processes is impossible. Countries must determine if geological disposal is adequate for permanent storage. Many countries have extensively studied different aspects of safely confining the highly radioactive waste in an underground repository based on the unique geological composition at their selected repository location. This paper discusses two computer codes developed by various countries to study the coupled thermal, mechanical, and chemical process in these environments, and the migration of radionuclide. Further, this paper presents the results of a case study of the Magma-hydrothermal (MH) computer code, modified by the author, applied to nuclear waste repository analysis. The MH code verified by simulating natural systems thus, creating the ultimate benchmark. This approach based on processes similar to those expected near waste repositories currently occurring in natural systems.

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