EC GASNET Project: Gas Issues in the Safety Assessment of Deep Repositories for Nuclear Waste
- PDF / 63,700 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 97 Downloads / 233 Views
(&*$61(73URMHFW *DV,VVXHVLQWKH6DIHW\$VVHVVPHQWRI'HHS5HSRVLWRULHVIRU 1XFOHDU:DVWH Wim Cool1, Miguel Cuñado2, Lawrence Johnson3, Mia Mäntynen4, Wolfgang Müller5, Simon Norris6, William Rodwell7, Patrik Sellin8, Margit Snellman9, Jean Talandier10, Timo Vieno11, Sarah Vines6. 1 NIRAS/ONDRAF, Kunstlaan 14,1210 Brussels, Belgium; 2Enresa, E-28043 Madrid, Spain; 3 Nagra, Hardstrasse 73, CH-5430 Wettingen, Switzerland; 4Posiva Oy, FIN-27160 Olkiluoto, Finland; 5ISTec, Schwertnergasse 1, D-50667 Köln, Germany; 6United Kingdom Nirex Ltd, Curie Avenue, Harwell, Oxfordshire, OX11 0RH, UK; 7Serco Assurance, 150 Harwell IBC, Didcot, Oxfordshire OX11 0QJ, UK; 8SKB, PO Box 5864, S-102 48 Stockholm, Sweden 9 Saanio&Riekkola Oy, Laulukuja 4, FIN-00420 Helsinki, Finland; 10Andra, 1/7 rue Jean Monnet, Parc de la Croix Blanche, 92298 Châtenay-Malabry CEDEX, France; 11VTT Processes, P.O.Box 1608, FIN-02044 VTT, Finland $%675$&7 GASNET is a “thematic network” project supported by the European Commission. Its objectives are to evaluate the present treatment in safety assessments of issues arising from the generation of gas in deep geological repositories for nuclear waste, and to improve the translation of scientific information on these issues into safety arguments for such repositories. An overview is provided of the work that has been undertaken within the project and of the preliminary observations and conclusions that have been assembled. ,1752'8&7,21 One option for the long-term management of radioactive waste is to place it deep underground. Repositories for radioactive waste are expected to produce gases as a result of a variety of chemical, bacteriological and radioactive decay processes. Assessment of the impact of the gas produced on the integrity of the engineered barrier system and host rock, and on groundwater and radionuclide transport processes, is now recognised to be an important element of any safety case for disposal of such wastes. The EC GASNET thematic network aims to evaluate the present treatment of gas issues in safety assessments of deep repositories for various types of waste, using various engineered barriers in various types of geological media, and to improve the translation of scientific information on these issues into safety arguments for such repositories. It is intended to build on the foundation for improving the treatment of gas issues in safety analysis provided by a recent NEA workshop [1]. The emphasis is on the requirements of safety cases rather than on reviewing understanding of gas generation and migration processes, which have been addressed elsewhere [2]. The project commenced in September 2001, and will conclude formally in February 2004. The participating organisations are indicated by the affiliations of the authors of this paper. :25.352*5$00( The GASNET project will result in a final report that documents current approaches to the treatment of gas issues in the context of a safety case for a deep repository and discusses the strengths and limitations of these approaches
Data Loading...
