Objetivo The objective of the work to be undertaken within this project is to provide information on the release of radionuclides from low level waste (LLW) under fire accident conditions and to understand how these releases depend on the severity and characteristics of the fire accident. Mathematical models will be used to enable the response of packaged LLW under various conditions to be predicted. Little information relevant to this topic is available. The approach to the project (based on large-scale inactive tests, mathematical modelling, and small-scale active experiments) is similar to that used in a previous study of immobilised intermediate level waste, but will take account of the special properties of LLW and its constituents that are relevant to its behaviour under fire conditions.Work programme: A literature review will be carried out on the release of radionuclides from LLW under fire accident conditions and related areas, such as the relevant physical and chemical properties of LLW, fire conditions, etc. Mathematical models will be developed and validated for the thermal behaviour of LLW, including heat and mass transfer, gas diffusion and combustion phenomena. Large-scale thermal tests will be carried out on simulated LLW in two stages: the first to provide a basis for the modelling and to define conditions for active experiments; and second, to validate the models and provide a basis for applying the results to a range of situations. Small-scale thermal tests will be made to determine the releases of radionuclides from radioactive samples of individual LLW components and mixtures, under conditions to be defined from the modelling work and large-scale tests. Ámbito científico engineering and technologyother engineering and technologiesnuclear engineeringnuclear waste managementnatural scienceschemical sciencesnuclear chemistryradiation chemistrynatural sciencesmathematicsapplied mathematicsmathematical model Programa(s) FP2-RADWASTOM 4C - Specific research and technical development programme (Euratom) in the field of management and storage of radioactive waste, 1990-1994 Tema(s) A.3.4 - Quality control of waste conditioning Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador United Kingdom Atomic Energy Authority (UKAEA) Aportación de la UE Sin datos Dirección Winfrith Technology Centre DT2 8DH Dorchester Reino Unido Ver en el mapa Coste total Sin datos
