Description
The processes that directly affect the migration of contaminants in the geosphere.
Category
Categorisation as a Feature, Event and/or Process.
Features
are physical components of the disposal system and environment being assessed. Examples include waste packaging, backfill, surface soils. Features typically interact with one another via processes and in some cases events.Events
are dynamic interactions among features that occur over time periods that are short compared to the safety assessment timeframe such as a gas explosion or meteorite impact.- "Processes" are issues or dynamic interactions among features that generally occur over a significant proportion of the safety assessment timeframe and may occur over the whole of this timeframe. Events and processes may be coupled to one another (i.e. may influence one another).
The classification of a FEP as an event or process depends upon the assessment context, because the classification is undertaken with reference to an assessment timeframe. In this generic IFEP List, many IFEPs are classified as both Events and Processes; users will need to decide which of these classifications is relevant to their context and its timeframes.
- FEP Subgroup
Relevance to Performance and Safety
The “Relevance to Performance and Safety” field contains an explanation of how the IFEP might influence the performance and safety of the disposal system under consideration through its impact on the evolution of the repository system and on the release, migration and/or uptake of repository-derived contaminants.
2000 List
A reference to the related FEP(s) within the 2000 NEA IFEP List.
Related References
-
Rabung T (ed) (), Crystalline Rock Retention Processes (CROCK) Project Final Report, EC Grant Agreement Number FP7-269658, European Commission, 36, http://cordis.europa.eu/pub/fp7/euratom-fission/docs/crock-final-report.pdf
-
Hodgkinson D, Benabderrahmane H, Elert M, Hautojärvi A, Selroos J-O, Tanaka Y, Uchida M (), An overview of Task 6 of the Äspö Task Force: modeling groundwater and solute transport: improved understanding of radionuclide transport in fractured rock, Hydrogeology Journal, Springer, 17, 1035-1049
-
IAEA (), The Use of Numerical Models in Support of Site Characterization and Performance Assessment Studies of Geological Repositories: Results of an IAEA-coordinated Research Project 2005–2010, IAEA TecDoc Series No. 1717, International Atomic Energy Agency, Vienna, 119, http://www-pub.iaea.org/MTCD/Publications/PDF/TE-1717_web.pdf
-
Mazurek M, Epping PA, Bath A, Gimmi T and Waber NH (), Natural Tracer Profiles Across Argillaceous Formations: The CLAYTRAC Project, Report NEA No. 6253, Nuclear Energy Agency/Organisation for Economic Cooperation and Development, Paris, 361, http://www.oecd-nea.org/rwm/pubs/2009/6253-claytract-project-2009.pdf
-
RWM (), Geological Disposal: Behaviour of Radionuclides and Non-radiological Species in Groundwater Status Report, Report No. DSSC/456/01, Nuclear Decommissioning Authority, https://rwm.nda.gov.uk/publication/geological-disposal-behaviour-of-radionuclides-and-non-radiological-species-in-groundwater/, November 2016