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Table 1 Elements of the categories for the system, components/processes, and properties/phenomena considered in the natural analogue database

From: Development of a natural analogue database to support the safety case of the Korean radioactive waste disposal program

System

Components/processes

Properties/Phenomena

EBS

Silicate glass

Devitirification

Radiation induced effects

Dissolution and alteration

Radionuclide retardation by secondary alteration products

Spent fuel

Dissolution and radionuclide release

Radionuclide retardation by secondary alteration products

Metal

Durability and longevity of iron and steel

Durability and longevity of copper

Radionuclide retardation by secondary alteration products

Bentonite

Longevity of bentonite and the rate of alteration

Physico-chemical changes due to heating

Canister sinking

Interaction with other repository materials

Hydraulic barrier and colloid filter functions

Concrete and cement

Durability of cement

Cement-rock-groundwater interactions

Radionuclide sorption

Colloid production and filtration

Gas and water permeability

Bonding properties of cement and concrete

Bitumen

Durability and longevity

Groundwater leaching

Microbial degradation

Radiation induced degradation

Interaction with saline water

Organic material

Cellulose degradation

Cellulose degradation products

Natural resins

Elemental solubility and speciation

Elemental solubility

Speciation

Host rock

Elemental solubility and speciation

Elemental solubility

Speciation

Elemental retardation

Transport and retardation within fractured crystalline rocks

Transport and retardation within argillaceous rock

Transport and retardation at the geosphere-biosphere interface

Measurement of in situ distribution coefficient

Matrix diffusion

Depth and volume of interconnected porosity

Bulk rock chemical buffering capacity

Extent of matrix diffusion in sedimentary formation

Estimation of diffusion coefficient

Radiolysis

Process involved in radiolysis of groundwater

Radiolysis in nature (how common is radiolysis in nature)

Potential buffering capacity of reduced iron corrosion phases

Redox front

Redox front formation and behavior in crystalline rocks

Redox front formation and behaviour in argillaceous rocks

Radionuclide migration at a redox front

Colloids

Populations of colloids in natural systems

Stability of colloids in natural systems

Radionuclide uptake and transport by colloids in natural system

Colloid in anthropogenic systems

Biocolloids

Microbial activity

Microbial populations at depth in natural systems

Tolerance to hyper alkaline conditions

Nutrient and energy availability

Gas generation and migration

Gas production rates

Gas migration and reaction with the geosphere

Gas migration effects on solute transport

  1. EBS engineered barrier system