b, β1 and β2 constants for the Klinkenberg equation
CI concentration of ions per unit volume of liquid (kg/m3)
Cs total concentration per unit volume of the solid (kg/m3)
D diffusion coefficient (m2/s)
Da apparent or effective diffusion coefficient (m2/s)
Di intrinsic diffusion coefficient (m2/s)
DD dry density (mass/bulk volume) (kg/m3)
Fa Faraday constant = 9.65 × 104 C/mol
g gravitational constant = 9.81 (m/s2)
Ia, Ic anode and cathode current (A)
Ia0, Ic0 anode and cathode exchange current (A)
ISA initial surface absorption (m3/m2/s)
ISA10 ISA value at 10 min (m3/m2/s).
k coefficient of permeability (m/s)
Kg gas intrinsic permeability of concrete (m2)
KI water intrinsic permeability of concrete (m2)
Kv vapour intrinsic permeability for the vapour (m2)
K∞ intrinsic permeability at infinite pressure (m2)
Patm atmospheric pressure (Pa)
P10, P20 initial low and high pressures (Pa)
Q gas generation rate or volumetric flow (m3/s)
R gas constant = 8.31 (J/mol/K)
SG specific gravity (mass/net volume) (kg/m3)
Sθ tangential hoop stress (Pa)
ti transference number for ion i
ui mobility of species i in the pore fluid (m2/s/V)
VF Darcy velocity for the fluid (m/s)
V % coefficient of variation %
V0 volume of drilled hole (m3)
V′ ratio of the reservoir volumes (V1/V2)
WF ratio of the water vapour volume to the volume of the same mass of water as a liquid
X distance across permeation block (m)
x1 separation of drilled holes (m)
γν radial displacement of the void surface (m)
γ surface tension of the mercury (N/m)
σ electrical conductivity (Ωm)−1
ɸa0, ɸc0 anode and cathode exchange voltage (V)
φ contact angle of the mercury with the pore surface
ξ outer radius of repository (m)
ASTM American Society for Testing and Materials
CAT cover concrete absorption test
DD dry density (mass/total volume)
GGBS ground granulated blastfurnace slag
HDPE high density polyethylene
ISA or ISAT initial surface absorption (test)
LVDT linear voltage displacement transducer
M molar (concentration mol/litre)
N normal (concentration mol/litre)
MIP mercury intrusion porosimeter
NTBUILD Norwegian standard for building
SCE saturated calomel electrode