1. A AR Unidad de Residuos de Alta Actividad Pb corrosion modelling

2. A AR A AR Hora System considered Pb Cube o 0.8 x 0.8 x 0.4 m Density o 11340 kg/m 3 Oxidation layer o 45  m o 6.3 mol Pb oxide Volume H 2 O 500 l Pb

3. A AR A AR Hora Modelling Steps and code used Equilibrium thermodynamic Pb + H 2 O o pH = 6 Diagram o Pourbaix diagram o Solubility Dry Oxidation air Equilibrium thermodynamic Pb oxide + Pb + H 2 O Codes used Phreeqc Interactive 2.13.2 o Solubility and speciation MEDUSA o Predominance o Speciation Data Base o Hydra v. 18 – Hydrochemical Equilibrium- Constant Database)  Royal Institute of Technology o ASM International's Binary Alloy Phase Diagrams – Second Edition, Plus Updates on CD-ROM

4. A AR A AR Hora 1 st step of working S Pb = 2·10 -7 M

5. A AR A AR Hora Air oxidation 1996 ASM Reaction Path

6. A AR A AR Hora Pb oxide + Pb dissolution Pb + H 2 O Pb(OH) 2  Equilibrium phase o Lowest oxidised Pb-oxide coat presence Phase considered o Pb 3 O 4 o PbO o PbO 2 (OH) 2 These phase increase the solubility  increase the amount of Pb sorbed by the resin

7. A AR A AR Hora Pb solubilty in DIW