(Top left) Two-dimensional axis-symmetric simulation domain intermediate level waste in clay. Dark blue area is the excavation damaged zone, yellow is the clay host rock, other colors different types of cementitious materials, the height of the disposal cell is about 13 m. (Top right) Portlandite distribution after 100 000 y. (Bottom) Evolution (50 000 yr, and 100 000 y) of calcite precipitation in the host rock.