Original building
Primary containment
Surface
water
drain
Radioactive
water
Ground
level
Radioactive
swarf
Bitumous liner
Protective cladding
Potential leaks
1. Through crack or construction joint.
2. Between primary wall and cladding.
3. Rise between wall and cladding.
First extension
Primary containment
Secondary containment
Radioactive
water
Standing
water in
sump
Radioactive
swarf
Waterproof membrane
Potential leaks
1. Through base slab.
2. Through passages for liquid level control systems and original sump emptying system.
3. Through rodding port.
4. Through secondary walls.
Original building
First extension
Primary containment
Primary containment
Secondary containment
Surface
water
drain
Radioactive
water
Radioactive
water
Ground
level
Radioactive
swarf
Standing
water in
sump
Radioactive
swarf
Bitumous liner
Protective cladding
Waterproof membrane
Potential leaks
Potential leaks
1. Through crack or construction joint.
2. Between primary wall and cladding.
3. Rise between wall and cladding.
1. Through base slab.
2. Through passages for liquid level control systems and original sump emptying system.
3. Through rodding port.
4. Through secondary walls.