Construction steps

Emplacement of Bentonite/Sand material

Construction of concrete silo

Concrete silo base	Concrete silo re-inforcement
Emplacement in the annulus	Top concrete silo forms
Top concrete silo instrumentation overview

Instrumentation

In all some 210 instruments have been placed within the EBS and backfill including 96 piezometers (internal and external), 10 temperature sensors, 11 total pressure cells and 70 Time Domain Reflectometers (TDRs) to measure water content (and hence saturation) of the EBS. Also included are gas samplers and novel fibre optic measuring systems.

Side Elevation showing Instrumentation

Level 8 (Concrete silo and sand/bentonite)

Horizontal TDR

Pressure and humidity sensors

Instrumentation of Level 2

Instrumentation as built

Instrumentation of top Level