The module is a 900 tonne box mounted on rails to allow entry into 4 areas within B212. The module housed the decommissioning machine (DCM), associated tooling, cask and waste handling equipment and sub change areas. The majority of the decommissioning work was undertaken by a bespoke tool deployment arm. The TDS is capable of a payload of over 250kg and can deliver 200 bar hydraulic supply, 110 volt AC, and several 24 volt DC signals to smaller tooling at the front end. The smaller tooling is connected via an arterial connection system design which can be remotely latched for in-cell tool changes.