EFDA-JET-CP(08)04/02

Remote Handling Preparations for JET EP2 Shutdown

During the EP2 (Enhanced Performance 2) shutdown, planned to start in summer 2009 and to last for over 1 year, the JET tokamak will be upgraded to incorporate an ITER-like all-metal wall. Operating experience with this type of wall will aid ITER in their design choice for plasma facing components in divertor and plasma heating systems. It is essential that this extensive in-vessel refurbishment be completed in the shortest possible time and this has necessitated the implementation of a significant enhancement of the remote handling system. A new deployment method for RH tools and components has been devised comprising an extension to the articulated Boom, which enters the JET Vessel through the Octant 1 port. In the EP2 shutdown this will transport a multi-drawer task module to the workplace of the MASCOT (the JET servo-manipulator), which itself is deployed by the existing Octant 5 Boom. The new Octant 1 Boom can remotely exchange its task module inside the Octant 1 Boom Facility. This new Boom system will save time by eliminating the need for the existing Octant 5 Boom to frequently move around the torus in order to fetch new tools and components. It also reduces the dependence on manned entries in pressurised suits into the Octant 1 Boom facility to load the tool and component racks. In addition, the very large number of remote handling tasks demanded by the JET EP2 upgrade has required the design and development of an extensive range of new remote handling tools, examples of which will be described. This paper will discuss the design, control and operation of all the new remote handling equipment being developed at JET in preparation of the EP2 shutdown. It will also discuss the advances being implemented in management and presentation of operational data within the command, control and HMI (Human Machine Interface) system.
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