Ausschreibungen

The UK Atomic Energy Authority is a non departmental government body carrying out research into the potential of nuclear fusion as a future source of energy. The authority operates MAST, which forms part of the UK & European Fusion Programme with the aim of magnetically confining and studying the behaviour of a plasma in conditions and dimensions approaching those required in a fusion reactor. MAST Upgrade is a programme designed to update the machine and push the limits of operations even closer. The MAST machine compromises of a vacuum vessel made of a cylindrical shell, 2 circular end plates and a thin centre tube in the middle, providing access and location for resistive coils and services in the vault created. Plasma facing surfaces are covered by tiles made of fine grain, high density isotropic graphite. The objective of this contract is the manufacture of a set of graphite armour tiles. It is estimated that up to 5 m³ of material (including waste) will be free-issued by the authority to manufacture approximately 1,000 tiles of 24 different designs. Typical material properties of the material are given below: bulk density greater or equal to 1 820 kg/m³, Grain Size 8-15 um, Specific Resistance 10-12 u ohm m, thermal conductivity > 100 W/m degrees C, Ash Content > 30ppm and high strength. The scope of work for the production of the graphite armour tiles (but is not limited to): manufacture of all jigs and fixtures. Manufacture and machining of test pieces to demonstrate tolerances and fit. Manufacture and machining of all tiles to final dimensions. Dimensional inspection of all components. Qualification of processes such as cleaning & heat treatment. Vacuum baking and cleaning of the components to UHV standards. Packaging & delivery this PIN has been published to enable market research to commence to asses the reaction of the market to the proposed requirement and review available technologies. The authority will conduct a dialogue with the marketplace. This may result in a call for competition based on the content of the requirement achieved through the dialogue.

Machining of graphite tiles.

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