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, two 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 363 graphite armour tiles from free issue graphite material in block form of 305 mm x 620 mm x 915 mm dimensions. Typical material properties of the material are given below : Bulk Density greater or equal to1820 kg/m3, Grain Size 8-15 um, Specific Resistance 10-12 u ohm m, Thermal Conductivity greater than 100 W/m degrees C, Ash Content greater than 20 ppm 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 and heat treatment. — Vacuum baking and cleaning of the components to UHV standards. Packaging and Delivery: The works are to be carried out in an acceptably safe and environmentally responsible manner and all personnel are to be suitably qualified and experienced for the nature of the contract. Invitation to Tender documents can be accessed for download by registering using the electronic access to Information URL link given in section I.1 above and responding to the e-mail which is sent automatically following registration.

Manufacture of graphite armour tiles.

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