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Fabrication of the Diverter vessel for the Evaporator D project
A project to design and build three different diverter vessels & drive units for Sellafield Ltd has just been completed. NIS handled many aspects of the scope including the detail design, purchase of materials and proprietary components, manufacture, inspection, and testing. NIS has also previously supplied gamma pots and ancillary equipment as part of the Evaporator 'D' contract.
Evaporator ‘D', which is currently being constructed at Sellafield, is a new highly active liquid evaporator that will provide additional capacity to existing equipment. This part of the plant plays a pivotal role in the delivery of reprocessing, historic clean up and hazard reduction missions across the site. The diverter vessels are vital to the processes involved in this, and therefore the equipment needed to be manufactured to the very highest quality standards, as well as addressing all foreseeable safety and security concerns.
The through-wall drive assemblies and the diverter vessels were assembled in a purpose built rig and tested to demonstrate their safe and controlled operation. The whole assembly was then subjected to functional testing to ensure the operational sequence was compliant.