Our activities have included feasibility studies, safety analysis, basic and detailed design, procurement of equipment and tools for the dismantling, management of all the field activities including cutting, packaging and transfer of waste materials produced in the frame of the dismantling activities.
A systematic approach based on 'reverse engineering' and starting from On site Survey and Plant Physical Characterization has been followed to obtain a reliable picture of the plant status before initiating the dismantling activities.
Multidisciplinary engineering work for the overall dismantling of the building has been performed. This included preparation of the 3D CAD models, choice of applicable cutting techniques, definition of dismantling and handling sequences, safety analysis, assessment of personnel radiation exposure, evaluation of costs and timeline scheduling.
A detailed analysis of the Spooling of equipment/system has been performed and a software Data Base for traceability recording has been prepared. The detail design of dismantling operation accounted for sequences, waste route, cutting machines temporary confinement structures and buffer areas.
Alternate solutions have been analysed to define the best dismantling strategy based on technical, economical and ALARA requirements. Ansaldo management of in-field activities included the coordination and supervision of decommissioning activities as follows:
· Supervision to dismantling operation and civil work demolition
· Supervision to physical and radiological characterization of spool pieces and wastes
· Supervision of the activities in the Waste Management Facility (cutting, mechanical and chemical decontamination)
· Supervision of radiological monitoring
· Supervision of handling operation, packaging and waste storage