Dismantling and Decommissioning (D&D) of nuclear facilities involves complex operations requiring the collaboration of a large number of stakeholders from various activities, and has to deal with numerous significant constraints. The CEA (French Alternative Energies and Atomic Energy Commission), is conducting research to better pilot these operations and reduce their costs and timeframes, and to improve overall performance. To this end, many issues remain to be solved, which lead to studying, then implementing in the form of a method with appropriate tools, the principles from systemics and the engineering of complex projects and systems. This method first consists in formalizing and specifying the entire set of requirements to be taken into consideration. Second, based on these requirements, the method will enable the project team to structure, check, and then to demonstrate the coherence and feasibility of the project from both the technological and organizational points of view. Lastly, the method should permit a constant re-evaluation of the D&D strategy and the management of its products, depending on the possible evolution of the D&D projects. Demonstration software is being developed, aiming to provide the functionalities requested for the design, implementation and maintenance of a future enterprise software, which should provide a complete D&D project Digital Mock-Up being interoperable and connected to the tools and databases of the stakeholders' information systems.
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