A Model‐Based Approach to Design, Organize, and Monitor Dismantling and Decommissioning of Nuclear Facilities

Abstract

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.

Model‐based architecting evaluation method for the delivery of complex nuclear projects

“…The construction and handover of nuclear infrastructures (NI) all over the world are very long and subject to many reworks and modifications 5 . NI design projects must pay particular attention to safety, security, environmental, and dismantling requirements, 6 nuclear waste management issues, and public acceptance. To face this complexity, new approaches are needed to facilitate the delivery of future NI.…”

“…To do this, and to ensure that the whole remains consistent throughout the project, Transformation and alignment mechanisms converge towards a model of the system to be built, integrating models, data, information, and project knowledge. This federated model is then seen as a digital model 34 of the SoI to authorize, support, and, as far as possible, simplify the evaluation process set up by EVA-CIME. This mock-up is intended to be an interpretable model (formal operational semantics defined), executable, or at least formally interpretable in whole or in part, making it a source of verified information for future evaluation activities.…”