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When decommissioning an energy facility, the key targets are the safety of workers and nearby population, as well as elimination or containment of toxic materials and radioactivity to avoid contamination now and for future generations.

Safe Plant Decommissioning Industry Solution Experience, powered by Dassault Systèmes 3DEXPERIENCE® platform, helps to successfully implement an ALARA (As Low As Reasonably Achievable) risk mitigation approach, maximizing safety and optimizing costs by more efficiently engineering the dismantling and waste clearance planning. Disassembly is optimized to control nondissemination of toxic or radioactive materials, and maximize components reuse and recycling where possible. Project execution is monitored and measured with full visibility in real time, enabling delivery of a clean and safe field.

Project management & execution integrated with Quality Management System

Decommissioning energy facilities, in particular when they are nuclear, requires compliance to health and safety requirements first.  The3DEXPERIENCE platform environment helps you meet the huge lists of regulatory requirements. A world-class digital process for quality-monitoring can be built by expanding individual requirements into granular data that can then be digitally related to the plant assets and decommissioning tasks.

Key Highlights & Benefits

  • Unify project information such as master schedule, work breakdown structure, activities and tasks, roles and responsibilities, execution status, etc.
  • Enforce standard review processes, validation workflows and delivery processes with, input, output according to procedures set in place by project stakeholders.
  • Recognize and isolate requirements from documents such as contract line items or specification sheets and allow tracking of requirements inside a project for securing their fulfilment.
  • Trace impact of changes across deliverables.
  • Update task execution status immediately in project status reports. Provide real-time project KPI from all project activities.
  • Manage issues & risks with associated information and monitor status of issues & risks in real-time manner.
  • Implement Quality Audit and CAP (Corrective Action Program) processes.
  • Integrate lesson learned for lean continuous improvement.

Technical asset information management &
3D digital plant with radioactive waste distribution

While decommissioning of a new NPP is now a process to be prepared for starting with design, it was not the case in the 1960s. Therefore, detailed facility and asset characterization is a mandatory preparation activity. Due to plant evolution during facility life, information is not only disseminated in several systems, but is often inadequate, obsolete, or even missing. Safe Plant Decommissioning manages inventory in the context of a multi-disciplinary plant breakdown structure, in association with the creation of a twin of the plant in digital 3D, with accurate bills of material associated with the evidences of radioactive waste distribution. Using such a single source of truth as a basis, a safe and efficient waste management plan can be comprehensively scheduled.

Key Hightlights & Benefits

  • Single source of truth for asset-related technical information available for all project stakeholders such as room inventories, pictures, documentation, time series of sensors, drawings, etc.
  • Asset information organized following a multidisciplinary plant breakdown structure (classification per system or per room or per discipline, etc.)
  • Asset information managed in association with 3D
  • Accurate Bill of Material / Bill of Quantity / radioactive waste distribution
  • Bill of Material / Bill of Quantity computed with associated 3D evidence

Decommissioning plan optimization & validation

Schedule alternatives are simulated upstream thanks to the 3D virtual twin of the facility, enabling selection of the safest solution that is most efficient and technically achievable. Self-guided robots can be programmed. 3D instructions obtained from schedule definition can help improve worker understanding by delivering an animated step-by-step disassembly sequence. Whether involving human operation or remote material handling systems, worker and contractor teams can learn and repeat disassembly operations in a risk-free virtual environment, enabling better safety and efficiency when executing the actual work.

Key Highlights & Benefits

  • Simulate scenarios in 4D, optimize deconstruction plans taking various constraints into account
  • Forecast radioactive waste production and optimize for constraints
  • Assess workers’ dosage for safety and optimization
  • Prepare detailed planning of deconstruction and waste production
  • Validate and optimize remote handling operations

Temporal structural integrity validation with simulation

The plant digital twin helps ensure worker health and safety during dismantling when temporary structures are created for some operations, while in others, the building is deconstructed throughout the decommissioning lifecycle. Safe Plant Decommissioning delivers time dependent deconstruction building and temporary structures configurations as 3D data that are ready for simulating structural integrity, and to review and validate collapse-free deconstruction while radiation is always contained.

Key Highlights & Benefits

  • Perform structural studies at any stage of the decommissioning phase and any configuration of the facility incl. non-linear structural studies
  • Perform decommissioning scenario study – in relation with Safe Scheduling above – allowing with structural integrity into account
  • Design temporary reinforcement structure in context of scenario study

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