The decommissioning and management of nuclear waste involves complex activities that must be addressed as safely and efficiently as possible:

  • Existing plant operations
  • Fuel cycle facilities
  • Recycling/reprocessing/waste disposal
  • Decommissioning of permanently shut-down plants

The nuclear decommissioning market is estimated to be worth more than €200 billion throughout the world in the coming decades (with Europe accounting for 75%), putting the implementation of effective methodologies for faster, safer, and more cost-effective decommissioning at the heart of the challenges facing the nuclear industry.

Whatever the type of facility to be decommissioned or the type of waste to be managed, at least three major challenges must be considered:

Industrial challenges:

  • Standardisation of decommissioning processes and activities
  • Integration of waste management processes

Technical and safety challenges:

  • Interventions under constraints, specificity of installations to be dismantled
  • Guarantee of operational safety (people, facilities and environment)
  • Technical integration across decommissioning programmes

Economic challenges:

  • Control of decommissioning costs
  • Optimisation of lead times
  • Reliable and diversified supply chain, involving SMEs (socio-economic value)

Assystem's expertise in the entire life cycle of nuclear facilities for over 55 years enables us to address the full complexity of this issue.

Our expertise

We assist nuclear operators in managing the end of life of their assets, from defining decommissioning scenarios to designing and supplying storage and treatment facilities for waste from all activities. In coordination with local and international nuclear authorities, we intervene at each stage of the decommissioning life cycle, for all types of facilities to be dismantled:

  • Cycle facilities
  • Experimental reactors
  • Nuclear power plants

Our added value in decommissioning and waste management mainly focuses on our expertise in:

  • Shut-down of facilities
  • Decommissioning scenarios
  • Definition of appropriate waste streams
  • Integration of remote robotics handling solutions
  • Design and delivery of support facilities for decommissioning operations and waste management

Regarding waste management, the Assystem teams have proven expertise in defining and delivering solutions for the decommissioning of nuclear facilities (reactors, fuel cycle plants, laboratories, research facilities, etc.). We have been involved in these areas in France and the United Kingdom for decades. More recently, Assystem also deployed its expertise in Europe and the Middle East (Saudi Arabia).


  • Project management (PMC, PMO)
  • Field operation management
  • Siting, licensing, and environmental services
  • System engineering and design
  • Industrial Control Systems
  • Risk and safety studies
  • Digital decommissioning
  • Security and Industrial Cybersecurity

Learn more about our EngineeringDigital and Project Management activities.

our references

Realisation of a BIM model for the dismantling of a nuclear reactor

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Design and construction support for the decommissioning of nuclear site

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Studies and implementation of PLM for the dismantling of a nuclear plant

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