CIGEO – Thermal simulations:

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CIGEO – Thermal simulations:

CIGEO, (Industrial centre for geological storage of HA and MA-VL waste) – Evaluation of the warming due to the heat given off by radioactive waste and its impact on the project.

 

Projet : 

Deep storage consists of storing nuclear waste in a deep geological formation which is able to assure containment of radionuclides in the very long term.

 

ANDRA is responsable for designing and building such a centre. CIGEO -  Industrial centre for geological storage.

 

Key figures for the project:

 

Expected waste volume (industrial scenario provided by waste producers, end of life of the current nuclear fleet): approximately 70 000 m3 of MA-VL waste (of which approximately 60% already exist) and 10 000 m3 of HA waste (of which approximately 30% already exist). Footprint of the outdoor installations: approximately 300 hectares.

 

Link between the surface and the bottom: Four 500 m deep wells and a 5 km double decline (inclined tunnel).

 

Underground installations:

  • Linking galleries – approximately 100 kms
  • MA-VL storage cells: 20 kms
  • HA storage cells: 200 kms

 

Final total footprint of the underground installations: approximately 15 km2

Mission : 

ISL services consisted of evaluating the warming due to the heat given off by radioactive waste and its impact on the project. The thermal simulations that were carried-out can be classified into several categories:

 

  • Thermal design calculation: Design a layout that minimizes the storage cost whilst respecting the predefined maximum temperature thresholds

 

  • Large scale and long term calculations: Estimation of the warming of the geological massif and the time necessary for its large-scale cooling down (kilometric) and in the long term (hundreds of thousands of years)

 

  • Ventilation calculations: Estimation of the warming of the air ventilated in the galleries and the impact of the ventilation on the evolution of temperatures in the storage area
Le projet
Pays/région : 
France
Client: 
Andra – Agence nationale pour la gestion des déchets radioactifs
Période : 
2011-2012