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As part of its Simulation programme, the Military Applications Division of the CEA is undertaking a project known as Tera. The project is being run in three stages (2001, 2005 and 2010) and aims to provide the simulation resources required for the design and guaranteed operation of nuclear weapons without testing.

At the end of 2001, the first stage, Tera-1, led to installation of a 5-teraflop supercomputer manufactured by HP.

At the end of 2005, the second stage, Tera-10, led to the installation of a 60-teraflop supercomputer manufactured by Bull. This step was performed alongside by an adaptation of the infrastructure of the defence computing centre as well as a complete update of the storage and archiving systems, networks and visualisation hardware.

Since October 2010, the third step Tera-100 provides the CEA/DAM with more than 1 Petaflop of computing power. Since July 2009, a demonstrator model has been installed and used in order to validate the use of the program codes.







flbRead more about Tera 100


  • J. Gonnord, Director of Computer Simulation and IT Project at CEA/DAM
  • P. Leca, Director of Simulation and Information Sciences Department at CEA/DAM
  • The Tera computing centre is made up of computers, very high-capacity data storage systems, high flow communications networks and post-processing and visualisation equipment, etc. These resources are put in place whilst paying constant attention to improving energy efficiency and environmental impact.

    1 Teraflop = one thousand billion operations per second
    1 Petaflop = one million billion operations per second




    Building the architecture for HPC

    Controlling data flow


    Towards a very high bite rate network


    Optimizing energy consumption