1. Nuclear Energy Software Suite

A suite of external specialized 0-1D tools is used by ASCOMP’s Nuclear Energy Division to conduct research and industry services studies. The tools are developed and maintained by the most important and prestigious institutions and organizations in the area, including US-NRC and CEA.

In addition to the above software suite, ASCOMP develops and uses its own system code tools (TransAT CD&S à link to the page and TransAT TSA à link to the page), besides TransAT Suite for 3D THermalhydraulics, which are results of decades of expert intensive work

US Nuclear Regulatory Commission (USNRC)


    It is a system code for severe accident analysis covering both In-Vessel and Ex-vessel (In-containment) scenarios. These include thermal-hydraulic response in the reactor coolant system, reactor cavity, containment, and confinement buildings; core heatup, degradation, and relocation; core-concrete attack; hydrogen production, transport, and combustion; fission product release and transport behavior.

    Software is used also for the Probabilistic Safety Assessment Level 2, providing plant damages states and source terms needed for further Dispersions and Consequence Analysis, and Probabilistic Safety Assessment Level 3.

  • MelMACCS

    Generates the plant specific inputs, from the MELCOR source terms, for Dispersion and Dose Assessment for MACCS 2 and WinMACCS software.

  • MACCS 2 and WinMACCS

    • Dispersion and Dose Assessment,
    • Accident Consequence Analysis,
    • Probabilistic Safety Assessment Level 3
    • Emergency Planning Strategy Development

French Atomic Energy Commission (CEA)

    Software is a system Code for Analysis of THermalhydraulics during an Accident of Reactor and safety Evaluation (CATHARE). It is used for PWR safety analysis, accident management, definition of plant operating procedures and for research and development.

    A full coupling have been developed between CATHARE and TransAT Multiphase allowing detailed CFD analysis of the System Parts, Components, and In-Containment related phenomena such as Hydrogen Explosion.