APOLLO3: a common project of CEA, AREVA and EDF for the development of a new deterministic multi-purpose code for core physics analysis

During the last decade, the interest in the nuclear industry for improved nuclear code systems has been growing. Based on an assessment of different reactor concepts (PWR, BWR, GFR, SFR, SCWR…) and of operating margins to cover uncertainties, the development of a new deterministic multi-purpose code APOLLO3 has been launched including lattice, core and lattice-core applications. In addition, the constant increase in high performance computing resources and in the ability to perform calculations on parallel computers gives new guidelines and opportunities for the development of the future code and for the extension of the methods to solve large-scale deterministic problems. APOLLO3 is a common project of CEA, AREVA and EDF for the development of new generation code system for core physics analysis providing improved accuracy, flexible software architecture and high computation performances and taking into account both R&D and industrial application requirements.