The ERANOS Code and data system for fast reactor neutronic analyses

TLDR

ERANOS 2.0 offers a range of modelling options for fast reactor analysis. The system comprises ECCO, BISTRO, TGV/VARIANT codes and a special procedure for equivalent homogeneous cross sections, with a recommended reference core calculation route. Extensive validation shows ERANOS 2.0 predicts the main characteristics of conventional and advanced liquid‑metal‑cooled fast reactors with excellent accuracy and is also suitable for advanced cores, source‑driven sub‑critical media, and gas‑cooled fast reactors.

Abstract

The main modelling options of ERANOS 2.0, the latest version of the ERANOS fast reactor analysis code and data system, are described. These include the ECCO cell and lattice code (Collision Probability Method in many groups using the subgroup method), the BISTRO 2-D S n transport code, the TGV/VARIANT 3-D Nodal Variational Transport code, and a special procedure for creating equivalent homogeneous cross sections for control rods. The recommended reference core calculation route is presented. A summary of the ERANOS extensive validation is provided. It is concluded that ERANOS 2.0 can predict the main characteristics of conventional as well as advanced liquid-metal-cooled fast reactors with an excellent accuracy, and that it can also be used for modelling advanced fast reactor cores, source-driven sub-critical media and gas-cooled fast reactors.