Industry

EASY-II European Activation SYstem

The European Activation SYstem (EASY), developed and maintained at Culham Centre for Fusion Energy, is an international standard for simulation of activation, transmutation processes caused by nuclear reactions and decay. It integrates information from data files and collaborators around the world into a single user-friendly package, which is invaluable for nuclear researchers and has wider applications for industry; nuclear fission and fusion, accelerator physics, isotope production, stockpile and fuel cycle stewardship, materials characterisation, life and storage cycle management.

The European Activation SYstem EASY-II(12) has been re-engineered and re-written in modern f95 programming language so as to answer today’s and tomorrow’s needs in terms of activation, transmutation, depletion, burnup and inventory requirements. The FISPACT-II code development project has allowed to embed many more features in terms of energy range; up to GeV; incident particles, alpha, gamma, proton, deuteron, neutron; and neutron physics, self-shielding effects, temperature dependence and covariance so as to really cover all application needs: transport, shielding, inventory, medical, astrophysics.

In parallel, the maturity of modern, truly general purpose libraries encompassing thousands of target isotopes such as TENDL, the evolution of the ENDF nuclear data format and the capabilities of the latest generation of processing codes PREPRO, NJOY and CALENDF have allowed the inventory code to be fed with more robust, complete and appropriate data forms: cross sections with covariance, probability tables in the resonance ranges, kerma, dpa, gas and radionuclides production and up to 23 decay types. All such data for the five most important incident particles (n, p, d, alpha, gamma) are available in evaluated data files with information up to an incident energy of 200 MeV.

The resulting code system, EASY-II(12) is designed as a functional replacement for the previous European Activation SYstem, EASY-2010. It includes many new features and enhancements, but also benefits already from the feedback from extensive validation and verification activities performed with its predecessor.

For more information please contact Jean-Christophe Sublet at CCFE – email
jean-christophe.sublet@ccfe.ac.uk.