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EASY-II European Activation SYstem

EASY-IIThe European Activation SYstem (EASY-II), developed and maintained by the United Kingdom Atomic Energy Authority at Culham, is an international standard for simulation of activation, transmutation processes and radiation damage sources terms caused by nuclear reactions and decays. It is written in modern object-style Fortran programming language so as to answer today’s and tomorrow’s needs in terms of activation, transmutation, depletion, burnup, decays, source terms and inventory requirements. The FISPACT-II code development project has allowed for the inclusion of many more features in terms of: energy range – up to GeV; incident particles including alphas, gammas, protons, deuterons and neutrons; and neutron physics including self-shielding effects, temperature dependence, thin and thick target yields, pathways analysis, sensitivity and uncertainty quantification and propagation using covariance data. The result is a software suite that can accommodate all possible needs for nuclear applications.

In parallel, the maturity of modern-technology-generated, general-purpose libraries such as TENDL, encompassing thousands of target isotopes, the evolution of the ENDF format, and the capabilities of the latest generation of processing codes PREPRO, NJOY and CALENDF have allowed the FISPACT-II code to be fed with more robust, complete and appropriate data forms, including resonance parameters, cross-sections with covariance, probability tables in the resonance ranges, pka spectra, kerma, dpa, gas and radionuclide production supplemented with 24 decay types. All such data for the five most important incident particles are placed in evaluated data tables up to an incident energy of 200 MeV.

EASY-II is a 21st century simulation platform of observables for nuclear sciences and technology, with applications in:

  • Magnetic and inertial confinement fusion
  • Advanced fission Gen IV and beyond
  • Advanced energy and fuel systems
  • High energy and accelerator physics
  • Medical applications, isotope production
  • Earth exploration, astrophysics
  • Homeland security
  • And more…