ACEMAKER: A processing system for producing ACEformatted files for Monte Carlo calculations.

Since 2016 the Nuclear Data Section of the International Atomic Energy Agency (NDS/IAEA) has encouraged the development of new codes for processing evaluated nuclear data for applications. The main motivation has been the need for improving processing methods and avoiding a common failure mode. The NDS/IAEA has supported the development of the processing system ACEMAKER as a natural extension of the PREPRO family for nuclear data processing with the aim of producing ACE-formatted files for Monte Carlo calculations. The new ACEMAKER modules can process any energy-angle distributions and gamma-production data. The system can generate ACE- formatted files for continuous-energy neutron and photonuclear data, thermal scattering laws and dosimetry cross sections, which can be used for Monte Carlo simulations. The paper summaries the ACEMAKER key features, ongoing verification and validation process, and planned future developments [ABSTRACT FROM AUTHOR]