Development and Application of Open-Source Modelling and Simulation Tools for Nuclear Reactor Analysis

Many institutions have invested significant resources to developing modern Open-Source Software (OSS) for analyzing nuclear reactors. Recognizing this trend, the IAEA has taken the initiative to streamline and support the development of Open-Source Nuclear Codes for Reactor Analysis (ONCORE Initiative). Within the framework of ONCORE, the IAEA organized a technical meeting, ''Development and Application of Open-source Modelling and Simulation Tools for Nuclear Reactors,'' from 20 to 24 June 2022 in Milano, Italy. This publication serves as a comprehensive review of the current state of the field, featuring insights from experts, experiences, the latest innovations and technological challenges in OSS and open-access data. It also highlights ongoing collaborations supporting Research and Development, as well as education and training in nuclear science and technology, drawing from the papers presented during the ONCORE meeting.