This TECDOC compiles international experiences and safety practices related to experimental fusion machines. Its objective is to provide an insight into the safety considerations for prototype, demonstration, and future commercial fusion power plants, collectively referred to in this publication as fusion power plants (FPPs). Based on questionnaire responses submitted by experts from various Member States and international organizations, it highlights the safety approaches employed in a range of currently operating and planned experimental fusion facilities, as well as those being developed for future FPPs. The information within this TECDOC aims to improve the general understanding of the safety considerations for future FPPs and will serve as a foundation to determine whether fusion-specific design safety and safety assessment standards may be necessary. This TECDOC is intended for public and private sector organisations with an interest in FPPs, including those involved in research, design, manufacturing, construction, operation, regulation, or technical support. It also targets individual stakeholders engaged in addressing the safety aspects of fusion energy technologies.