## 3 Conclusions
The successful deployment of microreactors heavily depends on the current state and future of nuclear fuels. In this context, various strategies must be developed for the production and supply chain management of HALEU fuel. Firstly, it is essential to increase the existing HALEU production capacity. Modernizing current production facilities plays a critical role in this process. Updating these facilities with new technologies will enhance production efficiency and allow for higher quantities of HALEU production. Additionally, establishing new facilities for the production of highly enriched uranium is crucial. These new facilities should be planned to meet increasing demand and operated in compliance with international standards. Various research and development projects should be conducted to develop HALEU production techniques and improve existing methods. The United States, in particular, is undertaking several R&D projects aimed at increasing HALEU production capacity. These projects should focus on developing new production techniques and improving current ones. Moreover, these projects should be supported through international collaborations and increased knowledge sharing. Effective supply chain management must be established to ensure the secure and efficient supply of HALEU fuel. Strict security protocols and logistical planning should be implemented at all stages from production to consumption. Innovative solutions like blockchain technology should be utilized in this context. Blockchain can enhance the transparency and reliability of the supply chain by recording and tracking all movements of the fuel from production to final use. To balance the high costs of HALEU fuel and make microreactors economically attractive, economic incentives and support programs should be developed. Such incentives will facilitate the long-term economic benefits of microreactors. Finally, the use of HALEU fuel can contribute to environmental sustainability by reducing carbon emissions. Microreactors should be integrated with renewable energy sources to minimize dependence on fossil fuels. However, the use of highly enriched uranium also brings security and proliferation risks. Therefore, to ensure the safe operation of microreactors, security protocols and regulatory mechanisms in line with international standards must be developed. Innovative solutions like blockchain technology can help manage these risks by enhancing the traceability and security of nuclear fuels. This review paper comprehensively addresses the technological advantages, economic challenges, and blockchain-technology-related solutions for microreactors. The main points of the paper and future perspectives are summarized below. Firstly, microreactors offer numerous technological advantages such as high safety standards, flexibility, and modularity. These reactors can be installed more quickly and operated at lower costs compared to traditional large-scale nuclear reactors. However, the limited production capacity of HALEU fuel and supply chain issues hinder the widespread economic adoption of microreactors. To overcome these challenges, it is essential to increase production capacities and develop new supply chain solutions. Blockchain technology can play a significant role in overcoming economic challenges by enhancing the traceability and security of the nuclear fuel supply chain. The implementation of this technology will increase transparency and reliability in the supply chain. Additionally, the comparative analysis of small modular reactor projects in different countries reveals the global status and potential advantages of microreactors. Projects in countries like the United States, Canada, and Russia demonstrate various applications and regulatory approaches of microreactors. In the future, it will be crucial to modernize existing facilities and establish new ones to boost HALEU fuel production capacity. International collaborations and joint projects can help accelerate this process.