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TWoFCS 2026 is an international workshop that brings together experts researching nuclear and fuel cycle strategies based on numerical analysis. Since the first workshop held in 2016, six workshops have been conducted to date. In 2026, Japan will serve as the host. TWoFCS2026 will be jointly held with NuMBAC, Japan's nuclear fuel cycle simulation research community and workshop. NuMBAC has evolved to incorporate not only traditional technical perspectives of nuclear fuel cycle simulation but also social science perspectives such as economics and sociology. By jointly hosting TWoFCS and NuMBAC, we aim to stimulate interdisciplinary discussions toward the advancement of nuclear fuel cycles in the future, going beyond conventional technical discussions.

The 15th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics, Operation and Safety (NUTHOS-15) will take place in Kashiwa-no-ha, Japan from September 27-30, 2026. The meeting will be hosted by the Japan Society of Atomic Energy (AESJ) and co-hosted by the American Nuclear Society (ANS), the European Nuclear Society (ENS), the Korean Nuclear Society (KNS) and Canadian Nuclear Society (CNS). Kashiwa-no-ha is an innovative science city located approximately 30 km north of Tokyo and 30 km south of Tsukuba, offering convenient access from major airports as well as to numerous attractions and natural areas. NUTHOS has been one of the major conferences in the nuclear thermal-hydraulics, operation and safety. The first NUTHOS was held in Taipei in 1984 followed by Tokyo (1986), Seoul (1988), Taipei (1994), Beijing (1997), Nara (2004), Seoul (2008), Shanghai (2010), Kaohsiung (2012), Okinawa (2014), Gyeongju (2016), Qingdao (2018), Hsinchu (2022) and Vancouver (2024). NUTHOS-15 offers various technical tracks including Thermal-Hydraulics and Computational Methods, Experimental Thermal-Hydraulics, Safety and Severe Accidents, Thermal-Hydraulics and Safety of Advanced Reactors, Plant Operation and Maintenance, Diagnostics and Monitoring, SMRs and Micro Reactors, and AI applications. It will be a valuable opportunity to exchange ideas, connect with colleagues from around the world, and help shape the future of nuclear science andengineering.

Atomic Energy Society of Japan