The 15 th International Topical Meeting on Nuclear Reactor ThermalHydraulics, Operation and Safety (NUTHOS-15) will take place in Kashiwa-no-ha, Japan from Sep 28-Oct 01, 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 thermalhydraulics, 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 ThermalHydraulics and Computational Methods, Experimental ThermalHydraulics, 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. We sincerely invite you to contribute and participate in NUTHOS-15. Your participation will greatly enrich the discussions and the success of the event! 

Key Dates 

Abstract Deadline: November 30, 2025 

For details, see File Submission page. 

Draft Papers: February 28, 2026 

Final Papers: June 1, 2026 

Early Registration: Closes in June 2026

Contact: NUTHOS-15 Secretariat, info@nuthos.org