Please be informed that the meeting schedule of NUTHOS-15 has been adjusted as follows:

New Meeting Dates: September 28 – October 1, 2026
Technical Tour: October 2, 2026

The change was made to align with the Technical Tour date.
We apologize for any inconvenience and appreciate your understanding.

What's New

• Jan.	05, 2026:	Full paper template is available. See File submission page. NEW!
• Nov.	28, 2025:	Abstract submission deadline has been extended to Dec. 31, 2025.
• Nov.	20, 2025:	Plenary Speakers page.
• Oct.	10, 2025:	The meeting schedule has been adjusted. See avobe.
• Sep.	20, 2025:	Submission of abstract opened. See File submission page.
• Aug.	25, 2025:	Website opened.

Call for Papers

NUTHOS-15 Call for Papers (PDF, 485kB) Oct. 10, 2025: Updated.

About NUTHOS

The 15^th 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.

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~~ December 31, 2025	For details, see File Submission page.
Abstract Acceptance Notification	January 05, 2026
Draft Papers:	February 28, 2026
Final Papers:	June 1, 2026
Early Registration:	Closes in June 2026

Elsevier Index / Special issue in JNST, NED, NT, AITF

Indexing of the NUTHOS-15 proceedings in Elsevier databases (Currently under review).
Special issue of NUTHOS-15 in Journal of Nuclear Science and Technology (JNST), Nuclear Engineering and Design (NED), or Nuclear Technology (NT). Selected contributions on AI and Machine Learning will be considered for publication in the special issue of AI-Thermal Fluids (AITF).