12th Japan-Korea Symposium on
     Nuclear Thermal Hydraulics and Safety (NTHAS12)

    March 29-31, 2021, Yokohama, Japan

Organizing Committee of NTHAS12 is monitoring the Coronavirus (COVID-19) situation to ensure the health and safety of our meeting and participants, as well as our staff. We will also be monitoring the recommendations from the Ministry of Health, Labor and Welfare, Japan and the World Health Organization (WHO) as the situation progresses.

Due to various uncertainties of the COVID-19 and anticipation for safe travel between Korea and Japan, the NTHAS12 Organizing committee and the Technical Program Committees have decided to postpone the NTHAS12 to March 2021 (from March 29th to 31st, 2021).

Along with the postponement, the key deadlines have been newly changed as described below. New deadline for abstract submission will be October 16, 2020 both for “Extended abstract” and for “Full paper presentation”. If there are any changes to these plans, we will provide updates on this website. Please check back periodically.

What's New

• July 07, 2020: NTHAS12 is postponed to March 2021.
• May 24, 2020: Key deadlines extended!
• May 07, 2020: Simposium Flyer of Student Seminar is added. See Student Seminar page.
• Jan. 27, 2020: Submission of abstract has opened. See File Submission page.
• Jan. 17, 2020: Website opened.

Call for Papers

Call for Papers (Revised: July 07. PDF, 430kB)


Japan and Korea are the two leading countries designing and building up-to-date nuclear power plants in the World. In the hopes to contribute to the nuclear system performance with enhanced safety, the thermal-hydraulics divisions of Atomic Energy Society of Japan and Korean Nuclear Society initiated a biennial symposium program across the sea: Japan-Korea Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS). Since the first symposium (NTHAS1) in Busan, Korea in 1998, NTHAS has provided a unique opportunity to discuss up-to-date technical information and to interact with colleagues from the neighboring countries. The second to ninth meetings were held in Fukuoka (2000), Gyeongju (2002), Sapporo (2004), Jeju (2006), Okinawa (2008), Chuncheon (2010), Beppu (2012), Buyeo (2014), Kyoto (2016) and Busan (2018) with great success in technical quality and number of participants. In 2021, the 12th Japan-Korea Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS12) will be held in Yokohama, Japan. The official language of the symposium is English.

Abstract Submission

Authors should submit their abstracts of 400 to 500 words by October 16, 2020 through the symposium website. The Technical Program Committee will referee the submitted abstracts and select the papers to be presented at the symposium. Authors will be notified of selection by October 30, 2020. Draft papers will be required by November 30, 2020, for review.
(See File Submission page.)

Key Deadlines

 Abstract submission October 16, 2020
 Notification of abstract acceptance October 30, 2020
 Draft paper submission for review November 30, 2020
 Notification of paper acceptance December 25, 2020
 Final paper submission January 22, 2021