INAC 2026 – International Nuclear Atlantic Conference

The International Nuclear Atlantic Conference (INAC 2026) will take place from August 24 to 28, 2026, at the Escola de Guerra Naval (EGN), in Rio de Janeiro, Brazil. Organized by the Brazilian Nuclear Energy Association (ABEN), INAC is recognized as the largest and most important event in the nuclear sector in Latin America, bringing together professionals from academia, industry, government, and research institutions from Brazil and abroad.

The first edition of the International Nuclear Atlantic Conference (INAC) was held in 2001. Since then, the conference has been organized every two years by the Brazilian Nuclear Energy Association (ABEN), becoming the largest and most important nuclear event in Latin America. For more than 25 years, INAC has served as a leading forum for technical exchange, professional networking, and institutional collaboration in the nuclear sector.

Under the theme “Nuclear Energy: Atoms for a Green Future,” INAC 2026 will provide an environment for the exchange of knowledge, technical discussions, and the strengthening of partnerships in areas related to nuclear energy and its applications in energy generation, health, agriculture, industry, environment, and technological innovation. The conference also contributes to the development of human resources and to the advancement of safe and sustainable nuclear technologies.

The technical program includes a set of traditional and well-established meetings that reflect the diversity of the nuclear field:

• the XXIV Meeting on Reactor Physics and Thermal Hydraulics (ENFIR)

• the XVII Meeting on Nuclear Applications (ENAN)

• the IX Meeting on Nuclear Industry (ENIN)

• the XI Junior Poster Technical Sessions, dedicated to undergraduate students

• the XII ExpoINAC, the technical and commercial exhibition of the conference

In addition, INAC 2026 will host the Nuclear Ambassadors Award, an initiative promoted by ABEN to encourage communication and public engagement on the benefits and peaceful uses of nuclear technology. The award recognizes students, professionals, and educators who contribute to increasing public understanding of nuclear science and its role in sustainable development.

INAC has established itself as an important platform for knowledge exchange, professional development, and collaboration across the nuclear community. The conference continues to play a key role in supporting innovation, strengthening cooperation, and promoting the safe and responsible use of nuclear technology.

We look forward to welcoming participants to Rio de Janeiro for an engaging and productive event.

Maria de Lourdes Moreira - (Chair) INAC 2026

XXIV ENFIR - Meeting on Reactor Physics and Thermo-hydraulics

The XXIV ENFIR, a bi-annual gathering of the nuclear reactor community in Brazil, is set to take place in 2026. We are excited to announce that this event will be hosted alongside the International Nuclear Atlantic Conference (INAC2026) in the vibrant city of Rio de Janeiro from August 24 to 28, 2026.

This traditional meeting will bring together leading researchers and nuclear professionals from both national and international institutions. The program promises to be rich in compelling technical discussions, covering a diverse array of topics, from nuclear reactor physics to innovative reactor technologies.

For the XXIV ENFIR 2026 edition, the technical program will feature engaging roundtable discussions, enlightening lectures, and insightful plenary sessions presented by renowned national and international experts in the field. Additionally, there will be opportunities for both oral and poster presentations of contributed papers.

Participants are kindly encouraged to submit extended abstracts of their original and unpublished research, contributing to the advancement of knowledge in the following áreas:

R01 Nuclear Reactor Physics, Advanced Nuclear Reactors

R02 Nuclear Reactor Thermal Hydraulics, Reactor Safety Analysis, Nuclear Reactor Licensing and Regulation

R03 Applied Mathematics and Computation, Computational Fluid Dynamics

R04 Artificial Intelligence and Virtual Reality, Nuclear Reactor Instrumentation and Control, Man-Machine Interface

R05 Structural Mechanics, Nuclear Reactor Fuel Fabrication and Design, Fuel Cycle Management and Services

R06 Nuclear Power Plant Viability, Design, Construction, and Operation, Environmental Impact Applied to Nuclear Reactors and Fuel Cycle

R07 Nuclear Security

Full papers of the accepted extended summaries presented at the meeting are welcome for consideration for publication in a special issue of the Brazilian Journal of Radiation Science (BJRS) dedicated to INAC 2026, provided they meet BJRS review standards.

Join us at XXIV ENFIR 2026 as we gather to exchange ideas, share knowledge, and collaborate on the forefront of nuclear reactor research.

Stay tuned for further details on the conference, registration, and submission guidelines. We look forward to your participation in this exciting event!

Claubia Pereira - (Chair) XXIV ENFIR

Frederico Antonio Genez - (Co-chair) XXIV ENFIR

IX ENIN - National Nuclear Industry Meeting

Nuclear technology continues to demonstrate its vital role in delivering clean and reliable electricity, while also supporting other industrial applications worldwide. It has become one of the most important solutions for improving quality of life and advancing a more decarbonized energy mix—contributing to a healthier planet.

Across the globe, climate organizations and government energy planners are increasingly recognizing the importance of nuclear energy as a key component in building a sustainable, low-carbon future and a resilient green economy.

The IX Nuclear Industry Meeting will focus on analyzing the progress made in achieving key objectives for this desired greener future, through keynote sessions, expert roundtables and technical presentations. This event offers a unique opportunity to exchange knowledge, build connections, and engage with both seasoned experts and emerging professionals. Participants will gain valuable insights into the latest trends in nuclear technology, plant operations, new reactor developments, licensing challenges, and more.

We warmly invite you to join us and be part of this dynamic international gathering.  The IX ENIN technical areas are:

I01.Energy Generation: Advances in new nuclear power plants programs and deployment

I02. Planning, Economics, and Financial Strategies for new nuclear projects

I03. Nuclear Fuel Cycle Industry and the Uranium Market

I04. Social Impact, Public Engagement, and Knowledge Management for nuclear programs

I05. Nuclear Safety and Security, Non-Proliferation, Safeguards, Nuclear Forensics, Radiological Protection, and Safety Culture

I06. Human Resources and Workforce Development for the future of nuclear technologies

I07. Emerging Trends in business models for the deployment of Small Modular Reactors (SMRs) and Microreactor applications

We look forward to welcoming you to this exciting event in Rio de Janeiro.

João da Silva Gonçalves - (Chair) IX ENIN

Edson Kuramoto - (Co-Chair) IX ENIN

XI Junior Poster - Junior Poster Technical Sessions

The National Undergraduate Research Program aims to inspire and empower undergraduate students to enter the world of scientific research, actively contributing to the creation of knowledge under the guidance of experienced researchers.

More than supervisors, these researchers serve as mentors and educators, directly strengthening teaching and research in higher education. The program seeks to spark scientific vocations, identify emerging talent, and prepare participants for graduate studies—driving the renewal and expansion of the nation’s workforce in the nuclear sector.

The 1st INAC Undergraduate Research Exhibition was held in person during INAC 2005, in Santos. The event was a landmark success, fostering meaningful exchanges between students and researchers while showcasing the latest advances presented at Brazil’s largest nuclear conference.

In this edition, the XI INAC Undergraduate Research Exhibition (XI JPoster) will be held in person during INAC 2026.

Submissions must fall within the specific areas defined by the events: ENFIR, ENAN, ENIN.

Submission is exclusively open to undergraduate students who are authors of the work, with mandatory co-authorship by their academic advisors.

Join us and be part of the future of nuclear science in Brazil!

Ricardo Barros - (Chair) XI Junior Poster

Graciete S. de Andrade e Silva - (Co-Chair) XI Junior Poster

Leonardo S. de Andrade e Silva - (Co-Chair) XI Junior Poster

IV Nuclear Ambassadors Award 

The Nuclear Ambassadors Competition, a program of the Brazilian Nuclear Energy Association (ABEN), aims to expand public awareness of nuclear technology and its benefits, promoting education and increasing the number of people who understand the importance of developing the nuclear sector in the country.
During a specific session at INAC 2026, the winning groups of the fourth edition of the competition will be recognized in the undergraduate, graduate, and faculty categories. Participants will give short presentations of their work, followed by the award ceremony and the presentation of certificates.

Olga Mafra - (Chair) IV Nuclear Ambassadors Award

Inaya Lima - (Co-Chair) IV Nuclear Ambassadors Award

To submit your extended abstract, you must create an account for the event.

INAC 2026: 08/24/2026 to 08/28/2026

KEY DATES
● Opening of extended summary submission: April 14, 2026.
● Extended summary submission deadline: May 15, 2026.
● Deadline for the reviewer reports: June 05, 2026.
● Deadline for revised paper submission: July 03, 2026.

Flyer

INAC 2026 Flyer

Templates

INAC 2026 extended summary template in MS Word

Contat us:

INAC: inac@aben.org.br
XIV ENFIR: enfir2026@aben.org.br
XVII ENAN: enan2026@aben.org.br
IX ENIN: enin2026@aben.org.br
XI JUNIOR POSTER: jposter2026@aben.org.br