News/Events

60th Anniversary of the TRIGA Reactor

Apr 29, 2026 | Event, News

The TRIGA research reactor is celebrating its 60th anniversary of operation this year. Over the past six decades, it has become one of Slovenia’s key research and educational infrastructures and an important hub of knowledge in the fields of nuclear technology,...

Open Day at the Jožef Stefan Institute – TRIGA Reactor

Mar 28, 2026 | Event, News

On Saturday, 28 March 2026, the TRIGA reactor hosted an Open Day as part of the 34th Jožef Stefan Days. Approximately 800 visitors attended the event and had the opportunity to learn more about the operation of the research reactor and its supporting infrastructure....

34th Jožef Stefan Days at the TRIGA Reactor

Feb 25, 2026 | Event, News

On Saturday, 28 March 2026, the TRIGA reactor will host an Open Day as part of the 34th Jožef Stefan Days, taking place from 23 to 28 March 2026 at the Jožef Stefan Institute.

Presentation of the Reactor Infrastructure Centre (TV IJS)

Oct 21, 2024 | News, Video recording

As part of presentations of the infrastructure programmes of the Jožef Stefan Institute, Dr Anže Jazbec, Head of the Reactor Infrastructure Centre, presented the operation of the RIC, its research equipment, and its activities. The video is available at this link.

Visit to the TRIGA Reactor for Members of the Chamber of Craft and Small Business of Slovenia

Aug 22, 2024 | Event, News

In cooperation with the Chamber of Craft and Small Business of Slovenia, a professional visit to the TRIGA research reactor at the Jožef Stefan Institute was organised. Participants became acquainted with the operation of the Reactor Infrastructure Centre and...

Call for Applications within the OFFERR Project (EURATOM-funded)

Mar 22, 2023 | News

A call for applications within the OFFERR project – for access to research infrastructure – will open on 3 April 2023. More information is available in the PDF document and in the online brochure.

Award Ceremony for Renewed Licences of TRIGA Reactor Operators

Mar 7, 2023 | News

Fire Drill at the Reactor

Dec 7, 2022 | News

On Tuesday, 6 December, a fire drill was conducted at the Reactor Centre of the Jožef Stefan Institute. In addition to the Institute staff, the exercise involved teams from the Ljubljana Professional Fire Brigade, the Ecological Laboratory with Mobile Unit (ELME), and...

Filming of the Movie Chain Reaction (“Lančana reakcija”) at Our Reactor

Oct 28, 2022 | News

Between 19 and 23 October, our reactor hosted a film crew that shot several key scenes for the movie Chain Reaction ("Lančana reakcija"). The film is a co-production between Serbian and Slovenian production companies and tells the story of how the 1958 reactor...

“Train the Trainers” Course

Sep 6, 2022 | News

From 5 to 7 September, the TRIGA reactor hosted six trainees from six different European countries. They attended a course (“Train the Trainers” Course) organised within the ENEEP platform, intended for professors and teaching assistants in nuclear technology. The...

Reactor Tank Inspection

Jul 26, 2022 | News

During the week from 25 to 29 July, we hosted experts from the company Q Techna, who carried out an inspection of the reactor tank. A similar inspection was previously performed in 2011, enabling comparison of the results. The reactor tank was inspected using a camera...

Neutron Detection Course for Students of Aix-Marseille University

Jun 28, 2022 | News

The reactor is hosting ten students from the French Aix-Marseille University. Between 22 June and 1 July, they will perform nine different practical exercises focused on neutron detection. A calorimetric measurement exercise will be carried out for the first time as a...

e-SiCure

Jun 2, 2022 | News

During the week from 30 May to 3 June, we hosted a group of researchers from Croatia, Japan, Portugal, and Slovenia collaborating on the e-SiCure 2 project. The aim of the project is to continue the development of SiC neutron detectors. Irradiations are being carried...

CEA/I-tech and JSI Research Campaign

May 24, 2022 | News

A research campaign took place between 16 and 25 May. In cooperation with the Reactor Physics Department (F8) at JSI, CEA performed neutron dose measurements using dedicated foils. Based on the results, they will validate the MCNP and Tripoli computational models of...

Visit of GEN energija

May 20, 2022 | News

Today, 20 May, approximately 40 representatives of the company GEN energija visited our facility as part of an organised excursion. During their visit, they toured the control room, the reactor platform, and the Hot Cells Facility.

ENEEP Course

Feb 18, 2022 | News

During the week from 14 to 18 February, as founders of the ENEEP platform, we hosted trainees from various faculties across the European Union. One of the courses was held at the Reactor Centre in Brinje. Participants performed practical exercises through which they...

Pulse Campaign in Cooperation with CEA

Jan 20, 2022 | News

From 17 to 28 January, we hosted a researcher from CEA. Together with the Reactor Physics Department, pulse experiments were carried out.The aim of the research campaign was to determine the response of neutron detectors during rapid reactor power transients. More...

Course for Students of Uppsala University

Oct 1, 2021 | News

From 28 September to 1 October, we hosted students from Uppsala University. In recent years, this has become a traditional course held during the last week of September. This year, students were once again able to attend in person, as the current COVID-19 situation...

Calorimetric Measurements at the TRIGA Reactor

Jul 22, 2021 | News

This week we hosted researchers Damien and Hubert from CEA Cadarache. Together, we performed calorimetric measurements to observe how different materials heat up due to radiation in the central irradiation channel at different reactor power levels. Such measurements...

Aix-Marseille University in a Virtual Course

Jul 8, 2021 | News

On 7 and 9 July, we hosted students from Aix-Marseille University. Due to the well-known travel restrictions between countries, the course was held virtually. On Wednesday, we organised a virtual tour of the TRIGA reactor, while on Friday we conducted the exercise...

Nuclear Reaction Just Outside Ljubljana – Already 55 Years (Siol.net)

May 26, 2021 | News, Video recording

In a video report published by Siol.net, the presenters explore the operation of the TRIGA research reactor. Experts explain the basic operating principles of the reactor, safety mechanisms, and radioactive waste management, while also discussing the role of nuclear...

Pulse No. 500 Performed

May 25, 2021 | News

As part of testing a Čerenkov radiation detector, our TRIGA reactor produced pulse No. 500 today. Pulse parameters: Peak power: 15.5 MW Released energy: 1.3 MWs Highest measured fuel temperature: 193 °C

TRIGA Reactor Featured in “From the Couch Outdoors”

May 25, 2021 | News, Video recording

The programme “From the Couch Outdoors” began airing on Siol.net, in which entertaining hosts Aleš and Igor Novak take viewers through hidden and lesser-known corners of Slovenia. In the second episode, they also visited our TRIGA reactor. You can watch the feature at...

Virtual Tour of the TRIGA Research Reactor

May 13, 2021 | News, Video recording

For several months, normal life has been disrupted due to measures preventing the spread of COVID-19. At the TRIGA reactor, we were forced to cancel all group tours of our laboratory, including school visits. Every year, nearly 1,500 Slovenian pupils visit us. To...

Nuclear Reactor in Ljubljana – Science Among Books

May 17, 2018 | News, Radio show

In the podcast Znanost na cesti (“Science on the Street”), Assist. Prof. Luka Snoj from the Jožef Stefan Institute presented the operation of the TRIGA research reactor and its role in modern scientific research. You can listen to the programme at this link.

Visit of Students from the Massachusetts Institute of Technology (MIT), USA, to the TRIGA Reactor, 26–30 March 2018

Apr 6, 2018 | Event, News

Students and professors from the Massachusetts Institute of Technology (MIT) visited the TRIGA reactor, where they performed experimental exercises and validated advanced computational models. Owing to its design, TRIGA is exceptionally well suited for education and...

Challenges of Modern Nuclear Technologies (Val 202)

Apr 5, 2018 | News, Radio show

Val 202 broadcast an episode of Frekvenca X addressing current challenges in nuclear energy. Slovenian experts and researchers from MIT discussed technology development, the importance of simulations, and the role of the TRIGA research reactor in education and...

MIT Physicists Visit the TRIGA Reactor (Radio Prvi)

Apr 3, 2018 | News, Radio show

Radio Prvi prepared a feature on the visit of American students and professors from MIT, who attended a course in experimental reactor physics at the TRIGA reactor. The report highlights the guests’ enthusiasm for the research infrastructure and the importance of...

Name of the Week: Assist. Prof. Luka Snoj on the 50th Anniversary of the TRIGA Reactor (Val 202)

Jun 5, 2016 | News, Radio show

Assist. Prof. Luka Snoj, head of the TRIGA nuclear reactor, operated under the auspices of the Jožef Stefan Institute for 50 years, was selected as Name of the Week. In the Val 202 programme, Assist. Prof. Snoj highlighted the importance of the reactor for the...

50 Years of the TRIGA Reactor at the Jožef Stefan Institute

Jun 1, 2016 | News

The Jožef Stefan Institute celebrated the 50th anniversary of the TRIGA reactor, which achieved first criticality in 1966 and marked the beginning of the nuclear era in Slovenia. More about the anniversary, the reactor’s history, and highlights from the ceremony can...

TRIGA Reactor Marks 50 Years of Operation (STA)

May 31, 2016 | News

The Slovenian Press Agency (STA) reported on the 50th anniversary of the first self-sustaining chain reaction in the TRIGA reactor at the Jožef Stefan Institute. The article highlights its key role in educating personnel for the nuclear energy sector and its...

50 Years of the TRIGA Reactor (Frekvenca X, Val 202)

May 31, 2016 | News, Radio show

The programme Frekvenca X on Val 202 prepared a feature on the 50th anniversary of the TRIGA reactor. Experts presented its development, exceptionally safe design, and importance for research, medicine, and education. The programme also highlighted the reactor’s role...

Feature on the 50th Anniversary of the TRIGA Reactor in the Dnevnik Programme (TV Slovenia 1)

May 31, 2016 | News, Video recording

Television Slovenia reported on the 50th anniversary of the TRIGA reactor in its main news programme Dnevnik. The feature presents its historical significance, development, and role in scientific and technological progress in Slovenia. You can watch the feature at...

Radiation Resistance Testing of Electronics at the TRIGA Reactor (Delo)

May 31, 2016 | News

On the occasion of the 50th anniversary of the TRIGA reactor, the newspaper Delo reported on research activities performed at the reactor, including radiation resistance testing of electronic components. TRIGA collaborates with international research institutions,...

Slovenian Nuclear Reactor Celebrates 50 Years of Operation (Finance)

May 31, 2016 | News

Today marks exactly 50 years since the first self-sustaining chain reaction in the TRIGA reactor at the Jožef Stefan Institute. The Reactor Centre plays a key role in educating personnel for the Krško Nuclear Power Plant. On the occasion of the anniversary, a...

50 Years Since the First Nuclear Reaction in Podgorica (24UR)

May 31, 2016 | News, Video recording

24UR reported on the 50th anniversary of the first nuclear reaction in Podgorica near Ljubljana. The report presents the important contribution of the TRIGA reactor, which operates as a neutron source for numerous research activities. You can watch the video report at...

TRIGA Reactor Marks 50 Years of Operation (preberi.si)

May 31, 2016 | News

The portal preberi.si reported on the 50th anniversary of operation of the TRIGA reactor at the Jožef Stefan Institute. The article highlights its role in educating personnel for the Krško Nuclear Power Plant and its broader importance for basic science. You can read...

Half a Century of Nuclear Energy in Slovenia (Intelekta, Radio Slovenia)

May 24, 2016 | News, Radio show

The programme Intelekta on Radio Slovenia’s First Programme prepared an in-depth feature on the development of nuclear energy in Slovenia on the occasion of the 50th anniversary of the TRIGA reactor. The programme presents historical milestones, the importance of...

50 Years of the TRIGA Reactor in Podgorica (Prvi na obisku, Radio Slovenia)

May 19, 2016 | News, Radio show

Radio Slovenia featured the Reactor Centre in Podgorica in the programme Prvi na obisku on the occasion of the 50th anniversary of the TRIGA reactor. The programme offers insight into its operation, research activities, and its role in education and the development of...

TRIGA Reactor Featured in National Geographic

Mar 30, 2015 | News

In March 2013, the Reactor Infrastructure Centre at the Jožef Stefan Institute hosted a photography team preparing a feature for the Slovenian edition of National Geographic. The article presented lesser-known yet exceptionally interesting locations in Ljubljana,...