PRIMER DOZA 2026 Exercise

06.10.2026

The F-2 Department, ELME, and SVPIS organized the 13th intercomparison measurements of dose rate, PRIMER DOZA, on Wednesday, September 30, 2026, at the JSI Reactor Centre. The exercise is intended for organizations and individuals from Slovenia and abroad that carry out radiation practices or operate in the field of protection against ionizing radiation and emergency preparedness. The purpose of this exercise is to enable organizations and individuals from Slovenia and abroad, who perform various measurements with dose rate meters, to test their knowledge and equipment in various tasks related to the detection of radioactive sources, exchange experiences, and upgrade their knowledge and working procedures through the mutual comparison of results.

The first set of tasks in the exercise included dose rate measurements in the field of a Cs-137 source with an activity of approximately 2 GBq, which participants performed with handheld meters at various distances from the source, as well as the measurement of the natural background dose rate. The second set of tasks involved searching for sources hidden in barrels. The third set of tasks comprised mapping the dose rate at measuring points within a designated area with simulated radioactive contamination, created by sources hidden on the ground. The fourth set involved calculating the activity of americium Am-241 by measuring the dose rate at a selected distance from the source. In the fifth set of tasks, participants had to use dose rate measurements to first calculate the position of an unknown source inside a horizontally placed pipe, and then, using additional measurements with a lead plate for shielding, also estimate which source it was. A large number of easier and more difficult tasks required intensive and focused work from the participants, some calculation skills, and a certain degree of improvisation.

This year as well, the intercomparison measurements of dose rate were organized separately from the intercomparison measurements of radioactive source activity using gamma spectrometry. The measurements were attended by more than 70 representatives from approximately 20 different organizations from Slovenia, Austria, Croatia, and the Czech Republic. The exercise participants included: JSI, Ames, ARAO, DEHI RKB, FURS, GB Ljubljana, GB Koper, GARS Jesenice, PGE Celje, PGE Velenje, PGD Kamnik, the Special Police Unit, the Slovenian Armed Forces, RKB Celje, RKB EHI, Landespolizeidirektion Kärnten from Austria, EKOTEH, IMI and IRB from Croatia, and SURO from the Czech Republic.

6. october 2026

PRIMER DOZA 2026 Exercise

On Wednesday, September 30, 2026, the 13th intercomparison measurements of dose rate, PRIMER DOZA, took place at the JSI Reactor Centre, attended by more than 70 representatives from approximately 20 domestic and foreign organizations. Through five different sets of practical tasks, the exercise participants tested their knowledge and equipment, contributing to the exchange of experience and the improvement of working procedures in the field of radiation protection.

6. august 2026

The Article in Plant Physiology Journal

Interesting publication by F2 department colleagues - the study investigates how tea plants detoxify fluoride by using aluminum to restrict fluoride transport and sequester it as aluminum–fluoride complexes in root and leaf epidermal tissues.

9. june 2026

European Parliament Member Matej Tonin Visits the Microanalytical Centre (MIC)

During his visit to the Jožef Stefan Institute’s Reactor Centre, Member of the European Parliament Matej Tonin was introduced to research activities in the fields of nuclear technologies, robotics, and artificial intelligence. Dr. Primož Pelicon presented the research conducted at the ion accelerator facility and its extensive international collaborations, while Mr. Tonin expressed his admiration for the Institute’s achievements and research infrastructure at the conclusion of the visit.