Radioprotection 61-2 | Page 93

162 L. P. Lestaevel et al.: Radioprotection 2026, 61( 2), 156 – 165 Fig. 4. Monitored workers(%), collective dose(%) and average dose( mSv) in 2023.

Table 2. Comparison of some key points on data collection between SISERI, ESOREX, UNSCEAR and ISO 24426.

Data range

SISERI First data: 1957 Report every year

since 2005

Dose intervals for whole body

7 intervals No interval above 20 mSv

* N / A: not applicable.

Fig. 5. Evolution of the number of cases exceeding the annual effective dose limit( 20 mSv) between 2015 and 2023.

between 1 and 8, except in 2016 where no case of dose excess was recorded.

Non-nuclear industry is the second most important activity field in terms of dose exceeding cases( between 1 and 2, except in 2019 and 2021 where no case has been recorded).

Since 2015, only one case of annual effective dose exceeding has been registered in the research activities in 2022 and one case in the nuclear field in 2023.

Through this period, no case of dose exceeding the limits has been recorded in the natural radioactivity exposure field.

4 Comparison between European and international occupational exposure( ESOREX / UNSCEAR)

In the form of aggregated and anonymous data( number of workers monitored, average doses, sectors of activity, etc.), the data from the national SISERI database are sent to the ESOREX platform and to UNSCEAR. The objective is to monitor European and global developments in exposure, compare practices and assess the impact of regulations.

ESOREX in Europe and UNSCEAR on a more international scale are two organizations responsible for the collection of dose records of workers exposed to radiation. ESOREX, the European Study of Occupational Radiation Exposure, focuses on the systematic gathering and analysis of radiation exposure data specific to European workers, employing methods tailored to regional regulations and practices. UNSCEAR operates worldwide, encompassing diverse national standards and practices in its data collection. Table 2 compares some key points on data collection.

4.1 Comparison of methods

The divergence in methods between ESOREX( https:// esorex-platform. org /) and UNSCEAR( UNSCEAR, 2022), such as activity sectors or ranges of annual dose, can lead to inconsistencies in data comparability and interpretation. However, the recent publication of ISO 24426( ISO, 2023) aims to harmonize these data collection methods, ensuring a standardized approach across different regions with different regulatory approaches. Such unification would also promote international collaboration in radiation protection research and policymaking, ultimately contributing to the improved