Feed back experience shows that there is in Europe a need for Workshops which are neither a big congress nor a collection of working groups with lots of different meetings, but which over a few days provide a forum for a few dozen experts to exchange feedback experience and to identify problems that need further research or development. Therefore the Network has organised and will continue to organise such type of Workshop once a year.
The subject is selected in order to cover domains where the Network Steering Committee Group estimates that many improvements in terms of ALARA implementation may be found. All papers are invited presentations. To promote discussions, appropriate time is made available for work in small groups and the number attending the workshop is limited to a few dozens experts. The language of the Workshops is English.
At the end of each Workshop the chairpersons and the working groups propose to the participants some recommendations to the EC and national regulatory bodies and other stakeholders corresponding to the feedback from the sessions of the Workshop. These recommendations are validated by the Network Steering Committee Group and send to the Commission and to other appropriate stakeholders.

  1. "ALARA and Decommissioning", Saclay, France, December 1997
  2. "Good Radiation Practices in Industry and Research", Chilton, UK, November 1998
  3. "Managing Internal Exposure", Neuherberg, Germany, November 1999
  4. "Management of Occupational Radiological and Non-radiological Risks: Lessons to be Learned", Antwerp, Belgium, November 2000
  5. "Industrial Radiography: Improvements in Radiation Protection", Rome, Italy, October 2001
  6. "Occupational Exposure Optimisation in the Medical and the Radiopharmaceutical Sectors", Madrid, Spain, October 2002
  7. "Decommissiong of Installations and Site Remediation", Arnhem, The Netherlands, October 2003
  8. "Occupational Radiological Protection Control through Inspection and Self-assessment", Uppsala, Sweden, September 2004
  9. "Occupational Exposure to Natural Radiation", Augsburg, Germany, October 2005
  10. "Experience and new Developments in Implementing ALARA in Occupational, Patient and Public Exposures", Prague, Czech Republic, 12-15 September 2006
  11. "ALARA in Radioactive Waste Management", Athens, Greece, 9-11 April 2008
  12. "ALARA issues arising for Safety and Security of Radiation Sources and Security Screening Devices", Vienna, Austria, 21-23 October 2009
  13. "ALARA and the Medical Sector", Oscarborg Fortress, Norway, 7-10 June 2011
  14. "ALARA in existing exposure situations", Dublin Castle, Ireland, 4-6 September 2012
  15. "Improving ALARA Culture through Education and Training", Rovinj, Croatia, 7-9 May 2014
  16. "ALARA in Industrial Radiography", Bern, Switzerland, 14-16 March 2016
  17. "ALARA in Emergency Exposure Situations", Lisbon, Portugal, 15-17 May 2017
  18. "ALARA for Decommissioning and Site Remediation", Marcoule, France, 11-13 March 2019
  19. "Innovative ALARA Tools", Athens, Greece, 27-29 November 2019
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WHY THIS TOPIC? — The International Commission on Radiological Protection system of protection is based on three fundamental principles: justification, optimisation and dose limitation; they apply to three types of situations of exposure to ionising radiations: (those that can be) planned, (in case of) emergency and existing (from sources that already exist when decisions to control them are made) along with three categories of exposures: occupational (i.e. workers), medical patients and the public (ICRP, 2007, ICRPedia).

Radon and NORM (naturally occurring radioactive materials) exposures have been categorized by ICRP as existing exposure situations (ICRP 2014; 2016; Lecomte, 2016; ICRP, 2019). However, both types of sources present specificities, making the choices about the type of exposure situation and the categories of exposure somewhat challenging and areas of confusion [Cool, 2013]. In some circumstances (for example in [Euratom, 2013]), radon and NORM are considered as planned exposure situations and exposure controlled as such. ICRP has recognized that further clarity is needed on the interpretation of exposure situations [Clément, 2021].

ICRP has insisted that the optimisation principle is a systematic process that apply irrespectively of the exposure situation: fundamentally, the exposure of the individuals should always be kept ALARA below certain dose criteria, be it called “reference level” or “dose constraint” depending on the case. Nonetheless, the protection strategy should be designed based on the characteristics of the situation and the circumstances of the exposure and a graded approach might be appropriate.

The application of the optimisation principle is the cornerstone of the activities of the European ALARA Network. Furthermore, the EAN also aims to assist ICRP in the practical implementation of its recommendations and to monitor the development of the new general recommendations [EAN, 2021], as a Special Liaison Organisation.

OBJECTIVE — The EAN would like to examine how the optimisation principle has been applied in the case of NORM and radon (at workplace or in other circumstances) and whether the choices of exposure type and exposure categories affect the practical implementation of ALARA.

A webinar will be organised to present an overview of experiences and discussed if the elements of the optimisation process could be influenced by the type of exposure situation/categories of exposure:

  • Selection of the appropriate dose criteria (dose constraint, reference level);
  • Dose assessment;
  • Identification of the protective options and selection of the best option;
  • Implementation, monitoring of exposure and iteration.

PROGRAMME. — The programme of the webinar is available: here.


  • The participation to the webinar is free of charge and will be held on Zoom or Teams
  • The webinar will not be recorded.
  • Interested individuals needs to register: here.
  • Registration is the opportunity to send questions/topics you would like to see discussed during the round table
  • Participant might use the chat to ask question for the Round table.
  • A synthesis of the presentation and discussion will be produced and published on the EAN website. ◼︎


Clement, 2021. Keeping the ICRP recommendations fit for purpose, C. Clement et al. 2021 Journal of Radioogical Protection 41 1390.
Cool, 2013. Review of the ICRP system of protection: the approach to existing exposure situations, D. A. Cool, March 2015, Annals of the ICRP 44(1 Suppl).
EAN, 2021. European ALARA Network Strategic Agenda 2021-2026.
Euratom, 2013. Council Directive 2013/59/Euratom of 5 December 2013 laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation, Official Journal of the European Union, L 013, 17 January 2014.
ICRP, 2007. The 2007 Recommendations of the International Commission on Radiological Protection. ICRP Publication 103. Ann. ICRP 37(2–4).
ICRP, 2014. Radiological Protection against Radon Exposure. ICRP Publication 126. Ann. ICRP 43(3). 
ICRP, 2019. Radiological protection from naturally occurring radioactive material (NORM) in industrial processes. ICRP Publication 142. Ann. ICRP 48(4).
ICRPedia, http://icrpaedia.org/Exposure_Categories_and_Situations, June 2019.
Lecomte, 2016.J. F. Lecomte, Understanding existing exposure situations. Annals of the ICRP 2016 45:1_suppl, 54-63.