International Committee for Radionuclide Metrology (ICRM)

Collected images of radionuclide applications in health and envionment The International Committee for Radionuclide Metrology (ICRM) is an association of radionuclide metrology laboratories whose membership is composed of delegates of these laboratories together with other scientists (associate members) actively engaged in the study and applications of radioactivity. It explicitly aims at being an international forum for the dissemination of information on techniques, applications and data in the field of radionuclide metrology. This discipline provides a range of tools for tackling a wide variety of problems in numerous other fields, for both basic research and industrial applications. Radionuclide metrology continues to play an important role in the nuclear industry, supporting activities such as radionuclide production, nuclear medicine, measurement of environmental radioactivity and of radionuclides in food and drinking water, decommissioning of nuclear facilities, nuclear security and emergency preparedness, nuclear physics research, etc.

Plenary meetings of the ICRM are held biennially and have developed into scientific ICRM conferences, a successful instrument of communication among various specialists, truly encouraging international co-operation. The most recent in the series of ICRM meetings, the "22nd International Conference on Radionuclide Metrology and its Applications, ICRM 2019" was held from 27 to 31 May 2019 in Salamanca, Spain and hosted by the University of Salamanca. The major part of the proceedings of ICRM 2019 are to be published as a special on-line issue of Applied Radiation and Isotopes in 2020 (hard-copy publication will be in regular issues of ARI throughout the year), and additional papers will be published in the Proceedings part II in the ICRM Technical Series on Radionuclide Metrology, ISSN 2522-4328.

The next (23rd) ICRM conference will be organized by the Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH) in Bucharest, Romania from from 31 May – 4 June 2021. The contact person of the local organizing committee is Aurelian Luca ( The conference will include formal oral (which may extend to noon on the 28th) and poster presentations, along with working group meetings to offer a less formal opportunity for scientific discussions. More details will be available on the ICRM 2021 conference website, which is planned to be launched in July 2020.

The ICRM Low-Level Measurement Techniques working group held its last ICRM - Low-Level Radioactivity Measurement Techniques conference, ICRM-LLRMT 2016, in Seattle (USA) 26-30 September 2016, hosted by the Pacific Northwest National Laboratory (PNNL). Proceedings were published as special issue of Applied Radiation and Isotopes Vol. 126 (August 2017). The next Low-Level Radioactivity Measurement Techniques conference (ICRM-LLRMT 2020 Conference, postponed to 2022 due to the COVID-19 pandemic) will be a five-day meeting hosted by the INFN-LNGS at the Gran Sasso National Laboratory in Italy, 2-6 May 2022 (; abstracts will be due on the conference website late in 2021.

Several ICRM working groups held interim meetings in 2018, which offered ample opportunity to discuss technical details of specific sub-fields of radionuclide metrology more informally. ICRM member institutions are strongly encouraged to give young researchers the possibility to participate in such interim meetings. Consecutive meetings of the Liquid Scintillation Counting and Life Sciences working groups were held at the VNIIM in St. Petersburg, Russia in the first full week of June 2018, followed by a workshop (14 June 2018) of the Gamma-Ray Spectrometry WG in Paris to discuss actions concerned with the evaluation of detection efficiency, coincidence summing and the application of corresponding calculation codes. Another joint workshop of the Nuclear Decay Data, Beta-Spectrometry and RMT working groups together with a DDEP (Decay Data Evaluation Project) meeting at NIST was held at the NIST in September 2018. For details, contact the Working Group coordinators.

The ICRM Liquid Scintillation Counting Working Group meeting that had been originally scheduled for 14-15 September has been postponed and might be held at the end of January 2021; an update will be made as soon as possible. The ICRM Life Sciences WG meeting was held virtually on 17-18 September 2020 (0900 UTC to 1600 UTC); for further information please contact the coordinator Jeffrey Cessna ( The DDEP will meet on 26 October, followed by meetings of the ICRM WGs “Nuclear Decay Data” and “Beta Spectrometry” on the 27th; all meetings will take place between 1400 and 1800 CET (1300 to 1700 UTC) by Skype or equivalent. For the two ICRM WG meetings, time is available for short presentations (~10 min); please contact the organizers ( and if you wish to make a presentation as well as to confirm participation in the meetings. The ICRM Radionuclide Metrology Techniques (RMT) working group will meet virtually on 28 October 2020 from 1000 to 1600 UTC; registration was requested before 1 October 2020. The Gamma-Ray Spectrometry working group will also meet virtually, in two separate sessions on 29 and 30 October 2020 from 1100 to 1400 UTC (please refer to the preliminary agenda); registration was requested before 5 October 2020.

Note: This information is made available through the National Institute of Standards and Technology (NIST) facilities. However, the views expressed and the decisions reported do not necessarily connote NIST agreement with, or endorsement of them. Further, NIST does not endorse any commercial products that may be mentioned. Any comments that you provide by e-mail or by submitting an on-line form may be sent to members of the ICRM who may not follow the same NIST privacy practices.

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Online: January 2001   -   Last update:    October 2020