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 "22^nd 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 proceedings of ICRM 2019 have been published and select articles are available electronically on ScienceDirect free of charge until 10 March 2021. Additional papers have been published in the Proceedings Part II in the ICRM Technical Series on Radionuclide Metrology, ISSN 2522-4328.

The next (23^rd) ICRM conference (ICRM 2023), organized by the Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH) in Bucharest, Romania, will be held 27-31 March 2023 in Bucharest. The contact person of the local organizing committee is Aurelian Luca. The conference will include formal oral and poster presentations, along with working group meetings to offer a less formal opportunity for scientific discussions. More details are available on the ICRM 2023 conference website.

The General meeting was held on-line on 15 June 2021. All members had received additional information by e-mail prior the meeting.

The ICRM Low-Level Measurement Techniques working group held its previous 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 latest Low-Level Radioactivity Measurement Techniques conference (ICRM-LLRMT 2020 Conference, postponed to 2022 due to the COVID-19 pandemic) was a five-day meeting hosted by the INFN-LNGS at the Gran Sasso National Laboratory in Italy, 2-6 May 2022 (https://icrm2022.lngs.infn.it); proceedings are planned to be published on-line by Applied Radiation and Isotopes before the end of 2022.

Several ICRM working groups held interim meetings virtually in 2020 and 2021, 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. For details, contact the Working Group coordinators.

An ICRM Life Sciences working group meeting was held virtually on 17-18 September 2020, and the ICRM Liquid Scintillation Counting working group meeting, originally scheduled for 14-15 September, was held by WebEx 25-26 January 2021. The ICRM working groups “Nuclear Decay Data” and “Beta Spectrometry” met on 27 October 2020 via Zoom; the Gamma-Ray Spectrometry working group also met virtually on 29-30 October 2020 (preliminary agenda). The ICRM Radionuclide Metrology Techniques (RMT) working group was to have met virtually on 28 October 2020. For further information please refer to the respective coordinators listed on the Working Group pages.

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