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 “24th International Conference on Radionuclide Metrology and its Applications, ICRM 2025” was held from 19 to 22 May, 2025 in Paris, France, and was hosted by the Laboratoire National Henri Becquerel (LNE-LNHB).

Several ICRM working groups held interim meetings, virtually or in person, in 2026, 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.

The most recent ICRM Low-Level Radioactivity Measurement Techniques Conference, ICRM-LLRMT 2026, was organized by the Low-Level Measurement Techniques Working Group (LLRMT) and hosted by the University of Ottawa in Ottawa, Canada, on September 14-18, 2026.

The ICRM Life Sciences Working Group (LS-WG) meeting on 8–9 June 2026 was hosted by the National Research Council of Canada, in Ottawa, Canada. The Liquid Scintillation Counting Working group (LSC-WG) also met in Ottawa (on 11–12 June). A visit to the NRC laboratories took place during both meetings.

The latest intermediate working meeting of the ICRM Gamma Spectrometry Working Group was held on October 14-15, 2026 and was hosted by the NPL (Teddington, UK).The ICRM Radionuclide Metrology Techniques (RMT) Working Group hosted its interim meeting at the NPL on October 12-13, 2026.