Radioactivity services

Environmental radiation

Assessing the performance of the radioactivity measurement community in the UK

These exercises started in 1989, with the increase in public concern about radioactivity in the environment, particularly after the Chernobyl accident. The aim was to assess the performance of the radioactivity measurement community in the UK. More recently, participation in the exercises has become an important aspect of UKAS accreditation in this field. The exercises are run on an annual basis by NPL.

The samples are dispatched to the participants, who are given approximately four months to analyse the samples and submit the results to us.


The 2018 Environmental Radioactivity Proficiency Test Exercise (PTE 2018) is now complete and the final report NPL Report IR 56 is now available.

The results of PTE 2018 will be presented at the next UK National Conference on Applied Radiation Metrology (CARM 2019) at NPL in January 2020. Further details of CARM 2019 will be announced soon.

Should you have any feedback regarding the operation of PTE 2018 please contact the NPL Corporate Assurance Team – Quality.

Note that reports on previous exercises are also available.

If you have any enquiries regarding other radioactivity standards and services, please follow the links below.

Radioactive Standards and Services

Detector Calibration

Don’t see what you are looking for? Our diverse skill set enables us to provide bespoke solutions. Please contact us to discuss your requirements.

Contact us

Work with us

Our research and measurement solutions support innovation and product development. We work with companies to deliver business advantage and commercial success.
Contact our Customer Services team on +44 20 8943 7070