National Physical Laboratory

Radiation Protection

Radioactivity-in-air calibration
The rig used at NPL for calibrating
radioactivity-in-air monitors

Ionising radiation has many applications, ranging from nuclear medicine to the nuclear power industry.

This project is concerned with the radiation protection of workers and of the general public. It includes the provision of primary standards for radioactivity in air, including a new standard for the growing field of Positron Emission Tomography.

Airborne radioactivity is a hazard to people working with radioactivity and also to the general public.

Included in this project is the provision of primary standards of man-made gaseous radionuclides (3H, 85Kr and 133Xe) and re-establishing a regular supply of primary standards of radon (radon is a naturally-occurring radioactive gas; it contributes approximately half of the total radiation dose to the general public). These standards underpin the calibration of all the radioactivity-in-air monitors in the UK.

The adoption of best practice will be encouraged through the Airborne Radioactivity Monitoring Users Group and the publication of a Measurement Good Practice Guide for the relevant instrumentation.

Last Updated: 25 Apr 2014
Created: 14 Jun 2007


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