Contamination

Exposed and unsealed radiation sources has a risk of contaminating areas outside the controlled area. A scenario with widespread contamination means both a radiation protection risk as well as a major financial impact. Sensitive instruments providing early warnings of the presence of surface contamination help to prevent inadvertent transfer of radioactivity. The surface contamination is measured or as ’counts per second’ or as activity per unit area [Bq/cm²] for specified radio nuclide. These values could be subject to regulatory limits.