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Webinar on Overview of Approaches for Management of Nuisance Alarms from Radiation Portal Monitors


Date and Time

Wednesday, 19 May 2021

09:00 AM Vienna, Austria time

Register here →


Radiation Portal Monitors (RPMs) have been installed around the world at points of entry and exit to monitor contents of vehicles/containers passing through them to prevent and detect illicit trafficking in nuclear and other radioactive material out of regulatory control. Due to the sensitivity of the RPMs, radiation alarms can often be triggered by innocent shipments simply transporting commercial cargoes that contain radionuclides of natural origin. When this happens, it is called a “nuisance alarm”.  Nuisance alarms can create operational and logistical difficulties and various techniques have been developed to manage nuisance alarms. The choice of a technique should be based on a thorough understanding of the positives and negatives of the technique, balanced against threat, operational, and policy needs. This webinar will provide an overview of the various approaches that can be used to manage nuisance alarms.


The objective of the webinar is to provide an overview of techniques used for managing nuisance alarms from Radiation Portal Monitors (RPMs). Additionally, the webinar will introduce opportunities for States to further enhance their own approaches for nuisance alarms and address current and planned safety and security guidance.


Opening session: Overview and Objectives

Mr Charles Massey, Nuclear Security Officer, Nuclear Security of Materials Outside Regulatory Control Section, Division of Nuclear Security, IAEA

Issues with nuisance alarms on RPMs

Mr Julian Hill, Countering Weapons of Mass Destruction Office, Department of Homeland Security, USA

General approaches to reducing nuisance alarms      

Mr. Khalil Boudjemline, Science and Engineering Directorate, Canada Border Services Agency, Canada

Evaluation of nuisance alarm reduction techniques/systems

Mr Jonathan Friedman, National Coordinator Megaports, Customs and Excise, Federal Public Service Finance, Belgium

Application for the optimization of RPM operation in the Republic of Korea

Mr Jaekook Lee, Senior Researcher, Korea Institute of Nuclear Safety, Republic of Korea

IAEA Radiation Safety Guidance Applicable to Trade in Commodities and NORM          

Mr Hari Pappinisseri Puthanveedu, Radiation Protection Specialist, Radiation Protection Unit, Radiation Safety and Monitoring Section, Division of Radiation, Transport and Waste Safety, IAEA

Q&A and Conclusions

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