# Radiation Portal Monitor

*Last updated: 2026-06-26*

> Radiation Portal Monitors (RPMs) are fixed scanning systems installed at border crossings, seaports, and freight hubs so that every passing vehicle, container, or pallet is automatically screened for radioactive emissions.

Radiation Portal Monitors (RPMs) are fixed scanning systems installed at border crossings, seaports, and freight hubs so that every passing vehicle, container, or pallet is automatically screened for radioactive emissions. The device measures radiation levels continuously and triggers an alert whenever readings exceed a preset threshold, prompting secondary inspection by trained personnel. In international freight operations, RPMs serve as a frontline tool against illicit trafficking of nuclear and radiological materials, operating in line with IAEA safeguard guidelines. For shippers and forwarders, an RPM alarm means the consignment is held pending investigation—delays can range from hours to days depending on the facility. Portable RPM units complement fixed installations for targeted, intelligence-led controls away from main checkpoints.

**Source:** [https://www.iaea.org/topics/nuclear-security/nuclear-security-systems-and-measures/detection-and-monitoring](https://www.iaea.org/topics/nuclear-security/nuclear-security-systems-and-measures/detection-and-monitoring)

## Quick Facts

| Property | Value |
|---|---|
| Term | Radiation Portal Monitor |
| Language | EN |
| Word count | 115 |
| Last updated | 2026-06-26 |
| Source | https://www.iaea.org/topics/nuclear-security/nuclear-security-systems-and-measures/detection-and-monitoring |

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*Logistics Glossary — Freight Academy: [https://www.freight-academy.com/en/glossary/radiation-portal-monitor](https://www.freight-academy.com/en/glossary/radiation-portal-monitor)*

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