According to an official report from the General Administration of Customs Office, Dalian Zhoushuizi International Airport Customs recently intercepted a radioactive "amulet" pendant carried by a passenger. Upon re-inspection by on-site officers, the pendant was found to contain Thorium-232 (Th-232), registering at 1,686 times above the local background radiation level. Extensive research has classified Thorium-232 as a Group 1 carcinogen by the World Health Organization, posing significant health risks when worn in close proximity to the body. This detection averted a potential public health threat and demonstrated the effectiveness of China's advanced customs inspection capabilities.
The successful identification was accomplished using Shanghai Ergodi Instruments' RJ34 series handheld Radionuclide Identification Device (RID). This sophisticated equipment integrates advanced LaBr3/NaI (low-potassium) scintillation detectors with proprietary digital T-shaped filter forming technology. The RJ34 series provides comprehensive solutions for customs environments, delivering precise environmental dose equivalent measurements, rapid radioactive source localization, and accurate nuclide identification for both natural and artificial radionuclides. Its deployment at border checkpoints has proven instrumental in preventing missed detections and false alarms, establishing a critical first line of defense against nuclear threats.
While the RJ34 RID excels at targeted inspections of personal belongings and cargo, customs authorities increasingly rely on a multi-layered detection architecture for comprehensive coverage. Radiation Portal Monitors (RPM) serve as the primary screening infrastructure at ports and airports, automatically scanning entire vehicles, containers, and passenger flows for radioactive anomalies. Shanghai Ergodi's vehicle channel RPM systems employ large-volume plastic scintillator panels or high-pressure helium-3 tubes, capable of detecting even shielded nuclear materials in high-traffic environments. These portal systems operate continuously, generating real-time alerts that trigger secondary inspections using handheld devices like the RJ34 for precise nuclide analysis.
This integrated approach—combining wide-area RPM screening with targeted RID verification—creates a robust defense-in-depth strategy. The RPM's high sensitivity ensures no suspicious passage goes unnoticed, while the RJ34's advanced spectrometry capabilities provide the forensic detail necessary for accurate threat assessment and regulatory compliance. At Dalian Zhoushuizi Airport, this synergy proved essential: an initial RPM alarm during passenger screening prompted officers to deploy the RJ34 for detailed analysis, leading to the discovery of the radioactive amulet.
The RJ34 series has repeatedly validated its practical value in complex customs inspection scenarios across multiple ports of entry. Its stable performance under varying environmental conditions and efficient detection capabilities have made it an ideal component of port radiation risk prevention and control systems. The device's rapid response time and high-resolution spectroscopy enable customs officers to distinguish between legitimate radioactive materials (such as medical isotopes or naturally occurring radioactive material) and genuine threats within seconds, significantly reducing inspection delays while maintaining maximum security.
Shanghai Ergodi continues to innovate in both RID and RPM technologies, incorporating machine learning algorithms to reduce false alarm rates and developing ruggedized designs suited for harsh operational environments. The company's solutions have been deployed at numerous customs checkpoints, border crossings, and maritime ports, providing solid technical support for safeguarding national security. As international trade volumes increase and nuclear security challenges evolve, the combination of intelligent portal monitoring and precise handheld identification represents the gold standard for border radiation detection.
By delivering reliable, field-proven technology that protects both public health and economic vitality, Shanghai Ergodi reinforces its position as a trusted partner in national and global nuclear safety infrastructure. The company's commitment to continuous improvement ensures that customs agencies remain equipped to meet emerging threats with confidence and precision.
Post time: Dec-10-2025