Argentine authorities are investigating the disappearance of a capsule containing Cesium-137 in a medical institute in the city of Rosario, province of Santa Fé. The episode resulted in the issuing of a national alert due to the radioactive properties of the material, used in the calibration of nuclear medicine devices.
The disappearance was detected last Tuesday, during a routine check carried out by technicians from the medical center. When accessing the storage location of the radioactive source in one of the equipment, the professionals found that the capsule was no longer in the protected area.
According to the Nuclear Regulatory Authority (ARN), the source was stored in a lead-shielded container, specifically designed to contain radiation. The material is used to test and calibrate devices used in nuclear medicine examinations and treatments.
After confirming the disappearance, the ARN immediately activated the Radiological Emergency Intervention System (SIER). The agency also notified national security bodies, such as the Federal Emergency Agency and specialized divisions of the Argentine Federal Police.
Investigation seeks to identify those responsible
The investigations prioritize the review of the medical institute’s internal controls and the mapping of who was allowed to enter the storage zone. According to local press reports, only a limited group of professionals had authorization to access the site.
Investigators also examine entry and exit records, internal documents and security camera recordings. The objective is to establish the exact moment of the disappearance and identify those responsible for removing the capsule.
Among the lines of investigation are possible failures in security protocols or unauthorized removal by someone who had access to the institute’s facilities.
Authorities warn of risks
Experts indicate that the risk to the population remains low as long as the capsule remains intact within the lead shield. The main concern only arises if there is damage or opening of the protective container.
In an official statement, the Nuclear Regulatory Authority advised that no one should attempt to handle any object similar to that described. The agency reinforced the need to avoid any direct contact.
“Although the radiological risk is very low, if you find it, do not touch or handle it”, warned the agency in a note.
Cesium-137 is a radioactive isotope used in various medical, scientific and industrial applications. It emits beta and gamma radiation, which requires strict storage and transport protocols.
The biggest concern, according to technicians, involves the eventual encounter by people without knowledge of the content. If the shielding is breached, continued exposure can cause burns, damage to internal organs, bone marrow problems and increased long-term risk of cancer. The case rekindles memories of the tragedy in Goiânia, in 1987, when the same material caused large-scale contamination in Brazil after inadequate handling.
Argentine authorities remain mobilized to recover the capsule and investigate the circumstances of the incident. Any information about the whereabouts of the material must be immediately passed on to nuclear safety and control bodies.
