The International Atomic Energy Agency (IAEA) has launched the ConvEx-3 (2025) full-scale exercise, a comprehensive 36-hour drill designed to rigorously test global readiness and coordination in response to nuclear or radiological emergencies. Held every five years, these exercises simulate a real-time crisis in a member state to evaluate emergency communications, decision-making, and international collaboration under the framework of two key conventions — the Convention on Early Notification of a Nuclear Accident (Early Notification Convention) and the Convention on Assistance in the Case of a Nuclear Accident or Radiological Emergency (Assistance Convention).
During the exercise, participating countries and agencies simulate protective measures such as evacuation protocols, distribution of iodine tablets, public outreach, medical response coordination, and management of food and trade restrictions based on radiological data. This realistic scenario ensures that every facet of emergency preparedness—from national response to international assistance—is thoroughly assessed.
A critical component of ConvEx-3 is the activation of the IAEA’s Incident and Emergency Centre (IEC), alongside the testing of advanced communication and data exchange platforms, including the Unified System for Information Exchange in Incidents and Emergencies (USIE) and the International Radiation Monitoring System (IRMS) platform. These systems are essential for timely, transparent information sharing and coordinated global response.
Romania, host of the 2025 exercise, carries a significant role given its geographic location bordering five countries and home to the Cernavodă nuclear power plant, situated just 160 kilometres east of Bucharest near the Black Sea. Romania last hosted such a global exercise in 2005.
Cantemir Ciurea-Ercău, President of Romania’s National Commission for Nuclear Activities Control (CNCAN), emphasized the importance of the exercise:
“Hosting ConvEx-3 is both a responsibility and an opportunity for Romania. In today’s interconnected world, effective preparedness must transcend borders—this exercise reflects our shared commitment to safety, cooperation, and transparency.”
IAEA Director General Rafael Mariano Grossi highlighted the exercise’s significance in strengthening global nuclear safety and security:
“This exercise is a clear demonstration of the international community’s commitment to protect people and the environment by working together, across borders and systems, when every minute counts.”
ConvEx-3 (2025) underscores the collective effort required to respond effectively to nuclear or radiological emergencies, fostering enhanced cooperation among nations and reinforcing mechanisms that save lives and protect the environment.