• collecting information about a nuclear accident
• performing analysis and consequence assessment
• preparing expert bases related to the countermeasures implementation
• preparing expert bases for accurate and timely informing of the public

TSC is formed of seven members, one of them acting as a leader. Each member has a substitute, which enables TSC to stay operational as long as it is needed. Members and their substitutes are being appointed by the State Office Director. The present structure of the TSC is made up of experts from the National Protection and Rescue Directorate, the Meteorological and Hydrological Service, the Institute "Ruder Boškovic", the Faculty of Electrical Engineering and Computing and the Faculty of Science of the University of Zagreb, the firm ENCONET and the State Office for Nuclear Safety itself.

Most of the TSC’s tasks are performed with a help of specialized computer tools. Software package INTERRAS is an example of relatively simple tool, while on-line system RODOS represents very sophisticated applications. The main sources for all necessary input data are the following:

• Croatian Early Warning System for nuclear accidents (CEWS)
• notification and data exchange systems for nuclear and radiological accidents ECURIE and ENATOM
• supporting institutions from Croatia, most important being the Meteorological and Hydrological Service
• institutions from the neighboring countries (cooperation regulated by the bilateral agreements)
• radiological data exchange system EURDEP

The TSC operates according to the procedures brought together in the TSC operating manual. The manual is based on Croatian regulations and on the best international practice. In development of the manual, special attention has been paid to the recommendations from the European Commission and the International Atomic Energy Agency in Vienna (IAEA). The procedures described in the manual are continuously exercised during the internal drills, as well as during the international exercises.