Calculation codes
IRSN has developed numerous calculation codes for nuclear safety and radiation protection. You will find below a list describing some of them.
Nuclear safety
Below you will find a list of tools used by Cacul in the field of nuclear safety.
![ASTEC-5.png](https://admin.en.irsn.fr/sites/en/files/styles/default/public/2024-02/ASTEC-5.png?itok=Qy2srkKB)
The ASTEC software system
The ASTEC (Accident Source Term Evaluation Code) software system simulates all the phenomena involved in a core meltdown accident in a water-cooled reactor, from the initiating event to the release of radioactive products (known as the "source term") outside the containment