Defense-in-depth concept


The AKKUYU NPP project is being implemented in accordance with the protection-in-depth concept, which is based on the whole technology of NPP safety. The main feature of the protection-in-depth concept is the use of multiple layers of physical barriers and protective restrictions within each level (tier) to check the impact of hardware failures and human errors. Compliance with the concept guarantees protection of the environment, population and staff.

The protection-in-depth system is designed to perform the following functions:


- emergency shutdown of the reactor and maintaining it in a subcritical state;
- emergency transfer of heat from the reactor and the spent fuel pool;
- retention of radioactive substances within the protective barriers;
- maintaining the integrity of protective barriers.