Integrated approach to optimize CAREM 25 nuclear power plant

This paper describe an integrated approach based on probabilistic risk assessments (PRA), operations, tests and maintenance schedules for the CAREM 25 NPP. The focus is on risk regulations and the availability of the plant when the all issues are considered. In this way the human factor is a main issue for the useful of the results. When we take into account the human factor, the availability may be strongly penalty for the human error, because the safety systems are independently from human intervention. The integrated approach developed shows like the balance is possible and some results are discussed. For example the risk is linked with the power plant design at the beginning but during the operation the test activities may raise it. Finally, the option to optimize like a whole (risk and availability) in an integrated approach raises it like a better way to do a global optimization.