The first tier of the inner steel containment has been installed for Unit 3 of the Leningrad 2 nuclear power station on the Gulf of Finland in Russia, state nuclear corporation Rosatom said.

The unit, Leningrad 2-3, will be a VVER-1200 pressurised water reactor with a net capacity of 1,150 MW. Construction began in March 2024.

The inner containment is designed to preserve hermetic conditions during reactor operation and prevent radioactive leakage into the environment in the event of an emergency.