The support truss is a welded steel structure intended for fixing the reactor pressure vessel in the concrete cavity. This structure is aimed to protect the reactor against weight and seismic loads. The structure diameter is over nine metres while its mass is 88 tonnes. The installation was performed during one eight-hour work shift. Presently, the structure is being pre-assembled with concreting cavities and mounting of measurement channels.

The thrust truss is also intended for fixing the reactor pressure vessel in the concrete cavity. This is a welded steel structure with a diameter of over seven metres and mass of 27 tonnes. The structure installation that took several hours was preceded by its pre-assembling and welding of its components.

Formerly, the reactor dry containment was installed in the reactor building of power unit 2. This component intended for safety and biological protection weights 142 tonnes. The dry containment ensures reliable performance of the NPP in any emergency situation including earthquakes up to 9.0 magnitude as well as stable operation of ionization chambers, i. e. special measurement channels intended for monitoring the reactor power measurements.

Mounting of the reactor cavity components precedes mounting of the reactor pressure vessel itself. Immediately prior to installation of the pressure vessel, the workers shall install the support ring, which will bear the main weight load from the vessel.

Information and the picture: JSC AKKUYU NUCLEAR

About TITAN-2:

TITAN-2 Holding is a Russian group of companies that build nuclear power facilities. Branch organisations of the Holding run the full cycle of works ranging from development of design documentation for nuclear power facilities to their commissioning.

TITAN-2 Holding acts as the General Contractor responsible for construction of the new power units of the Leningrad NPP. Organisations of the Holding perform all civil, installation, and electric installation works at the construction site.

The Holding is the Main Contractor for construction of the Hanhikivi 1 NPP, Finland. and of the Akkuyu NPP, Turkey, being a party of T2IC Russian and Turkish joint venture.