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Installation of key components of the core catcher for Unit 4 of Leningrad NPP Phase II completed

The under-construction Unit 4 of Leningrad NPP Phase II has recently reached a key engineering milestone: the engineering team of the general contractor TITAN-2 successfully positioned and secured the maintenance platform and cantilever truss of the core catcher (the core passive safety system molten core retention device) precisely in the reactor shaft. The two large components weigh 78 tonnes and 148 tonnes respectively. Following the installation of the first batch of components (the catcher vessel and internal filler materials) in the summer of this year, another breakthrough has been achieved in the assembly of large structures for this core safety facility. As the core barrier of the defense-in-depth system of the Generation III+ pressurized water reactor (VVER-1200), the core catcher is mainly used under severe accident conditions...

2026-10-25

First concrete poured for turbine building foundation of Unit 3 VVER-1200 at Leningrad NPP Phase II

On September 9, 2026, concrete pouring began for the foundation of the turbine building of Unit 3 VVER-1200 at Leningrad NPP Phase II in Russia. Construction workers have completed the pouring of the central section of the future foundation, with concrete consumption approaching 5,000 cubic meters. This pour is the first stage of construction of the foundation structure for this building. According to the plan, the contractor will use nearly 5,000 tonnes of rebar and more than 20,000 cubic meters of high-strength concrete to build a monolithic foundation slab 2.5 meters high and more than 8,000 square meters in area. The related operations are currently being carried out simultaneously in 7 construction zones. Konstantin Khudyakov, head of the Leningrad NPP project at TITAN-2 Holding (TITAN-2), said that the foundation construction of the turbine building places high demands on concrete quality, pouring technology and curing conditions, especially in the first few days after pouring, when it is necessary to focus on controlling on-site temperature and humidity and preventing mechanical damage. After the concrete reaches design strength, the contractor will, together with the owner, use non-destructive testing methods to inspect the structure, including ultrasonic testing; at the same time, specimens made from the same batch of concrete will also be subjected to compressive tests on a hydraulic press to confirm that the foundation is capable of bearing the loads of walls, floors, piping and large operating equipment.

2026-09-10

Moscow Cable Company Shield to Supply 4 km of Busbar Trunking for Units 3 and 4 of Leningrad NPP Phase II

Moscow Cable Company (Shield) will supply four kilometers of transmission lines for the Leningrad Nuclear Power Plant. The company will manufacture 10 kV and 24 kV generator voltage transmission lines for Units 3 and 4 of Leningrad NPP Phase II. These transmission lines meet the highest reliability and safety requirements of the nuclear industry and are equipped with current transformers and voltage transformers produced by Cable Shield Company. The transmission lines will be manufactured at the enterprise in the city of Kovrov, where new production capacity for cable trays was built last year. Currently, the plant's annual production capacity reaches 12,000 meters of cable trays. According to statistics, over 400,000 meters of transmission lines produced by the company have been put into operation...

2026-08-04

Unit 4 of Leningrad NPP Phase II completes installation of first major equipment

Unit 4 of Russia's Leningrad NPP Phase II recently completed the installation of the core melt catcher vessel. This is the first major equipment of the unit to enter the installation stage, and also the first passive safety system equipment to be installed. The steel structure weighs 157 tonnes, and the installation was carried out using a heavy crawler crane, taking about one work shift of approximately 8 hours, nearly 3 months ahead of the original schedule. Valery Zhemchugov, Acting Director of Leningrad NPP, stated that the installation of the core melt catcher vessel is a key milestone in the construction of Unit 4, a VVER-1200 pressurized water reactor unit, and that the relevant work was completed in accordance with quality requirements, providing more time for subsequent reactor building civil and installation works.

2026-07-31