An inner containment is a primary element of a reactor facility confinement, with its height being 61.7 meters and the wall thickness being 1.2 meters. With such parameters, there is no chance for radioactivity to get outside of the construction during the power block operation.

'The process of concreting the 1st power block’s inner reactor containment upper circle will run in three stages taking into account the complexity of the construction and the scope of preparatory activities’, Aleksey Buldygin, the head of capital construction management at the Kursk NPP elaborated on the specifics of the technology process. ‘Stage 1 will be initiated at the plus 9.100 meters mark. We plan to sue 730 cubic meters of concrete, and the work should be completed in 50 hours. Following that, we will take a number of steps for concrete curing, the goal of which is to facilitate suitable temperature and humidity for concrete to gain in strength’.

‘Delivering on the key stages of the 1st power block construction in a timely manner and with proper quality is a result of great synergy between the general contractor, the subcontractors, and the customer. While staying within the schedule, we also stick to the top priority for the nuclear power specialists, which is safety’, Alexey Deriy, the Vice President and the project director of the Kursk NPP construction at JSC EC "ASE".

The first stage of concreting is due to be completed early November 2019. Once the concrete is strength-ened, the second stage will commence, which will pre-suppose concreting from +12.600 meters mark. The third stage will cover the area from +16.900 to +22.500 meters marks. All concreting activities for the upper circle are to be completed in March 2020.