Rosatom, whose engineering division is the general contractor for the project, said the concreting is “one of the key events” in the construction of the plant.
“We have completed concreting work on the first tier to a height of six metres, with 1,145 cubic metres of concrete laid,” said project spokesman Yury Koshelev.
Rosatom said installation of the main equipment of the reactor compartment will begin in 2020.
There are two Russia-supplied 1,200-MW V-392M pressurised water reactor units under construction at the Rooppur site, about 150 km from the capital Dhaka,
First concrete for Rooppur-1 was poured in November 2017 and for Rooppur-2 in July 2018. A general contract was signed between Russia and Bangladesh in 2015.
According to the International Atomic Energy Agency, Bangladesh, which has a population of 160 million, plans to produce 9% of its electricity from nuclear power and reduce its dependence on fossil fuels by the middle of the next decade.