Akkuyu Unit 4 Pit Construction Has Begun

Earthmoving preparations for the construction of Unit 4 are underway at the site of Akkuyu NPP, the first nuclear power plant in Turkey. The works are carried out in accordance with the Limited Work Permit (LWP) issued by the Nuclear Regulatory Authority of the Republic of Turkey on June 30, 2021.

Akkuyu siteExcavation work will aim for a depth of 12.5 meters and include the removal of almost 600 thousand cubic meters of soil. The work encompasses preparation for for the construction of the reactor building, the turbine hall, the auxiliary reactor building, and other main facilities of Unit 4.

Pit construction works include excavation of rocky soil, as well as the development of drainage water disposal. Currently, over 20 units of construction machines are involved in the worksite including excavators, dump trucks, and drilling rigs.

“This year, we expect to receive the construction license for Unit 4 and begin full-scale construction works on the unit early next year. By the end of the year, the construction of the concrete blinding of the reactor and turbine buildings foundation slabs will begin, and afterward the reinforcement of the slabs will be made,” said Sergei Butckikh, Akkuyu Nuclear JSC First Deputy CEO - Director of the Akkuyu NPP under construction.

Butckikh, Akkuyu called the project “a unique case in the history of the global nuclear industry.”

“NPP will become the world's largest nuclear construction center, where four power units will be being built simultaneously. Simultaneous construction of four power units of the NPP will require high concentration of resources, but we are fully prepared for this,” he said.

While tons of earth will be removed steps are being taken to increase soil strength. To accomplish this, a water-cement mixture is pumped into the soil massif, and in some areas the jet grouting method is used. A stream of cement mortar is pumped into the soil under high pressure, which creates pile massifs that provide the required bearing capacity of the soil, and therefore the safety and stability of the buildings and structures being erected in accordance with international standards.

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