project

Marine hydraulic structures surveys of a nuclear power plant construction

Siting & Permitting Nuclear Turkey

Context and challenges

In May 2010 Russia and Turkey signed an intergovernmental agreement (IGA) to construct four VVER 1,200 MW (total capacity : 4,800 MW) reactors in Akkuyu at the Mediterranean coast of Turkey. The expected cost of the project is 20 billon USD and it will be the first nuclear power plant project that will be constructed with the build, own and operate (BOO) model.
For this nuclear power plant project, one of the most important and crucial structures are the marine hydraulic structures including water intake and discharge structures together with a port. It is necessary to determine the soil parameters and soil profiles under the foundations, in order adapt the structures features and minimize risks. Due to the need of cooling water for the operation of nuclear power plants, detailed hydrological surveys are crucial.
A major construction company managing large infrastructure projects has been appointed for the EPC of these structures.

In this context, this client has appointed Assystem to perform site surveys required for the detailed design and construction of the marine hydraulic structures of the nuclear power plant.

Project Scope

  • Survey including offshore-onshore drillings, to understand the geological structure of the power plant site
  • Geotechnical tests, measurements related to engineering properties of geological units :
    - CPT (Cone Penetration Test)
    - SPT (Standard Penetration Test)
    - Pressuremeter Tests, etc.
  • PS Suspension Logging, to complete the geological studies and provide information for the physical conditions of the site
  • Video recording of the seabed under the facilities with ROV (Remote Operating Vehicle)
  • Laboratory tests (soil and rock)

Results

  • Geological-geotechnical data collected with the tests have been used to define the design and the construction of offshore hydraulic engineering structures as well as the dedicated port:

    - Water intake structure
    - Breakwater and shore protection structures
    - Cargo terminal
    - Water distribution chamber and the discharge line units

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