Management of stormwater and groundwater generated during construction phase of large-scaled industrial facility - case Hanhikivi-1, nuclear power plant
Gribanova, Irina (2022)
2022
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-202202072180
https://urn.fi/URN:NBN:fi:amk-202202072180
Tiivistelmä
Stormwater runoff formation in industrial areas during construction is a significant factor of hydrosphere pollution. To prevent and mitigate the contamination of the environment, it is important to organize the stormwater management system on construction sites.
The development of a stormwater and groundwater management system during the construction phase is considered by the example of Hanhikivi-1 nuclear power plant. While developing the stormwater management system, one of the challenges was reviewing the existing stormwater system units as settlings pounds in terms of the ability to collect and convey wastewater in case of rain of varying intensities. This thesis considers the issues of organization stormwater management, including dewatering of the pit for the main building and structures Hanhikivi-1 NNP in compliance with environmental regulation and requirements. The significant part of this thesis was to check the existing ponds for simulation of flooding during rain with different intensity and repeatability and to adjust the capacity of general units of the designed stormwater system to prevent the flooding of the main pit above -17,0 m elevation.
As a tool for simulation of rain with different intensity occurs in considered area of Hanhikivi-1 NPP was used the Implicit Solver (Sewer GEMS Dynamic Wave) of Bentley software. The system was computed for different design cases: 5, 10, 50, 100 years return period rain. As a result of computing the stormwater, a management system was developed and the general parameters of the main units were defined as follows: the capacity of pumps, the dimensions of the designed pond, the routing of the roadside ditches, and the cross-sections of the ditches
The development of a stormwater and groundwater management system during the construction phase is considered by the example of Hanhikivi-1 nuclear power plant. While developing the stormwater management system, one of the challenges was reviewing the existing stormwater system units as settlings pounds in terms of the ability to collect and convey wastewater in case of rain of varying intensities. This thesis considers the issues of organization stormwater management, including dewatering of the pit for the main building and structures Hanhikivi-1 NNP in compliance with environmental regulation and requirements. The significant part of this thesis was to check the existing ponds for simulation of flooding during rain with different intensity and repeatability and to adjust the capacity of general units of the designed stormwater system to prevent the flooding of the main pit above -17,0 m elevation.
As a tool for simulation of rain with different intensity occurs in considered area of Hanhikivi-1 NPP was used the Implicit Solver (Sewer GEMS Dynamic Wave) of Bentley software. The system was computed for different design cases: 5, 10, 50, 100 years return period rain. As a result of computing the stormwater, a management system was developed and the general parameters of the main units were defined as follows: the capacity of pumps, the dimensions of the designed pond, the routing of the roadside ditches, and the cross-sections of the ditches