Supply of Mechanical & Electrical (M&E) Equipment for the Water Management Zones (WMZ) at Sizewell C site

Description

This expression of interest (EOI) serves to inform the supply chain about the upcoming procurement for the supply of Mechanical & Electrical (M&E) Equipment for the Water Management Zones (WMZ) at Sizewell C site. 
      
      This equipment supply will be desilting type units to control the suspended solid discharge from the outfalls. These units shall be supplied with the pumps and ancillary equipment necessary to lift the water from the discharge network to the treatment plant and for integrating the pump with the control system. These treatment plants will be primarily used to treat surface runoff water collected via the site drainage network, but also includes emergency potable water discharges and some groundwater dewatering that cannot be practically treated at the main groundwater treatment plant.
      
      This table shows the space requirements, power requirements and source and flow rates for each WMZ treatment plant: 
      
      WMZ / Treatment plant footprint / Treatment flow rate (l/s (m3/hr)) / Power requirement (kW) / Power source
      
      
      WMZ 1	12x6m	23.7 (85.3)	15-20	Generator
      WMZ 2	12x6m	27.6 (99.4)	15-20	Network
      WMZ 3	16x6m	40.7 (147)	35-40	Network
      WMZ 5	12x6m	31.2 (112)	20-25	Generator
      WMZ 7	25x7.5m	62.0 (223)	35-40	Generator
      TMO	25x25m	200 (720)	        TBC	         Generator
      
      The treatment plant is only required to manage total suspended solids (TSS); hydrocarbons are assumed to be trapped in the WMZ and will be removed using booms deployed by client. The concentrations for TSS are as follows:
      
      •	Outfall to the SSSI         60mg/l
      •	Outfall to the sea           250mg/l
      
      pH correction is not included at each WMZ but provision of it might be required on some plants.