Custom Engineered Systems –
Outage Wastewater Treatment
AVANTech provides complete treatment solutions that can be easily and cost-effectively integrated into custom facilities. Wastewater treatment usually requires multiple process components including filtration, adsorption and ion exchange. The EPV, or pressure vessel based filter-demineralizers, are well suited to outage type applications because they can be quickly mobilized and demobilized, and can serve all these process functions.
|Example 1||Example 2|
Wastewater generated as a result of maintenance and overhaul activities. Impurities include miscellaneous solids from cleaning activities, radionuclides generated by fission and activation, organics from sump flushing and colloidal radionuclides from sluice water associated with ion exchange media sluicing. The goal of the liquid waste treatment system is to reduce organic and radionuclide concentrations to a value acceptable for release. This goal is accomplished by installing 4 EPV's with filtration media, granular activated carbon (GAC), cation and macroreticular anion resin. The filtration vessel removes suspended solids, as well as filterable radionuclides. The GAC vessel removes organics, as well as colloidal radionuclides. The cation vessel removes soluble radionuclides, such as Co-60, Sr-90 and Cs-137, and the macroreticular resin polishes colloidal radionuclides that are able to migrate through the upstream vessel, such as Co-5B, Co-60, Ag-110m and Sb-125.
The purpose of this system is to return rinse water to a quality that would be acceptable to reuse. This client had decontaminated and then replaced some of the components in a reactor system. Prior to refueling the reactor, the system had to meet cleanliness criteria. To prevent the generation of large amounts of wastewater, the EPV system is installed. The system consists of four vessels containing activated carbon, cation, anion and mixed bed resin. The system is capable of producing very high purity water that met reuse criteria. Water from rinsing operations is recirculated through the 4-vessel system and back to the reactor until the cleanliness criteria is met and thereafter for pool maintenance.