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Avantech - Model RWRO -Radwaste Reverse Osmosis System
A VANTech `s patented Rad waste Reverse Osmosis (RWRO) System revolutionizes liquid radwaste processing in Pressurized Water Reactors (PWRs). This system decontaminates even hard-to-process water (such as water from outage or from sluicing spent primary resin) to near minimum detectable amounts (MDA) in a single pass.
RWRO achieves high decontamination factors (DFs) by establishing a physical barrier between the plant and environmental outfall. Unlike the chemical barrier created by ion exchange resin, the RO membrane barrier remains constant, regardless of the quality and chemistry of the influent.
The key to the patented RWRO™process is reordering the process configuration.
The RWRO™ puts the ion exchangers upstream of the RO. In that position, ion exchange resin captures a high fraction of the radioactive contaminants from the process stream, leaving the RO membranes to make high quality water. Upstream ion exchange protects the RWRO™ from building up excessive dose, reduces the activity in the reject stream, and allows the reject to be returned to the plant`s LRW system for reprocessing. The low activity concentration in the RWRO™ reject prevents a buildup of activity in the plant radwaste system and eliminates the need for secondary processing of the reject stream by drying or solidification.