Capture of Dismantlement Aerosols using Small-scale Electrostatic Precipitators

Abstract

During nuclear decommissioning processes, aerosols are released into the work environment through decontamination techniques and various cutting processes during dismantling. These aerosols may contain radionuclides posing a radiological hazard to workers or to the environment. Current methods to capture aerosols such as misting or fiber filters are likely to either increase a secondary waste (water) or clog, leading to additional costs. In this paper, electrostatic precipitators (ESPs) are explored as a feasible technology to capture aerosols. The current technology level of ESP is reviewed in comparison to other capture methods and the fundamental concepts appropriate for decommissioning are established. Small-scale laboratory ESPs are used as a proof of concept to capture aerosols. These systems are built from 3D printed components and generic consumer goods to allow for rapid prototyping. The laboratory scale ESPs show that capture of iodine vapors, incense and dust occurs. This results in liquid droplets or surface deposits on the downstream electrodes. Several parameters affect the performance of the ESP including geometric configuration and dust loading. The paper will summarize these effects and propose the next steps in development of an ESP appropriate for decommissioning related activities.