Main Control Room HVAC Inlet Location Optimization to Improve Control Room Habitability Under Postulated Accident Conditions

Abstract

As part of the Point Lepreau Refurbishment Project, an emergency filtering unit will be installed on the Main Control Room make-up air system to ensure habitability of the Main Control Room is maintained following an accidental atmospheric release. This enhancement has provided an opportunity to relocate the existing make-up air inlet in an effort to minimize intake of radioactive by-products and loading of the filter bank. Atmospheric dispersion calculations were performed at radioactivity release points based on local historical weather data to estimate plume dispersion. This paper presents the results of this study and summarizes the improvement of operator dose uptake during the specified occupancy period.