Total Effective Dose Analysis in Case of LOCA for TMI-2 Nuclear Power Plant

Abstract

The TMI-2 power plant, a pressurized water reactor, had 93.1 metric tonnes of fuel stocked in 177 fuel assemblies that were enclosed in the core, with a maximum fuel burnup of 55,000 MWd/MTU intended. This paper will present an assessment of individual and collective doses around TMI-2 site during the Loss of Coolant Accident (LOCA). The radioactive release during accident was extracted for the gaseous forms. The HOTSPOT health physics computer code used to calculate the atmospheric dispersion of radioactive material during LOCA conditions. This codes use a Gaussian dispersion air transport plume model to simulate the atmospheric dispersion of radionuclides in different atmospheric stability classes, wind speeds and directions. Data collected near the reactor site is also analyzed and applied to meteorological data on atmospheric stability conditions, wind speed, and the frequency distribution of wind direction. The results showed the maximum Total Effective Dose Equivalent (TEDE) values for the general public and workers in the vicinity of the TMI-2 site. This will allow the regulatory bodies to implement essential safety measures to protect the employees and the general public.