Performance Characteristics of the Portable Thyroid Monitoring System

131I is radionuclide of major concern under a nuclear reactor accident, and it will be concentrated in the thyroid of the exposed people for at least a brief period after inhalation. The ability to screen large numbers of people who may internally contaminated with 131I will be necessary so that medical intervention can be employed if needed. Considering the time constraint imposed under emergency situations and the potential size of population demanding thyroid monitoring, a large number of efficient thyroid monitors should be prepared beforehand. Therefore, the portable thyroid monitoring system to be used for the estimation of intake of 131I in a nuclear emergency was developed in NREMC. After construction of the thyroid monitoring system, performance characteristics of the system were evaluated in this study