| Summary: | 碩士 === 元培醫事科技大學 === 醫學影像暨放射技術系碩士班 === 105 === Optically Stimulated Luminescence Dosimeter (OSLD) Compared to the more commonly used thermal luminescence dosimeters (TLDs), the OSLD does not require heating, easy maintenance, high sensitivity and is suitable for repeated verification of the dose .In this study, OSLD were installed at fixed points around the Kuosheng Nuclear Power Plant over two seasons to assess the environmental background radiation dose. Subsequently, the experimental and control groups were designed. The dosimeters were placed in black plastic shells that blocked external light sources and were distributed across 12 locations at the selected environmental radiation monitoring station. The dosimeters in the experimental group were subjected to extinction for reuse after repeated readings of the cumulative dose, whereas those in the control group were used after a single cumulative dose reading. Readings of the previous doses were deducted and used as the actual dose, and the experimental results of the two groups were compared and documented. The documented values were then substituted into the equation for the lower limit of detection, and the average of its result achieved the required lowest detection limit. The experimental results illustrated slight differences in some of the detection points, although the overall average was similar; the influence of various high uncertainties was determined as a possible cause. Therefore, if the hardware aspects of the instruments were adjusted or multiple measurements were taken, together with the performance of multiple analyses, to reduce various potential uncertainties, the method could be applied to monitor environmental background radiation doses
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