- Volume 42 Issue 3
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Gamma-ray Exposure Rate Monitoring by Energy Spectra of NaI(Tl) Scintillation detectors
- Lee, Mo Sung (Department of Laser & Optical Information Engineering, Cheongju University)
- Received : 2017.08.04
- Accepted : 2017.09.17
- Published : 2017.09.30
Background: Nuclear facilities in South Korea have generally adopted pressurized ion chambers to measure ambient gamma ray exposure rates for monitoring the impact of radiation on the surrounding environment. The rates assessed with pressurized ion chambers do not distinguish between natural and man-made radiation, so a further step is needed to identify the cause of abnormal variation. In contrast, using NaI(Tl) scintillation detectors to detect gamma energy rates can allow an immediate assessment of the cause of variation through an analysis of the energy spectra. Against this backdrop, this study was conducted to propose a more effective way to monitor ambient gamma exposure rates. Materials and Methods: The following methods were used to analyze gamma energy spectra measured from January to November 2016 with NaI detectors installed at the Korea Atomic Energy Research Institute (KAERI) dormitory and Hanbat University. 1) Correlations of the variation of rates measured at the two locations were determined. 2) The dates, intervals, duration, and weather conditions were identified when rates increased by
Supported by : Daejeon Metropolitan City
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