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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제50권 제6호
발행연도
2018.1
수록면
950 - 956 (7page)

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초록· 키워드

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For complete assessment of inhalation doses of radon and its progeny inside the three main ancientEgyptian tombs in Saqqara, seasonal radon concentrations have been measured by using a new electronicdevice that allows for measurement of real-timeeresolved radon concentrations. Measurements werecomplemented by very fast measurements of thoron concentrations, which turned out to be low. Basedon these measurements, annual residence time inside these tombs and the newest International Commissionon Radiological Protectionerecommended radon dose conversion coefficients or seasonaleffective doses were calculated. The results indicate that workers receive highest annual effective dosesof up to 140 mSv, which exceeds the annual limit of 20 mSv, whereas lower values up to 15 mSv arereceived by guides. In contrast, much lower doses were obtained for one-time visitors of the investigatedtombs. The obtained results are somewhat different but still consistent with those previously obtained bymeans of fixed passive dose meters at some of the investigated places. This indicates that reasonableestimates of the effective dose of radon can be also obtained from short-term radon measurementscarried out only twice a year (summer and winter season). Increasing the ventilation, minimizing theworking times, etc., are highly recommended to reduce the annual effective dose.

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