CAJ | 학술논문

目的通过参加国际比对,提高222Rn和220Rn累积测量的水平,保证测量的质量.方法将本实验室的LD-P型222Rn-220Rn探测器寄往日本放射线医学综合研究所(National Institute of Radiological Science,NIRS),参加222Rn-220Rn累积探测器的国际比对.222Rn比对在NIRS的标准222Rn室进行,按暴露量分低、中、高3个水平；220Rn比对在NIRS的220Rn室进行,也分低、中、高3个水平.暴露结束后将探测器寄回本实验室进行蚀刻、分析,然后把测量结果报给NIRS,最后NIRS将暴露的参考值反馈回本实验室.结果 LD-P探测器222Rn比对测量低、中、高3个暴露水平的测量值与参考值的相对偏差(RPD)分别为-13.8％、-14.4％和-17.1％;220Rn比对测量低、中、高3个暴露水平的测量值与参考值的RPD分别为-14.4％、8.9％和-3.2％.结论本次比对LD-P探测器222Rn和220Rn的测量结果均在NIRS规定的RPD为20％的一级标准范围内.
목적 통과삼가국제비대,제고222Rn화220Rn루적측량적수평,보증측량적질량.방법장본실험실적LD-P형222Rn-220Rn탐측기기왕일본방사선의학종합연구소(National Institute of Radiological Science,NIRS),삼가222Rn-220Rn루적탐측기적국제비대.222Rn비대재NIRS적표준222Rn실진행,안폭로량분저、중、고3개수평；220Rn비대재NIRS적220Rn실진행,야분저、중、고3개수평.폭로결속후장탐측기기회본실험실진행식각、분석,연후파측량결과보급NIRS,최후NIRS장폭로적삼고치반궤회본실험실.결과 LD-P탐측기222Rn비대측량저、중、고3개폭로수평적측량치여삼고치적상대편차(RPD)분별위-13.8％、-14.4％화-17.1％;220Rn비대측량저、중、고3개폭로수평적측량치여삼고치적RPD분별위-14.4％、8.9％화-3.2％.결론 본차비대LD-P탐측기222Rn화220Rn적측량결과균재NIRS규정적RPD위20％적일급표준범위내.
Objective To guarantee the quality of measurenents with the radon-thoron discriminative detectors of our laboratory.Methods LD-P radon-thoron discriminative detector participated in the international intercomparison for integrating radon/thoron detectors organized by National Institute of Radiological Science (NIRS,Japan).Detectors were sent to NIRS for exposure.Radon intercomparison was conducted with radon chamber providing three levels of exposure:low,medium and high levels.Thoron intercomparison was carried out at thoron chamber,which also provided three levels of exposure:low,medium and high levels.Detectors were posted back to our laboratory for etching and analysis after exposure.Then the measured values were submitted to NIRS.Finally the reference values were informed of us.Results The relative percent difference (RPD) between the measured value and the reference value for radon was-13.8％,-14.4％ and-17.1％ at low,medium and high levels respectively,and that of thoron were-14.4％,8.9％ and-3.2％ at three levels respectively.Conclusions Both radon and thoron measurement of our detectors rank as " Category Ⅰ" in the 4th international intercomparisons for integrating radon/thoron detectors with the NIRS radon/thoron chambers.