CAJ | 학술논문

固定式环境γ辐射剂量率仪是承担环境连续监测任务的主要设备，不便于拆卸送往计量实验室进行校准检定，且送检周期较长，影响连续监测点数据的连续性。为按期校准固定式仪表，本文结合蒙特卡罗方法研制了能量补偿型高气压电离室和便携式137 Cs照射装置，利用天然本底辐射（陆地γ射线和宇宙射线）和便携式照射装置产生的137 Cs γ射线参考辐射对固定式环境γ辐射剂量率监测仪表开展现场校准实验。结果表明，采用环境比对和现场照射的方法能较好地解决固定式环境γ辐射剂量率仪的校准问题，现场所得校准因子与标准实验室中校准因子的相对偏差小于5％。
고정식배경γ복사제량솔의시승담배경련속감측임무적주요설비，불편우탁사송왕계량실험실진행교준검정，차송검주기교장，영향련속감측점수거적련속성。위안기교준고정식의표，본문결합몽특잡라방법연제료능량보상형고기압전리실화편휴식137 Cs조사장치，이용천연본저복사（륙지γ사선화우주사선）화편휴식조사장치산생적137 Cs γ사선삼고복사대고정식배경γ복사제량솔감측의표개전현장교준실험。결과표명，채용배경비대화현장조사적방법능교호지해결고정식배경γ복사제량솔의적교준문제，현장소득교준인자여표준실험실중교준인자적상대편차소우5％。
T he fixed environmental gamma radiation ratemeter is the main equipment to undertake environmental continuous monitoring tasks and not easy to move for metrolo‐gy laboratory calibration ,and the submission of a longer period affects the continuity of the continuous monitoring data .For the on time calibration of fixed environmental gam‐ma radiation ratemeter ,combined with the Monte Carlo method ,the energy‐compensa‐ted high‐pressure ionization chamber and portable 137 Cs irradiation facility were devel‐oped .Using natural background radiation (including cosmic rays and terrestrial gamma rays) and 137 Cs gamma rays reference radiation field , the on‐site calibration for fixed environmental gamma radiation ratemeter was carried out .The results show that the environment intercomparison and on‐site irradiation can solve the calibration problem of fixed environmental gamma radiation ratemeters ,and the relative deviation of calibration factors obtained from on‐site calibration and in standard laboratory is less than 5% .