CAJ | 학술논문

为确定某核裂变活动后泄漏到空气中的放射性氙的活度浓度及其不确定度，在假设放射性氙泄漏为瞬时泄漏、泄漏到一封闭空间且分布均匀的情况下，通过衰变校正和平均活度物理测量的理论计算值与测量值一致的原则下，推导出空气中放射性氙监测的数学模型，并通过分析不确定度来源和各不确定度分量评定及合成的思路，评定了该数学模型在一定条件下的不确定度。在不确定度来源中，放射性测量的效率刻度是不确定度的主要来源，空气中氙的浓度、氙体积和γ射线的发射率的不确定度分量次之，衰变常数和时间计量的不确定度分量小，峰净计数率引入的不确定度分量和影响程度依赖于全能峰计数的相对标准不确定度σN。降低测量结果的不确定度要着重降低效率刻度、峰计数率和氙体积引入的不确定度分量。
위학정모핵렬변활동후설루도공기중적방사성선적활도농도급기불학정도，재가설방사성선설루위순시설루、설루도일봉폐공간차분포균균적정황하，통과쇠변교정화평균활도물리측량적이론계산치여측량치일치적원칙하，추도출공기중방사성선감측적수학모형，병통과분석불학정도래원화각불학정도분량평정급합성적사로，평정료해수학모형재일정조건하적불학정도。재불학정도래원중，방사성측량적효솔각도시불학정도적주요래원，공기중선적농도、선체적화γ사선적발사솔적불학정도분량차지，쇠변상수화시간계량적불학정도분량소，봉정계수솔인입적불학정도분량화영향정도의뢰우전능봉계수적상대표준불학정도σN。강저측량결과적불학정도요착중강저효솔각도、봉계수솔화선체적인입적불학정도분량。
In order to give the uncertainty of activity concentration of radio xenon which leaked into air after nu -clear fission happened , it was supposed that the radio xenon leakage was instantaneous , and the radio xenon leaked into a confined space ,the distribution was uniform .After decay correction and in principle that the theo-retical value of the average activity is consistent with the measuring values ,the mathematical model of the air-borne radio xenon monitoring was derived .By analyzing the sources of uncertainty ,the uncertainty components evaluation , synthesis ,and the mathematics model was evaluated under the certain condition .In the sources of uncertainty ,radio xenon peak net count rate and efficiency value are the main sources ,the concentration ,volume of xenon in air and gamma -ray emission rate of radio xenon are smaller ,the decay constant and time measure-ment are the least .