CAJ | 학술논문

在一些特定的情况下，需要一种能快速监测水中放射性活度变化的方法和装置。当前水中总β放射性测量主要采用取样测量的方法，取样测量的结果精确却耗时，这就需要采用新的仪器和设备对水中的放射性进行就地测量。研制了一套基于塑料闪烁体的水中放射性在线监测装置，对该装置的性能进行了模拟计算和初步测试。模拟计算结果表明，装置对40 K探测效率为4．9×10-5 cps/[（ Bq/L） cm2]。通过实际测量，本装置对40K探测效率为3．0×10-5cps/[（ Bq/L）cm2]，模拟结果与实测结果的差异可能是闪烁光在传输过程中的损失造成的。对该装置进行测试，装置对水中的40 K的最小可探测活度浓度约为500 Bq/L。
재일사특정적정황하，수요일충능쾌속감측수중방사성활도변화적방법화장치。당전수중총β방사성측량주요채용취양측량적방법，취양측량적결과정학각모시，저취수요채용신적의기화설비대수중적방사성진행취지측량。연제료일투기우소료섬삭체적수중방사성재선감측장치，대해장치적성능진행료모의계산화초보측시。모의계산결과표명，장치대40 K탐측효솔위4．9×10-5 cps/[（ Bq/L） cm2]。통과실제측량，본장치대40K탐측효솔위3．0×10-5cps/[（ Bq/L）cm2]，모의결과여실측결과적차이가능시섬삭광재전수과정중적손실조성적。대해장치진행측시，장치대수중적40 K적최소가탐측활도농도약위500 Bq/L。
A method for monitoring of radioactivity in water rapidly is needed in certain cases .At present , sam-pling measurement was widely used in gross βradioactivity measurements in water .The result was precise but time-consuming .It needs to adopt the new instruments and equipment for in situ -measurement of the radio-activity in the water .We developed a device to monitoring radioactive in water , which is based on plastic scin-tillator , the performance of this device was simulated and preliminary test is made .The simulation results show that the device detection efficiency for 40K is 4.9 ×10 -5cps/[(Bq/L)cm2].By actual measurement, the de-vice detection efficiency for 40K is 3.0 ×10 -5cps/[(Bq/L)cm2].The difference between simulation results and measured results may be due to the light loss in the process of transmission .Testing the device , the device for a minimum detectable activity concentration is about 500 Bq/L in water .