In this study, a radiation measurement system with multifunctions for the rapid radiological characterization of a decommissioned nuclear facility site was developed and evaluated. The system remotely and simultaneously measures the beta and gamma radiation from the soil at a decommissioned nuclear facility site and wirelessly transmits the measurement data to the main server, which collects and analyzes the data. The radiation-measuring part of the system is composed of a sensing probe, multichannel analyzer (MCA), and laptop computer. The sensing probe is a phoswich radiation sensor (PHORS) consisting of two inorganic scintillators (NaI(Tl) and CaF₂(Eu)), each of which simultaneously measures the count rates and energies of the beta and gamma radiation. To test the performance of the PHORS, the beta and gamma radiation from a radiation source at 0–10 cm depths (at steps of 1 cm) under a soil surface was measured. The measurements show that the radiation count rates agree well with the theoretically predicted ones; the PHORS is as good as commercial radiation detectors in providing the energy spectrum of a radionuclide. In addition, a chi-square test was conducted, and the energy resolution was evaluated. The communication part of the system consisting of a global positioning system (GPS) and long-term evolution telecommunication (LTE) modem can successfully transmit the measurement data and their location information.

中文翻译：

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开发用于退役核设施站点的快速放射学表征的多功能辐射测量系统

在这项研究中，开发并评估了具有多功能功能的辐射测量系统，用于对退役核设施场所进行快速放射学表征。该系统可以远程同时测量退役核设施现场土壤中的β和γ辐射，并将测量数据无线传输到主服务器，该主服务器收集并分析数据。该系统的辐射测量部分由传感探头，多通道分析仪（MCA）和便携式计算机组成。传感探头是由两个无机闪烁体（NaI（Tl）和CaF ₂（Eu）），它们中的每一个都同时测量β和γ辐射的计数率和能量。为了测试PHORS的性能，测量了土壤表面下0-10 cm深度（以1 cm为步长）的辐射源的β和γ辐射。测量结果表明，辐射计数率与理论预测值吻合良好。PHORS在提供放射性核素能谱方面与商用辐射探测器一样好。另外，进行卡方检验，并评估能量分辨率。由全球定位系统（GPS）和长期演进电信（LTE）调制解调器组成的系统的通信部分可以成功传输测量数据及其位置信息。