Guoxing Ren

Marine radioactive field monitoring sensor based on NaI (Tl)

There are many deficiencies in traditional laboratory means, which make it difficult to meet the real-time monitoring requirements of nuclear radiation on marine field. In this paper, a radioactive monitoring sensor for marine field was proposed, which is based on NaI (Tl) scintillation crystal, while energy calibration and resolution calibration are conducted by employing a standard radioactive source, and curve fitting is conducted by employing MATLAB. Through the test under seawater in Qingdao wharf, the results are in good agreement with the laboratory test results.

Design and Development of an In Situ Radioactivity Measuring System in the Marine Environment

It is significant to develop the in situ radioactivity measuring system in the marine environment for the autonomous and continuous monitoring in the long term and even for the pollution early warning. The design of a set of a marine radioactivity measuring system was presented in the paper using the underwater spectrometer as the sensor. A data acquisition and control device was developed to collect and process the gamma ray spectra measured by the sensor, and also to be responsible for the monitoring system control and power supply. The bulk monitoring data were transferred to the server in the laboratory through the Beidou satellite. The gamma ray spectra measured and the analysis results of the radioactivity in the seawater were provided for the users. This research work and measured data have great importance to the more particular knowledge of the radioactivity in the marine environment and to the development of the marine radioactive monitoring and pollution early warning.