The first application of the fast monitor of radioactive water in our country
Time：2016.04.28 Browse 405 Second
April 22, by the State Oceanic Administration Ecology Center researcher Dong Zhenfang research team developed after perfect stereotypes of specifically for water surface radioactive in situ monitoring of radioactive water fast monitoring instrument for the inaugural application success. Stereotypes of radioactive water quick monitor participated in the North Sea environmental monitoring center of State Oceanic Administration's commitment to 2016 the Yellow Sea radioactivity monitoring of spring cruise task, April 5 to April 14, with 1115 survey ship performed underway monitoring work, successful completion of the surface water of the Yellow Sea radioactive cesium monitoring. Continuous equipment operation is stable and reliable, the whole voyage to get a 22 CS core core sample enrichment, each enriched seawater 800L. As the survey ship docked in the fog, announced the success of the inaugural shaping equipment.
Core sample by HPGe gamma spectrometer obtained from direct measurements on the activity of radioactive cesium in seawater, combined with position information, you can describe the distribution of the Yellow Sea regional survey of radioactive cesium, reflect the level of sea water in the artificial radionuclides can reflect the influence of the Fukushima nuclear accident in Japan for the Yellow Sea. With the development of nuclear power in China's coastal areas, as well as possible across the border of radioactive contamination, water bodies of radioactive fast monitor will be the necessary equipment for marine survey work.
The rapid monitoring of radioactivity in water body has been set up, and the automatic regulation and control function of the monitor has been perfected. Sampling volume of continuous integration, flow rate monitoring and control, automatic acidity control, pressure monitoring and control, water leakage shutdown protection, running data records, shutdown records, running status display, fault tips, etc.. Convenient operation and maintenance, one person can complete monitoring throughout the voyage, which greatly improves the work efficiency, reduces the labor intensity. According to the characteristics of the suspended sediment in the coastal waters, the 2 stage filtration was adopted to ensure the quality of the sampling. The detection limit of radioactive cesium in seawater is reduced by 1 orders of magnitude, which is large in sampling volume. The monitor is installed in the laboratory of the survey ship, and it can realize the fast automatic sampling and monitoring of the radioactive cesium. Water body radioactivity monitor can be used in water body radiation emergency monitoring, and can also be used for routine monitoring of radioactivity in water body.
It is a difficult task to "enrich" radionuclides from seawater. People who participated in the marine radioactive monitoring mission have a deep experience, and the workload of the marine radioactivity monitoring is high, the labor intensity is high, and the time is long. In the field need to collect large volumes of sea water samples. Large volumes of seawater samples of the acquisition, storage, handling, is a physical labor, subsequent analysis only after the end of the investigation, seawater samples shipped back to the lab on land in. Rapid radioactive water monitor stereotypes, realize a monitor and a HPGe gamma spectrometer, radioactive cesium in the entire range of surface water monitoring task is completed by one operator can, get rid of the bottled water sampling is a major breakthrough in the field of marine radioactivity monitoring, laid the foundation for marine radioactivity monitoring.
The State Oceanic Administration, Beihai environmental monitoring center as the first user equipment, the first application support. In this voyage of application, the monitoring center of two staff training and trial instrument. The instrument is fast, accurate and simple, so that the monitoring personnel to get rid of the complicated manual labor, marine radioactive monitoring work become relaxed and happy, the instrument was a marine monitoring personnel.
Fast setting water radiation monitor, first application is completed, as the instrument of commercialization, provide favorable evidence. Water body radioactive fast monitor will become nuclear power, environmental protection, marine and other units and supervision department of the modernization of radioactive monitoring tool.