The Study On Monitoring Thermal Discharge Of Ningde Nuclear Power Plant With HJ-1B Infrared Camera Data

In recent years, the demand of China for nuclear power is increasing, and thenumber of nuclear power plants also continue to rise, so the influence of nuclearpower station emissions on the surrounding ecological environment are gettingserious, this lead to make the environmental impact monitoring and impact evaluationin thermal discharge as a public topic. At present, there are two kinds of methods tomonitor the thermal discharge, remote sensing monitoring and ground test. Relative tothe time consuming ground test, the remote sensing monitor with the feature of fast,dynamic and continuous, has a wide application in the evaluation and monitor ofenvironment.In this paper, the infrared camera data of environmental satellite, from March2013to March2014, were used to monitor the thermal discharge of the water nearNingde nuclear power station, which were processed to invert the sea surfacetemperature combined with the radiation transfer model and meteorological data. Themain content was as follow.(1)The significance of monitoring the thermal discharge of the nuclear powerstation, the research status at home and abroad were analyzed and summarized in thispaper. The physical geography surrounding Ningde nuclear power station waters wereillustrated, in preparation for the later data processing and analysis. At the same time,the infrared camera data of HJ satellite should be obtained, before and after thenuclear power generation.(2)It was important to preprocess the infrared camera data, including the waterand land separation, cloud removal and so on. Then, it is time to invert the sea surfacetemperature combined with the radiation transfer model and meteorological data, andaccess the statistics and analysis of the thermal discharge.(3) It was concluded from the rule of thermal discharge in Ningde nuclear powerstation that the water temperature of offshore was higher than the sea surfacetemperature of out at sea in summer, and it was just the opposite in winter. In addition,the area of thermal discharge in summer was larger than in winter.(4) The algorithm accuracy of sea surface temperature inversion was proved andtested, both from the point and polygon, based on American Landsat8satellite TIRSremote sensing data and ground experiments. Compared with the result of HJ-1Binfrared camera data, the ground test comparison result showed that the sea surfacetemperature inverted with radiation transfer model in Ningde nuclear power stationwas consistent with the real observation, and HJ-1B infrared camera data result wasmuch closer to the data accuracy measured with CE312. On the other hand, thethermal discharge inverted by Landsat8data could consist with the HJ-1B infraredcamera data result well, both on diffusion shape and the average sea surfacetemperature.