Polymer Insulation in Nuclear Power Station

2017 ◽  
pp. 316-349
Keyword(s):  
Air Pollution ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Surface Charge ◽  
Nuclear Power ◽  
Gamma Ray ◽  
Basic Research ◽  
Insulating Materials ◽  
Interesting Study ◽  
Gamma Ray Irradiation

Nuclear power is giving an increasing share of power resource in China since it produces much less air pollution compared with power plant consuming fossil fuel. The power system insulation in nuclear power plant takes the risk of radiation. This chapter provides some basic research on the effect of radiation on different materials. The gamma-ray irradiation inhibiting surface charge accumulation on polyethylene is shown in this chapter. The quantity of surface charge is relative with the direction and the magnitude of voltage. Another interesting study presents the effects of atmospheric pressure on tracking failure of gamma-ray irradiated polymer insulating materials. Finally this chapter puts forward a research revealing that the Magnetic could influence the field tracking failure of gamma-ray irradiated polybutylene polymers.

scholarly journals Visualization of Radiocesium Distribution in Surface Layer of Seafloor Around Fukushima Daiichi Nuclear Power Plant

2021 ◽  
Author(s):  
Yukihisa Sanada ◽  
Yoshimi Urabe ◽  
Toshiharu Misonou ◽  
Takehiko Shiribiki ◽  
Takahiro Nakanishi ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Sediment Core ◽  
Nuclear Power ◽  
Gamma Ray ◽  
Detection System ◽  
Aquatic Organisms ◽  
Core Sample ◽  
Seafloor Topography ◽  
Fukushima Daiichi

Abstract Large quantities of volatile radionuclides were released into the atmosphere and the hydrosphere following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident on March 11, 2011. Monitoring of radiocesium in sediment is important for evaluating the behavior of radiocesium in the environment and its effect on aquatic organisms. In this study, the radiocesium distribution in the surface sediment around the FDNPP was visualized as a radiocesium map using periodical survey data from a towed gamma-ray detection system. The uncertainty of the radiocesium map was evaluated via comparison with a large amount of sediment core sample data. The characteristics of the radiocesium distribution were examined considering the seafloor topography and a geological map, which were obtained via acoustic wave survey. The characteristics of the formation of 137Cs anomaly at the estuaries were analyzed using a contour map of 137Cs concentration combined with water depth. Validation of the created map showed that it was comparable with actual sediment core samples. The map generated using the towed radiation survey depicted the 137Cs concentration distribution as the position resolution of a 1 km mesh. Finally, the 137Cs concentration decreased with time in consideration of such uncertainty.

scholarly journals Visualization of radiocesium distribution in surface layer of seafloor around Fukushima Daiichi Nuclear Power Plant

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yukihisa Sanada ◽  
Yoshimi Urabe ◽  
Toshiharu Misonou ◽  
Takehiko Shiribiki ◽  
Takahiro Nakanishi ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Sediment Core ◽  
Nuclear Power ◽  
Gamma Ray ◽  
Detection System ◽  
Aquatic Organisms ◽  
Core Sample ◽  
Seafloor Topography ◽  
Fukushima Daiichi

AbstractLarge quantities of volatile radionuclides were released into the atmosphere and the hydrosphere following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident on March, 2011. Monitoring of radiocesium in sediment is important for evaluating the behavior of radiocesium in the environment and its effect on aquatic organisms. In this study, the radiocesium distribution in the surface sediment around the FDNPP was visualized as a radiocesium concentration map using periodical survey data from a towed gamma-ray detection system. The uncertainty of the radiocesium map was evaluated via comparison with a large amount of sediment core sample data. The characteristics of the radiocesium distribution were examined considering the seafloor topography and a geological map, which were obtained via acoustic wave survey. The characteristics of the formation of 137Cs anomaly at the estuaries were analyzed using a contour map of 137Cs concentration combined with water depth. Validation of the created map showed that it was comparable with actual sediment core samples. The map generated using the towed radiation survey depicted the 137Cs concentration distribution as the position resolution of a 1 km mesh. Finally, the 137Cs concentration decreased with time in consideration of such uncertainty.

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