Expression of GIS for the food chain assessment around Kori nuclear power plant

Assuming an accidental release of radionuclides from Kori Nuclear Power Plants, the distribution of radionuclides in soil and plants were calculated. The results which show the concentration change with time and regions were displayed by GIS. The object for the presentation was 131I concentration in rice which is one of staple foodstuffs. Provided by deposited 131I concentrations, ECOREA-II code computed the 131I concentration of the soil and the plant in the area divided by 100 unit cells in total, in which the concentrations also varied with time. The results were introduced into the attributed data of previously designed polygon cells in ArcView. In order to display the concentration change with time by monotonic color, the RGB value for ArcView color lamp was controlled. Expression, which is graded numerical value on the cells with 131I concentration was devised for the convenience of discrimination in color change on the cells. This display definitely helped the concentration change around Kori area be acceptable to public