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KMID : 0364920000250020081
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Journal of Radiation Protection and Research
2000 Volume.25 No. 2 p.81 ~ p.87
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Atmospheric Dispersion Assessement for Potential Accidental Releases at Yonggwang Nuclear Power Plants
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Abstract
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XOQ_DW code is currently used to assess the atmospheric dispersion for the routine releases of radioactive gaseous effiuents at Yonggwang nuclear power plants. This code was developed based on XOQDOQ code and an additional code is required to assess the atmospheric dispersion for potential accidental releases. In order to assess the atmospheric dispersion for the accidental releases, XOQAR code has been developed by using PAVAN code that is based on Reg. Guide 1.145. The terrain data of XOQ_DW code inputs and the relative concentrations (X/Q) of XOQ_DW code outputs are used as the inputs of the XOQAR code through the interface with XOQ_DW code. By using this code, the maximum values of X/Q at exclusion area and low population zone boundaries except for sea areas were assessed as 1.33×10^(-4) and 7.66×10^(-6) sec/㎥, respectively. Through the development of this code, a code system is prepared for assessing the atmospheric dispersion for the accidental releases as well as the routine releases. This developed code can be used for other domestic nuclear power plants by modifying the terrain input data.
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