Derivation and Comparison of Preliminary Derivation Concentration Guideline Level (DCGL) According to Scenarios of Kori Unit 1 Using RESRAD-BUILD

The RESRAD-BUILD code is an exposure path analysis code for assessing the potential exposure dose of an individual or worker in a building contaminated with residual radioactive material. In the RESRAD-BUILD code, radioactive particulates in the air, aerosol indoor radon decay products, and tritium water vapor, including external exposure to penetration radiation, due to the air submersion of the radioactive material and radioactive particulates that have accumulated at the source, are considered. Additionally, consideration is given to the intake and ingestion pathways of materials emitted from the source and to materials that have accumulated on the building surface. The Fig. 1 shows exposure pathway of RESRAD-BUILD