As part of the safety case development for generic disposal sites in Korea, it is necessary to develop generic assessment models using various geosphere–biosphere interfaces (GBIs) and potentially exposed groups (PEGs) that reflect the natural environmental characteristics and the lifestyles of people in Korea. In this study, a unique modeling strategy was developed to systematically construct and select Korean generic biosphere assessment models. The strategy includes three process steps (combination, screening, and experts’ scoring) for the biosphere system conditions. First, various conditions, such as climate, topography, GBIs, and PEGs, were combined in the biosphere system. Second, the combined calculation cases were configured into interrelation matrices to screen out some calculation cases that were highly unlikely or less significant in terms of the exposure dose. Finally, the selected calculation cases were prioritized based on expert judgment by scoring the knowledge, probability, and importance. The results of this study can be implemented in the development of biosphere assessment models for Korean generic sites. It is believed that this systematic methodology for selecting the candidate calculation cases can contribute to increasing the confidence of future site-specific biosphere assessment models.

1. Introduction
2. Foreign Cases Review on BiosphereSystem Condition Setting Down
    2.1 BIOMASS Methodology
    2.2 Biosphere System Condition in LeadingCountries’ Biosphere Models
3. Development Strategy of Korean BiosphereAssessment Model
    3.1 Strategy to Select Biosphere AssessmentModel
    3.2 Strategy to Treat Biosphere System Evolution
4. Estimation of Korean Biosphere SystemConditions
    4.1 Composition of Biosphere System Conditionsfor Korean Generic Site
    4.2 Screening of Biosphere System ConditionsUsing Interrelation Analysis
    4.3 Priority Selection of Candidates ConsideringExpert Judgments
5. Conclusions
Acknowledgements
REFERENCES

• Do Hyun Kim(RADCORE Co. Ltd.)
• Wontak Lee(RADCORE Co. Ltd.)
• Dongki Kim(RADCORE Co. Ltd.)
• Jonghyun Kim(RADCORE Co. Ltd.)
• Joowan Park(RADCORE Co. Ltd.) Corresponding author