Session: 04-02 Geologic Repository & Performance

Paper Number: 109365

109365 - Development of a Generic Biosphere Assessment Modeling Strategy for the Snf Deep Geological Disposal in the Korean Peninsula 

In the Republic of Korea (ROK), a national R&D project for the development of a system-level safety assessment methodology for deep geological disposal facility of spent nuclear fuel has been launched in 2021. The candidate disposal site has not yet been specified in the ROK, so the relevant information and data are very limited. Nevertheless, as a part of the safety case development, it is necessary to develop generic assessment models using various types of Geosphere-Biosphere Interfaces (GBIs) and Potentially Exposed Groups (PEGs) reflecting domestic environmental characteristics based on historical records and prediction for climate change and land development, and social lifestyle of ROK in advance of  the actual siting procedures and licensing of a disposal facility.

In this study, after reviewing the guidance from IAEA international cooperation program such as BIOMASS and the experience of leading countries such as Sweden, Finland, and Japan on setting environmental conditions when evaluating the biosphere of spent nuclear fuel and/or high-level radioactive waste disposal facilities, a unique modeling strategy was developed in order to systematically construct and select the Korean generic biosphere assessment models. It is composed of three(3) process steps of combination, screening, and export scoring on the biosphere system conditions. Firstly, various conditions in the biosphere system components of climate, topography, GBI, and PEG were combined each other. Secondly, the combined calculation cases were configured into the interrelation matrices to screen out some calculation cases which could be very unlikely or less significant in aspects of exposure dose. And finally, the selected calculation cases were prioritized based on the expert’s judgment through scoring on the knowledge, probability, and importance. In addition, a strategy to treat continuous biosphere evolution over a long-term period using transition time periods between chronologically adjacent biosphere systems with different climates and landscapes was proposed as a supplementary method to be expressed in discrete but sequential environmental changes.

Presenting Author: Jonghyun KIM RADCORE

Presenting Author Biography: EDUCATION
- Bachelor of Nuclear Eng., Hanyang Univ.,1997
- Master of Mechnical Eng., Chungnam Nat.Univ., 2006
- Doctor of Nuclear Eng., KAIST, 2014

WORK EXPERIENCE
- KEPRI(KEPCO Research Institute), NPP Safety Analysis, as Staff , Till 2003
- ACT Co.ltd, NPP Safety Analysis, asTeam Leader, Till 2020
- RADCORE Co.ltd, SNF Disposal Facility Safety Assessment, as General Manager, Present