Nuclear Plant Chemistry

Achieving higher burnup and power uprates in PWR causes the build-up of Chalk River Unidentified Deposit (CRUD) on the upper spans of nuclear fuel rods. CRUD deposits produce operational issues such as CRUD-induced power shift (CIPS) and CRUD-induced localized corrosion (CILC). Understanding of the formation of porous CRUD deposits is a significant challenge to science-based multi-scale modeling and its valuation through elaborate experiments. The accurate prediction of CRUD formation requires a meso-scale CRUD chemistry model that can be fully coupled with neutronics, heat transfer, fluid flow, and surface processes such as dissolution and precipitation.

On-going projects : High  Development of Water Chemistry Analysis Code

Project Description : A multi-physics meso-scale model is required to understand the phenomena of boron hideout within CRUD. Closely coupled multi-physics include heat transport of two phase boiling, fluid dynamics and
mass transport within porous medium, radial species generation by radiolysis, and chemical reactions including precipitation.

High-fidelity Meso-scale Modeling and Simulation

On-going projects : -

Project Description : Under planning

Experimental Simulation of CRUD Growth and its Prevention

©  Journal of natural science

291 Daehak-ro, Yuseong-gu, Daejeon 34141,

Korea Advanced Institute of Science and Technology (KAIST)

Department of Nuclear & Quantum Engineering, Republic of KOREA



K&FC Lab.