|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Characterization of Corrosion Product Deposits on Fuel Cladding Surface Under Various Heat Flux Conditions
||Yunju Lee, Junhyuk Ham, Seung Chang Yoo, Ji Hyun Kim
|On-Site Speaker (Planned)
Axial Offset Anomaly (AOA) is a serious concern in several Pressurized water reactor power plants. Essentially, AOA is caused by deposition of a sufficient amount of boron in fuel crud deposits mostly found on the upper region of the fuel assembly. The crud deposition and boron accumulation are influenced by chemical and thermal-hydraulic behavior of water near fuel cladding surface. To predict the effect of crud deposition, crud deposition mechanism should be investigated, considering structural and chemical composition of crud layer. However, there is no detail study to investigate the changes in porosity and chemistry of crud in different heat flux conditions.
In this study, simulated crud deposition experiments were performed in three different heat flux conditions. To investigate the effect of heat flux on the structure and chemistry of CRUD, the chemical composition of corrosion product, especially boron concentration, of the three samples were compared.