CRUD in PWR/VVER and BWR Primary Circuits
The objective of this report is to provide members with the basic understanding of the mechanisms involved and their relationship to material performance and activity buildup. Content of the report is outlined below.
- Fuel cladding failures due to accelerated corrosion
- Axial Offset Anomaly (AOA)
- Pressure drop problems especially in CANDU-plants and VVER units
- Build-up of out-of-core radiation fields
- Shutdown extensions due to high activity releases (Coolant clean-up)
- Increased generation of radioactive waste
- Interference with inspection necessities
