On-line dissolution and analysis of corrosion products

The input of corrosion product iron to the Boiling Water Reactor via the feedwater system presents numerous operational problems. The 'crud' that forms, deposits on fuel clad surfaces in the core. This can lead to poor heat transfer, fuel failures, and increased radiation levels throughout the plant. A technique is being developed for the on-line dissolution and analysis of iron in corrosion products using flow injection, microwave heating and ion chromatography. Alternate analytical techniques such as flow injection analysis with a colorimetric finish has also been used. This development effort was funded under EPRI contract and included the testing of several acid solutions for the dissolution of corrosion products. Dissolution rates, parameters and the impact of these reagents on the analytical systems are discussed