ASTM C1220-21 PDF Download

A common test method used to assess the chemical toughness of monolithic waste forms used for the disposal of radioactive waste is ASTM C1220-21. Under low specimen surface-to-leachant volume ratio circumstances, the test is performed on waste forms such as glass, ceramic, cement, or cermet in a test solution at temperatures below 100°C.

The goal of the test is to describe how various waste types dissolve or leach in various leachates under particular test circumstances. A static environment with a constant solution volume and temperature is used for the test. Analyzing the amounts of components released and accumulated in the solution over the course of the test allows for the determination of the waste form's reactivity.

To characterize material behavior and enable comparisons between various laboratories, the standard suggests utilizing three Leachant formulations and four reference test matrices. To comprehend the chemical and physical changes that take place during the test, it is also advised to inspect any surface areas of the specimens that have been affected.

However, because it does not regulate oxidation reactions, this test method is not appropriate for assessing metallic materials. When conducting this test, it is essential to adhere to all applicable quality assurance standards for the acceptance of the data.