Standard Test Method for Measurement of the Dissolution Rate of Nuclear Waste Forms Using the Single-Pass Flow-Through Test Method

Importancia y uso:

5.1 This test method provides a prescriptive description of the design of a SPFT test apparatus and identifies aspects of the performance of SPFT tests and interpretation of test results that must be addressed by the experimenter to provide confidence in the measured dissolution rate.

5.2 The SPFT test method described in this test method can be used to characterize various aspects of waste form corrosion behavior that can be utilized in a mechanistic model, for example, calculating long-term behavior of a nuclear waste glass.

5.3 Depending on the values of test parameters that are used, the results of SPFT tests can be used to measure the intrinsic dissolution rate of a waste form, the temperature and pH dependencies of the rate, and the effects of various dissolved species on the dissolution rate.

5.4 The reacted sample recovered from a test may be examined with surface analytical techniques, such as scanning electron microscopy, to further characterize the corrosion behavior. Such examinations may provide evidence regarding whether the waste form is dissolving stoichiometrically, if particular leached layers and secondary phases were formed on the specimen surface, and so forth. These occurrences may impact the accuracy of the waste form dissolution rate that is measured using this method. This test method does not address the analysis of solid reaction materials.

Subcomité:

C26.13

Referida por:

C1285-21, C1926-24

Volúmen:

12.01

Número ICS:

81.040.30 (Glass products)

Palabras clave:

glass dissolution rate; waste form dissolution rate;