Evaluation of a standard test method and material for low-activity waste product acceptance.

摘要

The dissolution behavior of a candidate reference glass has been measured under a range of test conditions. The data base from these tests can be used to evaluate the credibility and validity of test results reported by Private Contractors as part of the acceptance process for immobilized low-activity waste (ILAW) products for DOE wastes. The LRM-1 glass that was used in the tests was formulated to be compositionally representative of anticipated ILAW products for Hanford and other Department of Energy sites. Replicate tests with this glass were used to measure the variability in the response (i.e., the solution concentrations of B, Na, and Si) under different test conditions. The glass was further evaluated for possible use as a standard material by analysis of its composition, microstructure, density, and compressive strength. In addition, the Na leachability index was measured with the ANS 16.1 test, and the Toxicity Characteristic Leach Procedure was run. The results of those tests and analyses are summarized.