RESULTS OF A ROUND ROBIN LEACHING TEST FOR VITRIFIED RADIOACTIVE WASTE
Multiple efforts have been undertaken to define standard methods in order to meet requirements for quality control of solidified high radioactive waste glasses. The predominant objective is to determine the chemical stability of the waste product in contact with underground waters of the disposal repository and its properties with respect to radionuclide retention. During 1982 the US Material Characterization Center has carried out a static round robin leach test (MCC-1) at 90 degrees C with international contribution. Complementary to the MCC-1 test, the EC in 1983 performed a static leach test at temperatures up to 200 degrees C, but for comparison with MCC-1 also at 90 degrees C. The method is suitable also for tests with natural waters and with radionuclide tracered or fully active samples. In total 12 laboratories have participated in the test. The test was performed in autoclaves. The leachant solution was deionized water. Variable test parameters were the temperature and the sampling time. The test material was the British borosilicate glass UK209 containing 25 % of a simulated high active waste. The leachate was analyzed for five elements. In general a good reproducibility precision for the five elements and a high reliability of the test method has been achieved.
Bibliographic Reference: JOURNEES DE BRUXELLES SUR LE VERRE ET L'EAU, BRUXELLES (BELGIUM), JUNE 14-15, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31676 ORA
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Record Number: 1989123006700 / Last updated on: 1987-01-01
Available languages: en