|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Clay and carbon materials-based engineered barriers for technetium immobilizationстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Makarov A., Safonov A., Sitanskaia A., Martynov K., Zakharova E., Kulyukhin S.
- Журнал: Progress in Nuclear Energy
- Том: 152
- Год издания: 2022
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 104398
- DOI: 10.1016/j.pnucene.2022.104398
- Аннотация: Bentonite clays, which are common components used for construction of engineered barriers are not capable of preventing migration of highly soluble oxidized technetium forms. Modification of bentonite clay materials with natural and industrial coals of various genesis, added in amount of 5 mass %, was carried out as part of thisresearch. The anthracite from Omsukchan coal cluster, coke of Kuznetsk basin and activated carbons of AG-3 and CAU marks have demonstrated high ability to immobilize technetium under oxidizing conditions with values of partition coefficient exceeding 1000 ml/g. The resulting composite materials are characterized by low waterpermeability (Kp < 1–5⋅10-11 m/s at a dry density of 1.1–1.2 g/cm3), which is mandatory for engineered barriers. Dispersed materials are easy-flowing (ff > 4), which allows the construction of clay barriers by dry, cavityfree backfilling. Quantitative immobilization of technetium occurs during the first day of interaction, withstrongly-bonded forms accounting for over 90% of all technetium in the barrier material.
- Добавил в систему: Кулюхин Сергей Алексеевич