الفهرس | Only 14 pages are availabe for public view |
Abstract Spent liquid scintillator cocktails which originated from liquid scintillation counting technique are containing radioactive nuclides and classified as one of the most problematic wastes. This can be attributed to possessing both of specific radioactive contaminants and their organic nature. However, special options should be developed to address these characteristics of these wastes. Solidificationlstabilization (S/S) of these wastes in cement is oriented to prevent the return of the harmful radioactive materials to the environment during the disposal of these wastes keeping the surrounding environment clean and tidy for man and has coming generations. The present study aims to immobilization of the spent organic liquid scintillator wastes (LSW) collected and segregated at the Nuclear Research Center, Egyptian Atomic Energy in cement matrices which contain natural clay as admixture. This work is a part of comprehensive program stated and carried out at the Radioisotopes Department since 1970. The performance of the candidate final waste form (FWF) that composed from cement matrix mixed at w/c ratio 0.3 with 3% natural clay, relative to the weight of cement powder as admixture, and immobilized up to 15% from LSW, relative to the weight of the cement paste, was evaluated after curing under different conditions. Based on the experiments data, it could be concluding that, there are prime encouraging indications that the candidate FWF can be an adequate monolith for solidificationlstabilization up to 15% of actual spent LSW, relative to the weight of the cement paste, and comply with the requirements of the disposal process even in at very exaggerating conditions. |