선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- The most effective chemical was selected according to the results of the experiments. A device to solve the ageing effect was explored by analyzing the results of the electrokinetic experiment, which was conducted with the addition of the selected chemical.
- The experiment was initiated under a constant electric voltage gradient. After completion of the experiment, the TRIGA reactive soil in the column was divided into several sections, the 137Cs and 60Co radioactive concentrations of which were then analyzed using MCA.
- In order to obtain an equilibrium sorption coefficient, 6 sets of Cs+ and Co2+ solutions, with different concentrations, were prepared and put into individual plastic bottles containing 10 g of soil. The temperature was 25℃, 50mfi of a Cs+ solution for 10 g of soil was used, and the shaking time was 24 hours.
- In the current study, TRIGA non-radioactive soil intentionally contaminated with Cs+ and Co2+ for a short time and the TRIGA radioactive soil contaminated with 137Cs and 60Co for a long time were remediated with the electrokinetic method. The ageing effect was analyzed by comparing the results of the two remediation experiments. In order to increase the efficiency of removing 137Cs and 60Co from the aged radioactive soil, many kinds of chemicals were added to the electrokinetic experiments.
- To increase the efficiency of remediation of the radioactive soil contaminated with 137Cs and 60Co, experiments were conducted to select an optimum additive by mixing the soil with many kinds of chemicals as follows.
대상 데이터
- Radioactive soil from the TRIGA site contaminated with 137Cs and 60Co, which has been stored in a radioactive waste storage at KAERI since 1988, was used for this experiment. The radioactive concentrations of 137Cs and 60Co in the soil were 14.
- The main components in the TRIGA soil were SiO2, AI2O3, and K20. In addition, the physical characteristics of the soil, such as the dry bulk density, the porosity, and the water content are li아ed in Table 2.
이론/모형
- The Galerkin finite element method with a linear basis function, an implicit difference scheme for the space derivative, and a backward difference scheme for the time derivative were used. In addition, the Thomas algorithm was used for the matrix calculation. Meanwhile, to avoid any numerical oscillation, a space step (Ax) was selected so that Pe (Pecret number) <2, and a time step (At) was selected so that Cue (Courant number) M1.
- 11, was rewritten in the FORTRAN 77 language. The Galerkin finite element method with a linear basis function, an implicit difference scheme for the space derivative, and a backward difference scheme for the time derivative were used. In addition, the Thomas algorithm was used for the matrix calculation.
- 01 M of Cs+ and Co2+ solution, and then it was dried for 3 days. The contaminated soil was remediated using the electrokinetic method. Figure 2 shows the electrokinetic experimental equipment on a laboratory scale.
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