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Park, Jaeyeong
Fuel Cycle and Waste Laboratory
Research Interests
  • Radioactive waste treatment and management; Spent nuclear fuel recycling; Decontamination and Decommissioning; Nuclear Fuel Cycle

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Statistical analysis of effects of test conditions on compressive strength of cement solidified radioactive waste

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Title
Statistical analysis of effects of test conditions on compressive strength of cement solidified radioactive waste
Author
Byeon, HyeongjinPark, Jaeyeong
Issue Date
2022-11
Publisher
한국원자력학회
Citation
NUCLEAR ENGINEERING AND TECHNOLOGY
Abstract
Radioactive waste should be solidified before being disposed of in the repository to eliminate liquidity or dispersibility. Cement is a widely used solidifying media for radioactive waste, and cement solidified waste should satisfy the minimum compressive strength of the waste acceptance criteria of a radioactive repository. Although the compressive strength of waste should be measured by the test method provided by the waste acceptance criteria, the method differs depending on the operating repository of different countries. Considering the measured compressive strength changes depending on test conditions, the effect of test conditions should be analyzed to avoid overestimation or underestimation of the compressive strength during disposal. We selected test conditions such as the height-to-diameter ratio, loading rate, and porosity as the main factors affecting the compressive strength of cement solidified radioactive waste. Owing to the large variance in measured compressive strength, the effects of the test conditions were analyzed via statistical analyses using parametric and nonparametric methods. The results showed that the test condition of the lower loading rate, with a height-to-diameter ratio of two, reflected the actual cement content well, while the porosity showed no correlation. The compressive strength assessment method that reflects the large variance of strengths was suggested.
URI
https://scholarworks.unist.ac.kr/handle/201301/60034
DOI
10.1016/j.net.2022.11.008
ISSN
1738-5733
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