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 Self-leveling behavior of mixed solid particles in cylindrical bed using gas-injection method
Tác giả hoặc Nhóm tác giả: Le Hoang Sang Phan, Phi Manh Ngo, Ryo Miura, Yusuke Tasaki, Tatsuya Matsumoto, Wei Liu, Koji Morita
Nơi đăng: JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY; Số: 0022-3131;Từ->đến trang: 1-12;Năm: 2018
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
The self-leveling of debris beds is a critical phenomenon to be clarified in the safety assessment of material relocation and decay heat-removal phases in postulated core-disruptive
accidents in sodium-cooled fast reactors. In recent years, we have conducted several series of
experiments using simulant materials to develop an experimental database of self-leveling
processes in particle beds and proposed an empirical model to predict the bed height during
self-leveling. The obtained experimental knowledge and proposed model applicability have
been limited to homogeneous particles, although fragmented core debris could be mainly
mixtures of fuel and stainless-steel particles with a size distribution. We conducted selfleveling experiments using mixtures of solid particles with different properties to understand
the characteristics of self-leveling phenomena under a wider range of conditions. An
improved empirical model for transient bed height was developed to correlate the experimental data under various conditions of particle mixtures. The developed model reproduces
the self-leveling development of mixed particle beds and those of the homogeneous particle
reasonably.
ABSTRACT
The self-leveling of debris beds is a critical phenomenon to be clarified in the safety assessment of material relocation and decay heat-removal phases in postulated core-disruptive
accidents in sodium-cooled fast reactors. In recent years, we have conducted several series of
experiments using simulant materials to develop an experimental database of self-leveling
processes in particle beds and proposed an empirical model to predict the bed height during
self-leveling. The obtained experimental knowledge and proposed model applicability have
been limited to homogeneous particles, although fragmented core debris could be mainly
mixtures of fuel and stainless-steel particles with a size distribution. We conducted selfleveling experiments using mixtures of solid particles with different properties to understand
the characteristics of self-leveling phenomena under a wider range of conditions. An
improved empirical model for transient bed height was developed to correlate the experimental data under various conditions of particle mixtures. The developed model reproduces
the self-leveling development of mixed particle beds and those of the homogeneous particle
reasonably.
[ self leveling behavior of mixed solid particles in cylindrical bed using gas injection method.pdf ]
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