Study on dryout heat flux of axial stratified debris bed under top-flooding
The coolability of the debris bed with a simulant of solidified corium is experimentally studied, focusing on the effects of the structure of the axial stratified debris bed on the dryout heat flux (DHF). DHF was obtained for the four structures with different particle sizes for the axial stratified...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-02-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573323004953 |
| _version_ | 1827368337513906176 |
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| author | Wenbin Zou Lili Tong Xuewu Cao |
| author_facet | Wenbin Zou Lili Tong Xuewu Cao |
| author_sort | Wenbin Zou |
| collection | DOAJ |
| description | The coolability of the debris bed with a simulant of solidified corium is experimentally studied, focusing on the effects of the structure of the axial stratified debris bed on the dryout heat flux (DHF). DHF was obtained for the four structures with different particle sizes for the axial stratified debris bed under top flooding. The experimental results show that the dryout position of the axial stratified debris bed is formed at the stratified interface indicated by the temperature rise, and the DHF of the axial stratified bed is much lower than that of the homogeneous bed packed with the upper small particles. To predict the dryout heat flux of the stratified debris beds, by considering the properties of the mixed area, a one-dimensional dryout heat flux model of the porous medium is derived from a water and vapor momentum equation for porous medium, two-phase permeability modifications, interfacial drag, and the correlation between capillary pressure and liquid saturation and verified with the experimental data. The modified model can give reasonable results under different structures. |
| first_indexed | 2024-03-08T09:29:54Z |
| format | Article |
| id | doaj.art-5c3e28943e1b4589af06b6df0a30cfe7 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-03-08T09:29:54Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-5c3e28943e1b4589af06b6df0a30cfe72024-01-31T05:42:51ZengElsevierNuclear Engineering and Technology1738-57332024-02-01562636643Study on dryout heat flux of axial stratified debris bed under top-floodingWenbin Zou0Lili Tong1Xuewu Cao2School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaCorresponding author. School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Rd, Shanghai, 200240, China.; School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaSchool of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaThe coolability of the debris bed with a simulant of solidified corium is experimentally studied, focusing on the effects of the structure of the axial stratified debris bed on the dryout heat flux (DHF). DHF was obtained for the four structures with different particle sizes for the axial stratified debris bed under top flooding. The experimental results show that the dryout position of the axial stratified debris bed is formed at the stratified interface indicated by the temperature rise, and the DHF of the axial stratified bed is much lower than that of the homogeneous bed packed with the upper small particles. To predict the dryout heat flux of the stratified debris beds, by considering the properties of the mixed area, a one-dimensional dryout heat flux model of the porous medium is derived from a water and vapor momentum equation for porous medium, two-phase permeability modifications, interfacial drag, and the correlation between capillary pressure and liquid saturation and verified with the experimental data. The modified model can give reasonable results under different structures.http://www.sciencedirect.com/science/article/pii/S1738573323004953Severe accidentCoolabilityDryout heat fluxStratified debris bed |
| spellingShingle | Wenbin Zou Lili Tong Xuewu Cao Study on dryout heat flux of axial stratified debris bed under top-flooding Nuclear Engineering and Technology Severe accident Coolability Dryout heat flux Stratified debris bed |
| title | Study on dryout heat flux of axial stratified debris bed under top-flooding |
| title_full | Study on dryout heat flux of axial stratified debris bed under top-flooding |
| title_fullStr | Study on dryout heat flux of axial stratified debris bed under top-flooding |
| title_full_unstemmed | Study on dryout heat flux of axial stratified debris bed under top-flooding |
| title_short | Study on dryout heat flux of axial stratified debris bed under top-flooding |
| title_sort | study on dryout heat flux of axial stratified debris bed under top flooding |
| topic | Severe accident Coolability Dryout heat flux Stratified debris bed |
| url | http://www.sciencedirect.com/science/article/pii/S1738573323004953 |
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