This study aims to assess the multi-dimensional fluid model of MARS-KS (KINS standard version of MARS) code. The UPTF upper plenum injection test (UPI Test, Test No. 20) is modeled with the MARS in order to assess the code capability for predicting the multi-dimensional behavior of UPI water in the upper plenum during a reflood phase of large break loss-of-coolant accident. The coolant piping is simulated by one-dimensional components, while the reactor vessel is modeled by the cylindrical multi-dimensional component with five rings in radial direction, eight sectors in azimuthal direction, and fourteen axial levels. The results of MARS calculation are compared with the experimental data of UPTF test, particularly the ECC downflow area in the core flow area, the water carryover rate to hot legs, and the water level distribution in upper plenum. The calculation results indicate that the size of the downflow area is about 16.7% of the core flow area, comparable to the result of 10% in UPTF test. The MARS overestimates the amount of water carryover to the hot legs. As seen in the UPTF UPI test, the collapsed water level formed in the upper plenum is uniform at the entire core flow area, except at the down flow region where more water accumulates. These results demonstrate that MARS can provide a reasonable prediction of multi-dimensional behavior of UPI water in the upper plenum.
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17th International Conference on Nuclear Engineering
July 12–16, 2009
Brussels, Belgium
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-4353-6
PROCEEDINGS PAPER
Multidimensional Analysis of UPTF Upper Plenum Injection Test With MARS-KS Code Available to Purchase
Kyung Won Lee,
Kyung Won Lee
Korea Institute of Nuclear Safety (KINS), Daejeon, Republic of Korea
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Yong Jin Cho,
Yong Jin Cho
Korea Institute of Nuclear Safety (KINS), Daejeon, Republic of Korea
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Seung Hoon Ahn
Seung Hoon Ahn
Korea Institute of Nuclear Safety (KINS), Daejeon, Republic of Korea
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Kyung Won Lee
Korea Institute of Nuclear Safety (KINS), Daejeon, Republic of Korea
Yong Jin Cho
Korea Institute of Nuclear Safety (KINS), Daejeon, Republic of Korea
Seung Hoon Ahn
Korea Institute of Nuclear Safety (KINS), Daejeon, Republic of Korea
Paper No:
ICONE17-75638, pp. 539-544; 6 pages
Published Online:
February 25, 2010
Citation
Lee, KW, Cho, YJ, & Ahn, SH. "Multidimensional Analysis of UPTF Upper Plenum Injection Test With MARS-KS Code." Proceedings of the 17th International Conference on Nuclear Engineering. Volume 3: Thermal Hydraulics; Current Advanced Reactors: Plant Design, Construction, Workforce and Public Acceptance. Brussels, Belgium. July 12–16, 2009. pp. 539-544. ASME. https://doi.org/10.1115/ICONE17-75638
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