Analysis of 4-inch cold leg top-slot break LOCA in ATLAS experimental facility using MARS-KS
Author:
Jeong Hyunjoon1, Kim Taewan12ORCID
Affiliation:
1. Department of Safety Engineering , Incheon National University , 119, Academy-ro, Yeonsu-gu, 22012 Incheon , Republic of Korea 2. Nuclear Safety Research Institute, Incheon National University , 119, Academy-ro, Yeonsu-gu, 22012 Incheon , Republic of Korea
Abstract
Abstract
Korea Atomic Energy Research Institute (KAERI) has operated an integral effect test facility, the Advanced Thermal-Hydraulic Test Loop for Accident Simulation (ATLAS) with reference to the Advanced Power Reactor 1400 MW (APR1400) for transient and design basis accidents (DBAs) simulation. An experiment for a 4-inch cold leg top-slot break was performed at ATLAS to resolve a safety issue that the loop seal reformation (LSR) of APR1400 could lead to the increase of peak cladding temperature. In addition, the experimental data has been utilized to validate system codes within a framework of domestic standard problem (DSP) program organized by KAERI in collaboration with Korea Institute of Nuclear Safety (KINS). In this study, the experiment has been analyzed by thermal-hydraulic system analysis code, MARS-KS 1.5 and a comparison with experimental and calculation results has been performed. Since the top-slot break is not a typical break geometry for safety analyses, this study aims at examining the applicability of MARS-KS to the top-slot break accident where the LSR occurs repeatedly. The results revealed that overall physical behavior during the accident was predicted by the code, appropriately. MARS-KS showed the excursion of the peak cladding temperature because of the LSR as in experiment. It has been confirmed that the core integrity was maintained because the temperature excursion by the LSR was not large enough to alter the acceptance criteria. In addition, it is presented the results of the sensitivity analysis of parameter that affect the figure of merits.
Funder
Incheon National University
Publisher
Walter de Gruyter GmbH
Subject
Safety, Risk, Reliability and Quality,General Materials Science,Nuclear Energy and Engineering,Nuclear and High Energy Physics,Radiation
Reference11 articles.
1. Choi, K.Y., Euh, D.J., Kwon, T.S., Park, H.S., and Jeong, J.J. (2005). MARS input data for 8% steady-state calculation of the ATLAS. Korea Atomic Energy Research Institute (KAERI), KAERI/TR-3046/2005, Daejeon, Republic of Korea. 2. Choi, K.Y., Kang, K.H., Kwon, T.S., Kim, Y.S., Kim, J., Moon, S.K., Park, Y.S., Bae, B.U., Song, C.H., Yi, S.J., et al.. (2014). Scaling analysis report of the ATLAS facility. Korea Atomic Energy Research Institute (KAERI), KAERI/TR-5465/2014, Daejeon, Republic of Korea. 3. Henry, R.E., Fauske, H.K., and McComas, S.T. (1971). Two-phase critical flow at low qualities, part I: experimental. Nucl. Sci. Eng. 41: 79–91, https://doi.org/10.13182/NSE70-A20366. 4. Ishii, M. and Kataoka, I. (1983). Similarity analysis and scaling criteria for LWRs under single phase and two-phase natural circulation. Argonne National Laboratory (ANL), ANL-83-32, Argonne, IL, United States. 5. Kim, Y.S. and Cho, S. (2014). An experimental investigation of loop seal clearings in SBLOCA tests. Ann. Nucl. Energy 63: 721–730, https://doi.org/10.1016/j.anucene.2013.09.014.
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