Validation of intermediate heat and decay heat exchanger model in MARS-LMR with STELLA-1 and JOYO tests
| Autor: | Jonggan Hong, Jaehyuk Eoh, Kwi-Seok Ha, Hae-Yong Jeong, Sujin Yeom, Chiwoong Choi |
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| Rok vydání: | 2016 |
| Předmět: |
Nuclear and High Energy Physics
Materials science 020209 energy Mechanical Engineering Nuclear engineering Thermodynamics 02 engineering and technology Mars Exploration Program Nuclear Energy and Engineering Heat exchanger Heat transfer 0202 electrical engineering electronic engineering information engineering Heat transfer model Bypass flow General Materials Science Code Validation Decay heat Safety Risk Reliability and Quality Waste Management and Disposal Root-mean-square deviation |
| Zdroj: | Nuclear Engineering and Design. 308:269-282 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2016.08.044 |
| Popis: | The MARS-LMR code has been developed by the Korea Atomic Energy Research Institute (KAERI) to analyze transients in a pool-type sodium-cooled fast reactor (SFR). Currently, KAERI is developing a prototype Gen-IV SFR (PGSFR) with metallic fuel. The decay heat exchangers (DHXs) and the intermediate heat exchangers (IHXs) were designed as a sodium-sodium counter-flow tube bundle type for decay heat removal system (DHRS) and intermediate heat transport system (IHTS), respectively. The IHX and DHX are important components for a heat removal function under normal and accident conditions, respectively. Therefore, sodium heat transfer models for the DHX and IHX heat exchangers were added in MARS-LMR. In order to validate the newly added heat transfer model, experimental data were obtained from the JOYO and STELLA-1 facilities were analyzed. JOYO has two different types of IHXs: type-A (co-axial circular arrangement) and type-B (triangular arrangement). For the code validation, 38 and 39 data points for type A and type B were selected, respectively. A DHX performance test was conducted in STELLA-1, which is the test facility for heat exchangers and primary pump in the PGSFR. The DHX test in STELLA-1 provided eight data points for a code validation. Ten nodes are used in the heat transfer region is used, based on the verification test for the heat transfer models. RMS errors for JOYO IHX type A and type B of 19.1% and 4.3% are obtained, respectively. It was reported that a bypass flow of 20% was allowed in type A test. When the bypass flow model was added to MARS-LMR, the RMS error for type A reduced to 12.6%. The RMS error for the STELLA-1 DHX was estimated to be 3.5%. Through the comparative studies with various alternative heat transfer models in the tube and shell-side, the base heat transfer model in MARS-LMR was found to give good prediction for the STELLA-1 and JOYO experiment results. |
| Databáze: | OpenAIRE |
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