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http://dx.doi.org/10.7733/jnfcwt.2020.18.2(E).327

CFD Analysis to Suppress Condensate Water Generated in Gas Sampling System of HANARO  

Cho, SungHwan (Chungnam National University)
Lee, JongHyeon (Chungnam National University)
Kim, DaeYoung (Korea Atomic Energy Research Institute)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.18, no.2_spc, 2020 , pp. 327-336 More about this Journal
Abstract
The high-flux advanced neutron application reactor (HANARO) is a research reactor with thermal power of 30 MW applied in various research and development using neutrons generated from uranium fission chain reaction. A degasifier tank is installed in the ancillary facility of HANARO. This facility generates gas pollutants produced owing to internal environmental factors. The degasifier tank is designed to maintain the gas contaminants below acceptable levels and is monitored using an analyzer in the gas sampling panel. If condensate water is generated and flows into the analyzer of the gas sampling panel, corrosion occurs inside the analyzer's measurement chamber, which causes failure. Condensate water is generated because of the temperature difference between the degasifier tank and analyzer when the gas flows into the analyzer. A heating system is installed between the degasifier tank and gas sampling panel to suppress condensate water generation and effectively remove the condensate water inside the system. In this study, we investigated the efficiency of the heating system. In addition, the variations in the pipe temperature and the amount of average condensate water were modeled using a wall condensation model based on the changes in the fluid inlet temperature, outside air temperature, and heating cable-setting temperature.
Keywords
HANARO (high-flux advanced neutron application reactor); Condensate water; CFD (computational fluid dynamics); Wall condensation model; Heating system;
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  • Reference
1 Korea Atomic Energy Research Institute, "FTL: The High Temperature Function Test Procedures before Loading the Nuclear Fuel (Comprehensive Test Procedures of Letdown, Makeup and Purification System) Rev. 1", KAERI Report, HAN-FL-S-062-DO-K104 (2008).
2 Korea Atomic Energy Research Institute, "HANARO SAR", KAERI Technical Report, KAERI/TR-710/1996 (2020).
3 Korea Atomic Energy Research Institute, "HANARO SAR Chapter 11.7 FTL", KAERI Technical Report, KAERI/TR-3898/2009 (2009).
4 S.H. Cho, M.S. Kim, H.Y. Choi, and W.H. In, "Research on How to Remove Efficiently the condensate water of Sampling System", Proc. of the Korean Nuclear Society 2015 Autumn Meeting, October 29-30, P08F01, Gyeongju (2015).
5 Korea Atomic Energy Research Institute, "FTL: The Room Temperature Function Test Procedures (Sampling System Test Procedures)", KAERI Report, HANFL- S-062-DO-K008 (2007).
6 G. Zschaeck, T. Frank, and A.D. Burns, "CFD modelling and validation of wall condensation in the presence of non-condensable gases", Nucl. Eng. Des., 279, 137-146 (2014).   DOI
7 M. Lejon, "Wall Condensation Modelling in Convective Flow", Kungliga Tekniska Hogskolan School of Industrial Engineering and Management, Master of Science Thesis EGI-2013-092MSC EKV970, Stockholm (2013).
8 ANSYS CFX-Solver Theory Guide, R17, 72-75, 171-176, 183-191, ANSYS, Inc., Canonsburg, PA., Jan. 2016.
9 CFD Online, Mar. 28, 2014. "Dimensionless wall distance (y plus)", Accessed Jul. 27 2020. Available from: https://www.cfd-online.com/Wiki/Dimensionless_wall_ distance_(y_plus).
10 Korea Atomic Energy Research Institute, "LMP Ion Exchanger etc. equipment capacity statement - purification filter, resin filter, mixed demineralizer, degasifier tank, chemical additional tank Rev. 3", KAERI Report, HAN-FL-E-240-DC-H003 (2004).
11 S.Z. Kuhn, V.E. Schrock, and P.F. Peterson, "An investigation of condensation from steam-gas mixtures flowing downward inside a vertical tube", Nucl. Eng. Des., 177(1-3), 53-69 (1997).   DOI