Experimental Study on the Determination of Heat Transfer Coefficient for the KURT

KURT 내 열전달계수 결정에 관한 실험적 연구

  • 윤찬훈 (인하대학교 환경공학과) ;
  • 권상기 (한국원자력연구원 고준위폐기물처분 연구부) ;
  • 김진 (인하대학교 사회기반시스템공학부)
  • Published : 2009.12.31

Abstract

In cases of high-level radioactive waste repositories, heat load is apparent by radioactive waste decay. The safety of a waste repository would be influenced by changing circumstances caused by heat transfer through rock. Thus, a ventilation system is necessary to secure the waste repository. The first priority for building an appropriate ventilation system is completing a computer simulation research with thermal rock properties and a heat transfer coefficient. In this study, the heat transfer coefficient in KURT was calculated using the measurement of inner circumstance factors that include dry bulb and wet bulb temperature, rock surface temperature, and barometric pressure. The heater that is 2 m in length and 5 kw in capacity heats the inside of rock in the research module by $90^{\circ}C$. As a result of determining the heat transfer coefficient in the heating section, the changes of heat transfer coefficient were found to be a maximum of 7.9%. The average heat transfer coefficient is approximately 4.533 w/$m^2{\cdot}K$.

Keywords

High-level Radioactive Waste;Heat Transfer Coefficient;KURT;Rock Surface Temperature;Natural Convection

References

  1. 김진, 권상기, 2005, 한국형 방사성 폐기물 처분장을 위한 환기시스템 전략, Journal of the Korean Radioactive Waste Society, vol. 3(2), pp. 135-148
  2. Churchill, S.W, 1983, Heat Exchanger Design Handbook, Hemisphere, Free convection around immersed bodies. Chapter 2.5.7
  3. 권상기, 조원진, 2007, 고준위폐기물 처분연구를 위한 지하처분연구시설에서의 암석역학 관련 연구, Journal of Korean Society for Rock Mechanics, Tunnel & Underground space, vol. 17, No. 1, pp. 43-55
  4. Roald Akberov, Darrell W.Pepper, Yitung Chen, 2003, Modeling convective heat transfer around a waste cask stored in the YUCCA mountain repository, The 6th ASME-JSME Thermal engineering Joint Conference, Hawaii, U.S.A
  5. 이규상, 이정인, 2004, 지하암반 냉동저장고 주변의 온도 분포 예측을 위한 수치해석, Journal of Korean Society for Rock Mechanics, Tunnel & Underground space, vol. 14, No. 4, pp. 287-294
  6. 이창우, 1996, 암반 열물성과 지하공간 환경분석 연구, Journal of Korean Society for Rock Mechanics, Tunnel & Underground space, vol. 6, pp. 335-341
  7. Yun Lee, Myoung-Sung Choi, Seong-Tae Yi, Jin-Keun Kim, 2009, Experimental study on the convective heat transfer coefficient of early-age concrete, Cement & Concrete Composites, vol. 31. pp. 60-71 https://doi.org/10.1016/j.cemconcomp.2008.09.009
  8. 안형준, 이희근, 1997, 암석의 온도의존성을 고려한 열-수리-역학적 상호작용의 수치해석적 연구, Journal of Korean Society for Rock Mechanics, Tunnel & Underground space, vol. 7, pp. 13-19