Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Study of Thermal Stratification into Leaking Flow in the Nuclear Power Plant, Emergency Core Coolant System

원자로 비상 냉각재 누설에 의한 열성층의 비정상 특성에 관한 연구

  • Han Seong-Min (Graduate School, Department of Mechanical Engineering, Korea University) ;
  • Choi Yong-Don (Department of Mechanical Engineering, Korea University) ;
  • Park Min-Soo (Graduate School, Department of Mechanical Engineering, Korea University)
  • Published : 2006.03.01
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Abstract

In the nuclear power plant, emergency core coolant system (ECCS) is furnished at reactor coolant system (RCS) in order to cool down high temperature water in case of emergency. However, in this coolant system, thermal stratification phenomenon can be occurred due to coolant leaking in the check valve. The thermal stratification produces excessive thormal stresses at the pipe wall so as to yield thermal fatigue crack (TFC) accident. In the present study, when the turbulence penetration occurs in the branch pipe, the maximum temperature differences of fluid at the pipe cross-sections of the T-branch with thermal stratification are examine.

Keywords

References

  1. Thermal Stresses in Piping Connected to Reactor Coolant Systems, 1988, United States Nuclear Regulatory Commission, Bulletin No. 88-08
  2. EPRl, Thermal Stratification, Cycling and Striping (TASCS), TR-I03581, 1994
  3. Hong, S.-W., Choi, Y. D., Park, M.-S. and Seo, J. - H., 2001, Numerical analysis of thermal stratification into leaking flow in a T branch, Trans. B, Proc. of Fall Conf. of KSME, pp.729-734
  4. Hong, S.-W., Choi, Y. D. and Park, M.-S., 2003, The effect of turbulence on the thermal stratification phenomenon caused by leaking flow in a T-branch of square crosssection, Korean J. of Air-Conditioning and Refrigeration, Vol. 15, No.3, pp.239-245
  5. Choi, Y. D., Hong, S. W. and Park, M. S., 2003, The effect of turbulence penetration on the thermal stratification phenomenon caused by coolant leaking in a T-branch of square cross-section, International J. of Air-Conditioning and Refrigeration, Vol.11, No.2, pp. 51-60
  6. Song, D.-I., Choi, Y. D. and Park, M.-S., 2001, Experimental research for identification of thermal stratification phenomena in the nuclear powerplant emergency core coolant system (ECCS), Trans. B, Proc. of Fall Conf. of KSME, pp.735-740
  7. Park, M._H., Kim, K.-C., Lee, S.-K., Kim, T.-R. and Lee, S.-C., 2002, Proc. of Summer Conf. of SAREK, pp.785-790