Program development and preliminary CHF characteristics analysis for natural circulation loop under moving condition

Minyang Gui; Wenxi Tian; Di Wu; Ronghua Chen; G.H. Su; Suizheng Qiu

doi:https://doi.org/10.1016/j.net.2020.07.025

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자료유형: 학술저널

저자정보: Minyang Gui (Xi’an Jiaotong University) Wenxi Tian (Xi’an Jiaotong University) Di Wu (Xi’an Jiaotong University) Ronghua Chen (Xi’an Jiaotong University) G.H. Su (Xi'an Jiaotong University) Suizheng Qiu (Xi'an Jiaotong University)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제53권 제2호

발행연도: 2021.2

수록면: 446 - 454 (9page)

DOI: https://doi.org/10.1016/j.net.2020.07.025

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Critical heat flux (CHF) has traditionally been evaluated using look-up tables or empirical correlations fornuclear power plants. However, under complex moving condition, it is necessary to reconsider the CHFcharacteristics since the conventional CHF prediction methods would no longer be applicable. In thispaper, the additional forces caused by motions have been added to the annular film dryout (AFD)mechanistic model to investigate the effect of moving condition on CHF. Moreover, a theoretical model ofthe natural circulation loop with additional forces is established to reflect the natural circulation characteristicsof the loop system. By coupling the system loop with the AFD mechanistic model, a CHFprediction program called NACOM for natural circulation loop under moving condition is developed. Theeffects of three operating conditions, namely stationary, inclination and rolling, on the CHF of the loopare then analyzed. It can be clearly seen that the moving condition has an adverse effect on the CHF inthe natural circulation system. For the calculation parameters in this paper, the CHF can be reduced by25% compared with the static value, which indicates that it is important to consider the effects of movingcondition to retain adequate safety margin in subsequent thermal-hydraulic designs.

#Critical heat flux #Natural circulation #Moving condition #Program development #NACOM

참고문헌 (28)

참고문헌 신청

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