Analysis of Downcomer Channel Thermal-Hydraulic Phenomena of PCCS Outside Cooling

Li Le; Li Cheng; Zhang Yajun; Yi Xiongying

doi:10.13832/j.jnpe.2016.02.0043

Volume 37 Issue 2

Feb. 2025

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Li Le, Li Cheng, Zhang Yajun, Yi Xiongying. Analysis of Downcomer Channel Thermal-Hydraulic Phenomena of PCCS Outside Cooling[J]. Nuclear Power Engineering, 2016, 37(2): 43-47. doi: 10.13832/j.jnpe.2016.02.0043

Citation:

Li Le, Li Cheng, Zhang Yajun, Yi Xiongying. Analysis of Downcomer Channel Thermal-Hydraulic Phenomena of PCCS Outside Cooling[J]. Nuclear Power Engineering, 2016, 37(2): 43-47. doi: 10.13832/j.jnpe.2016.02.0043

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Analysis of Downcomer Channel Thermal-Hydraulic Phenomena of PCCS Outside Cooling

doi: 10.13832/j.jnpe.2016.02.0043

Li Le^1,2,3,
Li Cheng^{2
,
,},
Zhang Yajun¹,
Yi Xiongying³

1. INET of Tsinghua University, Beijing, 100084, China;
2. State Nuclear Power Technology Research & Development Center, Beijing, 102209, China;
3. Unit 92609, Beijing, 100077, China

Received Date: 2015-09-21
Rev Recd Date: 2015-12-20

Available Online: 2025-02-15

Abstract

Abstract

The structures simplified from the outside cooling of the passive containment cooling system（PCCS）, was numerically simulated, with the aim to study its effects on the residual heat removal during nuclear accidents. Characteristics of the PCCS outside cooling only with natural forces driving were obtained, based on which the coupled heat transfers among the downcomer channel, the baffle plate and the riser channel were discussed. Finally, the width of the downcomer channel on the PCCS outside cooling was analyzed, and it indicated that the downcomer channel should be considered for long vertical section.
- PCCS,
- Outside cooling,
- Downcomer channel,
- Thermal-hydraulic