Improvement and validation of the wall heat transfer package of RELAP5/MOD3.3
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Improvement and validation of the wall heat transfer package of RELAP5/MOD3.3
- 发表刊物：
- Annals of Nuclear Energy
- 摘要：
- The process of energy transfer from heat structure to control volume is determined by the wall-to-fluid
heat transfer package, which is crucial for nuclear reactor safety analysis codes. The current logic for
selection of heat transfer modes of RELAP5/MOD3.3 code is too complex and may result in incorrect heat
transfer mode judgment. Also, the narrow application scope of film boiling heat transfer correlations may
result in large errors in film boiling region which is of paramount importance for the predicted peak clad
temperatures during hypothetical LB-LOCAs in PWRs. In this study, a new heat transfer package has been
developed and incorporated into the RELAP5/MOD3.3 code. Differing from the original package, the modified one consists of twelve heat transfer modes and proposes a new logic for selection of heat transfer
modes. For each mode, the models in the existing safety analysis codes and the leading models in literature have been reviewed in order to determine the best model which can easily be applicable to the
RELAP5/MOD3.3 code. Particularly (1) a new package of heat transfer correlations are produced; (2) a
new logic for selection of film boiling and transition boiling heat transfer modes is proposed which
use minimum film boiling temperature and critical heat flux temperature as distinguished points. The
modified code has been validated by comparing the analysis results with available experimental data
from tube post dryout experiments and loss-of-fluid test (LOFT) facility. The calculation results showed
that the improved package could better predict the experimental phenomena with higher prediction
accuracy
- 合写作者：
- Wu Pan, Xiong Xiaofei, Shan Jianqiang, Gou Junli, Zhang Bin, Zhang Bo
- 卷号：
- 310
- 页面范围：
- 418-428
- 是否译文：
- 否
- 发表时间：
- 2016-11-01