Analysis of Characteristics for Liquid Entrainment through ADS-4 during a Small Break LOCA in AP1000

Wang Weiwei; Liu Lifang; Meng Zhaoming; Fu Xiaoliang; Tian Wenxi; Yang Yanhua; Su Guanghui; Qiu Suizheng

doi:10.13832/j.jnpe.2015.05.0178

Volume 36 Issue 5

Feb. 2025

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Wang Weiwei, Liu Lifang, Meng Zhaoming, Fu Xiaoliang, Tian Wenxi, Yang Yanhua, Su Guanghui, Qiu Suizheng. Analysis of Characteristics for Liquid Entrainment through ADS-4 during a Small Break LOCA in AP1000[J]. Nuclear Power Engineering, 2015, 36(5): 178-183. doi: 10.13832/j.jnpe.2015.05.0178

Citation:

Wang Weiwei, Liu Lifang, Meng Zhaoming, Fu Xiaoliang, Tian Wenxi, Yang Yanhua, Su Guanghui, Qiu Suizheng. Analysis of Characteristics for Liquid Entrainment through ADS-4 during a Small Break LOCA in AP1000[J]. Nuclear Power Engineering, 2015, 36(5): 178-183. doi: 10.13832/j.jnpe.2015.05.0178

Citation:

Wang Weiwei, Liu Lifang, Meng Zhaoming, Fu Xiaoliang, Tian Wenxi, Yang Yanhua, Su Guanghui, Qiu Suizheng. Analysis of Characteristics for Liquid Entrainment through ADS-4 during a Small Break LOCA in AP1000[J]. Nuclear Power Engineering, 2015, 36(5): 178-183. doi: 10.13832/j.jnpe.2015.05.0178

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Analysis of Characteristics for Liquid Entrainment through ADS-4 during a Small Break LOCA in AP1000

doi: 10.13832/j.jnpe.2015.05.0178

1. Department of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China;
2. State Nuclear Power Software Development Center, Beijing, 100029, China;
3. National Energy Key Laboratory of Nuclear Power Software, Beijing, 100029, China

Received Date: 2015-01-04
Rev Recd Date: 2015-06-10

Available Online: 2025-02-15

Abstract

Abstract

In the ADS blowdown phase during SBLOCAs in AP1000, ADS-4 valves open and vent directly to the containment. If a critical vapor velocity is reached in the two hot legs, the liquid phase can be entrained to the containment through the ADS-4 in the form of liquid droplet. In the present study, the RELAP5 code is modified with the entrainment correlations obtained from the ATLATS test facility which was constructed at OSU in USA. Furthermore, the characteristics of liquid entrainment through ADS-4 during a 5.08cm（2 inch） cold leg SBLOCAs in AP1000 was investigated. Results showed that the current liquid entrainment model in RELAP5 underestimated the liquid entrainment quantity through ADS-4 and resulted in a non-conservative safety analysis results.
- AP1000,
- SBLOCA,
- ADS-4,
- Liquid entrainment,
- RELAP5