Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (2): 20601-020601.doi: 10.11889/j.0253-3219.2018.hjs.41.020601

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Numerical simulation of particulate matter injection in the steam generator tube rupture accident

ZHANG Han1,2,3, ZHOU Tao1,2,3, TIAN Xiaorui1,2,3, ZHOU Lanyu4, XIA Bangyang5   

  1. 1. School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, China;
    2. Nuclear Safety and Thermal Power Standardization Institute, North China Electric Power University, Beijing 102206, China;
    3. Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy, North China Electric Power University, Beijing 102206, China;
    4. College of Nuclear Science and Technology, University of South China, Hengyang 421001, China;
    5. State Key Laboratory of Reactor System Design Technology, Chengdu 610041, China
  • Received:2017-03-23 Revised:2017-04-25 Online:2018-02-10 Published:2018-02-06
  • Supported by:
    Supported by National Natural Science Foundation of China (No.50976033), Doctoral Fund of Ministry of Education of China (No.200800791005), Foundation of Key Laboratory of Nuclear Reactor System Design Technology (No.2015BJ0151)

Abstract: [Background] Corrosive particulate matter in high-temperature and pressure fluid in the primary circuit will be injected into the secondary side with while the steam generator tube rupture accident (SGTR) occurs, which could accelerate corrosion of the secondary side. [Purpose] A model was built according to actual size of the steam generator heat transfer tube at Daya Bay nuclear power plant with the code of FLUENT adopted to simulate the injection process. [Methods] The standard k-ε model was used in continuous phase to predict the turbulence variation in the rectangular channel, and mixture model was selected as multiphase model to conduct phase transformation, and the discrete particle model (DPM) was used to track the trajectory of the particulate matter. [Results] The high-temperature speed and concentration field in SGTR appeared near the rupture tube, which would become homogeneous above the tube. There was reflux over the rupture, inducing the particulate matter to flow with the fluid, which would impact the wall of the secondary side, especially that near the rupture tube. Particulate matter aggregation occurs above and back of rupture tube, which might cause deterioration of heat transfer. With the increase of altitude, the influence of the rupture began to diffuse. [Conclusion] It is shown that when there is a steam generator tube rupture accident, the particles can cause abrasion on the wall surface and accelerate corrosion with the movement of flow field.

Key words: Particulate matter, Steam generator tube, Rupture, Injection

CLC Number: 

  • TL334