Loading...

Simulation of Steam Bubble Collapse Induced Water Hammer (SBCIWH) in the Bushehr NPP Deaerator

Saemi, Amir | 2017

658 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49395 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Ghofrani, Mohammad Bagher
  7. Abstract:
  8. Due to nuclear power plants’ growing roll in providing energy, analyzing probable accidents and their prevention is of vital importance. The thermal-hydraulic shock accident which happened in Bushehr nuclear power plant deaerator has been simulated in this study. Steam bubble collapsing which takes place in two phase medium by mixing steam and subcooled water leads to this kind of shock causing financial and physical irreparable damage in nuclear power plants. For carrying out this simulation, first an steady state model of the deaerator was run using RELAP5 code and then using this model and other plant’s data such as the ropert of the accident and plant’s Final Safety Analysis Report (FSAR), the shock was simulated. The main body of the deaerator was modeled using a Pipe component in RELAP5 allowing a general pressure profile being generated through the body at any given time during the accident. All water and steam inlets and outlets were considered as boundry conditions in this simulation. After the steady state modelling was finished, for validating the model, pressure, temperature, and water level profiles were driven, all of which were in accordance with the mentioned values in the accident report. An assessment of the capability of system code RELAP5/MOD3.3 to model steam bubble collapse induced water hammer with experimental data was also done to make sure that RELAP5 has this capability. After that, by applying accident conditions, pressure and other parameters profile were driven. The resulted pressure being the most important parameter in this type of accidents was validated and benchmarked with both analytical and experimental data which stated that simulation had been done correctly. At last, the imposed forces on the system supports were also calculated
  9. Keywords:
  10. Two Phase Medium ; RELAP5 Code ; Deaeration ; Bushehr Nuclear Power Plant ; Thermal-Hydraulic Shock ; Steam Bubble Collapse Induced Water Hammer

 Digital Object List

 Bookmark

No TOC