Abstract
Since the Fukushima nuclear power plant accident, the nuclear safety experts devote a number of efforts to explore the potential risk of hydrogen detonation and measures for the mitigation of hydrogen safety during a severe accident in the nuclear power plant. A series of experiments have been performed to investigate the behavior of hydrogen distribution during a severe accident in the nuclear power plant. This study aims to investigate the gaseous stratification break-up phenomenon in the presence of a vertical gas fountain on the top of containment using Code_Saturne. The computed results not only analyze the flow field of the gas and the density distribution in the containment, but also measure the adequacy of Code_Saturne concerning the multi-component gas flow calculation.
Highlights
A severe accident occurred as a result of huge earthquake at the Fukushima Daiichi Nuclear Power Plant, located in the East Pacific Ocean in Japan, on March 11, 2011 (IAEA, 2015)
The research on hydrogen safety in the containment of nuclear power plants during a severe accident has become a hot topic for the nuclear safety experts
Taking the LOCA accident of the pressurized water reactor as an example, for the pressurized water reactor which using vertical steam generator and higher containment, the main circuit is located in the lower position of the containment while the blasting valve of the pressure regulator relief box is located in the higher position
Summary
A severe accident occurred as a result of huge earthquake at the Fukushima Daiichi Nuclear Power Plant, located in the East Pacific Ocean in Japan, on March 11, 2011 (IAEA, 2015). In the actual containment of nuclear power plant, there are several phenomena that may break the gas stratification during severe accident such as injection of a sprinkler system, hydrogen recombiner and gas injection, etc. The steam will condensate on the wall, which leads to passive heat transfer and mass transfer It will cause buoyancy-driven flow and exacerbate gas mixing. It does not Numerical Investigation on Air Fountain Experiment mean that the hydrogen stratification will not occur during a severe accident. This phenomenon has already been observed in the PHDR(Projekt HDR-Sicherheitsprogramm) experiment (IAEA-TECDOC-1661, 2011)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
