Abstract
Employing a gallium-based passive decay heat removal system (PDHRS), which enables the use of water as an ultimate heat sink, was proposed for the UCFR-100. The gallium-based PDHRS has replaced the previous sodium-based PDHRS. To evaluate the safety and thermal performance of the gallium-based PDHRS, safety analysis and heat exchanger tests were performed. The safety analysis, using both deterministic and probabilistic analyses methods, confirmed the unique safety feature of the UCFR-100. The transient analysis for design basis accidents showed the rapid cooling characteristic of the gallium-based PDHRS of the UCFR-100. In addition, compared with the sodium-based PDHRS, the probabilistic safety analysis, using the level-1 Probabilistic Safety Assessments method, showed the significant decrease of the minimal cut sets and the significant reduction of the failure probability of the gallium-based PDHRS of the UCFR-100. Finally, compared with the sodium-to-air feature in the sodium-based PDHRS, the gallium-to-water heat exchanger in the gallium-based PDHRS enhanced the heat transfer performance and facilitated economic advantages to the entire system. In conclusion, the gallium-water PDHRS represented risk reduction of the entire reactor system with the effective thermal performance. Copyright © 2016 John Wiley & Sons, Ltd.
Sign-in/Register to access full text options 
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.
