Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (5): 050602 doi: 10.13538/j.1001-8042/nst.26.050602

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Framework analysis of fluoride salt-cooled high temperature reactor#br# probabilistic safety assessment

ZUO Jia-Xu ,1 JING Jian-Ping ,1 BI Jin-Sheng ,1 SONG Wei ,1 CHEN Kun 2   

  1. 1The Nuclear and Radiation Safety Center, Ministry of Environmental Protection, Beijing 100082, China
    2Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Contact: SONG Wei E-mail:sv98@163.com
  • Supported by:

    Supported by the Chinese Academy of Science Strategy Precursor Science and Technology Project (No. XDA0205050)

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ZUO Jia-Xu, JING Jian-Ping, BI Jin-Sheng, SONG Wei, CHEN Kun . Framework analysis of fluoride salt-cooled high temperature reactor#br# probabilistic safety assessment.Nuclear Science and Techniques, 2015, 26(5): 050602     doi: 10.13538/j.1001-8042/nst.26.050602

Abstract:

Probabilistic safety assessment (PSA) is important in nuclear safety review and analysis. Because the design and physics of the fluoride salt-cooled high temperature reactor (FHR) differ greatly from the pressurized water reactor (PWR), the methods and steps of PSA in FHR should be studied. The high-temperature gascooled reactor (HTR-PM) and sodium-cooled fast reactors have built the PSA framework, and the framework to finish the PSA analysis. The FHR is compared with the PWR, HTR-PM and sodium-cooled fast reactors from the physics, design and safety. The PSA framework of FHR is discussed. In the FHR, the fuel and coolant combination provides large thermal margins to fuel damage (hundreds of degrees centigrade). The tristructuralisotropic (TRISO) as the fuel is independent in FHR core and its failure is limited for the core. The core damage in Level 1 PSA is of lower frequency. Levels 1 and 2 PSA are combined in the FHR PSA analysis. The initiating events analysis is the beginning, and the source term analysis and the release types are the target. Finally, Level 3 PSA is done.

Key words: Fluoride salt-cooled high temperature reactor (FHR), Probabilistic safety assessment (PSA), Framework of PSA