<p>A Chinese Small Module Reactor (hereinafter referred to as CSMR) is a small modular PWR with numerous evolutionary design concepts. It’s technically of high security, and equipped with greatly simplified system and equipment with the significantly less number of equipment than that of commercial reactor. Therefore, whether the generic ignition frequency of the nuclear power plant obtained based on commercial reactor fire events data can be applied in CSMR should be discussed. At present, the generic ignition frequency of NPP based on SMR has not yet been developed.</p><p>The equipment number of Small Modular Reactor (SMR) is significantly less than that of commercial reactor, and accordingly, the number of fixed fire ignition sources and the ignition frequency are much less. Based on the analysis of the design characteristics of Small Modular Reactor, this paper develops a preliminary research and innovation on the internal fire ignition frequency evaluation method of Small Modular Reactor, and implements a sensitivity analysis on the commercial reactor ignition frequency methods. The result indicates the fire ignition frequency would increase 51% if the NUREG/CR-6850 generic ignition frequency data are adopted. However, the design characteristics of SMR can be better reflected in this innovative method, which needs more attention in the future.</p>

Research on Internal Fire Ignition Frequency of Fire Probability Safety Analysis in Small Module Reactor

Paper Proceedings: https://asmedigitalcollection.asme.org/ICONE/ICONE28/volume/85246

2021 28th International Conference on Nuclear Engineering (ICONE28)

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.