熔堆事故下有机碘形成、滤除排放与蒸汽环境模拟

Abstract

Abstract: When nuclear power plant coolant loss accident leads to core melting, radioactive iodine in nuclear fuel will be released into the containment with coolant and will form high temperature and high pressure steam environment. Under natural action and artificial intervention (spraying, etc.), the physical and chemical forms of iodine gradually change, forming a gaseous iodine environment dominated by organic iodine in the long-term stage. In this paper, the formation and filtration process of organic iodine in accident condition of nuclear power plant are described and the simulation of organic iodine vapor environment is carried out. By quantitative vaporization and multiple control, a wide-range of accurate simulation of organic iodine vapor environment represented by typical accident operating parameters (130 ℃, 399 kPa, 95%RH) was achieved. The simulation of iodine-containing steam environment can be used for the detection of organic iodine filtration performance of in-service adsorbents and the development of new adsorbents, which is of great significance in organic iodine filtration and controlled discharge under accident conditions at nuclear power plant.

Key words: accident conditions, organic iodine filtration, environmental simulation, high temperature steam, humidity monitoring

CLC Number:

TL732

GAO Linfeng, LIANG Junqin, YAO Yanyan, ZHAO Gaoxin, CHEN Xin, CHANG Sen, LI Xin. Organic iodine formation, filtration emission, and steam environment simulation under core melt accident[J].RADIATION PROTECTION, 2023, 43(6): 576-585.

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Organic iodine formation, filtration emission, and steam environment simulation under core melt accident

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