熔堆事故下有机碘形成、滤除排放与蒸汽环境模拟

辐射防护 ›› 2023, Vol. 43 ›› Issue (6): 576-585.

熔堆事故下有机碘形成、滤除排放与蒸汽环境模拟

高琳锋¹, 梁俊钦², 姚岩岩³, 赵高昕³, 陈欣¹, 常森¹, 李昕¹

1.中国辐射防护研究院,太原 030006;
2.中广核惠州核电有限公司,广东惠州 516003;
3.阳江核电有限公司,广东阳江 529941

收稿日期:2023-05-04 出版日期:2023-11-20 发布日期:2023-12-25
作者简介:高琳锋(1985—),男,2008年毕业于山西大同大学应用化学专业,2021年毕业于西北工业大学凝聚态物理专业,获硕士学位,副研究员。E-mail:gaolinfeng2008@126.com

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

GAO Linfeng¹, LIANG Junqin², YAO Yanyan³, ZHAO Gaoxin³, CHEN Xin¹, CHANG Sen¹, LI Xin¹

1. China Institute for Radiation Protection, Taiyuan 030006;
2. CGN Huizhou Nuclear Power Co. Ltd., Guangdong Huizhou 516003;
3. Yangjiang Nuclear Power Co. Ltd., Guangdong Yangjiang 529941

Received:2023-05-04 Online:2023-11-20 Published:2023-12-25

摘要/Abstract

摘要： 核电厂发生冷却剂损失事故导致堆芯熔化时,核燃料中的放射性碘会随冷却剂释放到安全壳内形成含碘高温高压蒸汽环境。在自然作用与人工干预(喷淋等)下,碘物理与化学形态逐渐发生变化,在长期阶段形成有机碘占主导地位的气态碘环境。本文简述了核电厂事故工况有机碘的形成及滤除排放工艺并开展了有机碘蒸汽环境模拟研究。通过定量汽化与多重控制实现了典型事故工况参数(130 ℃、399 kPa、95%rh)为代表的有机碘蒸汽环境宽范围精确模拟。含碘蒸汽环境模拟可用于在役吸附剂有机碘滤除性能检测与新型吸附剂开发,在事故工况下对有机碘的滤除与可控排放方面具有一定的作用。

关键词: 事故工况, 有机碘滤除, 环境模拟, 高温蒸汽, 湿度监测

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

中图分类号:

TL732

高琳锋, 梁俊钦, 姚岩岩, 赵高昕, 陈欣, 常森, 李昕. 熔堆事故下有机碘形成、滤除排放与蒸汽环境模拟[J]. 辐射防护, 2023, 43(6): 576-585.

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.

参考文献

[1] Gulhane N P, Landge A D, Shukla D S, et al. Experimental study of iodine removal efficiency in self-priming venturi scrubber[J]. Annals of Nuclear Energy, 2015, 78:152-159.
[2] Bal M, Jose R C, Meikap B C. Control of accidental discharge of radioactive materials by filtered containment venting system: A review[J]. Nuclear Engineering and Technology, 2019, 51(4): 931-942.
[3] Bosland L, Dickinson S, Glowa G A, et al. Iodine-paint interactions during nuclear reactor severe accidents[J]. Annals of Nuclear Energy, 2014, 74: 184-199.
[4] The American Society of Mechanical Engineers. Code on nuclear air and gas treatment:ASME AG-1—2019[S].New York: ASTM International, 2019.
[5] Yang J, Lee D Y, Miwa S, et al. Overview of filtered containment venting system in nuclear power plants in Asia[J]. Annals of Nuclear Energy, 2018, 119: 87-97.
[6] Simondi-Teisseire B, Girault N, Payot F, et al. Iodine behaviour in the containment in Phébus FP tests[J]. Annals of Nuclear Energy, 2013, 61: 157-169.
[7] Clément B, Zeyen R. The objectives of the Phébus FP experimental programme and main findings[J]. Annals of Nuclear Energy, 2013, 61: 4-10.
[8] Girault N, Dickinson S, Funke F, et al. Iodine behaviour under LWR accident conditions: Lessons learnt from analyses of the first two Phebus FP tests[J]. Nuclear Engineering and Design, 2006, 236(12): 1293-1308.
[9] Clément B, Hanniet-Girault N, Repetto G, et al. LWR severe accident simulation: synthesis of the results and interpretation of the first Phebus FP experiment FPT0[J]. Nuclear Engineering and Design, 2003, 226(1): 5-82.
[10] Dickinson S, Sims H E, Belval-Haltier E, et al. Organic iodine chemistry[J]. Nuclear Engineering and Design, 2001, 209(1-3): 193-200.
[11] Bosland L, Colombani J. Review of the potential sources of organic iodides in a NPP containment during a severe accident and remaining uncertainties[J]. Annals of Nuclear Energy, 2020, 140: 107127.
[12] Glowa G A, Moore C J, Ball J M. The main outcomes of the OECD behaviour of Iodine(BIP) project[J]. Annals of Nuclear Energy, 2013, 61: 179-189.
[13] Noguchi H, Murata M. Physicochemical speciation of airborne ¹³¹I in Japan from Chernobyl[J]. Journal of Environmental Radioactivity, 1988, 7(1): 65-74.
[14] Thangamani I, Gera B, Dutta A, et al. Preliminary evaluation of effect of Engineered Safety Features on source term for AHWR containment[J]. Kerntechnik, 2011, 76(5): 324-336.
[15] Dong S, Yang J. Overview of the experimental studies and numerical simulations on the filtered containment venting systems with wet scrubbers[J]. Annals of Nuclear Energy, 2019, 132: 461-485.
[16] Vien T T, Narabayashi T, Takahashi T, et al. Effects of the baffle plate of the advanced venturi scrubber on decontamination factor of the filtered containment venting system[J].Japanese Journal of Multiphase Flow, 2021, 35(2): 337-345.
[17] Kawamura S, Kimura T, Watanabe F, et al. Development of an organic iodine filter for filtered containment venting systems of nuclear power plants[J]. Trans At Energy Soc, 2016, 15(4): 192-209.
[18] Kawamura S, Kimura T, Ohmori S, et al. Development of an organic iodine filter design and performance improvement of filtered containment venting system[C]//The Proceedings of the National Symposium on Power and Energy Systems, Japanese, 2016: B121.
[19] Bosma R, Pouw R J, van Schaik W, et al. Climatic chamber for dew-point temperatures up to 150 ℃[J]. Metrologia, 2018, 55(4): 597-608.
[20] Peruzzi A, Bosma R, Tabandeh S, et al. A comparison of relative humidity calibration facilities at temperatures up to 170 ℃[J]. Measurement, 2022, 189: 110435.
[21] Georgin E, Bernard N, Salem M. New calibration facility developped at LNE-CETIAT[C]//19th International Congress of Metrology. Paris, France, 2019: 18004.
[22] Tabandeh S. Advances in Humidity Standards[D]. Torino: Politecnico di Torino, 2019.
[23] Chebbi M, Azambre B, Monsanglant-Louvet C, et al. Effects of water vapour and temperature on the retention of radiotoxic CH3I by silver faujasite zeolites[J]. Journal of Hazardous Materials, 2021, 409(30): 124947.
[24] Kurata M, Osaka M, Jacquemain D, et al. Advances in fuel chemistry during a severe accident: update after Fukushima daiichi nuclear power station(FDNPS) accident[J]. Advances in Nuclear Fuel Chemistry, 2020: 555-625.
[25] 赵金涛,姚迪,王静. 核电厂安全壳设计时各种温度作用分析方法的探讨[J].建筑结构,2017(S2):170-172.
ZHAO Jintao, YAO Di, WANG Jing. Discussion on analysis methods of various thermal actions in the design of nuclear power plant containment[J].Building Structure,2017(S2):170-172.
[26] Guilbert S, Bosland L, Fillet S, et al. Formation of organic iodide in the containment in case of a severe accident[J]. Transactions of the American Nuclear Society, 2008, 98: 291-292.
[27] Birchley J, Haste T, Bruchertseifer H, et al. Phébus-FP: results and significance for plant safety in Switzerland[J]. Nuclear Engineering and Design, 2005, 235(15): 1607-1633.
[28] Wagner W, Pruss A. The IAPWS formulation 1995 for the thermodynamic properties of ordinary water substance for general and scientific use(Review)[J]. Journal of Physical and Chemical Reference Data, 2002, 31(2): 387-535.