国内某核电厂局部辐射热点屏蔽装置设计及安装评价

doi:10.27046/j.1004-6356.202603002

Abstract

Abstract: To overcome the problems of heavy weight, long installation time and high exposure dose during installation associated with conventional temporary shielding devices, three types of temporary shielding devices were designed based on the principle of optimization of radiation protection, targeting γ-radioactive pipeline hotspots of various configurations at a nuclear power plant. These include a modular flexible shield with a polymer matrix, a customized shielding device, and a screen-type shielding device.In this study, the Monte Carlo method was employed to simulate and achieve the optimal design of shielding thickness for each device.The results show that the three shielding devices all exhibit favorable shielding performance under different application scenarios. Field measurements further validate the reliability and safety of the shielding devices.This study can provide experience for the shielding of similar pipeline hotspots and a reference for the optimal design of temporary shielding devices.To address the drawbacks of excessive weight, lengthy installation periods and high occupational exposure doses during installation inherent to traditional temporary shielding structures, three novel temporary shielding devices are developed following radiation protection optimization principles. The devices are tailored for gamma-ray pipeline hot spots of diverse layouts in nuclear power plants, namely a polymer-matrix modular flexible shield, a special-shaped customized shielding unit and a screen-type shielding apparatus. In this work, Monte Carlo simulations are utilized to optimize the shielding thickness of each structure. The simulation results demonstrate that all three devices achieve excellent shielding effectiveness across various working conditions. On-site measurement data further verify the reliability and safety of the proposed shielding schemes. This research offers practical engineering experience for the treatment of analogous pipeline radiation hot spots and provides a reference for the optimized design of temporary radiation shielding equipment.

Key words: nuclear power plant, temporary shielding, Monte Carlo simulation, radiation protection

CLC Number:

TL77

LI Linkang, ZHOU Xun, ZHAO Xihuan, LI Zhonghua, YI Baiyuan, HAN Xueyan. Design and installation evaluation of shielding devices for localized radiation hot spots in a nuclear power plant[J].RADIATION PROTECTION BULLETIN, 2026, 46(3): 7-13.

References

[1] 王川,韦应靖,倪伟,等.秦山第二核电厂阀门类设备弱贯穿辐射调查[J]. 辐射防护,2018, 38(6): 457-465.
[2] 王川,邬强.浅析核电站辐射防护的主要任务[J]. 辐射防护,2008,(2): 125-128.
[3] 王超,黄昊,姜建其,等.M310系列压水堆核电厂硼酸过滤器辐射热点成因研究及对策[J]. 核科学与工程,2023,43(1): 191-199.
[4] 韩毅,张龙龙,陈法国,等.远距离输运填充式屏蔽装置设计[J]. 核电子学与探测技术,2020,40(4): 676-680.
[5] 韩毅,于伟跃,陈法国,等.核电站辐射热点临时屏蔽装置研制现状[J]. 核电子学与探测技术,2016,36(12): 1263-1267+1277.
[6] 谢文明,韩毅,杨明明,等.辽宁红沿河核电厂临时屏蔽装置屏蔽效果评估[J]. 核电子学与探测技术,2020,40(6): 1000-1005.
[7] Dejangah M, Ghojavand M, Poursalehi R, et al. X-ray attenuation and mechanical properties of tungsten-silicone rubber nanocomposites[J]. Materials Research Express, 2019, 6(8): 085045.
[8] Doty R, Mizumachi W. Work management to optimize occupational radiological protection at nuclear power plant, ISOE, France, 2009.
[9] 吴志锋,韩毅,杨明明,等.柔性钨橡胶对手套箱管线辐射热点的屏蔽效果研究[J]. 材料导报,2020,34(S2): 1572-1575.
[10] Kijima K, Krisanachinda A, Pasawang P, et al. Shielding efficiency of novel tungsten rubber against radionuclides of ^99mTc, ¹³¹I, ¹⁸F and ⁶⁸Ga[J]. Radiation Physics and Chemistry, 2020,172:108755.
[11] Xu X R, Wu J Q, Xu J, et al. Preparation of flexible rubber composites with high contents of tungsten powders for gamma radiation shielding[J]. Rare Metals, 2022, 41(7): 2243-2248.
[12] 倪伟,韩毅,沈华亚,等.核电厂临时屏蔽装置防护效果分析与评价[J]. 核电子学与探测技术,2018,38(6): 769-773.

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Design and installation evaluation of shielding devices for localized radiation hot spots in a nuclear power plant

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