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福岛事故中氢气爆炸对全球核电厂安全提出了严峻挑战。因此,加强对安全壳内氢气浓度的监测变得非常重要。为了提高中国在役和在建核电厂的核安全水平,中国国家核安全局颁布了《福岛核事故后核电厂改进行动通用技术要求》。本文以通用技术要求为依据,具体分析了严重事故后氢气监测系统的功能和设备要求、存储和布置要求,同时对两种安全壳氢气浓度测量技术,即直接测量技术和抽出式测量技术进行了论述和比较。本文特别提出,中船重工第七一八研究所采用直接测量技术,成功研制出适用于严重事故下使用的CH-15型安全壳内氢气浓度测量装置。氢气传感器具有自主知识产权,采用催化原理,安装在安全壳内。装置特点是测量范围宽、测量精度高,可实现多点连续测量。该装置组成简单、体积小、能耗低,适用于国内外已运行和在建核电厂进行技术改进及加装。
The hydrogen explosion in the Fukushima accident posed a serious challenge to the safety of nuclear power plants around the world. Therefore, it is very important to strengthen the monitoring of hydrogen concentration in containment. In order to improve the level of nuclear safety of China’s nuclear power plants under construction and in construction, China’s National Nuclear Safety Administration promulgated the “General Technical Requirements for Improving Nuclear Power Plants after the Fukushima Nuclear Accident.” Based on the general technical requirements, this paper analyzes the function, equipment requirements, storage and layout requirements of the hydrogen monitoring system after serious accidents. At the same time, the two kinds of containment hydrogen concentration measurement techniques, direct measurement technology and pullout measurement technology Discussion and comparison. In particular, the paper proposes that the direct measurement technology used by China Shipbuilding Heavy Industry Research Institute, Seventh Research Institute, successfully developed a hydrogen concentration measuring device for CH-15 type containment used in serious accidents. Hydrogen gas sensor with independent intellectual property rights, the catalytic principle, installed in the containment. Device is characterized by wide measuring range, high accuracy, multi-point continuous measurement. The device is simple in composition, small in size and low in energy consumption, and is suitable for technical improvement and retrofitting of nuclear power plants under operation at home and abroad and under construction.