# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (9): 131

• NUCLEAR ENERGY SCIENCE AND ENGINEERING •

### Improvements to hydrogen depleting and monitoring system for Chinese Pressurized Reactor 1000

Zhang Yang 1,2  Yu Wang 3  Nian-Yong Zhou 1  Yan-Long Jiang 1

1. 1 Department of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2 Fujian Ningde Nuclear Power Company, Ningde 355200, China
3 College of Urban Construction, Nanjing Tech University, Nanjing 211800, China
• Contact: Yu Wang E-mail:13913808658@163.com; yu-wang@njtech.edu.cn
• Supported by:

This work was supported by the Priority Academic Program Development of Jiangsu Higher Education Institution.

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Zhang Yang, Yu Wang, Nian-Yong Zhou, Yan-Long Jiang. Improvements to hydrogen depleting and monitoring system for Chinese Pressurized Reactor 1000.Nuclear Science and Techniques, 2017, 28(9): 131
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Abstract:

We evaluate the hydrogen depletion ability of the hydrogen depletion system for Chinese Pressurized Reactor 1000 (CPR1000), which has been applied in nuclear power plants with pressurized water reactors; moreover, we introduce a new device that can continuously monitor hydrogen concentration inside the CPR1000 containment building. Experimental studies show that a moveable hydrogen autocatalytic recombiner alone can sufficiently deplete hydrogen under the condition of a design-basis accident, and 33 passive autocatalytic recombiners placed in the areas of high hydrogen concentration satisfy the hydrogen depletion requirements under the condition of a beyond-design-basis accident. Meanwhile, the hydrogen concentration monitoring system is designed and installed based on the approach of detecting the temperature increase caused by the catalytic reaction of hydrogen. In conclusion, the hydrogen depletion capacity of the CPR1000 meets the requirements, and the system’s safety can be enhanced by the improved hydrogen concentration monitoring system.