The reporter learned from the General Engineering Research Institute of the Chinese Academy of Engineering Physics on the 27th that following the independent research and development of the high-temperature radiation-resistant acceleration sensor for nuclear power plants, its newly developed radiation-resistant acoustic emission sensor also passed the acceptance test. The equipment and China Nuclear Power Research The leakage monitoring system of the design institute has been provided, and the “Hualong No. 1†Fuqing No. 5 and No. 6 units have been put into use. The delivery of this series of products marked China's success in breaking the foreign technical blockade and monopoly, and possessed a localized "auscultation pulse" equipment for nuclear power safety monitoring.
Nuclear power plant sensors are one of the core key components of the nuclear power online monitoring system. Researcher Qiu Yong, director of the General Institute of the Chinese Academy of Sciences, said that the harsh environment of nuclear power plant sensors requires long-term reliable work in high-temperature and high-irradiation environments. The sensors and their preparation processes on the market cannot be satisfied at all.
He said that to make the entire sensor resistant to radiation, every material that makes up the sensor must be resistant to radiation, and it must be able to maintain its performance after 108rad irradiation (equivalent to the radiation dose of the nuclear power unit for 60 years). The material selection should be elaborate, and the test verification should not be less, from the sensitive material of the sensor and the body material to the metal and non-metallic materials used in the connectors and high-temperature cables. At the same time, the high temperature is also fatal to the sensor. Ordinary sensors have no signal at a few hundred degrees Celsius and are damaged by "heat", while nuclear power sensors need to be "stalled" stably at high temperatures in order to "auscultate" Every failure.
The research team of the institute completed the independent research and development of high-temperature radiation-resistant acceleration sensors and radiation-resistant acoustic emission sensors for nuclear power in 4 years. In August 2015, the high-temperature radiation-resistant acceleration sensor developed by the Institute for the Pakistani Chashma Nuclear Power Plant passed the acceptance; last October, the radiation-resistant acoustic emission sensor developed by the Institute for the Karachi Nuclear Power Plant in Pakistan passed the acceptance; the radiation resistance in July this year The acoustic emission sensor passed the acceptance test and was used for the leakage monitoring system of Unit 5 and Unit 6 of Fuqing, Fujian, the first domestic demonstration project of "Hualong No. 1". (Reporter Tang Liqing Xiaoxia Sheng Li)
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