China's zero-power device research and development breakthrough


Xinhua News Agency, Beijing Electric (Reporter Gao Jing) reporter learned from China National Nuclear Corporation that the nuclear power reactor zero-power device "Qi Xing II" jointly developed by China Nuclear Research Institute of China Nuclear Science and Technology and the Institute of Modern Physics of Chinese Academy of Sciences for the first time on the 23rd realized for the first time on the 23rd. critical. This marks another major node in the completion of China's accelerator-driven subcritical system (ADS) research, and also marks that China has reached the international advanced level in the research and development of nuclear reactor new generation zero-power devices.

One of the main problems facing the development of nuclear power at present is nuclear waste disposal. According to reports, the accelerator driven subcritical system - ADS enthalpy system, can make long-life high-level nuclear waste into short-lived low-level nuclear waste, while reducing the volume, is of great significance for solving the problem of safe disposal of nuclear waste.

ADS is a concept proposed in the 1990s and is recognized as the most promising nuclear waste transmutation device. China's long-term continuous ADS research is a strategic measure for the advance layout of nuclear waste treatment and disposal. At present, there is no precedent for the engineering application of ADS transmutation system in the world. "Qi Xing II" will provide key experimental data for the engineering research of ADS transmutation system.

The "Qi Xing II" device innovatively adopts the "double core" structure of water reactor and lead stack, and selects flexible switching through the control system to achieve the separate start of the double core to achieve the dual functions of benchmarking and engineering verification. Ensure the reliability and accuracy of monitoring technology and measurement data. The lead-based core is China's first lead-based zero-power device, in which the sub-physical properties are closest to the ADS engineering application system.

According to the relevant personnel of the China Atomic Energy Research Institute, the "Qingxing II" device has the characteristics of inherent safety, flexible variability of the core, visibility of operation control, and measurement accuracy. At the same time, the radiation dose of this device is low, ensuring that the radiation received by workers is close to the background level.

After the device is built, it can be used to carry out a series of experiments. It is the benchmarking platform for the design process and database of the ADS system in the future, the measurement technology test and verification platform and the research and education platform for researchers.

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