As the digital transformation of the global economy has become an irreversible trend, the digital economy has become a new hot spot in the global economy, and countries have launched corresponding strategies to seize the opportunity. General Secretary Xi Jinping stressed that digital transformation is a new driving force for the development of the world economy. China is actively embracing and leading this wave of change.

Digital twin technology enables a virtual mapping of the entire life cycle of a physical product by integrating physical models, sensor data, and historical operating data. This technology not only promotes the digitalization, networking and intelligence of the industry, but also becomes an important driving force for China's economic and social development.

In the field of predictive maintenance, digital twin technology has shown its unique value. For example, the Reactor Operational Twin (RODT) technology relies on the software model and real-time data acquisition of the physical entity to provide real-time monitoring and intelligent support for the operation of the reactor. Through improved parameter identification and state estimation, digital twin technology is able to optimize reactor monitoring, control, and performance, revolutionizing nuclear engineering practice.

Based on the domestic nuclear reactor design software CORCA-SIM, the research team proposed the architecture of RODT, and studied a variety of machine learning algorithms and other heuristic algorithms to improve the accuracy and efficiency of RODT-related forward and negative problem calculations. Through rigorous computational performance evaluation, the KNNLHS algorithm stands out for its accuracy and efficiency in real-time online computing, with a prediction error of only 1% and a processing time of less than 0.1 seconds. Algorithms such as FSA, DE and ADE have a longer processing time but higher accuracy, reaching a relative binorm error of 0.3%.

The following diagram illustrates the software interface and visual interface of RODT:

Against the backdrop of the State Council's recent approval of the construction of several nuclear power plants, RODT (Reactor Operation Twin) technology plays a crucial role in supporting the operation of these new nuclear power plants.

RODT technology provides a highly accurate virtual replica of a nuclear power plant by integrating physical models, sensor data, and operational history, and through real-time monitoring and intelligent analysis, potential problems at the nuclear power plant are identified in advance for predictive maintenance, thereby reducing downtime and improving the operational efficiency of the nuclear power plant. In addition, RODT technology is able to support remote operation and automated control of nuclear power plants, which is especially important for new nuclear power plants, which are often located in remote areas and may have relatively limited personnel and resources. RODT technology is expected to be further integrated into advanced nuclear power solutions under development to provide data-driven decision support for the full lifecycle management of nuclear power plants. This will not only promote the digital transformation of China's nuclear energy industry, but also provide solid technical support for the realization of the national "dual carbon" goal and the optimization of the energy structure.