Research Of Verification And Validation For FPGA-based Safety Instrumentation And Control System Of Nuclear Power Plants

With the rapid development of the national economy and the adjustment of the energy structure, nuclear energy will undoubtedly have a brighter future. But at the same time, the self-reliance of nuclear power technology and equipment will undoubtedly become the focus of both opportunities and challenges. Among them, the digital control system, especially the safety I&C (Instrument and Control) system, is one of the few of the fortress in our country.At present, the most widely used I&C system in nuclear power plant is based on CPU(Processing Unit Central) technology. Compared with CPU technology, FPGA (Field Programmable Gate Array) technology is more like the traditional hard wired circuit. Because of its advantages such as behavior determination, simple structure, fast response, easy to obtain supervision and license, it is widely used in nuclear power plant safety I&C system,especially the development of a new generation of nuclear power plant safety I&C products,such as the United States, France, Canada, Japan, Eastern Europe, South Korea and other nuclear power developed countries, some FPGA products have made a number of applications in nuclear power plants.During the development of safety I&C system for nuclear power plant, no matter what technology is aimed at, it is necessary to carry out V&V (Validation and Verification)activities. V&V concept first appeared in the software development design, currently still lack of a unified V&V system and method for FPGA-based I&C technology. Therefore, this paper is to establishment of the V&V system and methods, and through practice to prove the effectiveness of the results of the study.Firstly, to study and establish the V&V system, must master the regulations or standards required by the V&V work. The reason for ability of V&V practitioners to equal or higher than the R&D and Application Engineer, because V&V tasks not only to carry out their work in accordance with the standards for the professional V&V (such as IEEE1012), and to be very familiar with all kinds of product development and engineering applications standards(such as review work should correspond to each specific terms in a standard requirements), to master the test method and test implementation. Therefore, tracking, combing, research,analysis and understand both the FPGA-based I&C system and its V&V activities should be followed by the applicable standards is undoubtedly the most basic work.Secondly, although the subject in this paper is based on FPGA technology, but the traditional concept and system, specific test means or method during implementation of V&V activities is also mature or commonly used, just need to choosing and constitutes a complete and effective implementation procedures combined with the characteristics of FPGA technology.In this paper, the main tasks, work flow or test methods of the V&V are taking into account the combination of the traditional concept and the characteristics of FPGA technology.Finally, to some extent, the V&V material such as standard requirements, concept and system,test means or methods are all readily available, but result and efficiency should be reflected through the final practical work. The case in this paper has been completed product prototype development and ongoing safety certification work, which important V&V work system and execution program has passed the international authoritative organization certification.Despite the described contents has not been refined to direct reference, but has established a clear framework of the implementation.