Discussion on the Verification and Validation Technology of Nuclear Safety Level Software Based on Bayesian Belief Network

Software Verification and Validation (V&V) refers to verifying and confirming that software meets its expected specifications and requirements through various testing and analysis techniques，which can ensure the high quality and reliability of the software system, while also reducing the development cost and time. This paper mainly studies the verification and verification technology of nuclear safety software，based on the characteristics that traditional software verification and validation can only be used to evaluate the product qualitatively, this paper proposes the method of combining qualitative analysis and quantitative analysis, that is, using the Bayesian method to provide a basic model, through the determination of expert weight and analytic hierarchy process, the transformation mode from qualitative analysis to quantitative analysis is clarified. The mathematical model is established by quantitative analysis, and the evaluation target is assigned to each node in the model, and the valuation is adjusted according to the target, so as to solve the problems that cannot be objectively quantified in the existing review activities in the industry.