Analysis And Evaluation For Typical Equipment On The Pressure Boundary Of Containment

The equipments on containment pressure boundary are including personnel airlock,equipment hatch and mechanical and electrical penetrations. These equipments are important components of the containment pressure boundary. Compared to other equipments, the personnel airlock has larger dimension and more complex structure. It can be used as typical equipment on the pressure boundary of the containment to carry on the key analysis.In this paper,the personnel airlock is used as the research object. UG NX is used to model and aE2mble the parts, such as the inner cylinder, outer cylinder, locking bracket and so on. The 3D model is introduced into the ANSYS finite element model, and the finite element method based on ANSYS is adopted to analyze and evaluate the structure of personnel airlock.In this paper, the author analyzes the pressure retaining structure and important parts for personnel airlock by using the finite element analysis theory, and evaluates them by the elastic stress analysis method and ultimate load analysis method. The main content of the paper is to determine the effect and effect combination, analyze the static strength and dynamic characteristics of the equipment, and evaluate its pressure retaining capacity based on the analysis results, including: 1. The calculation of the forced displacement of the containment and the seal compression reaction force, and applying the load to the model, and carried out analysis on the model. 2. The determination of severe accident sequence, treating the serious accident as the design expansion condition to analyze and propose the evaluation criterion of severe accident. 3. Performing a separate analysis for the components of the containment locking function and in view of the possible internal overpressure accident, the evaluation criterion is given. 4. The calculation and analysis of a frequency personnel airlock and combined with the quasi-static method to determine earthquake load. 5. Applying limit load analysis method for personnel airlock to calculate the pressure retaining capability and giving the structure can bear the maximum value of the load.