Pipe Grade For PDMS-based Design In Nuclear Fuel Cycle Back-end Projects

The nuclear fuel cycle back-end project is a knowledge-intensive and information-intensive field.It mainly uses chemical means to extract useful components from spent fuel in nuclear power plants and minimizes waste disposal.It not only includes various technological operations and complex processes of chemical plants,but also has the characteristics of high radioactivity and critical risks of nuclear facilities.The back-end project of the nuclear fuel cycle requires thick concrete to be shielded.The high level of sealing requirements leads to high construction costs.Therefore,the space required is as small as possible,which greatly increases the difficulty of equipment layout and pipeline layout.The design method of the nuclear fuel cycle back-end project is transitioning to the three-dimensional design.Through comparative research on the results of the general chemical industry through research and drawing on the three-dimensional design experience of nuclear power,the integrated design platform for the back-end project of the nuclear fuel cycle based on PDMS(Plant Design Management System)was determined.The process of creating the design model in the PDMS integrated design system is actually designing the data filling and reference process of the database.The relevant data(design database)in the design process are driven by the grade,from the corresponding database(including equipment,pipelines,steel structures,civil works).,cable trays,HVAC(Heating,Ventilating and Air Conditioning)pipes,multi-professional hangers,etc.)are selected and selected to be suitable for the components used in this project,so as to ensure the consistency and consistency of the engineering design and improve the design quality.Therefore,the pipeline grade is one of the cores of three-dimensional design.To achieve zero breakthrough in the three-dimensional design of the nuclear fuel cycle back-end project,pipeline grade research and construction must be carried out.This dissertation studies the pipeline naming rules,analyzes the situation of the back-end project of the nuclear fuel cycle,determines the pipeline naming rules of the nuclear fuel cycle back-end project,and establishes the main pipeline grade list of the nuclear fuel cycle back-end project according to the naming rules.On the basis of the established pipeline grades,the pipeline rating list study was conducted,the actual characteristics of the joint project were combined,and the contents of the pipeline rating list were determined.The nuclear power cycle was determined by integrating the existing nuclear power three-dimensional design experience of China Nuclear Power Engineering Co.,Ltd.The back-end project adopted a petrochemical standards system and determined the specific standards for the implementation of pipelines,pipe fittings,flanges,etc.,specified the design pressure and temperature of the pipelines,fittings and flanges of the nuclear fuel cycle back-end project,and clarified the pipelines,pipe fittings and methods.The specific selection principle of Lan,the determination of the style of pipeline branches,the determination of the main pipeline grade library of the nuclear fuel cycle back-end project,and the final description of how to import and use the pipeline grade library in PDMS to verify the feasibility of the pipeline grade being studied.The pipeline grades studied in this paper not only reflect the general requirements of the industry(pipeline materials),but also reflect the specificity of the nuclear fuel cycle back-end project(pipe wall thickness,manufacturing specification level / safety classification)to meet the basic needs of engineering design,in order to promote three-dimensional The design laid a solid foundation for the implementation of the nuclear fuel cycle back-end project.