Design Of Supplemental Transfer Line For Certain PWR Fuel Rod

With the rapid development of nuclear power,technology and equipments are continuously improved and perfected in nuclear fuel manufacturing field.Automatic and intelligent technology is more and more widely used in each process to replace heavy and repetitive manual operation.The PWR in this paper is one of the most advanced reactors of Generation III in nuclear technology field and the fuel rod manufacturing process is the first and most important step to ensure the integrity of fuel assembly in the reactor.To ensure the process stability and product controlled,it is very necessary to reduce the chance of manual intervention.This paper takes fuel rod transmission line for this PWR fuel in X plant as the study object to design the cladding tube transmission method between the tube oxidation station and pellet vibration loading station,and the fuel rod transmission method between active Gamma scanning station and visual inspection station.After considering the layout of current equipment,final plan is determined and transmission line of these two parts is developed.The main contents of this paper are as follows:(1)Carried out the research to X plant fuel rod manufacturing and inspection process.Summarized the characters and general design requirements of fuel rod transmission line according to process.Proposed the detail design idea and the final target according to current manual cladding tube transmission method between the tube oxidation station and pellet vibration loading station,and the fuel rod transmission method between active Gamma scanning station and visual inspection station.(2)Performed mechanical structure design of each section to realize the functions such as cladding tubes and and fuel rods grading storage,automatic single rod sort and transmission,alignment correction,lot transmission by synchronization belt,raise of tube lot,gantry transmission of tube lot and established the transmission line frame.(3)Performed electrical control system and PLC program design.With OMRON motion controller used as the control center for logic and motion control,serve motor,frequency variable motor,cylinders as different execution sections,the whole automatic motion is achieved according to program written with LAD(LadderLogic Programming Language).Through HMI(human machine interface),which is developed by software NB-Designer and communicate with OMRON motion controller,equipment control and sensor status indication can be realized,which reinforce the interactivity between human and machine.