| Independent design of nuclear software has always been the core bottleneck hindering the development of nuclear technology in China.COSINE,autonomy of the integration software of core design and system safety analysis,is operated to break through the restrictions and become a technical support of nuclear technology upgrade.The operation processes of nuclear software have to go through different steps as below,Requirements Analysis—Programming—Coding—Verification and Validation—Assessment,of which ‘Verification’ plays as a very important role.It needs to combine numerical methods with closed equations to design verification matrix and testing cases.The aim of verification is to prove that the coding is definitely right according to the final numerical results.The thesis,based on the operation of COSINE,completed full verification for thermal-hydraulic program of COSINE on its correctness of calculation of one-dimensional transportation of two fluids,associated with steady/transient,low/high velocity,compressible/incompressible,phase changed/unchanged,normal/special phase conditions,through a series process of case design,modeling,numerical simulation,qualitative and quantitative analysis for the following cases,monopropellant rocket,nozzle flow,boiling in pipe,one-dimensional sedimentation and shock tube.Besides,calculating module for droplets in transportation of two fluids,associated with phase change,was developed to expand the scope of its application. |
