Development of a Model for Long-Term Storage Container for VVER-1000 Spent Fuel Assemblies in ANSYS CFX

Abstract

This paper evaluates the thermohydraulic aspects of modeling multi-purpose container (MPC-31) with VVER-1000 spent nuclear fuel (SNF) during its long-term storage in HI-STORM container (designed by Holtec International). The paper describes the main approaches and assumptions applied for the development of correspondent ANSYS CFX model, as well as provides the main calculation results for one of the cases of MPC-31 loading with SNF. The results of calculations were used in the regulatory review of technical specifications of MPC-31 and correspondent safety analysis reports.