Thermal calculation of hermetic lead-ins for atomic power plants with a Ferro-concrete shell

摘要

General formulae for calculating allowable lood current of lead-ins of power and control cables with account taken of the capacity factors are obtained. Formulae for calculating thermic resistances of elements of lead-in constructions are given. An order for calculating a temperature field in an atomic plant protection wall around, a hermetic lead-in is presented. On its basis a formula for calculating termic resistance under heat transfer from an assembling pipe through a ferro-concrete protection wall is proposed. The results of numerical calculations of allowable load current for basic types of hermetic lead-ins are given.