A SOFTWARE PACKAGE FOR SEL ECTION AND RATIONALE OF INTEGRAL-TYPE NUCLEAR REACTOR PARAMETERS

摘要

Small and medium integral-type reactors of the NPP considered as subjects of simulation have the following main features: presence of built-in once-through steam generator; presence of built-in steam-gas pressunzer; application of fuel elements of different geometrical shape, etc. The ROSA/RADIUS software package is intended for analysis of transients and the accidents at the stage of selection and rationale of integral-type reactors parameters when a large number of transients should be taken into account. The purpose of the software package development and application is to reduce computer resources involved and user’s labour input during a transients analysis. The ROSA/RADIUS software package takes into consideration the specific features of integral-type reactors designed in RDIPE in the approximation of the main system of equations, in the choice of closing empirical relationships, in special models of equipment. It allows to improve the software efficiency With the aid of ROSA/RADIUS, a dynamic model has been developed for analysis of integral-type reactors designed in RDIPE. Calculations performed with the model showed good agreement with the experimental data obtained from existing reactors.