Transient analyses of the passive residual heat removal system

The steam generator secondary residual heat removal system is a new design with three-fold natural circulation loop. It is the candidate of the safegu ard systems of next generation pressurized water reactor design in China. T his paper presents the development of a program, which would be used in the system design. One-dimensional drift flux mixture flow model is used for a nalysis of the steam water loop. whereas single-phase fluid model is applie d to single flow in primary system and air loop. Based on the mathematical model. the code SGSPRHR has been developed. The transient analyses, when st ation black out accident happens. have been made. Sensitivity study results have also been given. The calculated parameter variation trends are reason able. (C) 2001 Published by Elsevier Science B.V. All rights reserved.