Preliminary design and analysis on the cogeneration system for Small Modular Lead-cooled Fast Reactor

Abstract

Small Modular Lead-cooled Fast Reactor (SMLFR) is characterized by high safety, high efficiency, adaptability and versatility. The integrated system design adapts to more site conditions. Cogeneration is an advanced form of energy utilization based on the principle of energy cascade utilization, in which energy is mainly used to produce electricity and waste heat is used for heating at the same time. In this paper, the preliminary design of cogeneration system for SMLFR with the extraction-condensing and back-pressure cogeneration (EBC) type is proposed based on mathematical modeling and thermodynamically analysis. Based on a 35 MWth SMLFR, the effects of the main parameters and mass flow rate of heating steam on the power generation and efficiency are analyzed. A certain urban area in northern China with about 800,000 m2 heating area is chosen to analyze the heating capacity, power generation capacity and economy under different cogeneration types by thermodynamic calculation. The work aims to point out the optimization direction of system integration for the Lead-cooled Fast Reactor (LFR) cogeneration system by the thermodynamic analysis. This cogeneration system can provide a reference for the secondary loop design of Generation-IV (GEN-IV) reactors.