TRANSIENT THERMAL-HYDRAULIC SIMULATION OF THE SMALL MODULAR ADVANCED HIGH-TEMPERATURE REACTOR (SmAHTR)

摘要

The Small Modular Advanced High-Temperature Reactor (SmAHTR) is a novel small reactor concept using liquid salt coolant and coated-particle fuel in a graphite matrix. The reactor has a thermal power of 125 MWth. This reactor is a "small version" of the Advanced High Temperature Reactor (AHTR). The AHTR concept cooled by a liquid salt was developed and studied at ORNL previously (Ref. 1). The excellent heat transfer characteristics of liquid salts are advantageous over gas coolants, enabling larger power densities and passive safety features. The SmAHTR combines three existing technologies: (1) high-temperature, low-pressure liquid salt coolant, (2) high-temperature coated-particle fuel, (3) and passive decay heat cooling systems by using Direct Reactor Auxiliary Cooling Systems (DRACS).