Design of the exhaust system in the confinement of the HTR-10

The modular high temperature gas-cooled reactor has a vented confinement instead of a gastight pressurized containment due to its passive safety features. The safety class negative pressure exhaust system is used in the heating, ventilation and air conditioning system to fulfill all kinds of safety-related functions at the normal operation and during accidents. This paper introduces and reviews the design of safety class negative pressure exhaust systems of the 10 MW high temperature gas-cooled reactor-test module.