Design for High Level Layout and Control of Nuclear Island HVAC Based on DCS Technique

Abstract

At present, most of Chinese Nuclear Power Plants (NPPs) in operation and under construction adopt Digital Control System (DCS). As a result, the special High Level Layout and Control Function based on DCS platform are required to fulfill the normal and accident operation tasks. As the supporting systems of safety and safety-related systems, the Heating, Ventilation, and Air Conditioning (HVAC) systems are responsible for shielding the radioactive productions and maintaining the environment temperature in the acceptable scope for the staffs and the important equipments. Considering that the HVAC systems have been involved frequently during normal and accident operating, the special High Level Layout and Control Functions (HLLCF) for HVAC should be designed to present the advantages of DCS platform, but also assist the operators to implement the operating procedures quickly and improve the safety of NPPs.