SAFETY-LEVEL FUNCTIONAL CONTROL SYSTEM AND METHOD FOR STEAM ATMOSPHERIC EMISSIONS SYSTEM OF NUCLEAR POWER PLANT

摘要

A safety-level functional control system and method for a steam atmospheric emissions system of a nuclear power plant. The safety-level functional control system comprises: three independent control columns, wherein each MSRIV is connected to a first control sub-column in the three independent control columns, each MSRCV is connected to a second control sub-column in one independent control column, and different MSRCVs are connected to different second control sub-columns. While meeting the triple redundant configuration of the steam atmospheric emissions system, the safety-level functional control system also meets the design principles of the three independent control columns, which simplifies the number of control columns of the control system, and reduces the complexity of the structure of the control system. The control function has a more centralized design, and the failure of any independent control column will at most lead to the loss of an opening function of one emissions loop in the steam atmosphere emissions system, and an isolation function of the steam atmosphere emissions system will remain unaffected and be highly reliable.