[ASME 2013 21st International Conference on Nuclear Engineering - Chengdu, China (Monday 29 July 2013)] Volume 5: Fuel Cycle, Radioactive Waste Management and Decommissioning; Reactor Physics and Transport Theory; Nuclear Education, Public Acceptance and Related Issues; Instrumentation and Controls; Fusion Engineering - Research on Digital Instrumentation and Control System in Nuclear Power Plant Using Mixed Redundant Model