2012NB/T 20093-2012 Qualification of safety-related valve actuators for nuclear power plants
2001EJ/T 531-2001 Qualification of actuators for power-operated valve assemblies with safety-related functions for nuclear power plants
1990EJ 531-1990 Appraisal of Safety Class Valve Actuators in Nuclear Power Plants
EJ/T 531-2001 Qualification of actuators for power-operated valve assemblies with safety-related functions for nuclear power plants was changed to NB/T 20093-2012 Qualification of safety-related valve actuators for nuclear power plants.