The invention discloses a function
distribution method and
system of a nuclear safety level digital
instrument control system and a medium. Relates to the technical field of nuclear safety level
instrument control design. The method is improved on the basis of the traditional technology, an FD / SAMA graph is analyzed to construct a same-level
system interface graph and an internal system
relation graph on the basis of meeting function dispersion and diversity design, and the internal
system interface graph and the internal system
relation graph are constructed on the basis of a same-class merging rule, a priority rule and a
mutual exclusion rule. Performing function distribution on each site of the nuclear
security level digital
instrument control system by combining a same-level
system interface diagram and an internal system relation diagram, performing system operation calculation on each group of function distribution schemes, and screening out an optimal function distribution scheme; the function distribution design is optimized, the
coupling between systems is reduced, the
response time, the load rate and the margin of each subsystem are ensured to meet the requirements, the design quality is improved, the design efficiency is improved, the later design iteration is reduced, and the design period is shortened.