Abstract: In order to undertake the construction project of the nuclear power plant in UK, Nuclear Safety Review and License Application for Nuclear Power Projects shall pass the GDA review conducted by UK ONR firstly. The GDA review is based on the SAPTAG guidelines that issued by ONR, and related IAEAWENRA guidelines and IEC standards. Through analyzing I&C design issues that are concerned by ONR and requirements of relevant guidelines and standards, based on the review experience of UK-EPR and UK-AP1000, the I&C overall architecture design strategies are proposed. It can be used as a reference for the follow-up GDA review project.