The US Nuclear Regulatory Commission has certified the Korean-designed Advanced Power Reactor 1400. The certificate states that the NRC finds the APR-1400 design fully meets US safety requirements. //

Kepco noted the APR-1400 is the first "non-US type" reactor design to be certified by the NRC. The US regulator has already certified five other standard reactor designs: General Electric's Advanced Boiling Water Reactor (ABWR); Westinghouse's System 80+, AP600 and AP1000; and, GE's Economic Simplified Boiling Water Reactor. It is also reviewing applications to certify Mitsubishi's US Advanced Pressurised Water Reactor (US-APWR) and the NuScale small modular reactor. NRC staff are also reviewing an application to renew the ABWR certification.

In October 2017, European Utility Requirements - a technical advisory group for European utilities on nuclear power plants - approved the APR1400 reactor design.