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The APR1400 currently being marketed for export by KEPCO has had added to its design significant enhancements in regard to safety as well as increased power capabilities. Based upon the predecessor OPR1000 reactor and Korea’s experience gained over the country’s non-stop development of nuclear reactors, the upgraded APR1400 has been designed to utilize the proven technology of the earlier model while offering more in terms of safety, performance, construction period, operation and of course, economics.
By adopting advanced design features based on self-reliant technologies as well as on the technologies of the System 80+, whose design was certified by the Nuclear Regulatory Commission, Korea developed the APR1400 to meet the Korean Utility Requirement Document (KURD) reflecting the Advanced Light Water Reactor (ALWR) design requirements developed by the Electric Power Research Institute (EPRI) and other nuclear power related bodies. The lifespan of the APR1400 reactor was also increased to 60 years, 20 years longer than its OPR1000 predecessor, a reactor which was developed as an integral part of Korea’s NPP standardization program begun in 1984. Ulchin Unit 3 was the first OPR1000 to go into operation in 1998, three years after Korean NPPs had reached a level of 95 percent indigenous technology.
Advanced Power Reactor 1400
A is Tranformer Area
B is Turbine Building
C is Switchgear Building
D is Compound Building
E is Auxiliary Building
F is Containment Building

Advanced Design

  • 4-train direct vessel injection safety system and fluidic device in safety injection tank
  • In-containment refueling water storage tank
  • Digital I&C and operator-friendly man-machine interface

Enhanced Safety

  • Adoption of proven & evolutionary technologies
  • Reduced core damage & containment failure frequency
  • Reinforced seismic design basis
  • Improved severe accident mitigation system

Improved Cost Effectiveness

  • Extended plant design lifetime
  • Reduced operation & construction cost
  • Minimum site boundary via plant general arrangement optimization
  • State-of-the-art construction technologies

Convenient Operation & Maintenance

  • Extended operator response time
  • Reduced occupational exposure
  • Convenient facilities for improved maintenance & inspection