• IEC TC45 SC45A member – sponsored by MOTIE  and KATS
  • IEC TC45 SC45A WG 3
    • IEC 61500 Nuclear power plants - Instrumentation and control important to safety - Data communication in systems performing category A functions, technical secretariat
  • IEC TC45 SC45A WG 2
    • IEC 60744 – Safety logic assemblies of nuclear power plants - Characteristics and test methods project leader (kwangyoung sohn, South Korea)
  • IEC TC45 SC45A WG 3, 7
    • TR for I&C platform qualification, co-project leader (Mr. Horst Miedl (Germany), kwangyoung Sohn (South Korea), Technical assistant (changhwan cho)
      • Performing government project by preparing New Work Item Proposal on CGID for hardware and software)
  • IEC TC45 SC45A WG 9
    • IEC/IEEE - 60780/323 - Qualification 

  • ISO TC 085 WG5 - Waste characteristic
    • Non-acid decontamination