Study on thermal-hydraulics and critical heat flux,
accident analysis, probabilistic safety analysis, advanced
and passive nuclear reactor design, nuclear power plant
simulation, nuclear micro/nano system, human-machine
interface.

1981~1982 Bechtel Power Corporation
1982~ Professor, KAIST
1988~1991 Department Chairman, KAIST
2001~2003 Dean, Office of Planning, KAIST
2003~ Dean, Office of Academic Affairs, KAIST
1987~1992 Editor, System Safety and Reliability Engineering"
1993~1997 Member, Atomic Energy Commission
1998~1999 Member, Presidential Advisory Committee on Science and Technology
1997~2003 Commissioner, Korea Nuclear Safety Commission
2001~ Chairman, Advisory Committee on Nuclear Safety
1992~1999 Member, International Nuclear Safety Advisory Group, IAEA
1999~ Member, Safety Committee, OECD/NEA

1989 The Best Academy Award in Korean Nuclear Society
1994 The Best Paper Award, American Nuclear Society
1995 The Best Paper Award, KOFST
1996 The Creative Research Award, KAIST
2003 Technical Achievement Award, American Nuclear Society
2003 Korea Red Stripe Medal