Prof. Koji OKAMOTO
Director
General, CLADS, Japan Atomic Energy Agency
He
graduate the University of Tokyo and got Ph.D on 1992.
Abstract:After Fukushima-Daiichi NPP Accidents, the nuclear power plant
should be safety first. No more severe accidents should happen around the
world. Nuclear energy is and will be a superior energy resource for sustainable
future. To satisfy these requirements, Safety First Nuclear System with
advanced technology are strongly expected. Japan Atomic Energy Agency (JAEA) is
working to develop the Safety First Nuclear Systems. High-Temperature Gas-cooled
Reactor (HTGR) is one of the candidates of Safety First Nuclear Systems. The
basic three safety requirements, i.e., Stop chain reaction, Cool residual heat,
Confine radioactive materials, are physically provided. Negative reactivity
core characteristics automatically stops chain reaction during the accidents.
Radiation heat transfer automatically cools the core. TRISO particle confines
fission products. HTGR produces high-temperature, therefore, not only the
electricity, these heats can be used as industrial heat source, desalination,
hydrogen production and so on.
The concept of Safety-First Nuclear Systems would be a promising
concept after Fukushima. JAEA will continue to develop the Safety-first Nuclear
Systems. Also, for the sustainable future, Safety Decommissioning of Fukushima
is JAEA's responsibility too. JAEA is contributing to the researches on
Fukushima-Daiichi Decommissioning. Collaborative Laboratories for Advanced
Decommissioning Sciences (CLADS) is the international central research center for
decommissioning in JAEA. Our research topics include remote control system
development, debris characterization, accident event progression evaluation and
so on.
The current research and development
activities in Japan for safety nuclear system and decommissioning science will
be discussed.
