Transmutation of Sr-90 by inertial confinement fusion is discussed. A
pellet composed of deuterium-tritium fuel surrounded by Sr-90 is compr
essed by a laser or a particle beam. It is shown that a high transmuta
tion rate and a small transmutation energy are obtained because of the
highly compressed Sr-90, which has a large probability of a transmuta
tion reaction. The number of cycles, including recovering and refabric
ation of the target, is also discussed.