Riken Corporation

Hiroyoshi Sakurai

Reiko Fujita

Koji Mizuguchi

Masatoshi Kawashima

Hiroki Okuno

Yoshiharu Mori

Susumu Shimoura

Hideaki Otsu

Hiroyuki Oigawa

Teiichiro Matsuzaki

Masaki Ozawa

Koji Nitta

Koji Niita

An accelerator () includes: a plurality of acceleration cavities () having one or two acceleration gaps; and a plurality of first control means () provided with respect to each of the plurality of acceleration cavities, each of the plurality of first control means independently generating an oscillating electric field and controlling a motion of an ion beam inside a corresponding acceleration cavity. In addition, M-number of multipole magnets () which generate a magnetic field and which control a motion of an ion beam may be provided downstream to N-number of acceleration cavities. The first control means independently controls acceleration voltage and a phase thereof and supplies radiofrequency power. Accordingly, particularly in a front stage of acceleration, a DC beam from an ion generation source can be adiabatically captured.

Accelerator and accelerator system

Provided is a fission product processing method for selectively transmuting only a long-lived radionuclide from fission products. The method for processing radioactive waste includes the step of extracting, from the radioactive waste, the isotopes without isotope separation, the isotope elements including radionuclides of fission products and having a common atomic number, and the step of irradiating the isotopes with high-energy particles generated by an accelerator to produce nuclear transmutation of a long-lived radionuclide of the radionuclides into a short-lived radionuclide with a short half-life or a stable nuclide re-utilizable as a resource.

Radioactive waste processing method

Growing community of inventors

Saitama, Japan

Hiroyoshi Sakurai