Yoshitaka Doken

Title: Yoshitaka Doken: Inventor in Neutron-Shielding Technology.

Introduction

Yoshitaka Doken is an inventor based in Yokohama, Japan, whose patent work includes materials and technologies for neutron shielding. His listed portfolio includes 2 patents, and he is associated with Kabushiki Kaisha Toshiba.

Latest Patents

Doken’s latest listed patent is “Neutron Shielding Material, Method of Manufacturing the Same, and Cask for Spent Fuel.” The invention describes boron-added stainless steel designed for neutron shielding, with either an austenite-ferrite two-phase structure or a ferritic structure.

For the two-phase stainless steel, the described composition includes 0.5% to 2.0% boron, 3.0% to 10.0% nickel, and 21.00% to 32.00% chromium by mass. The ferritic stainless steel option includes 0.5% to 2.0% boron, no more than 4.0% nickel, and 11.00% to 32.00% chromium by mass. The patent highlights the material’s ductility and thermal conductivity, properties relevant to its use in spent-fuel casks.

Career Highlights

Doken’s listed patent activity reflects work on materials engineering for nuclear applications. The described invention combines boron-bearing stainless steel with specified alloy compositions to provide neutron shielding while retaining useful mechanical and thermal properties.

Collaborations

Doken’s listed coworkers include Masanori Kibata and Motoji Tsubota. The patent information provided identifies Kabushiki Kaisha Toshiba as the company associated with his work.

Conclusion

Yoshitaka Doken’s patent work centers on boron-added stainless steel for neutron shielding, with potential application in casks for spent fuel.