Company Filing History:
2 out of 42,508 
1 out of 162 Years Active: 1990-1992
Title: Yoshishige Kawada: Innovator in Nuclear Fuel Technology
Introduction
Yoshishige Kawada is a notable inventor based in Hitachi, Japan, renowned for his contributions to nuclear fuel assembly technology. With a record of two patents to his name, Kawada has played a significant role in enhancing the efficiency and safety of nuclear energy systems.
Latest Patents
Kawada's latest patents focus on innovative designs for nuclear fuel assemblies. One of his key inventions describes a nuclear fuel assembly that comprises multiple fuel rods supported by a lower tie plate. This design features coolant apertures extending through the tie plate, which are strategically positioned to minimize leakage. The inclusion of peripheral apertures facilitates higher coolant velocity while managing flow more effectively around the assembly. Furthermore, the invention integrates venturis within the leakage path, allowing for better structural integrity by reducing deformation of the tie plate.
Another significant patent involves a novel fuel assembly mechanism where the small diameter portion of an upper end plug is fitted into a boss of an upper tie plate. This design incorporates an expansion spring enclosed by a cover member that extends upward, effectively minimizing pressure loss caused by the spring. These advancements reflect Kawada’s commitment to improving the design and functionality of nuclear fuel technology.
Career Highlights
Throughout his career, Yoshishige Kawada has collaborated with leading companies in the energy sector, including Hitachi, Ltd. and Hitachi Engineering Co., Ltd. His innovative approach and dedication to research and development have paved the way for advancements in nuclear technology.
Collaborations
Kawada's work has also benefited from collaborations with esteemed colleagues such as Hiromasa Hirakawa and Shozo Nakamura. These partnerships have allowed for the exchange of ideas and expertise, fostering an environment of creative problem-solving within the complex field of nuclear fuel technology.
Conclusion
Yoshishige Kawada's contributions to nuclear fuel assembly design exemplify the intersection of innovation and engineering. His patents not only address current challenges in the nuclear energy sector but also set the stage for future advancements in safety and efficiency. As he continues to develop groundbreaking technology, Kawada remains a prominent figure in the field of nuclear innovation.