Location History:
- Tokai, JP (1986 - 1991)
- Mito, JP (1982 - 1992)
- Ibaraki, JP (1993)
Company Filing History:
12 out of 196 
1 out of 1,100 Years Active: 1982-1993
Title: Innovations of Katsuyuki Ohtsuka
Introduction
Katsuyuki Ohtsuka is a notable inventor based in Mito, Japan. He has made significant contributions to the field of nuclear technology, holding a total of 12 patents. His work focuses on methods for handling radioactive materials, showcasing his commitment to safety and environmental protection.
Latest Patents
One of his latest patents is a method of recovering and storing radioactive iodine by freeze vacuum. This invention provides a process for recovering radioactive iodine from off-gas generated during the treatment of spent fuel. The method involves scrubbing the off-gas and, if necessary, using a precipitation treatment with additives. The waste liquid containing radioactive iodine is then freeze-dried, allowing for the safe recovery of iodine compounds. This process prevents the vaporization of radioactive iodine, thereby eliminating its release into the environment. Additionally, it reduces the consumption of collecting agents like silver zeolite. The recovered iodine compounds are solidified and mineralized, enabling the long-term storage of long half-life radioactive iodine in stable minerals.
Another significant patent is a method of separating and purifying spent solvent generated in the nuclear fuel cycle. This method treats the spent solvent at a temperature that selectively freezes higher hydrocarbons while concentrating phosphates. The resulting frozen solid is separated from the remaining solution, which may undergo further low-temperature vacuum distillation to isolate the phosphate and its deterioration products.
Career Highlights
Katsuyuki Ohtsuka has worked with several prominent companies, including Doryokuro Kakunenryo Kaihatsu Jigyodan and Kobe Steel, Ltd. His experience in these organizations has contributed to his expertise in nuclear technology and innovation.
Collaborations
Throughout his career, Ohtsuka has collaborated with notable colleagues such as Jin Ohuchi and Hitoshi Miyazaki. These partnerships have likely enhanced his research and development efforts in the field.
Conclusion
Katsuyuki Ohtsuka's innovative work in nuclear technology demonstrates his dedication to improving safety and efficiency in handling radioactive materials. His patents reflect a deep understanding of the challenges in this field and offer practical solutions for the future.