Faculty Profiles - Yutaro Aoki

写真a

Yutaro Aoki

Degree

Bachelor of Engineering Coursework ( 2016.3 Fukui University of Technology )
Master of Engineering Coursework ( 2018.3 Fukui University of Technology )
Doctor of Engineering Coursework ( 2021.3 Fukui University of Technology )

Research Interests

Small Modular Reactors
Gel Dosimeter
Nuclear Engineering
Radiation Chemistry

Research Areas

Life Science / Radiological sciences / Gel Dosimeter
Energy Engineering / Nuclear engineering / Application of Small Modular Reactors

Education

Fukui University of Technology Graduated

2012.4 - 2016.3
Fukui University of Technology Department of Applied Science and Engineering Master's Course Completed

2016.4 - 2018.3
Fukui University of Technology Department of Applied Science and Engineering Doctor's Course Completed

2018.4 - 2021.3

Research History

Fukui University of Technology

2021.4 - 2021.8
Fukui University of Technology Postdoctoral Researcher

2021.6 - 2021.8
Ontario Tech University Faculty of Energy System & Nuclear Science Post Doctoral Fellow

2021.9 - 2022.3
Fukui University of Technology Department of Applied Nuclear Technology Lecturer

2022.4 - 2025.3
Fukui University of Technology Department of Applied Nuclear Technology Associate Professor

2025.4

Professional Memberships

Atomic Energy Society of Japan

2016.4
The Japan Society of Mechanical Engineers

2017.6 - 2020.11
Japanese Society of Radiation Chemistry

2018.8

Papers

Dose evaluation study of PVA-KI gel dosimeter using RGB analysis method Reviewed International coauthorship

Takeyoshi Sunagawa, Glenn Harvel, Chisako Hishiki, Sachiko Yoshihashi, Yutaro Aoki

Memoirs of Fukui University of Technology ( 54 ) 43 - 48 2024.10

　More details

In cancer treatment using radiation, radiation visualization is an essential technology for accurately evaluating dose distribution. In this research, we developed a new measurement system that combines a blue organic EL light source specialized for PVA-KI gel dosimeters and a digital camera using a macro lens. Using this system, we imaged a PVA-KI gel irradiated with X-rays. The captured image was converted to RGB values. By comparing the photon count results obtained by ultraviolet-visible spectroscopy with the B value of RGB values, we clarified the relationship between the B value and the absorbed dose.
Study of in-situ measuring device for γ-ray irradiation of PVA-KI gel dosimeter Reviewed International coauthorship

Takeyoshi SUNAGAWA, Sachiko YOSHIHASHI, Glenn HARVEL, Yutaro AOKI

Memoirs of Fukui University of Technology ( 53 ) 46 - 51 2023.10
Dehydration of Decommissioning Gels for Waste Reduction Reviewed International coauthorship International journal

Glenn Harvel, Valeria Senka, Yutaro AOKI, Takeyoshi Sunagawa

5th Canadian Conference on Waste Management, Decommissioning and Environmental Restoration 2023.8

　More details

One method of decontamination or capture of loose contaminants during the decommissioning process is the use of gels. Gels have some advantages over water based solutions in that spills are much easier to clean up while a water based solution may penetrate the concrete or soil and spread contaminants further. One disadvantage of gels is that they include other constituents that increase the overall waste volume. Thus, will they can do an excellent job of capturing and securing loose contaminants, they will increase the total volume shipped to a waste site for disposal. Regardless of the hydrocarbon compound used in the gel, there is usually also some water present. In this work, we examine two methods for the reduction of the gel volume by eliminating the water content. For gels that use water as part of their creation, this can result in waste mass reduction by greater than 80% and possible volume reduction greater than 85%. The first method assessed is natural evaporation processes and the second method assessed is a distillation process. The first process is much slower but is more reliable in ensuring that the water is evaporated from the gel leaving a dry puck for easy disposal. The second process is able to obtain higher volume reductions faster and is also able to breakdown some of the hydrocarbons releasing other non-contaminants however the second method is more challenging to ensure there is no carry over the waste product. The paper will discuss the nature of the gels tested, both techniques, and the volume reduction results obtained to date.
Development of in situ measuring device for irradiation of PVA-KI gel dosimeter Reviewed International coauthorship

Takeyoshi SUNAGAWA, Glenn HARVEL, Yutaro AOKI, Kyo KUME

( 52 ) 34 - 39 2022.10

　More details

In recent years, radiation therapy, which enables local treatment without excising the affected area, has attracted attention in an aging society. In addition, high-precision radiotherapy that gives the maximum dose to the tumor and minimizes the dose to normal tissues is widespread, and it is necessary to perform dose verification in order to make a precise treatment plan. In our laboratory, using partially saponified polyvinyl alcohol (PVA) and potassium iodide (KI). We have developed a new gel-like chemical dosimeter that has excellent characteristics for X-ray and heavy ion beam visualization in the range of absorbed doses of 2 Gy to 20 Gy. In this study, we constructed a system for in situ measurement of light absorption by gel during He ion beam irradiation, and attempted to clarify the characteristics in the absorbed dose range by measuring less than 20 Gy.
Research and Development of PVA-KI Gel Dosimeter Reviewed International coauthorship

Y. AOKI, G. HARVEL, M. TAGUCHI, N. NAGASAWA, T. SAKURA, T. SUNAGAWA

2018 Pacific Basin Nuclear Conference 326 - 330 2018
Development of a Gel Type Dosimeter for X-ray Filds International coauthorship

Y. AOKI, G. HARVEL, T. SAKURA, and T. SUNAGAWA

2017 25th International Conference on Nuclear Engineering 9 ( V009T15A052 ) 2017.6

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Presentations

Study on dose estimation of PVA-KI gel dosimeter using RGB analysis method (Ⅲ) International coauthorship

Takeyoshi Sunagawa, Glenn Harvel, Sachiko Yoshihashi, Chisako Hishiki, Yutaro Aoki

2024.9
Applicability of SMR Technology in Japan - RI production by SMR- International coauthorship

Yutaro Aoki, Glenn Harvel

2024.9
Evaluation of X-ray Irradiation to PVA-KI Gel Dosimeter by Monte Carlo Method International coauthorship

Yutaro Aoki, Sachiko Yoshihashi, Glenn Harvel, Chisako Hishiki, Takeyoshi Sunagawa

2024.9
Study on dose estimation of PVA-KI gel dosimeter using RGB analysis method International coauthorship

Chisako Hishiki, Takeyoshi Sunagawa, Sachiko Yoshihashi, Glenn Harvel, Yutaro Aoki

2024.9
Applicability of SMR Technology in Japan Reactor -Offshore SMR- International coauthorship

Yutaro Aoki, Glenn Harvel

2024.3
Study on dose estimation of PVA KI gel dosimeter using RGB analysis method (II) International coauthorship

Takeyoshi Sunagawa, Glenn Harvel, Chisako Hishiki, Sachiko Yoshihashi, Yutaro Aoki

2024.3
Study on dose estimiation of PVA-KI gel dosimeter using RGB analysis method International coauthorship

2023.9
DEHYDRATION OF DECOMMISSIONING GELS FOR WASTE REDUCTION Invited International coauthorship International conference

G. Harvel, V. Senka, R. Khurmi, Y. Aoki, T. Sunagawa

5th Canadian Conference on Nuclear Waste Management, Decommissioning and Environmental Restoration 2023.8 The Canadian Nuclear Society

　More details

One method of decontamination or capture of loose contaminants during the decommissioning process is the use of gels. Gels have some advantages over water based solutions in that spills are much easier to clean up while a water based solution may penetrate the concrete or soil and spread contaminants further. One disadvantage of gels is that they include other constituents that increase the overall waste volume. Thus, will they can do an excellent job of capturing and securing loose contaminants, they will increase the total volume shipped to a waste site for disposal. Regardless of the hydrocarbon compound used in the gel, there is usually also some water present. In this work, we examine two methods for the reduction of the gel volume by eliminating the water content. For gels that use water as part of their creation, this can result in waste mass reduction by greater than 80% and possible volume reduction greater than 85%. The first method assessed is natural evaporation processes and the second method assessed is a distillation process. The first process is much slower but is more reliable in ensuring that the water is evaporated from the gel leaving a dry puck for easy disposal. The second process is able to obtain higher volume reductions faster and is also able to breakdown some of the hydrocarbons releasing other non-contaminants however the second method is more challenging to ensure there is no carry over the waste product. The paper will discuss the nature of the gels tested, both techniques, and the volume reduction results obtained to date.
Considerations of applying nuclear technology in the remote northern communities of Canada International coauthorship International conference

Glenn Harvel, Yutaro Aoki

30th International Conference on Nuclear Engineering 2023.5 The Japan Society of Mechanical Engineers, The American Society of Mechanical Engineers, Chinese Nuclear Society
Research and development of lead block cutting technique for decommissioning nuclear power plants International coauthorship International conference

Tomohisa Gotou, Takeyoshi Sunagawa, Glenn Harvel, Yutaro Aoki

30th International Conference on Nuclear Engineering 2023.5 The Japan Society of Mechanical Engineers, The American Society of Mechanical Engineers, Chinese Nuclear Society
Applicability of SMR Technology in Japan Reactor -Thermal Application- International coauthorship

2023.3
Research and development of lead block cutting technique for decommissioning nuclear power plants Ⅱ International coauthorship

2023.3
Study of light absorption in-situ measurement by γ ray irradiation to PVa-KI gel dose meter International coauthorship

2023.3
Applicability of SMR Technology for Japan International coauthorship International conference

Glenn HARVEL, Yutaro AOKI

41st Annual Conference of the Canadian Nuclear Society 2022.6 Canadian Nuclear Society

　More details

As the world considers SMRs as an option for climate change, the use of SMRs in different regions needs to be considered. Japan has successfully restarted 9 of its large reactors since the Fukushima Daiichi event all of which are large scale reactors. In Japan, which depends on imports for energy resources, nuclear power generation is an important source of base-load power. On the other front, the place where Japanese nuclear power plants can be installed are limited. Therefore, a large scale reactor is required for a nuclear reactor operated to obtain maximum power from the site area. This is challenging to install SMRs only for the purpose of obtaining electric power in Japan. Thus, it is important to examine multipurpose uses of SMRs in Japan to determine whether there is a role for them to play. This paper examines the current status of SMR designs and their potential use for non-power applications. The paper also reviews the non-power requirements in Japan and attempts to match possible SMR types against non-power requirements. Considerations such as heat for chemical processes, hydrogen production, are discussed.
Research and Development of PVA-KI Gel Dosimeter International coauthorship International conference

2018 Pacific Basin Nuclear Conference 2018.10 American Nuclear Society
Development of a Gel Type Dosimeter for X-ray Fields International coauthorship International conference

Y. AOKI, G. HARVEL, T. SAKURA, and T. SUNAGAWA

2017 25th International Conference on Nuclear Engineering 2017.7 American Society of Mechanical Engineers

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Teaching Experience

FUT Practical Studies Exercise Ⅰ

2022.4
Institution：Fukui University of Technology
Fundamental engineering experiment (Radiation measurement experiment)

2022.4
Institution：Fukui University of Technology
Advanced Nuclear Power Engineering

2022.4
Institution：Fukui University of Technology
career seminar Ⅲ

2022.4
Institution：Fukui University of Technology
career seminar Ⅰ

2022.4
Institution：Fukui University of Technology
Project Study

2022.4
Institution：Fukui University of Technology
Nuclear Robotics

2022.4
Institution：Fukui University of Technology
Nuclear Reactor Plant Engineering

2022.4
Institution：Fukui University of Technology
Fundamental engineering experiment (Electrical and mechanical experiments)

2022.4
Institution：Fukui University of Technology
Advanced Nuclear Energy Systems Engineering

2022.4
Institution：Fukui University of Technology
Fundamental engineering experiment (Non-destructive testing experiments)

2022.4
Institution：Fukui University of Technology
FUT Practical Studies Exercise Ⅱ

2022.4
Institution：Fukui University of Technology
Differential and Integral Calculus I

2022.4
Institution：Fukui University of Technology

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