Updated on 2025/04/02

写真a

 
SIMANULLANG LIAPTO IRWAN
 
Organization
Faculty of Engineering Department of Applied Quantum Physics and Nuclear Engineering Assistant Professor
School of Engineering (Concurrent)
Graduate School of Engineering (Concurrent)
Title
Assistant Professor
Contact information
メールアドレス
Tel
0928023486
Profile
I am performing research for innovative nuclear systems of small high-temperature gas-cooled reactors (HTGRs). Currently, I am focusing on the new composite-based moderator concept as a replacement for graphite as a moderator. It is important to investigate the new composite-based moderator to support the small HTGRs to achieve high fuel consumption utilization and less spent fuel.
External link

Research History

  • March 2018 - September 2021: Postdoctoral Researcher at Criticality Safety Research Group, Japan Atomic Energy Agency (JAEA)   

    March 2018 - September 2021: Postdoctoral Researcher at Criticality Safety Research Group, Japan Atomic Energy Agency (JAEA)

  • Oct 2017 - Mar 2018 : Researcher at Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology   

Research Interests・Research Keywords

  • Research theme: Development of Small Modular Reactors (SMRs) based on the High-Temperature Gas Cooled Reactor design.

    Keyword: SMR, HTGR, Burnup performance, Power distribution

    Research period: 2022.11 - 2025.11

Papers

  • Study on potential burnable poison materials for a small modular block-type HTGR design using MgO-BeO as a composite-based moderators Reviewed

    Irwan L. Simanullang, Nozomu Fujimoto

    Nuclear Engineering and Design   431 ( 113742 )   2024.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.nucengdes.2024.113742

  • Burnable Poisons Utilization in the Small HTGR with MgO-BeO as a Composite-Based Moderator Material Reviewed

    Irwan L. Simanullang, Nozomu Fujimoto

    2024.11

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

  • Preliminary study of a small high-temperature gas-cooled reactor (HTGR) concept with MgO–BeO moderators

    Simanullang I.L., Fujimoto N.

    Nuclear Engineering and Design   420   2024.4   ISSN:00295493

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    Publisher:Nuclear Engineering and Design  

    Graphite plays a crucial role as a moderator and reflector in high-temperature gas-cooled reactors (HTGRs). However, under high-irradiation conditions, graphite exhibits microcracking within the operational period. Studies have been investigated the potential of composite-based materials for replacing graphite in HTGRs. This study focused on a magnesium oxide (MgO)-based composite material as the host matrix and a homogeneously distributed beryllium oxide (BeO) as the entrained moderating phase and investigated the feasibility of the MgO–BeO as the new moderator in a small HTGR to achieve high burnup performance. In this study, the conceptual design of the HTR50S was selected as one of the candidates for the small HTGR concept. Burnup calculations and safety evaluation in HTR50S design were performed. The Monte Carlo MVP 3.0 and MVP-BURN codes were used in this study for neutronic calculations. Results revealed that a high burnup of 80 GWd/t can be achieved using a fuel composition of 6 kg heavy metal per fuel block with 17 wt% of 235U enrichment. Furthermore, a negative temperature coefficient of reactivity was achieved during the operation period.

    DOI: 10.1016/j.nucengdes.2024.113036

    Scopus

  • Preliminary study of a small high-temperature gas-cooled reactor (HTGR) concept with MgO–BeO moderators Reviewed International journal

    Irwan L. Simanullang, Nozomu Fujimoto

    Nuclear Engineering and Design   420   2024.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.nucengdes.2024.113036

    Repository Public URL: https://hdl.handle.net/2324/7172128

  • Feasibility of using BeO rods as secondary neutron sources in the long-life fuel cycle high-temperature gas-cooled reactor Reviewed International journal

    @Hai Quan Ho, @Toshiaki Ishii, @Satoru Nagasumi, @Masato Ono, @Yosuke Shimazaki, @Etsuo Ishitsuka, @Hiroaki Sawahata, @Minoru Goto, #Irwan Liapto Simanullang, #Nozomu Fujimoto, @Kazuhiko Iigaki

    Nuclear Engineering and Design   2024.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.nucengdes.2023.112795

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Presentations

  • Introducing the Next Generation of Nuclear Power Plant: Small Modular Reactor High Temperature Gas Cooled Reactors Invited International conference

    Irwan Liapto Simanullang

    Kyushu University Forum "Kyudai Now" in Thailand  2024.3  Kyushu University Institute for ASIAN and OCEANIAN STUDIES

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    Event date: 2024.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Crown Plaza Bangkok Lumpini Park   Country:Thailand  

  • Measurement of Cadmium Reactivity Worth at UTR-KINKI

    Irwan L. Simanullang, N. Fujimoto, Atsushi Sakon

    Atomic Energy Society of Japan 2025 Annual Meeting  2025.3 

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    Event date: 2025.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  • Machine Learning Implementation for Improving Parameter PRediction in High Temperature Gas Cooled Reactors (HTGR) Invited

    Irwan Liapto Simanullang

    数理・データサイエンスに関する教育・研究支援プログラム  2024.12  九州大学

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    Event date: 2024.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  • Core Geometry and Reflector Optimization of 10 MWt Micro-Peluit Pebble Bed HTGR International coauthorship International conference

    F. Miftasani, N. Widiawati, N. Trianti, T. Setiadipura, D. Irwanto, Z. Su'ud, Irwan Simanullang

    International Conference on Small Modular Reactors and Their Applications  Internaitonal Atomic Energy Agency

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    Event date: 2024.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna   Country:Austria  

  • Power Distribution Optimized in a Prismatic Type HTGR using MgO-BeO as a Composite Moderator

    Irwan Liapto Simanullang

    日本原子力学会  2024.9  Atomic Energy Society of Japan

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    Event date: 2024.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Tohoku University Kawauchi Kita Campus   Country:Japan  

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Professional Memberships

  • Atomic Energy Society of Japan

  • International Indonesian Scholars Association

Academic Activities

  • Screening of academic papers

    Role(s): Peer review

    2024

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    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:2

  • Session Chair International contribution

    International Conference on Nuclear Criticality Safety  ( Sendai International Center Japan ) 2023.10

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    Type:Competition, symposium, etc. 

  • Screening of academic papers

    Role(s): Peer review

    2023

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    Type:Peer review 

    Proceedings of International Conference Number of peer-reviewed papers:4

  • Screening of academic papers

    Role(s): Peer review

    2022

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    Type:Peer review 

    Proceedings of International Conference Number of peer-reviewed papers:8

Research Projects

  • Implementation of Machine Learning to improve and optimize parameter prediction in High Temperature Gas Cooled Reactor (HTGR)

    2024.7 - 2025.3

    九州大学 数理・データサイエンス教育研究センター 

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    Authorship:Principal investigator  Grant type:On-campus funds, funds, etc.

  • Kyushu University Institute for Asian and Oceanian Studies (Q-AOS)/ Introducing the next generation nuclear power plant: HTGR conceptual design.

    2024

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    Grant type:Donation

Educational Activities

  • I am participating in educational activities, especially in experimental classes such as Quantum Science and Engineering Experiment, Basic Science Experiment, and a practical class for bachelor students.

Class subject

  • 創造科学工学基礎実験

    2024.10 - 2025.1   Second semester

  • 量子物理工学実験

    2024.4 - 2025.3   Full year

  • 課題演習

    2024.4 - 2024.7   First semester

  • 創造科学工学基礎実験

    2023.10 - 2024.3   Second semester

  • 課題演習

    2023.10 - 2023.12   Fall quarter

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Social Activities

  • Study on Nuclear Energy and Hydrogen Production in Indonesia

    Embassy of The Republic of Indonesia in Japan  Japan (online)  2022.12

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

    Type:Other

  • Virtual Course: Introduction to Nuclear Reactor Safety

    Siwabessy Initiative  Online  2022.7

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

    Type:Seminar, workshop

  • Nuclear Energy Technology, Challenge, Opportunity, and Competencies Needs

    Department of Nuclear Engineering and Engineering Physics, University of Gadjah Mada, Indonesia  Online Lecture  2022.5

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

    Type:Lecture

Acceptance of Foreign Researchers, etc.

  • Indonesia Nuclear Energy Regulatory Agency

    Acceptance period: 2024.10 - 2024.12   (Period):1 month or more

    Nationality:Indonesia

    Business entity:Ministry of education