【重要】T2R2・STARSearchの停止と後継システムについて

論文

• Charlotte ORGONASI, Kenji Nishihara, Clara Luzieux, Takumi Abe, Tomohiro Okamura, Masahiko Nakase. Prediction of Plutonium content of BWR/MOX Fuel using a neural network, Annals of Nuclear Energy, Vol. 240, 112713, Aug. 2026.
• Ryo Hamada, Tomofumi Sakuragi, Hidekazu Asano, Masahiko Nakase. Trade-off between repository footprint and radiotoxicity in geological disposal of vitrified high-level waste from spent MOX fuels: Quantitative assessment of simplified minor actinide separation, Annals of Nuclear Energy, Vol. 240, 112701, July 2026.
• 新里忠史, 岡村知拓, 小曽根健嗣, 中瀬正彦, 齋藤龍郎, 大井貴夫, 亀井玄人. 研究施設等廃棄物の埋設事業における生成AIを活用した技術情報管理システムの開発計画, 情報地球学, Vol. 37, No. 2, pp. 53-62, June 2026.
• Masahiko Nakase, Ryota Nakazawa, Ria Mishima. Mechanistic Elucidation of Platinum Group Metal Separation by Aluminum Hexacyanoferrate in Nitric Acid Systems, Next Chemical Engineering, Vol. 2, 100051, May 2026.
• Masahiko Nakase, Tomohiro Okamura, Takahiro Nishihara. Design and development of an informatics framework for actinide extractant discovery leveraging the IDEaL Database, Bulletin of the Laboratory for Zero-Carbon Energy, Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, Vol. 4, No. 2025, p. 27, Apr. 2026.
• Tomohiro Okamura, Takahiro Nishihara, Masahiko Nakase. TASKI: AI Based Nuclear Knowledge Management System, Bulletin of the Laboratory for Zero-Carbon Energy, Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, Vol. 4, No. 2025, p. 42, Apr. 2026.
• Ryota Nakazawa, Masahiko Nakase. Investigation of phase equilibrium of TiO₂–CeO₂ system for prediction of precipitated phase during solidification of radioactive waste into SYNROC, Bulletin of the Laboratory for Zero-Carbon Energy, Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, Vol. 4, No. 2025, p. 43, Apr. 2026.
• Masahiko NAKASE, Tatsuro MATSUMURA, Ryo HAMADA, Chi Young HAN, Go CHIBA, Tomofumi SAKURAGI, Hidekazu ASANO. Strategic Selection of Nuclear Fuel Cycle Backend Options: A Framework Incorporating MA Separation and Final Disposal by Multi-Criteria Evaluation, Annals of Nuclear Energy, Vol. 233, 112267, Mar. 2026.
• Ryota Nakazawa, Satofumi Maruyama, Ryosuke Maki, Lewis R. Blackburn, Colin Boxall, Masahiko Nakase. Comparison Study on Crystalline Phases in Ce-bearing Titanate SYNROC Synthesized by Conventional and Spark Plasma Sintering, Reviewed proceedings of Waste Management Symposia 2026 (WM2026), Mar. 2026.
• Takumi Abe, Taiga Suzuki, Tomohiro Okamura, Masahiko Nakase. Implementation of ideal cascade model for uranium enrichment to nuclear fuel cycle simulator, Annals of Nuclear Energy, Vol. 232, p. 112224, Feb. 2026.
• Saki Ozawa, Yudai Shiozawa, Yoshitaka Saijo, Tatsuya Miyajima, Daiju Matsumura, Takuya Tsuji, Masahiko Nakase, Terutaka Maehara. Redox Dynamics of Cerium Ions in Soda-Lime Glass during Cooling Analyzed by in situ X-ray Absorption Fine Structure, Journal of the American Ceramic Society, Vol. 109, Issue 3, e70621, Feb. 2026.
• Andika Putra Dwijayanto, Kenji Nishihara, Tomohiro Okamura, Masahiko Nakase. Preliminary Design and Front-end Fuel Cycle Assessment of 200 MWt Marine Molten Chloride Fast Reactor, Annals of Nuclear Energy, Vol. 229, No. 2026, p. 112124, Jan. 2026.

国際会議発表 (査読有り)

• Ryota Nakazawa, Satofumi Maruyama, Ryosuke Maki, Lewis R. Blackburn, Colin Boxall, Masahiko Nakase. Comparison Study on Crystalline Phases in Ce-bearing Titanate SYNROC Synthesized by Conventional and Spark Plasma Sintering, Waste Management Symposia 2026 (WM2026), Mar. 2026.

国際会議発表 (査読なし・不明)

• Masahiko Nakase, Takahiro Nishihara, Mamura Tsuneyuki, Hisao Sato. Enhancement of the PHAST code toward an extensible geochemical simulation framework involving glass corrosion: development and preliminary application of JPHAST, 11th International Congress on Ceramics (ICC’11), Sept. 2026.
• Qiushi Wang, Ahid Nurmanjaya, Martin Duarte, Ryota Nakazawa, Masahiko Nakase. Development and Evaluation of Functionalized Diglycolamide-Based Hydrophobic Deep Eutectic Solvents for Platinum Group Metal Extraction, The 13th International Conference on Separation Science and Technology (ICSST26), Sept. 2026.
• Kenji Takeshita, Tomohiro Okamura, Masahiko Nakase, Takashi Shimada, Yuki Kinishi, Keisuke Nishimura, Hitomi Ishida, Tomoo Yamamura. Nuclear Fuel Cycle Simulation for Actinide Management Towards Sustainable Nuclear Energy Use (2) Minor Actinide Management, GLOBAL2026, Aug. 2026.
• Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Takashi Shimada, Yuki Konishi, Keisuke Nishimura, Hitomi Ishida, Tomoo Yamamura. Nuclear Fuel Cycle Simulation for Actinide Management Towards Sustainable Nuclear Energy Use (1) Uranium and Plutonium Management, GLOBAL2026, Aug. 2026.
• Masahiko Nakase. [Invited] Studies on Waste Management and Disposal: Applications to Fukushima (1F) Decommissioning and Nuclear Fuel Cycle Systems, HHGW Research Forum 2026, July 2026.
• Andika Putra Dwijayanto, Kenji Nishihara, Tomohiro Okamura, Masahiko Nakase. Fuel Cycle Simulation for Marine Molten Chloride Fast Reactor: Verification and Case Study, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  公式リンク  
  
• Alessio Rossi, Masahiko Nakase, Tomohiro Okamura, Kenji Nishihara. Towards a World Model of the Nuclear Fuel Cycle (1) From Past Reconstruction to Future Assessment of Fuel Demand, Waste Treatment and Strategic Stability, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  公式リンク  
  
• Taiga Mitsuyuki, Tomohiro Okamura, Masahiko Nakase, Shinnosuke Wanaka. Strategic Roadmapping and Implementation Pathways for Nuclear-Powered Ships toward 2050 Net-Zero Shipping, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  公式リンク  
  
• Tomohiro Okamura, Koki Ono, Taiga Suzuki, Takumi Abe, Takahiro Nishihara, Masahiko Nakase, Kenji Nishihara. NMB4 Validation Based on Historical Nuclear Power Plant Operating Records in Japan, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  公式リンク  
  
• Kenji Nishihara, KENJI TAKESHITA, Takashi Shimada, Naoto Aizawa, Masahiko Nakase, Satoshi Wada, Shingo Wakasaki, Minefumi Matsui, Yoshiaki Yasunaga, Tomohiro Okamura, Takumi Abe, Manabu Yoshida, Hiroaki Nagano, Yoshio Kimura, Ayako Ono, Masatoshi Yamazaki, Masayuki Naganuma, Sou Watanabe, Tomoko Murakami, Tadafumi Koyama, Daisuke Watanabe, Sho Fuchita, Yuji Fukaya, Masako De Franco, Hiroshi SAGARA, Yoichiro Shimazu, Liem Peng Hong, Koji Fujikura. Benchmark Activity in Atomic Energy Society of Japan for Improvement of Reliability of Nuclear Fuel Cycle Simulators, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  公式リンク  
  
• Masahiko Nakase, Charlotte Orgonasi, Tomohiro Okamura, Kenji Nishihara. Enhancing Economic Evaluation Frameworks for MOX Fuel Cycles through Machine Learning-Based Reactivity Prediction, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  公式リンク  
  
• Subrata Saha, Andika Putra Dwijayanto, Alessio Rossi, Masahiko Nakase. VVER-1200 Reactor Modeling and Nuclear Fuel Cycle Simulation for the Bangladesh Nuclear Energy Scenario Using NMB 4.0, TWoFCS2026 (The 7th Technical Workshop on Fuel Cycle Simulation 2026), Apr. 2026.  公式リンク  
  

国内会議発表 (査読なし・不明)

• 竹下健二, 岡村知拓, 中瀬正彦. 原子燃料の安定供給に資する核燃料サイクル政策について, 日本保全学会第22回学術講演会 原子力“再”ルネッサンスを支える保全学, Sept. 2026.
• Andika Putra Dwijayanto, Masahiko Nakase. Neutronic Design of Simple-Sustainable Molten Chloride Fast Reactor without Complex Reprocessing, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  公式リンク  
  
• Andika Putra Dwijayanto, Tomohiro Okamura, Masahiko Nakase. Higher-Order Plutonium Transmutation Scenario in a 200 MWt Molten Chloride Fast Reactor with Thorium Additive, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  公式リンク  
  
• Qiushi Wang, Ahid Nurmanjaya, Martin Duarte, Ryota Nakazawa, Masahiko Nakase. Design and Evaluation of Novel Hydrophobic Deep Eutectic Solvents for Platinum Group Metal Extraction from Nitric Acid Media, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  公式リンク  
  
• 朝野英一, 西原尚宏, 岡村知拓, 中瀬正彦. TASKI:AIを基盤とした原子力ナレッジマネジメントシステム(6) 理系学部生向け地層処分講義の学習効果に関する教員採点とAIを活用した概念ネットワーク分析の比較, 日本原子力学会2026年秋の大会, Sept. 2026.  公式リンク  
  
• 佐藤久夫, 前村庸之, 西原尚宏, 中瀬正彦, 岡村知拓. オールジャパンで取り組む新しいオープンソース地球化学解析コードJPHASTの開発(3) 地下水－岩盤反応系を対象としたコードの機能確認, 日本原子力学会2026年秋の大会, Sept. 2026.  公式リンク  
  
• 西原尚宏, 中瀬正彦, 岡村知拓, 前村庸之, 佐藤久夫. オールジャパンで取り組む新しいオープンソース地球化学解析コードJPHASTの開発(2) AI統合型システム開発と将来展望：多様なコードを統合可能な解析プラットフォームの実現, 日本原子力学会2026年秋の大会, Sept. 2026.  公式リンク  
  
• 中瀬正彦, 西原尚宏, 前村庸之, 岡村知拓, 佐藤久夫. オールジャパンで取り組む新しいオープンソース地球化学解析コードJPHASTの開発(1) 機能と開発目標、コミュニティ形成に向けて, 日本原子力学会2026年秋の大会, Sept. 2026.  公式リンク  
  
• 竹下健二, 岡村知拓, 中瀬正彦. 原子燃料の安定供給に必要な核燃料サイクルフロントエンドのプロセス構成, 日本原子力学会2026年秋の大会, Sept. 2026.  公式リンク  
  
• Ahid Nurmanjaya, Qiushi Wang, Martin DUARTE, Ryota Nakazawa, 塚本泰介, Takashi Shimada, Toru Kobayashi, Tomoo Yamamura, Masahiko Nakase. Investigation on Fuel Cycle based on Actinide Management Towards Sustainable Use of Nuclear Energy(25) Applicability of Short-Chain Amide Extractant in Fluorinated Solvents for Multielement Separation, Atomic Energy Society of Japan 2026 Autumn Meeting, Sept. 2026.  公式リンク  
  
• 岡村知拓, 島田隆, 中瀬正彦, 伴康俊, 山村朝雄. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(27) 高速炉サイクル移行期におけるプルトニウムマネジメント研究, 日本原子力学会2026年秋の大会, Sept. 2026.  公式リンク  
  
• 島田隆, 岡村知拓, 中瀬正彦, 竹下健二, 小西裕貴, 塚本裕貴, 伴康俊, 山村朝雄. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(26) 高速炉が燃料サイクル持続性、柔軟性に与える影響と課題, 日本原子力学会2026年秋の大会, Sept. 2026.  公式リンク  
  
• 中沢亮太, Jessey De Roeck, 中瀬正彦. スパークプラズマ焼結法によるU含有シンロックの作製と相状態の評価, 日本原子力学会2026年秋の大会, Sept. 2026.  公式リンク  
  
• 中沢亮太, 中瀬正彦. An含有シンロックの相状態に及ぼすスパークプラズマ焼結法の影響, 東北大学金属材料研究所 大洗・アルファ合同研究会, Aug. 2026.
• Ayoob Ilyas, Masahiko Nakase, Andika Putra Dwijayanto, Alessio Rossi, Hidetoshi Okada, Chris Allison, Zheng Fu, Shuying Jiang. Conceptual Design of a Compact Heat Pipe Device for Lunar Surface Power Generation, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Andika Putra Dwijayanto, Kenji Nishihara, Tomohiro Okamura, Masahiko Nakase. The Case for Pu-fuelled Molten Chloride Fast Reactor for Nuclear Marine Propulsion, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Andika Putra Dwijayanto, Tomohiro Okamura, Masahiko Nakase. Online or Offline? Evaluating the Refuelling Options for Marine Molten Chloride Fast Reactor, The 19th Student Research Presentation on AESJ Kanto-Koetsu Office, Mar. 2026.
• Ayoob Ilyas, Masahiko Nakase, Andika Putra Dwijayanto, Alessio Rossi, Hide Okada, Chris Allison, Zheng Fu, Shuying Jiang. Neutronic Design of a Compact Heat-Pipe Microreactor with Preliminary Thermal Evaluation for Lunar Application, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Alessio Rossi, Masahiko Nakase, Tomohiro Okamura, Kenji Nishihara, Kouki Ono. A World Model of the Nuclear Fuel Cycle From Past Reconstruction to Future Assessment of Fuel Demand, Waste Treatment and Strategic Stability, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Alessio Rossi, Masahiko Nakase, Tomohiro Okamura, Kenji Nishihara, Kouki ONO. Towards a World Model of the Nuclear Fuel CycleFrom Past Reconstruction to Future Assessment of Fuel Demand, Waste Treatment and Strategic Stability, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Alessio Rossi, Masahiko Nakase, Tomohiro Okamura, Kenji Nishihara, Kouki ONO. Towards the World-Wide Modelling of the Nuclear Fuel Cycle, The 19th Student Research Presentation on AESJ Kanto-Koetsu Office, Mar. 2026.
• Ahid Nurmanjaya, Qiushi Wang, Taisuke Tsukamoto, Takashi Shimada, Tomoo Yamamura, Masahiko Nakase. Extraction behavior of Short-Chain Ligands for f-Block Elements in Novel Fluorinated Diluents, The 19th Student Research Presentation on AESJ Kanto-Koetsu Office, Mar. 2026.
• Qiushi Wang, Ahid Nurmanjaya, Masahiko Nakase. Structure–Extraction Relationship of Aromatic-Substituted TDGA Derivatives for Pd(II) in Nitric Acid Media, The 19th Student Research Presentation on AESJ Kanto-Koetsu Office, Mar. 2026.
• Masahiko Nakase. AI-Enabled Digital Twins for Nuclear Science and Engineering Studies, The 10th, Year 2025 ZC Colloquium, Workshop of faculties of MIT and Laboratory for Zero-Carbon Energy, Mar. 2026.
• Joonho LEE, Takahiro Nishihara, Masahiko Nakase. Extractant Exploration for Actinide Separation Solubility-Performance Hybrid Evaluation for ML Based Extractant Reverse Design, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• Qiushi Wang, Ahid Nurmanjaya, Masahiko Nakase. Aryl-Substituent Effects in Thiodiglycolamide Ligands: Alkyl Chain Length Modification for Enhanced Palladium(II) Extraction, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• 島田 隆, 岡村知拓, 中瀬正彦, 竹下健二, 西村佳祐, 小西裕貴, 塚本裕貴, 日比宏基, 森脇裕之, 山村朝雄. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(23)軽水炉サイクルの課題解決の視点からの高速炉サイクルの要件１, 日本原子力学会2026年春の年会, Mar. 2026.
• 岡村知拓, 中瀬正彦, 島田 隆, 塚本 裕貴, 小西裕貴, 西村佳祐, 山村朝雄. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(22)高速炉実証炉の諸量評価研究, 日本原子力学会2026年春の年会, Mar. 2026.
• 塚本泰介, 折野 匡, 西村佳祐, 小西裕貴, 塚本裕貴, 島田 隆, 中瀬正彦, 伴 康俊, 津幡靖宏, 山村朝雄. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(20)二次廃棄物量低減に向けたMA暫定保管体への直接転換技術の開発, 日本原子力学会2026年春の年会, Mar. 2026.
• Ahid Nurmanjaya, Qiushi Wang, Taisuke Tsukamoto, Takashi Shimada, Tomoo Yamamura, Masahiko Nakase. Investigation on fuel cycle based on actinide management towards sustainable use of nuclear energy(17) Investigation of elemental separation behavior using novel fluorinated solvents and short-chain extractants, Atomic Energy Society of Japan 2026 Spring Annual Meeting, Mar. 2026.
• 西原尚宏, 岡村知拓, 朝野英一, 中瀬正彦. TASKI:AIを基盤とした原子力ナレッジマネジメントシステム(5)非構造データのナレッジベース化, 日本原子力学会2026年春の年会, Mar. 2026.
• 岡村知拓, 中瀬正彦. 事例紹介1, 東京科学大学教育革新センター主催 教育革新シンポジウム2026, Feb. 2026.
• 中瀬正彦. [招待講演] 核燃料サイクルと資源循環：核種分離がもたらす原子力の新しい価値と未来－廃棄物処分負荷低減と資源有効利用に向けて－, 廃棄物資源循環学会関東支部研究発表会, Feb. 2026.
• 島田 隆, 岡村知拓, 中瀬正彦, 竹下健二, 小西裕貴, 西村佳祐, 塚本裕貴, 山村朝雄. アクチノイドマネジメントを備えた燃料サイクルの研究(1)MA分離・暫定保管の有効性評価, 日本原子力学会 第19回再処理・リサイクル部会セミナー, Jan. 2026.

その他の論文・著書など

• 中瀬正彦, 岡村知拓, 西原尚宏. TWoFCS2026/NuMBAC2026サマリーレポート, TWoFCS2026/NuMBAC2026サマリーレポート, Apr. 2026.  公式リンク  
  

特許など

• 中瀬正彦, 針貝　美樹, 社外発明者, 社外発明者, 社外発明者, 社外発明者. 高レベル放射性物質処理システム及び高レベル放射性物質処理方法. 特許. 登録. 国立大学法人東京科学大学, 三菱重工業株式会社. 2021/05/31. 特願2021-090800. 2022/12/13. 特開2022-183462. 特許第7850975号. 2026/04/16 2026.

研究ハイライト

• Masahiko Nakase, Packwood Daniel. Organizer, Group Discussion 4: "How to be both flexible and deep with your research?" in Japan Society for the Promotion of Science 17th HOPE Meeting with Nobel Laureates (International Conference organized by JSPS). 2026～2026.
• 中瀬正彦, 岡村知拓, 竹下健二, 西原健司, 阿部拓海. 第7回核燃料サイクルシミュレーションワークショップ TWoFCS2026 & NuMBAC2026 オーガナイザー. 2026～2026.

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