The in-situ separation of tritium oxide by the vibrationally-selective excitation

• Project/Area Number: 26620017
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical chemistry
• Research Institution: Nihon University
• Principal Investigator: OKUYAMA Katsuhiko 日本大学, 工学部, 教授 (10185556)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 三重水素水 / in-situ分離 / 振動準位選択的励起 / 優先的蒸留 / 重水 / 非対称伸縮振動 / Nd:YAGレーザー基本波 / 汚染水 / 三重水素 / 振動励起 / 沸点挙動 / 赤外光照射 / Nd:YAGレーザー / 微量β線計測 / トリチウム / 三重水素水TDO / 赤外レーザー照射 / 伸縮振動選択励起 / 赤外分光 / 湿式法 / in-situ測定 / トリチウム水 / β線検出 / 蒸発法 / レーザーイオン化高分解能質量選別法 / 界面振動数 / 対称伸縮振動 / 赤外レーザー励起 / 振動選択 / 逆対象伸縮振動 / 対称変角振動

Outline of Final Research Achievements

In order to propose the possibility of the in-situ separation of tritium oxide from a large amount of the polluted water used with the emergency treatment for preventing from inflicting further damage on the nuclear-power-supply accident, we carried out study on the distillation of water including a small amount of tritium oxide under the irradiation of Nd-YAG laser. Because the frequency of the laser is of 9397 cm-1 that is close to the asymmetric stretching level (0,0,4) of tritium oxide ; 9332 cm-1, we think that the selected excitation induces to the preferential distillation of tritium oxide. Before the distillation the 10 mL-sample indicated the averaged value of 50 ± 30 Bq. The distillate samples at 98.1℃ and 101.8℃ were showed 50 ± 44 Bq and 51 ± 38 Bq, respectively. From the results, we conclude no contribution of the infrared-irradiation on the preferential distillation of tritium oxide.

Research Products

• [Journal Article] Observation of evidence for the pi*-sigma*hyperconjyugation in the S1 state of o-, m-, and p-fluorotolunes by double resonance infrared spectroscopy (2016)
  • Author(s): Takashi Chiba, Katsuhiko Okuyama, Asuka Fujii
  • Journal Title: The Journal of Physical Chemistry A Volume: 120 Issue: 28 Pages: 5573-5580
  • DOI: 10.1021/acs.jpca.6b05171
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Radiocesium inventory on the campus of Nihon University, Koriyama, Fukushima, Japan (2015)
  • Author(s): Naofumi Akata1, Katsuhiko Okuyama*, Yuri Tsujimoto, Natsu Takahashi, Mai Ishihara, Yusuke Arai, Takaki Itakura, Takatoshi Sato, Taiki Ogata and Hideki Kakiuchi
  • Journal Title: Radiation Emergency Medicine Volume: 4 Pages: 57-61
  • NAID: 40020370802
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Radiocesium Inventory on the Campus of Nihon University, Koriyama, Fukushima, Japan (2015)
  • Author(s): Naofumi, Akata, Katsuhiko Okuyama, Yuri Tsujimoto, Natsu Takahashi, Mai Ishihara, Yusuke Arai, Takaki Itakura, Takatoshi Sato, Taiki Ogata, Hideki Kakiuchi
  • Journal Title: Radiation Emergency Medicine Volume: 4 Pages: 57-61
  • NAID: 40020370802
  • Peer Reviewed
• [Presentation] The quantitative detection of very-small-amount tritium oxide TDO in commercial available deuterium oxide D2O (2017)
  • Author(s): Ryosuke Kanasawa, Shuhei Ohtake, Hiroki Daita, Osamu Yamamoto, and Katsuhiko Okuyama
  • Organizer: Joint Meeting of the Tohoku Area Chemistry Societies
• [Presentation] 日本大学郡山キャンパス内における放射性セシウム蓄積量と深度分布. (2015)
  • Author(s): 渡部夏菜、赤田尚史、渡邉瑞左、柿内秀樹、奥山克彦
  • Organizer: 国際シンポジウム「福島の復興へ向けての放射線対策に関するこれからの課題」
  • Place of Presentation: 福島市 パルセいいざか
  • Year and Date: 2015-05-30 – 2015-05-31
• [Presentation] Inventory and depth profile of radiocesium in the campus of Nihon University, Koriyama, Japan (2015)
  • Author(s): Kana WATANABE1, Naofumi AKATA*, Mizusa WATANABE, Hideki KAKIUCHI, Katsuhiko OKUYAMA
  • Organizer: 国際シンポジウム「福島の復興へ向けての放射線対策に関するこれからの課題」
  • Place of Presentation: パルセ飯坂
  • Year and Date: 2015-05-30
  • Int'l Joint Research