Behavior of natural radionuclides in high saline undergroundwaters from the deep wells

2012 Fiscal Year Final Research Report

• Project/Area Number: 22510057
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Risk sciences of radiation/Chemicals
• Research Institution: Kanazawa University
• Principal Investigator: YAMAMOTO Masayoshi 金沢大学, 環日本海域環境研究センター, 教授 (10121295)
• Project Period (FY): 2010 – 2012
• Keywords: 天然放射性核種 / 大深度温鉱泉 / 高塩分地下 / ラジウム / ウラン

Research Abstract

Radium isotopes (226Ra and 228Ra) were measured for Na-Cl type groundwater samples collected from Hokkaido, Aomori, Akita and Yamagata Prefectures in Japan. The 226Ra contents varied in the wide range from 9 - 5000 mBq kg-1and their values were roughly correlated to the total dissolved solid (TDS). Activity ratios of 228Ra/226Ra in groundwater ranged from 0.3- 4.2 and most of them clustered around those of 232Th/238U of common rocks in Japan. These observations agreed well with the previous results from Ishikawa, Toyama and Niigata Prefectures, and, overall, indicated that Ra was mainly transported into the groundwater by α-recoil process and its concentration in groundwater was constrained by adsorption-desorption reaction depending on salinity.

Research Products

• [Journal Article] Radium geochemistry I Na-Cl groundwater in Niigata Prefecture, Japan (2010)
  • Author(s): Tomita,J., Satake, H., Fukuyama, T., Sasaki, K., Sakaguchi, A., Yamamoto, M
  • Journal Title: J. Environmental Radioactivity Volume: 101 Pages: 201-210
  • DOI: DOI:10.1016/j.quaint.2010.02.007
  • Peer Reviewed
• [Journal Article] Uranium in acidic mine drainage at the former Ogoya Mine in Ishikawa Prefecture of Japan (2010)
  • Author(s): Yamamoto, M., Sakaguchi, A.,Kofuji, H
  • Journal Title: J. Radioanal. Nucl. Chem Volume: 283 Pages: 699-705
  • Peer Reviewed
• [Presentation] 高塩分温鉱泉中のラジウム同位体の挙動 (2012)
  • Author(s): 高田貴裕、山本政儀、長尾誠也、玉村修一、佐々木圭一、張 勁、秋田藤夫
  • Organizer: 第65回温泉科学会
  • Place of Presentation: 登別温泉、北海道
  • Year and Date: 20120926-29
• [Presentation] 高塩分温鉱泉のラジウム同位体 (2011)
  • Author(s): 高田貴裕、山本政儀、富田純平、長尾誠也、玉村修一、富田純平、張 勁、秋田藤夫
  • Organizer: 第53回放射化学討論会
  • Place of Presentation: 長野
  • Year and Date: 20110920-22
• [Presentation] 高塩分温鉱泉のラジウム同位体-北海道西部の大深度掘削泉を中心に (2011)
  • Author(s): 高田貴裕、山本政儀、長尾誠也、玉村修一、張 勁、秋田藤夫
  • Organizer: 第64回温泉科学会
  • Place of Presentation: 有馬温泉
  • Year and Date: 20110907-09
• [Presentation] Ra-226の粘土鉱物粒子に対する吸着量の塩濃度依存性 (2010)
  • Author(s): 玉村修司、高田貴裕、長尾誠也、山本政儀
  • Organizer: 日本鉱物科学会2010年年会・総会
  • Place of Presentation: 島根大学
  • Year and Date: 20100923-25
• [Book] Radium isotopes in Na-Cl type groundwater from the Japan Sea side of Japan, Central Japan、Proceedings of the International Workshop on Low Level Measurements and its Application to Earth and Environmental Sciences (Edts. Yamamoto, M., et al.) (2010)
  • Author(s): Tomita, J., Fukuyama. T., Sakaguchi, A., Nagao, S., Yamamoto, M
  • Total Pages: 185-190