Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-29T10:30:07.062Z Has data issue: false hasContentIssue false
  • English
  • Français

Evaluation for Influence of New Volcanic Eruption on Geological Disposal Site

Published online by Cambridge University Press:  16 February 2017

Taro Shimada ,
Seiji Takeda ,
Ryutaro Sakai ,
Kazuya Takubo  and
Tadao Tanaka
Taro Shimada*
Affiliation:
Nuclear Safety Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Ibaraki, 3191195, JAPAN.
Seiji Takeda
Affiliation:
Nuclear Safety Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Ibaraki, 3191195, JAPAN.
Ryutaro Sakai
Affiliation:
OYO Corporation, 1-66-2 Miyahara, Kita-ku, Saitama City, Saitama, 3310812, JAPAN
Kazuya Takubo
Affiliation:
Nuclear Safety Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Ibaraki, 3191195, JAPAN.
Tadao Tanaka
Affiliation:
Nuclear Safety Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Ibaraki, 3191195, JAPAN.
*
*(Email: shimada.taro@jaea.go.jp)
Get access

Abstract

There are some regions where it is difficult to exclude the possibility of appearance of new volcanic activity on the site even if the geological disposal site is located far from existing volcanos in Japan. In order to identify the influence of volcanic eruption at the site to the public if it occurs, public exposure doses were evaluated based on the two scenarios considering types of eruption at new volcanic activity in Japan. One is the exposure by volcanic ash widespread by Strombolian eruption and deposited on the ground surface, including radionuclides from vitrified waste forms after a volcanic conduit penetrated the repository. The other is that by waste forms appeared at the ground surface by Merapi type pyroclastic flow. Exposure doses of the residents living on the volcanic ash do not exceed 1mSv/y even when the eruption occurs at 1,000 years after closure of disposal site. Exposure dose rate for the volcanic researchers temporarily approaching naked waste forms without realizing radioactive wastes is 0.8mSv/h when the eruption occurs 100,000 years after. It indicated that attention should be paid to the influence by Merapi type pyroclastic flow on researchers approaching waste forms appeared rather than that by Strombolian eruption on residents living on the volcanic ash widespread.

Keywords

radiation effectenvironmentwaste management
Type
Articles
Information
MRS Advances , Volume 1 , Issue 61: Scientific Basis for Nuclear Waste Management XXXIX , 2016 , pp. 4081 - 4086
Copyright
Copyright © Materials Research Society 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

JNC: H12: Project to Establish Scientific and Technical Basis for HLW Disposal in Japan, JNC TN1410 2000-004, April (2000).Google Scholar
Takeuchi, A., The neotectonics of the Japanese Islands and the tectonic provinces, Chikyu Monthly, 21(9) pp. 537–542, (1999). [in Japanese English abstract]Google Scholar
Miyagi, I., Stratigraphy and volcanic activities of Hijiori volcano, Northeastern Japan arc, Bull. Volcanol. Soc. Japan, 52(6) pp. 311–333, (2007). [in Japanese with English abstract]Google Scholar
Marsh, D., Coleman, N., Magma flow and interaction with waste packages in a geologic repository at Yucca Mountain, Nevada, J. Volcanol. Geotherm. Res. 182 pp. 76–96 (2009).CrossRefGoogle Scholar
Takeda, S. et. al., Assessment on Long-term Safety for Geological Disposal of High Level Radioactive Waste, JAEA-Research 2009-034, (2009). [in Japanese with English abstract]Google Scholar
Suzuki, T., A Theoretical Model for Dispersion of Tephra, Arc Volcanism: Physics and Tectonics, pp.95–113, (1983).Google Scholar
Japan Meteorological Agency, Volcanic warnings, http://www.jma.go.jp/en/volcano/ (accessed on November 12, 2015)Google Scholar