Japan Geoscience Union Meeting 2021

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[J] Oral

H (Human Geosciences ) » H-CG Complex & General

[H-CG27] Nuclear Power and Geoscience in Japan: 10 years after the 3.11 complex disaster

Sat. Jun 5, 2021 3:30 PM - 5:00 PM Ch.17 (Zoom Room 17)

convener:Daisuke Suetsugu(institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology), Kohta Juraku(Department of Humanities, Social and Health Sciences, School of Engineering, Tokyo Denki University), Satoshi Kaneshima(Department of Earth and Planetary Sciences, Kyushu University), Takeshi Sagiya(Disaster Mitigation Research Center, Nagoya University), Chairperson:Daisuke Suetsugu(institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology), Takeshi Sagiya(Disaster Mitigation Research Center, Nagoya University)

4:15 PM - 4:30 PM

[HCG27-04] Scientific characteristics of high-level nuclear waste disposal site -Geological perspective at Suttsu and Kamoenai areas, Hokkaido -

★Invited Papers

*Satoshi Okamura1 (1.Hokkaido Education University)

Keywords:Scientific Characteristic Map, High-level nuclear waste, final repository, hyaloclastite

The “Scientific Characteristic Map” was published in 2017 to indicate selection site for high-level nuclear waste final repository in Japan. In 2020, based on the proposals from two municipalities, Suttsu and Kamoenai in Hokkaido, a literature search, which is the first stage of the selection of the disposal site survey, was started. The two municipalities have suitable sites for the final repository after the “Scientific Characteristic Map”. The geological characteristics of both areas, however, indicate definitely non suitability for the final depository. The two areas are characterized by Middle to Late Miocene volcanic rocks, such as pillow lava, hyaloclastite, feeder dyke, and reworked volcaniclastic rocks. The mode of occurrence has very heterogeneous and concealed cracks and fractures. The Suttsu area is situated at northern part of the active fault, the Kuromatsunai Lowland active faults. It may be impossible to judge the suitability as a disposal site in Japan from the recent scientific point of view.