Evaluation of properties of soil-based filling material for radiation shielding and water sealing

Ema Yoshikawa; H. Komine; S. Goto

Evaluation of properties of soil-based filling material for radiation shielding and water sealing

Ema Yoshikawa, H. Komine, S. Goto

School of Creative Science and Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

The 2011 off the Pacific coast of Tohoku earthquake affected Japan, causing severe damage to the Fukushima Daiichi Nuclear Power Station (1F). To decommission 1F reliably, it is necessary to protect workers from radiation exposure and to prevent leakage of contaminated water into the damaged nuclear buildings. The use of a filling type soil material, super heavy bentonite slurry (SHBS), which consists of sodium-bentonite slurry with barite powder, has been examined for water sealing with radiation shielding capabilities. In this study, radiation shielding capabilities test and falling head permeability test were done. This study proved that SHBS has superb performance as a filling-type water stopping material intended for radiation shielding during NPS decommissioning because it has greater gamma ray shielding capability and almost identical neutron beam shielding capability to that of tap water.

Original language	English
Publication status	Published - 2020
Event	16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019 - Taipei, Taiwan, Province of China Duration: 2019 Oct 14 → 2019 Oct 18

Conference

Conference	16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019
Country/Territory	Taiwan, Province of China
City	Taipei
Period	19/10/14 → 19/10/18

Keywords

Hydraulic conductivity
Radiation
Slurry

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology

Cite this

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title = "Evaluation of properties of soil-based filling material for radiation shielding and water sealing",

abstract = "The 2011 off the Pacific coast of Tohoku earthquake affected Japan, causing severe damage to the Fukushima Daiichi Nuclear Power Station (1F). To decommission 1F reliably, it is necessary to protect workers from radiation exposure and to prevent leakage of contaminated water into the damaged nuclear buildings. The use of a filling type soil material, super heavy bentonite slurry (SHBS), which consists of sodium-bentonite slurry with barite powder, has been examined for water sealing with radiation shielding capabilities. In this study, radiation shielding capabilities test and falling head permeability test were done. This study proved that SHBS has superb performance as a filling-type water stopping material intended for radiation shielding during NPS decommissioning because it has greater gamma ray shielding capability and almost identical neutron beam shielding capability to that of tap water.",

keywords = "Hydraulic conductivity, Radiation, Slurry",

author = "Ema Yoshikawa and H. Komine and S. Goto",

note = "Funding Information: This research was conducted with support from {\textquoteleft}Human Resource Development and Research Program for Decommissioning of Fukushima Daiichi Nuclear Power Station{\textquoteright} by the Japan Ministry of Education, Culture, Sports, Science and Technology. Publisher Copyright: Copyright {\textcopyright} Soil Mechanics and Geotechnical Engineering, ARC 2019.All rights reserved.; 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019 ; Conference date: 14-10-2019 Through 18-10-2019",

year = "2020",

language = "English",

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T1 - Evaluation of properties of soil-based filling material for radiation shielding and water sealing

AU - Yoshikawa, Ema

AU - Komine, H.

AU - Goto, S.

N1 - Funding Information: This research was conducted with support from ‘Human Resource Development and Research Program for Decommissioning of Fukushima Daiichi Nuclear Power Station’ by the Japan Ministry of Education, Culture, Sports, Science and Technology. Publisher Copyright: Copyright © Soil Mechanics and Geotechnical Engineering, ARC 2019.All rights reserved.

PY - 2020

Y1 - 2020

N2 - The 2011 off the Pacific coast of Tohoku earthquake affected Japan, causing severe damage to the Fukushima Daiichi Nuclear Power Station (1F). To decommission 1F reliably, it is necessary to protect workers from radiation exposure and to prevent leakage of contaminated water into the damaged nuclear buildings. The use of a filling type soil material, super heavy bentonite slurry (SHBS), which consists of sodium-bentonite slurry with barite powder, has been examined for water sealing with radiation shielding capabilities. In this study, radiation shielding capabilities test and falling head permeability test were done. This study proved that SHBS has superb performance as a filling-type water stopping material intended for radiation shielding during NPS decommissioning because it has greater gamma ray shielding capability and almost identical neutron beam shielding capability to that of tap water.

AB - The 2011 off the Pacific coast of Tohoku earthquake affected Japan, causing severe damage to the Fukushima Daiichi Nuclear Power Station (1F). To decommission 1F reliably, it is necessary to protect workers from radiation exposure and to prevent leakage of contaminated water into the damaged nuclear buildings. The use of a filling type soil material, super heavy bentonite slurry (SHBS), which consists of sodium-bentonite slurry with barite powder, has been examined for water sealing with radiation shielding capabilities. In this study, radiation shielding capabilities test and falling head permeability test were done. This study proved that SHBS has superb performance as a filling-type water stopping material intended for radiation shielding during NPS decommissioning because it has greater gamma ray shielding capability and almost identical neutron beam shielding capability to that of tap water.

KW - Hydraulic conductivity

KW - Radiation

KW - Slurry

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M3 - Paper

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T2 - 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019

Y2 - 14 October 2019 through 18 October 2019

ER -

Evaluation of properties of soil-based filling material for radiation shielding and water sealing

Abstract

Conference

Keywords

ASJC Scopus subject areas

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