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

Ema Yoshikawa, H. Komine, S. Goto

Research output: Contribution to conferencePaperpeer-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 languageEnglish
Publication statusPublished - 2020
Event16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019 - Taipei, Taiwan, Province of China
Duration: 2019 Oct 142019 Oct 18

Conference

Conference16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019
CountryTaiwan, Province of China
CityTaipei
Period19/10/1419/10/18

Keywords

  • Hydraulic conductivity
  • Radiation
  • Slurry

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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