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.
|出版ステータス||Published - 2020|
|イベント||16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019 - Taipei, Taiwan, Province of China|
継続期間: 2019 10 14 → 2019 10 18
|Conference||16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019|
|国/地域||Taiwan, Province of China|
|Period||19/10/14 → 19/10/18|
ASJC Scopus subject areas