Crack Formation in Cementitious Materials Used for an Engineering Barrier System and Their Impact on Hydraulic Conductivity from the Viewpoint of Performance Assessment of a TRU Waste Disposal System
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- HIRANO Fumio
- Japan Atomic Energy Agency
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- OTANI Yoshiteru
- Civil Engineering Design Division, Kajima Corporation
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- KYOKAWA Hiroyuki
- Civil Engineering Design Division, Kajima Corporation
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- MIHARA Morihiro
- Japan Atomic Energy Agency
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- SHIMIZU Hiroyuki
- Institute of Fluid Science, Tohoku University
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- HONDA Akira
- Japan Atomic Energy Agency
Bibliographic Information
- Other Title
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- TRU廃棄物処分システムの性能評価の観点からの人工バリアの透水性に対するセメント系材料のひび割れの影響に関する検討
- TRU ハイキブツ ショブン システム ノ セイノウ ヒョウカ ノ カンテン カラ ノ ジンコウ バリア ノ トウスイセイ ニ タイスル セメントケイ ザイリョウ ノ ヒビワレ ノ エイキョウ ニ カンスル ケントウ
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Description
The mechanical analysis code MACBECE2014 has been developed at the Japan Atomic Energy Agency (JAEA) to make realistic simulations of the physical integrity of the near field for performance assessment of the geological disposal of TRU waste in Japan. The MACBECE2014 code can be used to evaluate long-term changes in the mechanical behavior of the near field and any subsequent changes in the permeability of engineering barrier components, including crack formation in cementitious materials caused by expansion due to metal corrosion. Cracks in cementitious materials are likely to channel the flow of groundwater and so the represent preferred flow paths of any released radionuclides. Mechanical analysis was conducted using the MACBECE2014 code to investigate the concept of the TRU waste disposal system described in JAEA’s Second Progress TRU Report. Simulated results of a disposal system with a bentonite buffer demonstrated that the low permeability of the engineering barrier system could be maintained for long time periods because the physical integrity of the bentonite buffer remained intact even if cracks in the cementitious components had formed locally. Simulated results of the disposal system with a concrete backfill instead of a bentonite buffer showed that crack formation leads to a significant increase in the permeability of the engineering barrier system.
Journal
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- Transactions of the Atomic Energy Society of Japan
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Transactions of the Atomic Energy Society of Japan 15 (2), 97-114, 2015
Atomic Energy Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001205186731392
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- NII Article ID
- 130005151362
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- NII Book ID
- AA11643165
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- ISSN
- 21862931
- 13472879
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- NDL BIB ID
- 027441659
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed