SPRAYED CLAY TECHNOLOGY FOR THE DEEP REPOSITORY OF HIGH-LEVEL RADIOACTIVE WASTE
The sealing barrier will play very important role in the Czech disposal concept of high level radioactive waste. It follows Swedish SKB3 design where granitic rock environment will host the repository. Swelling clay based materials as the most favorable for sealing purposes were selected. Such clays...
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| Format: | Article |
| Language: | English |
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University of Zagreb
2012-07-01
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| Series: | Rudarsko-geološko-naftni Zbornik |
| Subjects: | |
| Online Access: | http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=158815&lang=en |
| _version_ | 1827163112484110336 |
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| author | Lucie Hausmannová Radek Vašíček Jiří Šťástka |
| author_facet | Lucie Hausmannová Radek Vašíček Jiří Šťástka |
| author_sort | Lucie Hausmannová |
| collection | DOAJ |
| description | The sealing barrier will play very important role in the Czech disposal concept of high level radioactive waste. It follows Swedish SKB3 design where granitic rock environment will host the repository. Swelling clay based materials as the most favorable for sealing purposes were selected. Such clays must fulfill certain requirements (e.g. on swelling properties, hydraulic conductivity or plasticity) and must be stable for thousands of years. Better sealing behavior is obtained when the clay is compacted. Technology of the seal construction can vary according to its target dry density. Very high dry density is needed for buffer (sealing around entire canister with radioactive waste). Less strict requirements are on material backfilling the access galleries. It allows compaction to lower dry density than in case of buffer. One of potential technology for backfilling is to compact clay layers in most of the gallery profile by common compaction machines (rollers etc.) and to spray clay into the uppermost part afterwards. The paper introduces the research works on sprayed clay technology performed at the Centre of Experimental Geotechnics of the Czech Technical University in Prague. Large scale in situ demonstration of filling of short drift in the Josef Gallery is also mentioned. |
| first_indexed | 2024-03-12T06:19:28Z |
| format | Article |
| id | doaj.art-24e9f9898ce04532a9b16be9a7ee9eb0 |
| institution | Directory Open Access Journal |
| issn | 0353-4529 1849-0409 |
| language | English |
| last_indexed | 2025-03-21T00:55:32Z |
| publishDate | 2012-07-01 |
| publisher | University of Zagreb |
| record_format | Article |
| series | Rudarsko-geološko-naftni Zbornik |
| spelling | doaj.art-24e9f9898ce04532a9b16be9a7ee9eb02024-08-03T04:51:27ZengUniversity of ZagrebRudarsko-geološko-naftni Zbornik0353-45291849-04092012-07-012412933SPRAYED CLAY TECHNOLOGY FOR THE DEEP REPOSITORY OF HIGH-LEVEL RADIOACTIVE WASTELucie Hausmannová 0Radek Vašíček1Jiří Šťástka 2Centre of Experimental Geotechnics, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech RepublicCentre of Experimental Geotechnics, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech RepublicCentre of Experimental Geotechnics, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech RepublicThe sealing barrier will play very important role in the Czech disposal concept of high level radioactive waste. It follows Swedish SKB3 design where granitic rock environment will host the repository. Swelling clay based materials as the most favorable for sealing purposes were selected. Such clays must fulfill certain requirements (e.g. on swelling properties, hydraulic conductivity or plasticity) and must be stable for thousands of years. Better sealing behavior is obtained when the clay is compacted. Technology of the seal construction can vary according to its target dry density. Very high dry density is needed for buffer (sealing around entire canister with radioactive waste). Less strict requirements are on material backfilling the access galleries. It allows compaction to lower dry density than in case of buffer. One of potential technology for backfilling is to compact clay layers in most of the gallery profile by common compaction machines (rollers etc.) and to spray clay into the uppermost part afterwards. The paper introduces the research works on sprayed clay technology performed at the Centre of Experimental Geotechnics of the Czech Technical University in Prague. Large scale in situ demonstration of filling of short drift in the Josef Gallery is also mentioned.http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=158815&lang=enbentonitebackfillsprayed clay technology |
| spellingShingle | Lucie Hausmannová Radek Vašíček Jiří Šťástka SPRAYED CLAY TECHNOLOGY FOR THE DEEP REPOSITORY OF HIGH-LEVEL RADIOACTIVE WASTE Rudarsko-geološko-naftni Zbornik bentonite backfill sprayed clay technology |
| title | SPRAYED CLAY TECHNOLOGY FOR THE DEEP REPOSITORY OF HIGH-LEVEL RADIOACTIVE WASTE |
| title_full | SPRAYED CLAY TECHNOLOGY FOR THE DEEP REPOSITORY OF HIGH-LEVEL RADIOACTIVE WASTE |
| title_fullStr | SPRAYED CLAY TECHNOLOGY FOR THE DEEP REPOSITORY OF HIGH-LEVEL RADIOACTIVE WASTE |
| title_full_unstemmed | SPRAYED CLAY TECHNOLOGY FOR THE DEEP REPOSITORY OF HIGH-LEVEL RADIOACTIVE WASTE |
| title_short | SPRAYED CLAY TECHNOLOGY FOR THE DEEP REPOSITORY OF HIGH-LEVEL RADIOACTIVE WASTE |
| title_sort | sprayed clay technology for the deep repository of high level radioactive waste |
| topic | bentonite backfill sprayed clay technology |
| url | http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=158815&lang=en |
| work_keys_str_mv | AT luciehausmannova sprayedclaytechnologyforthedeeprepositoryofhighlevelradioactivewaste AT radekvasicek sprayedclaytechnologyforthedeeprepositoryofhighlevelradioactivewaste AT jiristastka sprayedclaytechnologyforthedeeprepositoryofhighlevelradioactivewaste |