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ID:33509389
大小:308.21 KB
页数:7页
时间:2019-02-26
《中国高放废物处置库缓冲材料物理性能》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第25卷第4期岩石力学与工程学报Vol.25No.42006年4月ChineseJournalofRockMechanicsandEngineeringApril,2006PHYSICALPROPERTYOFCHINA′SBUFFERMATERIALFORHIGH-LEVELRADIOACTIVEWASTEREPOSITORIESWENZhijian(BeijingResearchInstituteofUraniumGeology,ChinaNationalNuclearCorporation,Beijing1000
2、29,China)Abstract:Thedeepgeologicaldisposalisregardedasthemostreasonableandeffectivewaytosafelydisposehigh-levelradioactivewastes(HLW)intheworld.TheconceptualmodelofHLWgeologicaldisposalinChinaisbasedonamulti-barriersystemthatcombinesanisolatinggeologicalenviro
3、nmentwithanengineeredbarriersystemincludingthevitrifiedHLW,canister,overpackandbuffer/backfillmaterial.Thebentoniteisselectedasbasematerialofthebuffer/backfillmaterialinHLWrepositories,duetotheverylowpermeabilityandexcellentretardationofnuclidesfrommigration,et
4、c.GMZdepositisselectedasthecandidatesupplierforbuffermaterialofHLWrepositoriesinChina.Since2000,systematicstudywasconductedonGMZ–1thatisNa-bentoniteproducedfromGMZdepositandselectedasreferencematerialforChinesebuffermaterialstudy.Themineralcomposition,basicpara
5、metersofGMZ–1bentoniteandthermalconductivity,hydraulicconductivity,unconfinedcompressionstrengthasfunctionofdrydensityandwatercontentarepresented.TheswellingstressofGMZ–1bentoniteasfunctionofdrydensityisalsoreported.GMZ–1bentoniteischaracterizedbyhighcontentofm
6、ontmorillonite(about75%)andlessimpurities.Theadequacyunderstandingofpropertyandlong-termbehaviorindeepgeologicalconditionofGMZ–1isessentialtosafedisposethehigh-levelradioactivewastesinChina.Keywords:high-levelradioactivewastesdisposal;GMZ–1;buffermaterial;physi
7、calproperties+CLCnumber:TL942.21Documentcode:AArticleID:1000–6915(2006)04–0794–07中国高放废物处置库缓冲材料物理性能温志坚(核工业北京地质研究院,北京100029)摘要:深地质处置被国际上公认为处置高放废物的最有效可行的方法。中国深地质处置的概念模型采用多重工程屏障系统(包括废物固化体、废物容器、外包装、缓冲/回填材料)和适宜的地质围岩地质体共同作用来确保高放废物与生物圈的安全隔离。膨润土由于具有极低的渗透性和优良的核素吸附等性能而被国际
8、上选作缓冲材料的基础材料。经过全国筛选,高庙子膨润土矿床被选作我国缓冲材料供应基地。从2000年起,对产自该矿床的钠基膨润土GMZ–1开始了系统的研究工作。介绍了GMZ–1的矿物组成、基本特征和GMZ–1在不同干密度、不同含水量条件下的热传导、水传导、力学性能参数及GMZ–1在不同干密度条件下的膨胀特性参数测定结果。GMZ–1Receivedd
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