本文關(guān)鍵詞：中國(guó)高放廢物地質(zhì)處置緩沖材料大型試驗(yàn)臺(tái)架和熱-水-力-化學(xué)耦合性能研究，由筆耕文化傳播整理發(fā)布。

中國(guó)高放廢物地質(zhì)處置緩沖材料大型試驗(yàn)臺(tái)架和熱-水-力-化學(xué)耦合性能研究

A large-scale THMC experiment of buffer material for geological disposal of high level radioactive waste in China

[1] [2] [3] [4] [5] [6] [7]

LIU Yue-miao, WANG Ju, CAO Sheng-fei, MA Li-ke, XIE Jing-li, ZHAO Xing-guang, CHEN Liang （CNNC Key Laboratory on Geological Disposal of High Level Radioactive Waste, Bei

核工業(yè)北京地質(zhì)研究院,中核高放廢物地質(zhì)處置評(píng)價(jià)技術(shù)重點(diǎn)實(shí)驗(yàn)室,北京 100029

文章摘要：緩沖材料作為高放廢物深地質(zhì)處置庫(kù)中一道重要的人工屏障，與高放廢物容器和處置庫(kù)圍巖直接接觸，在高放廢物衰變熱、輻射作用和地下水等影響下產(chǎn)生復(fù)雜的熱-水-力-化學(xué)耦合作用，為了驗(yàn)證緩沖材料是否能長(zhǎng)期有效地發(fā)揮其屏障材料的作用，，核工業(yè)北京地質(zhì)研究院利用高廟子鈉基膨潤(rùn)土組裝并運(yùn)行了模擬中國(guó)高放廢物地質(zhì)處置室 尺寸的大型緩沖材料膨潤(rùn)土試驗(yàn)臺(tái)架（China-Mock-Up）。建立了緩沖材料試驗(yàn)臺(tái)架的安裝和試驗(yàn)方法，依據(jù)實(shí)測(cè)數(shù)據(jù)和理論分析，揭示了熱-水-力-化學(xué)耦合作用條件下膨潤(rùn)土中的相對(duì)濕度是在加熱器的熱效應(yīng)和外部供水的濕效應(yīng)共同作用下發(fā)生變化的，壓實(shí)膨潤(rùn)土中應(yīng)力的變化主要是由于膨潤(rùn)土遇水膨脹和加熱器的熱效應(yīng)引起的，試驗(yàn)驗(yàn)證了模擬高放廢物地質(zhì)處置室內(nèi)加熱器（廢物罐）運(yùn)行初期的位移過程，為緩沖材料和高放廢物地質(zhì)處置庫(kù)的設(shè)計(jì)提供了重要的工程參數(shù)和理論依據(jù)。

Abstr：The buffer material as one of the most important components of engineered barrier system is the last defence between waste container and host rock. This barrier plays an important role in stabilizing the repository excavations under the coupled thermal-hydro-mechanico-chemical （THMC） conditions, and in providing low permeability and diffusivities, and long-term retardation. To guarantee the long-term safety of the engineered barrier, a large-scale mock-up facility, named China-Mock-up is constructed in the laboratory of BRIUG. This facility concentrates on the research on Gaomiaozi-Na-bentonite, which is currently considered as the candidate buffer and backfill material for China＇s high level waste （HLW） repository. Methods of construction and test for buffer material Mock-Up is established. The current experimental data of the facility are reported and analyzed in the paper. The saturation process of the compacted bentonite is influenced by the competing mechanisms of drying effect induced by the heater and the wetting effect by the water penetration. The stress evolution of the compacted bentonite may be influenced by the thermal expansion induced by high temperature and the swelling pressure generated by bentonite saturation. The evolution of displacement of the heater which is to simulate vertical placement of a container with radioactive waste is validated for the first time. The experiment is evaluated THMC processes taking place in the compacted bentonite-buffer during the early phase of HLW disposal and to provide a reliable database for numerical modeling and further investigations of EBS, and the design of HLW repository.

文章關(guān)鍵詞：

Keyword：:high level radioactive waste geological disposal buffer material Na-bentonite coupled THMC large-scale Mock-Up

課題項(xiàng)目：國(guó)家國(guó)防科技工業(yè)局項(xiàng)目（科工計(jì)[2008]138號(hào)）.

作者信息：會(huì)員可見

  本文關(guān)鍵詞：中國(guó)高放廢物地質(zhì)處置緩沖材料大型試驗(yàn)臺(tái)架和熱-水-力-化學(xué)耦合性能研究，由筆耕文化傳播整理發(fā)布。