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复合井壁中泡沫塑料板缓压作用实测分析 被引量:1
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作者 许舒荣 《中州煤炭》 2014年第3期8-9,111,共3页
冻结法施工的井筒,通常在外壁与冻结壁之间铺设一层聚乙烯泡沫塑料板,以减缓冻结压力对井壁结构的影响.为深入研究冻结复合井壁中聚乙烯泡沫塑料板的缓压作用,在山东某煤矿副井特厚冲积层冻结法凿井施工中开展了竖井井壁冻结压力的现场... 冻结法施工的井筒,通常在外壁与冻结壁之间铺设一层聚乙烯泡沫塑料板,以减缓冻结压力对井壁结构的影响.为深入研究冻结复合井壁中聚乙烯泡沫塑料板的缓压作用,在山东某煤矿副井特厚冲积层冻结法凿井施工中开展了竖井井壁冻结压力的现场实测研究.实测结果表明:泡沫塑料板具有明显的缓压作用,对冻结井壁外壁混凝土早期强度的提高十分有利,但是泡沫塑料板只能延缓冻结压力的增长,而不能减小最终冻结压力值. 展开更多
关键词 复合井壁 聚乙烯泡沫塑料板 缓压作用
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The Role of Countermeasures in Mitigating the Radiological Consequences of Nuclear Power Plant Accidents 被引量:1
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作者 F.S. Tawfik M.M. Abdel-Aal 《Journal of Environmental Science and Engineering》 2011年第7期920-924,共5页
The countermeasures are the actions that should be taken, after the occurrence of a nuclear accident to protect the public against the associated risks. These actions may be represented by sheltering, evacuation, dist... The countermeasures are the actions that should be taken, after the occurrence of a nuclear accident to protect the public against the associated risks. These actions may be represented by sheltering, evacuation, distribution of stable iodine tablets and/or relocation. This study represents a comprehensive probabilistic study to investigate the role of the adoption of the countermeasures in case of a hypothetical accident of type LOCA for nuclear power plant of PWR (1000 Mw). The effective doses in different organs, short and long health effects, and the associated risks are calculated with and without countermeasures. In addition, the overall costs of the accident and the costs of countermeasures are estimated which represent our first trials to know how much the proposed accident cost. The results showed that, the area around the site requires early and late countermeasures action after the accident especially in the downwind sectors. For late countermeasures, the duration time of relocation ranged from about two to 10 years. The adoption of the countermeasures increases the costs of emergency plan by 40% but reduces the risk associated the accident. 展开更多
关键词 LOCA accident probabilistic risk assessments emergency plan in nuclear power plants.
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