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核电自主化、国产化、产业化的发展形势要求我国核电行业标准化建设与之相适应,并成为推动我国核电产业自主化、国产化的重要技术支撑.但目前我国还没有权威、统一、协调、与我国工业体系和技术基础相适应的标准体系.尽快建立健全我国的核电标准体系已经成为业界的共识.本文就我国核电标准体系存在的诸多问题及可能的解决方案进行了讨论.提出我国核电标准体系框架建立可以参照电力行业标准体系的结构;根据我国批量建造核电站的需求,按照堆型建立压水堆核电厂设计建造标准体系;我国核安全法规导则与核电技术标准应有效衔接等的设想,并对填补国内核电标准的空白领域提出了建议. 相似文献
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核电自主化、国产化、产业化的发展形势要求我国核电行业标准化建设与之相适应,并成为推动我国核电产业自主化、国产化的重要技术支撑.但目前我国还没有权威、统一、协调、与我国工业体系和技术基础相适应的标准体系.尽快建立健全我国的核电标准体系已经成为业界的共识.本文提出我国核电标准体系框架建立可以参照电力行业标准体系的结构;根据我国批量建造核电站的需求,按照堆型建立压水堆核电厂设计建造标准体系;我国核安全法规导则与核电技术标准应有效衔接等的设想,并对填补国内核电标准的空白领域提出了建议. 相似文献
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我国核电设备标准现状及今后标准化工作的思考 总被引:1,自引:0,他引:1
徐洪海 《核标准计量与质量》2007,(4):51-54
本文通过分析我国核电设备标准化的采标情况及特点,展示了我国核电设备标准化的现状,提出目前我国核电设备采用多国标准存在的问题,对今后我国核电设备标准化工作提出了建设性的意见. 相似文献
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1前言
目前我国核电已进入积极发展的阶段,依据国家规划,到2020年我国核电的规模要达到40000MW的装机容量。为了确保核电安全、经济和快速的发展,促进我国核电的国产化,大力推进我国核电标准工作,建设与我国技术和工业基础相适应的核电标准体系已是当务之急。 相似文献
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秦山核电厂运行15年的核安全审评和监督 总被引:1,自引:0,他引:1
秦山核电厂是我国自主建造的第一座核电厂,它对我国核电事业的发展有着重要的作用。本文总结了秦山核电厂15年的核安全审评和监督情况,对我国核安全监管工作的开展进行了简单的回顾,对今后我国核安全监管工作的发展提出了建设性意见。 相似文献
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王贵洪 《核标准计量与质量》2007,(4):45-47
我国核电和核装置建设中,大多使用国外标准和少量企业标准,还没有形成系列的行业标准和国家标准.本文通过介绍我国核电建设中建造标准的使用情况,以及我国核电建造标准的现状,提出加快我国核电建造标准建设的必要性和标准建设的途径与方法. 相似文献
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On the basis of the previously described increase in internal friction in uranium during heating, a semiquantitative evaluation was made of the dependence of increase in internal friction on the rate of heating, frequency and amplitude of vibrations. The results of the calculations agree satisfactorily with data obtained experimentally. A study was made of the effect of the initial state of the specimen on the increase in internal friction at the initial stages of heating. 相似文献
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B. N. Kolbasov 《Journal of Fusion Energy》1997,16(3):285-290
The paper seeks to provide a summary report of observations and results of some Russian fusion safety studies performed in 1996. Release of tritium and helium from neutron irradiated beryllium at relatively high neutron fluences has a burst nature. With the growth of the beryllium temperature-increase rate to 90 K/s, the temperature of tritium burst release decreases from 800 to 450–500°C and for helium decreases from 1200 to 500°C. Characterization of carbon and tungsten dust produced in experiments simulating plasma disruptions revealed that dust particle distribution of sizes for graphites and carbon fiber composites has a bimodal nature with maxima in the range of 0.01–0.03 and 2–4 m for composite UAM and in the range of 0.14–0.18 and 2–4 m for graphite MPG-8. Chemical reactivity of beryllium with air was studied as well. A mathematical model for beryllium weight gain under its chemical interaction with air at temperatures of 700–800°C as a function of beryllium porosity, temperature, and interaction duration was developed. 相似文献
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Several changes to the focus of Computational Intelligence in Nuclear Engineering have occurred in the past few years. With earlier activities focusing on the development of condition monitoring and diagnostic techniques for current nuclear power plants, recent activities have focused on the implementation of those methods and the development of methods for next generation plants and space reactors. These advanced techniques are expected to become increasingly important as current generation nuclear power plants have their licenses extended to 60 years and next generation reactors are being designed to operate for extended fuel cycles (up to 25 years), with less operator oversight, and especially for nuclear plants operating in severe environments such as space or ice-bound locations. 相似文献
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Momo Takada Toshihiro Yamada Teruhiko Takahara Satoru Endo Kenichi Tanaka Tsuyoshi Kajimoto 《Journal of Nuclear Science and Technology》2017,54(4):452-458
Downward migration of 137Cs in soils was studied in three mixed deciduous forests c.a. 40 km northwest of the Fukushima Daiichi Nuclear power plant (FDNPP), Japan. We selected three different types of forest regarding to environmental condition such as slope inclinations and snow coverage conditions at the time of deposition. We examined temporal changes in the vertical distribution of 137Cs from litter layers to 10 cm soil depth for two years (2.3 to 4.3 years after the FDNPP accident in 2011). At all three study sites, the 137Cs in the litter layer had largely migrated to surface soil by 2013. After 2014, about 80% of the 137Cs in forest soils (litter layer to 10 cm soil depth) remained within 0–5 cm soil layer. The vertical distribution had not changed substantially since 2014, suggesting that changes to the downward migration rates of 137Cs in soils drastically decreased with time. In addition, small amounts of migrating 137Cs could not be detected by the present method because there was a large spatial variation in the distribution of soil 137Cs. The results showed similar patterns of soil 137Cs distribution among the three study sites although there were differences in the environmental conditions. 相似文献
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报道了广东省商检中心放射性检验室开展的广东进出口食品中的放射性检验工作。介绍了检验工作采用仪器的主要性能及应用;给出了分析测量方法和探测下限以及实验的质量保证措施,并给出了检验室测量的广东省几种食品中的放射性含量范围,测量结果与我国食品中放射性活度变化范围大体一致。 相似文献
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自噬对鼻咽癌(Nasopharyngeal carcinoma,NPC)具有抑瘤和促瘤双重作用。自噬在NPC发生、发展及转归中起重要作用:低水平、基础自噬有利于细胞的自我保护与新陈代谢,是NPC放、化疗抵抗的重要因素之一;高水平、过度自噬则可导致自噬性细胞死亡,是基于自噬靶点的NPC治疗基础。自噬剂的研发与应用是实现自噬水平调控的关键环节,自噬抑制剂或自噬诱导剂可增敏NPC放、化疗甚至诱导其自噬性细胞死亡,但其作用机理颇为复杂且迄今尚未完全明了。本文着重综述自噬与NPC放疗研究进展,并探讨自噬作为新靶点的NPC治疗前景,尤其X射线作为自噬剂以诱导NPC发生治疗性的自噬性细胞死亡。 相似文献
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分别采用高效液相色谱法、紫外分光光度法对OxLDL-Ab进行定性、定量分析,评价~(125)I-OxLDL-Ab在正常动物和动脉粥样硬化模型动物的体内分布。正常动物采用昆明小鼠,模型采用载脂蛋白E基因敲除的小鼠(apolipoprotein E-deficient mice,ApoE~(-/-))。高效液相色谱条件为:磷酸缓冲液(PB,0.2 mol/L,pH=7.4)为流动相,流速1.0mL/min,检测波长220nm;紫外分光光度法测得蛋白浓度的标准曲线为:y=0.664 5x-0.008 3,r2=0.999 7。~(125)I-OxLDL-Ab在正常小鼠体内分布实验结果表明:除甲状腺外,各器官的放射性摄取随时间延长而减少,无明显浓集;在注射~(125)I-OxLDL-Ab后1d各器官代谢消除超过2/3,7d后血液中完全清除。~(125)I-OxLDL-Ab在ApoE~(-/-)鼠体内的分布实验中采用w=2%的KI溶液封闭了甲状腺,消除了甲状腺高摄取的影响;靶器官肺有较高放射性摄取,且在注射后4~8h显示出放射性浓集;除血外,其它各器官的靶器官/非靶器官的放射性摄取比值(T/NT)均大于1,其中T/Mu(肌肉)8,显示出~(125)I-OxLDL-Ab对靶器官有一定的选择性。标记抗体的体内靶向性是显像研究中至关重要的一环,要进一步用于动脉粥样硬化早期显像诊断,还需进一步提高靶器官/非靶器官的放射性摄取比值,提高其在体内与其抗原的亲和性。 相似文献