On the basis of the data of biological and nonbiological factors collected respectively from 1989 to 1990 and from 1995 to 1996 in the waters nearby the Qinshan Nuclear Power Station, the ecological environment and wa...On the basis of the data of biological and nonbiological factors collected respectively from 1989 to 1990 and from 1995 to 1996 in the waters nearby the Qinshan Nuclear Power Station, the ecological environment and water quality of the waters are analyzed and assessed in the paper. The results show: (a) the surveyed area has the typical ecological characteristics of high tidal range estuary, rich nutrients and low biological productivity, (b) tide, runoff and offshore seawater intrusion are the key factors which result in seasonal and annual changes of various biological and non-biological factors, (c) the risking of seawater eutrophication index is resulted from enormous amount of the discharges of industrial and domestic sewage, (d) because the survey area is located in a high tidal-range estuary, thermal effluent from cooling system does not induce significant temperature changes, ( e) the first stage project of Qinshan nuclear power station has no notable impacts on the ecological environment in展开更多
To achieve excellent production capability and maintain high security for nuclear power stations, equipment reliability is studied as a key issue. As the main branch, equipment reliability management is considered as ...To achieve excellent production capability and maintain high security for nuclear power stations, equipment reliability is studied as a key issue. As the main branch, equipment reliability management is considered as an effective approach to make plant management strategy and organize routine work. Some achievements on research and application of equipment reliability management at Daya Bay Nuclear Power Station are introduced in this paper. By studying and implementing 1NPO （Institute of Nuclear Power Operations） AP-913 equipment reliability process, reliability-centered maintenance （RCM）, critical component management （CCM）, and many other similar methods, equipment reliability management system has been established at Daya Bay. And by continuous effort on improving application effect of these technologies, some innovation has also been made. Some innovative products, such as iSOM Intelligent Expert System, reliability and technique centered maintenance （RtCM）, predictive maintenance system （PdM）, and so on, have been developed. Based on these achievements, Daya Bay Nuclear Power Station has achieved excellent operation performance and won several prizes in WANO （World Association of Nuclear Operators） competition every year.展开更多
核电装备质量文本描述了核电装备在设计、采购、施工和调试阶段出现的质量缺陷等问题。由于不同阶段质量事件的发生频率不同,且同一装备对应不同阶段的质量文本中存在相同的关键词和相似的表述形式,针对类型数量不均衡和语义描述耦合的...核电装备质量文本描述了核电装备在设计、采购、施工和调试阶段出现的质量缺陷等问题。由于不同阶段质量事件的发生频率不同,且同一装备对应不同阶段的质量文本中存在相同的关键词和相似的表述形式,针对类型数量不均衡和语义描述耦合的质量文本分类问题,提出一种融合正则反馈焦点损失函数的改进循环池化网络分类模型。首先,采用BERT(Bidirectional Encoder Representation from Transformers)将核电装备质量文本转化为词向量;然后,提出一个改进的3层循环池化网络的分类模型结构,通过增加中间层并选择合适权重,扩大参数训练的提取空间,提升表征质量缺陷语义特征的能力;接着,提出正则反馈焦点损失函数来训练提出分类模型的参数,通过正则项使损失函数的梯度变化更稳定,根据反馈项对损失函数进行基于真实值和预测值之间误差的迭代调整,解决了不均衡样本在训练过程中梯度偏向不均衡的问题;最后,通过归一化指数函数计算出核电装备质量事件对应的阶段。在某核电公司真实数据集和公共数据集上,与Fast_Text网络相比,所提模型的F1值分别提高了2个百分点和1个百分点,实验结果表明该模型在文本分类任务中具有较高的准确性。展开更多
计算机辅助隔离系统(CBA,Computerized B lock ing Assistance)是大亚湾核电站重要的生产应用软件,能够协助核电站的运行人员进行设备的辅助隔离,为机组检修人员形成一个安全可靠的维修工作现场.以大亚湾核电站实际应用为背景,从申请票...计算机辅助隔离系统(CBA,Computerized B lock ing Assistance)是大亚湾核电站重要的生产应用软件,能够协助核电站的运行人员进行设备的辅助隔离,为机组检修人员形成一个安全可靠的维修工作现场.以大亚湾核电站实际应用为背景,从申请票、隔离票状态的角度,介绍申请票、隔离票的形成过程,以及设备隔离的基本原理,讨论了CBA与生产管理信息系统(COM IS,Corporate Operation M anagem ent Inform ation Sys-tem)的接口技术,最后,介绍实施CBA的几点经验.展开更多
文摘On the basis of the data of biological and nonbiological factors collected respectively from 1989 to 1990 and from 1995 to 1996 in the waters nearby the Qinshan Nuclear Power Station, the ecological environment and water quality of the waters are analyzed and assessed in the paper. The results show: (a) the surveyed area has the typical ecological characteristics of high tidal range estuary, rich nutrients and low biological productivity, (b) tide, runoff and offshore seawater intrusion are the key factors which result in seasonal and annual changes of various biological and non-biological factors, (c) the risking of seawater eutrophication index is resulted from enormous amount of the discharges of industrial and domestic sewage, (d) because the survey area is located in a high tidal-range estuary, thermal effluent from cooling system does not induce significant temperature changes, ( e) the first stage project of Qinshan nuclear power station has no notable impacts on the ecological environment in
文摘To achieve excellent production capability and maintain high security for nuclear power stations, equipment reliability is studied as a key issue. As the main branch, equipment reliability management is considered as an effective approach to make plant management strategy and organize routine work. Some achievements on research and application of equipment reliability management at Daya Bay Nuclear Power Station are introduced in this paper. By studying and implementing 1NPO （Institute of Nuclear Power Operations） AP-913 equipment reliability process, reliability-centered maintenance （RCM）, critical component management （CCM）, and many other similar methods, equipment reliability management system has been established at Daya Bay. And by continuous effort on improving application effect of these technologies, some innovation has also been made. Some innovative products, such as iSOM Intelligent Expert System, reliability and technique centered maintenance （RtCM）, predictive maintenance system （PdM）, and so on, have been developed. Based on these achievements, Daya Bay Nuclear Power Station has achieved excellent operation performance and won several prizes in WANO （World Association of Nuclear Operators） competition every year.
文摘核电装备质量文本描述了核电装备在设计、采购、施工和调试阶段出现的质量缺陷等问题。由于不同阶段质量事件的发生频率不同,且同一装备对应不同阶段的质量文本中存在相同的关键词和相似的表述形式,针对类型数量不均衡和语义描述耦合的质量文本分类问题,提出一种融合正则反馈焦点损失函数的改进循环池化网络分类模型。首先,采用BERT(Bidirectional Encoder Representation from Transformers)将核电装备质量文本转化为词向量;然后,提出一个改进的3层循环池化网络的分类模型结构,通过增加中间层并选择合适权重,扩大参数训练的提取空间,提升表征质量缺陷语义特征的能力;接着,提出正则反馈焦点损失函数来训练提出分类模型的参数,通过正则项使损失函数的梯度变化更稳定,根据反馈项对损失函数进行基于真实值和预测值之间误差的迭代调整,解决了不均衡样本在训练过程中梯度偏向不均衡的问题;最后,通过归一化指数函数计算出核电装备质量事件对应的阶段。在某核电公司真实数据集和公共数据集上,与Fast_Text网络相比,所提模型的F1值分别提高了2个百分点和1个百分点,实验结果表明该模型在文本分类任务中具有较高的准确性。
文摘计算机辅助隔离系统(CBA,Computerized B lock ing Assistance)是大亚湾核电站重要的生产应用软件,能够协助核电站的运行人员进行设备的辅助隔离,为机组检修人员形成一个安全可靠的维修工作现场.以大亚湾核电站实际应用为背景,从申请票、隔离票状态的角度,介绍申请票、隔离票的形成过程,以及设备隔离的基本原理,讨论了CBA与生产管理信息系统(COM IS,Corporate Operation M anagem ent Inform ation Sys-tem)的接口技术,最后,介绍实施CBA的几点经验.
