浅谈核电工程建设阶段经验反馈体系策划与工作实施

经验反馈是核电厂重要管理工作之一,对于保障核电厂建造质量和核电厂安全稳定远行有着重要意义。该文介绍了核电工程建设阶段经验反馈体系构建和开展经验反馈工作的思路,以期为在建核电工程经验反馈体系策划和具体实施工作提供借鉴和参考。该文参考运行核电厂经验反馈管理标准,结合工程建设阶段核电厂管理实践,总结提出工程建设阶段核电厂经验反馈管理体系策划和管理实施方面的良好实践,以期为核电工程建设单位经验反馈体系构建和工作实施提供借鉴和参考。     

EPC模式下核电全厂通信系统项目过程管理难点解析

在压水堆核电厂建设期间,核电全厂通信系统设备数量很大,遍布整个电厂.其在核电厂设备安装、调试阶段起着举足轻重的作用.核电厂全厂通信系统设备具有规格繁杂、数量大、采购数量不确定等特点,也正是因为这些特点,给国内正处于核电EPC模式发展阶段的项目管理带来很大的挑战.作者通过大量实践,总结出EPC模式下核电全厂通信系统采购包从招投标、合同执行、安装、调试等项目生命周期全过程中易出现的管理难点,并提出解决方案.为后续核电系统采购包项目管理提供有价值的管理建议.     

核电工程项目移交接产管理方法研究

移交接产是核电工程建设不可或缺的一部分,贯穿于整个电站的建设过程。通过移交接产工作可以及时发现并处理机组在设计、制造、施工阶段的缺陷或错误,为确保核电站的建设质量与运行安全奠定基础。在阐述移交接产管理重要意义的基础上,从移交接产的组织机构、运作机制、考核机制建立以及分项分阶段管理等方面提出了核电工程项目的移交接产管理方法,为后续其它核电工程的移交接产管理累积宝贵经验。     

核电站调试阶段的最小TOTO系统移交管理浅析

核电站工艺系统复杂、建设周期长,调试实施和移交过程的顺利开展是保障机组商运准备的关键环节,其移交管理成效直接影响工程项目建设的进度和质量。本文阐述了核电站移交接产管理特点,总结了机组调试阶段最小TOTO(Take Over for Temporary Operation,临时运行移交/交接试运行)系统的设置原则,并对调试阶段最小TOTO系统的引入意义进行了分析,为后续核电工程的调试实施和移交管理做好指引。     

浅谈核电建设期的计划管理

核电发展对我国能源安全和能源基地的合理布局有重要的战略意义。核电的建设管理模式的不同,核电的工程计划管理工作的内容也会随之发生变化。本文是在大业主工程管理模式下(监理、设计、采购、土建、安装、调试均外包)对二代加改进技术的M310核电机组在建设期的计划管理工作进行了简单的探讨。分工程计划的分阶段和分级管理、计划管理职责分工、进度计划的编制、计划的调整控制四个方面分别介绍了核电建设中的计划管理工作。     

宝龙城市广场环境影响评价研究

分析了宝龙城市广场工程组成及主要环境影响,并且分别对项目建设期和运营期对水环境、大气环境、噪声环境、固体废物环境以及环境经济损益分析等几个方面进行了分析探讨,提出了防治污染和减缓影响的保护措施。通过分析为同类项目工程建设减少对环境的影响,指导工程环保设计和环境管理工作提供参考。     

核电工程总承包企业的知识管理

核电作为安全、清洁、高效能源和战略性新兴产业,在当前面临着巨大的发展机遇。核电工程总承包企业承担着核电项目工程设计、设备采购、建安施工、启动调试全过程总承包管理业务,对核电工程项目的安全、质量、进度、费用负有重要责任。为进一步提高核电工程建设的专业水平与服务质量,为核电站的安全运行提供可靠的建设保证,核电工程总承包企业需充分调动与运用企业的知识资源,从目标规划、组织机构建设、制度建设、平台建设等方面,全面开展知识管理工作,确保企业整体水平和竞争优势的稳步提高。     

河源一期2×600MW超超临界机组DCS工程经验总结

本文针对河源电厂2×600MW超超临界机组工程建设中DCS方面的工作,从系统设计、安装、软件组态、调试等方面进行了总结,归纳了工程中需要注意的一些关键点及相关措施,可供国内同型机组参考。     

秦山三期（重水堆）核电站工程建设和重大技术创新

秦山三期重水堆核电站是我国首座商用重水堆核电站,也是中国和加拿大两国政府间迄今最大的贸易项目。业主秦山第三核电有限公司在工程建设、调试及自主运行的过程中,坚持自主创新管理,有效实施工程质量、进度和投资三大控制;并在消化吸收CANDU-6技术的基础上进行改进,提高机组的安全性和可靠性。工程的建设实践,使我国核电工程管理在已有的基础上,基本实现了程序化、信息化的规范管理并与国际接轨。工程建成后,在保证机组安全稳定运行的基础上又进行了多项技术改进和创新,使机组性能持续提高。在人才培养方面,注重培育企业文化,强化人员培训,建立起员工培训与工程建设互相促进的良性循环机制。秦山三期工程在核电项目管理水平的提高和发展,可为推动我国核电发展和大型引进工程的规范化管理提供借鉴。     

国际接轨的工程造价控制方法

工程造价控制是工程投资建设管理的核心部分,始终贯穿工程建设的全过程,包括:前期的可行性研究、投资决策,到建设期的设计、施工、监理,再到项目投产调试、运行所需全部建设费用的确定、控制、监督和管理。在国际化的今天,如何使用通用而优越的工程造价控制方式,优化造价管理和控制是我们急需解决的一个课题。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.