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铀矿地质分析测试技术回顾与新形势下网络实验室构建 总被引:1,自引:0,他引:1
回顾了目前铀矿地质分析测试所使用的元素分析技术、核素和同位素分析技术、元素形态分析技术、微区分析技术、流体包体与有机成分分析技术。提出了铀矿地质分析测试技术的几个重点发展方向,包括高精度质谱分析技术研究、专用标准物质研究、现场分析技术研究、微区原位分析技术研究和有机成分分析技术研究。探讨了新时期核工业地质分析测试网络实验室运作模式。主要思路是以核工业北京地质研究院分析测试研究中心为骨干,以核工业地质局各区域研究所和大队实验室为成员,建立更密切的协作关系,构建核工业地质分析网络实验室。实现资源共享,发挥其整体优势,更好地为核工业地质服务。 相似文献
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为环境样品超痕量核材料分析开始筹建洁净实验室并开发分析技术,包括整体分析和粒子分析。对于整体分析,采用了ICP-MS和TIMS技术进行U和/或Pu的浓度和同位素比值分析。而对于粒子分析,将使用SIMS测定每个粒子中的U和/或Pu的同位素比值。本文简要地介绍了分析技术的开发概貌并描述了目前使用ICP-MS进行整体分析的开发状况。 相似文献
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与地浸砂岩型铀矿有关的分析测试技术发展趋势 总被引:1,自引:1,他引:0
在分析铀矿地质对分析测试需求的基础上,提出了今后几年与地浸砂岩型铀矿有关的分析测试技术的发展趋势。主要发展的技术是:以XRF和ICP-MS为主要手段的高精度、高灵敏度和高效率的元素分析技术;以多道α能谱、低本底高纯锗γ能谱和高精度质谱分析技术为主要手段的核素和同位素分析技术;以联用技术为主的元素形态分析技术;以荧光显微观测、电子探针和激光探针为主要手段的微区分析技术;以各种色谱技术为主的有机成分分析技术;以化学分析技术为主的微生物成分分析技术。此外,引入物理化学概念,解释砂岩铀矿成矿过程,有利于拓宽砂岩铀矿找矿思路,帮助砂岩铀矿地质分析参数的设置。 相似文献
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井间示踪测试技术新进展 总被引:2,自引:0,他引:2
对油田井间示踪测试技术的发展概况进行简要叙述。分析了各代技术的优缺点;根据油藏动静态描述手段和原理及测试解释技术理论并结合矿场实践进展,对解释方法进行了对比分析,提出了从示踪剂选择到测试解释的优化技术体系;另外,示踪剂技术目前出现了多个分支,尚处于矿场试验阶段。本文给出了部分有关测试成果和解释成果,以及相关的分析和评价。井间示踪测试技术是目前成熟和先进的油藏开发动态测试技术之一,对于解决油田开发过程中面临的实际问题具有重要的实用价值和指导意义,应用前景广阔。 相似文献
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分析了核磁共振技术在癌症临床诊断领域的应用现状、相关理论与技术的发展趋势,概述了对核磁共振设备产生的FID信号、MRI和MRS的数据分析技术,并以MRS为重点,研究了FID信号和波谱数据的特点,提出了利用小波变换和模式识别技术对FID信号和波谱数据进行分析的技术方案,并对信号的小波阈值去噪、小波基函数的选择、MRS特征识别与提取等问题进行了探索性研究,对核磁共振为基础的相关技术在癌症临床诊断领域内应用的进一步发展提示了方向。 相似文献
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Accident prevention and mitigation programmes and the Emergency Response System (ERS) are important elements of the Agency's activities in the area of nuclear power plant (NPP) safety. Safety Codes and Guides on siting, design, quality assurance and the operation of NPPs have been produced and are used by NPP operating organizations. Nuclear safety evaluation services are provided by the IAEA. The Emergency Response System and the International Nuclear Event Scale (INES) have been developed. The framework for the development of an accident management programme has been set up. The main goal is to develop an Accident Management Manual to provide a systematic, structured approach to the development and implementation of an accident management programme at NPPs. An outline of the Manual has been distributed and the first draft is available. The component parts are: co-ordinated research programmes (CRPs) on severe accident management and containment behaviour; the use of vulnerability analysis; mitigation of the effects of hydrogen, and generic symptom oriented emergency operating procedures. The IAEA provides guidance by the dissemination of information on methods for accident management; collates information on approaches in this field in different organizations and countries; and arranges exchange of experience and the promulgation of knowledge through the training of NPP managers and senior technical staff. 相似文献
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E.G. Fischer 《Nuclear Engineering and Design》1978,46(1):151-167
The purpose of this paper is to give an overview of the various qualification procedures available to the vendors of nuclear power plants and equipment for hopefully achieving NRC (Nuclear Regulatory Commission) plant licensing and overall guaranteed safe operation. These procedures usually involve computer-aided analyses for large systems and structures, but trend toward shaking table tests for small equipment and components.The dynamic analysis and testing required for seismic qualification can be covered in a practical manner by reference to several pertinent Regulatory Guides and Standards. They have been issued by the NRC on specific subjects, but often represent a consensus of more general standards prepared by ASME, IEEE, ASCE, ANSI and NEMA. These documents cover such diverse subjects as (a) reactor site criteria, (b) seismic design limits and loading combinations, (c) system damping values, and (d) recommended vibration test practices.The author has been directly concerned with IEEE Std 344 on seismic qualification practices and has therefore included the latest ideas and suggestions for revising this document. In general, there has been a continuing escalation in the g-level of seismic requirements. This present overview indicates a need for R&D work and re-examination of published documents to counterbalance unwarranted conservatism. 相似文献
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Shohei Onitsuka Tadashi Iijima Tomonori Yamada Shinobu Yoshimura 《Journal of Nuclear Science and Technology》2019,56(1):1-16
ABSTRACTSeismic design of nuclear power plants (NPPs) is important for ensuring their integrity during earthquakes. Seismic analysis has been conducted using lumped mass beam models (LMBMs) for the design of plants in Japan, whereas three-dimensional (3D) finite element models (FEMs) have been used for novel plants outside Japan. The purposes of this study are to organize issues related to the development and application of 3D FEMs for seismic analysis of Japanese NPPs and to indicate future study directions. To organize these issues, the authors systematically investigated: (1) international guides and standards related to seismic analysis and (2) 3D FEMs of novel NPPs outside Japan. By considering other studies on the issues, the authors suggest directions for future studies. Resolving the issues will contribute to application of 3D FEMs for seismic analysis in the design of Japanese NPPs. 相似文献
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C. Gordon Duff 《Nuclear Engineering and Design》1990,123(2-3)
This paper presents some of the simplified procedures and methods used by AECL for the seismic qualification of CANDU Nuclear Power Plants (NPPs). The approaches described herein are well tested and have been used in Canada and elsewhere for a number of years. Most of these simplified seismic analysis, testing and inspection procedures, and their underlying principals, have been accepted by the Atomic Energy Control Board of Canada for licensing purposes. In this respect, a comprehensive inspection of completed NPPs, to determine their ability to safely survive a design basis earthquake (DBE), is a prerequisite for licensing of CANDU NPP's in Canada. Many of the methods and recommendations given in the following tie in closely with [1]. 相似文献
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A new procedure for probabilistic seismic risk assessment of nuclear power plants (NPPs) is proposed. This procedure modifies the current procedures using tools developed recently for performance-based earthquake engineering of buildings. The proposed procedure uses (a) response-based fragility curves to represent the capacity of structural and nonstructural components of NPPs, (b) nonlinear response-history analysis to characterize the demands on those components, and (c) Monte Carlo simulations to determine the damage state of the components. The use of response-rather than ground-motion-based fragility curves enables the curves to be independent of seismic hazard and closely related to component capacity. The use of Monte Carlo procedure enables the correlation in the responses of components to be directly included in the risk assessment. An example of the methodology is presented in a companion paper to demonstrate its use and provide the technical basis for aspects of the methodology. 相似文献