共查询到20条相似文献,搜索用时 125 毫秒
1.
2.
3.
4.
5.
研制了以FPGA为数据采集核心、单片机为数据处理器的多通道新的γ剂量率仅.文中介绍了FPGA与单片机的通信接口设计、FPGA设计的数据采集模块与功能仿真图和单片机软件和硬件设计框图.并对单片机部分软件设计进行了阐述.设计过程中最大限度的利用数字技术.经过测试,实现了较好的效果. 相似文献
6.
7.
秦山核电二期工程反应堆及反应堆冷却剂系统的仪表和控制设计参考了大亚湾核电站的设计,但作了冷却剂系统三环路改二环路的适应性修改.本文总结了秦山核电二期工程反应堆及反应堆冷却剂系统仪表和控制的设计、重要仪表控制设备的研制.具体介绍了反应堆保护系统保护变量的选取、反应堆控制系统对堆芯的控制和监测以及提高核电厂可利用率的设计,并着重介绍了重要仪表控制设备的国产化研制过程.1号机组的成功运行证明设计和研制是非常成功的. 相似文献
8.
设计了一个用于2.45 GHz低杂波电流驱动系统的交指型腔体带通滤波器.根据交指型带通滤波器的准确设计理论,获得滤波器的结构尺寸.利用HFSS软件仿真,提高了设计效率和精度,最终仿真结果和理论结果一致,证明了设计方法的可行性. 相似文献
9.
秦山核电二期工程核岛电缆敷设设计实践 总被引:2,自引:0,他引:2
核电厂电缆敷设设计具有电缆数量多、分类复杂和要求严格的特点,这导致了核电厂特别是核岛的电缆敷设从设计过程到完成形式都与一般民用工程有很大的差别.在秦山二期电缆敷设设计中,中国核动力研究设计院(NPIC)与业主和核二院密切合作,并借鉴了国外的先进技术,采用了电厂布置设计软件(PDL)和电缆敷设设计软件(PERICLES 2),完成了电缆敷设的设计工作,保证了工程的顺利进行.本文主要介绍了秦山核电二期工程核岛电缆敷设的设计过程及方法. 相似文献
10.
BEPCⅡ在通过提高注入频率、提高打靶流强、加大磁号等方式达到设计目标的同时拟采用次谐波聚束系统来进一步提高其正电子注入速率.该系统需要两台功率稳定度和脉内相移要求很苛刻的高功率微波固态放大器作为功率源.作为该项目的预研部分,目前已完成了系统原型机的设计工作,本文介绍了射频微波固态放大器的设计方法和流程,并以该系统的前级驱动模块为例阐述了具体设计过程.借助于Agilent公司的射频微波EDA工具EEsoft ADS进行了匹配电路的设计和优化仿真,高效地完成了系统的设计,达到了设计要求. 相似文献
11.
《Fusion Engineering and Design》2014,89(9-10):2066-2070
On the Linear IFMIF/EVEDA Prototype Accelerator (LIPAc), the validation up to 9 MeV deuteron beam with 125 mA continuous wave is planned in Rokkasho, Aomori, Japan. Since the deuteron beam power exceeds 1 MW, safety issue related to γ-ray and neutron production is critical. To establish the safety management indispensable to reduce radiation exposure for personnel and activation of accelerator equipment, Personnel Protection System (PPS) of LIPAc control system, which works together with Radiation Monitoring System and Access Control System, was developed for LIPAc. The management of access to the accelerator vault by PPS and the beam duty management of PPS are presented in details. 相似文献
12.
The Radiation Monitoring System (RMS) in a nuclear power plant is used for assessing radiological impact of plant operation. A classical RMS consists of several types of radiation detectors strategically placed about a nuclear plant to ensure the safety of operating personnel and the surrounding environment. It serves in conjunction with, and as a backup to, a comprehensive sampling program to quantitatively evaluate process systems and effluent activity levels. The development of the computerized and digitalized RMS is reviewed with emphasis upon its added capability and flexibility. The potential future requirements for the RMS, as a result of regulatory criteria development, is briefly discussed. 相似文献
13.
14.
建设和完善全国辐射环境监测网络初探 总被引:2,自引:0,他引:2
本文从分析我国环保系统辐射环境监测的现状和存在的主要问题出发 ,建议在现有基础上建设和完善一个既覆盖全国各省 ,又层次分明、突出重点、相互合作 ,并常规和应急监测积极兼容的全国辐射监测网络。该监测网络将能对污染源排放的重要污染核素和对公众健康影响最大的核素进行监测。系统由三部分组成 :( 1 )二个中心 ,国家环保总局辐射环境监测技术中心 ,国家环保总局核与辐射事故应急技术中心 ;( 2 )若干个重点监测站 ;( 3 )若干个基础监测站。 相似文献
15.
16.
17.
Over the past several years, Westinghouse has developed a coordinated system of on-line diagnostic instrumentation for the acquisition and analysis of data for diagnostics and incipient failure detection of critical plant equipment and systems. Primary motivation for this work is to improve NSSS availability and maintainability through the detection of malfunctions at their inception. These systems encompass the following areas: (1) Vibration Monitoring System for detection of changes in vibrational characteristics of the major components of Nuclear Steam Supply System (NSSS) and Balance of Plant (BOP); (2) Acoustic Monitoring System for detection and location of leaks in the primary system pressure boundary and other piping systems in PWRs; (3) Metal Impact Monitoring for detection of loose debris in the reactor vessel and steam generators; (4) Nuclear Noise Monitoring System for monitoring core barrel vibration; (5) Sensor Response Time Measurement System for detecting any degradation of process sensors; and (6) Transit Time Flow Meter for determining primary coolant flow rate. Summarized in this paper are some of the features of the systems and in-plant experience. These experiences demonstrate that diagnostic systems in combination with analytical and laboratory work for data interpretation do improve plant availability. 相似文献
18.
介绍了上海同步辐射光源的X射线光束位置测量系统的控制和数据获取,具体描述了位置测量系统的控制和数据获取的总体设计、原理和软件系统,以及在上海同步辐射光源(SSRF)光束线线站的应用。 相似文献
19.
20.
The application of statistical algorithms in the problem of early detection of technogenic, nuclear power plant emissions
in the atmosphere near the ground by means of the spectrometric channel of ARMS (Automatic Radiation Monitoring System) is
examined. It is noted that the changes in the radon progeny content which are associated with the diurnal behavior of the
intensity of turbulent mixing influence the variance of the readings in the 131I and 137Cs detection ranges. As a result, when a stationary Poisson model is used in the algorithm the number of false alarms increases
and the algorithm becomes ineffective. Regional corrections lowering the probability of false alarms to ≤10–3 with correct detection probability ≥0.7 were introduced into the detection and classification algorithm on the basis of the
results of monitoring performed over the course of a year for intervals with stationary γ background. 相似文献