领导重视 全员参与确保质量管理体系认证顺利实施

为了全面提升工厂的管理水平，使质量管理工作迈上一个新台阶，2000年底，我厂决定按照2000版ISO9000族标准建立质量管理体系。为实现这一目标，厂里制定了“五○四厂质量管理体系认证实施方案”，下发了“关于开展质量管理体系认证工作安排的通知”等一系列文件，并对职工进行了2000版ISO9000族标准的宣贯培训，对按ISO9001：2000标准建立质量管理体系进行了认真的策划，编制了质量手册和程序文件，组织了质量管理体系试运行和质量管理体系改进等活动，使我厂的质量管理体系不断得以健全和完善。由于厂管理层对质量工作非常重视，资源配置适宜，各过程基本受控，保证了产品质量的稳定，满足了用户需求，初步做到了质量管理体系的有效运行。2002年6月22日，顺利通过了由兴原质量认证中心对我厂质量管理体系的现场审核，并于7月18日正式获得了质量管理体系认证证书。     

淀粉的辐射降解及应用研究

介绍了＾６０Ｃｏγ射线对淀粉的辐射降解作用，初步研究了辐射剂量，剂量率对淀粉粘度的影响，测定了辐射降解淀粉中羧基的生成量，评价了淀粉辐照后的贮藏稳定性，粘度热稳定性，色泽变化等，简述了产品的应用情况。     

同心协力 开拓创新

2006年，我院全体职工按照“以核为主，多种经营”的方针，团结协作，共同努力，在企业改革、经营管理、科研生产、基本建设、后勤调整等方面都取得了较好的成绩，保质按期完成了各项科研生产任务，全院营业收入首次突破了3亿元，超额完成了集团公司下达的年度各项经营业绩指标。职工收入稳步增长，住房问题继续得到有效缓解，创造了很好的经济效益和社会效益，实现了企业的持续稳定发展。     

NSRL光电子能谱站控制系统改造及软件设计

为了适应同步辐射应用技术发展的需要，我们对合肥国家同步辐射实验室（NSRL）光电子能谱站的数据采集和控制系统的硬件和软件进行了履行，取得了预期的效果。硬件系统方面，增加了一组多功能卡，更换了这控制器，增加了光子能量反馈系统；与之相应的软件得以重写，同时，对软件自身也进行了完善，增加了参数存取功能，修改了数据存储格式，并加入XPS工作模式。通过测量一组Ni的费米边的EDC（Energy Distribution Curve）实验曲线测试了整个系统的工作情况。     

一种放射性同位素溶液分装系统的研制与应用

为适应同位素药品生产发展需要，研制了一种新的放射性同位素溶液分装系统，以机械装置部分取代了原分装过程中的手工操作，使用蠕动泵使分装精度提高，用机械装置的二维传动取代了原分装过程中的两次插入操作，克服了原分装工作存在的主要困难，提高了分装精度和生产效率，减轻了操作人员的工作负荷，减少了操作人员在辐射环境中的操作时间，实现连续生产，并取得了较好的使用效果。     

HTR-10燃料元件装卸系统的集散控制

依据10MW高温气冷实验堆（HTR－10）燃料元件装卸系统的控制要求，对燃料元件装卸系统的集散控制进行了研究，设计了集散控制系统，包括硬件设计，软件设计，步进电动机精确定位闭环控制和无位置传感器转子位置检测的设计，并进行了模拟实验，实验表明，系统的性能稳定可靠，达到了控制要求。     

硅粒子探测器自动中测系统

本文介绍了一种适合硅粒了探测器的自动中测系统，可同时测量１６个样品，全部由微机控制，数据存放在微机中，可以给出了统计数据，也可绘出特性曲线，从而大大提高了测试效率与质量，目前用于测量硅粒子探测器反向Ｉ－Ｖ曲线，实验表明，本装置测得的数据是可靠的，并大大提高了效率。     

秦山300MW核电机组全范围仿真机的实时仿真

介绍了我国秦山３００ＭＷ电机组全范围仿真机的研制，软硬件配置，模型软件，功能及特点。该仿真机集中了核物理，热工水力，自动化，计算机，图象技术等多学科多领域的最新成果，实现了压水堆核电机组全范围的实时仿真。     

EGSWIN计算系统的开发

针对EGS4在用户接口方面存在的缺陷，利用VC^ 、VF开发了基于Windows平台的EGSWIN计算程序包，实现了图形化输入，几何区域处理，并行计算，多记录方式输出，几何实体与粒子径迹显示等，极大地克服了原有EGS4使用上的局限，体现了当前国际上EGS的开发方向，并在一定程序上推动了EGS系列的发展。     

RFX中主动控制非轴对称螺旋形变的电磁系统

介绍了在反场箍缩中利用旋转磁场进行电阻撕裂模控制的实验，简要评述了撕裂模的特性后，又描述了为防止它们产生负面效应所采取的措施，这些措施包括旋转磁场的产生，它能够改变m=0,n=1撕裂模的动态，在环向场线圈中，将交流电分量叠加在环流上产生了旋转磁场，为此，适当改造了环向场回路，在某些条件下，在等离子体柱的螺旋形变上，旋转磁场产生了一个曳矩，由相锁m=1模产生，因此，形变或者位于所选择的环形位置，或者置于边疆的环形旋转中。     

Preparation of Zn/TiO2 powder and its photocatalytic performance for oxidation of P-nitrophenol

Zn-doped TiO2 catalysts were prepared using a sol-gel method and characterized by XPS,UV-Vis, BET, XRD in this study. Under the irradiation of simulant sunlight, the photocatalytic activity for the degradation of p-nitrophenol was studied too. After irradiation for 2.5 h, the degradation percentage of p-nitrophenol could rise to more than 80 %. The results showed that the spectrum absorption band edge of Zn/TiO2 powder does not broaden obviously comparing with pure TiO2 powder. Zinc exists as Zn （11）. When calcined at 973 K, there is a new phase as ZnTiO3 in Zn/TiO2 catalyst. The order of photocatalytic activity of Zn/TiO2 catalysts calcined at different temperatures for p-nitrophenol is 773 K 〉 673 K 〉 873 K 〉 573 K 〉 973 K and the photocatalytic activity of Zn/TiO2 catalyst calcined at 773 K is better than TiO2 catalysts heated at the same temperature, and outclasses that of commercial TiO2 catalyst. It also showed that the photocatalytic degradation of p-nitrophenol follows first-order kinetics under the irradiation of simulant sunlight.     

Current status of radiation therapy for prostate cancer

Radiotherapy for the treatment of prostate cancer has been extensively explored in the past. Along with the comprehensive understanding of the biology of prostate cancer and rapid advances in terms of technology, the out- come of treatment for the patients with prostate cancer has improved. The authors review radiotherapy as the primary treatment for the disease, with particular emphasis on the technological advances from both the radiobiological and radiophysics aspects. Nonconventional fractionated irradiation like hyper- or hypo-fractionation has been imple- mented in the clinic, the final results still need to be confirmed in the future. Technological advances like IMRT, IGRT, in the last two decades have significantly improved the delivery of external radiotherapy to the prostate. This has re- sulted in an overall increase in the total dose that can be safely delivered to the prostate, which has led to modest im- provements in the biochemical outcome. However, establishing the standard therapy for prostate cancer remains con- troversial. It is hoped that the next decades will bring continued advances in the development of biologicals that will further improve current clinical outcomes.     

The control system for SSRF injection and extraction

This paper introduces the injection and extraction control system design for SSRF,which is a distributed control system aimed at stability and reliability of the pulse power supplies,PPS(Personnel Protection System)and MPS(Machine Protection System).The hardware environment is mainly based on PLC(Programmable Logic Con- troller),and ARM(Advanced RISC Machine)is also applied for studying stability of the power supplies.WinCC and EPICS(Experimental Physics and Industrial Control System)have been selected as the platforms of SCADA(Super- visory Control and Data Acquisition).For unifying the interfacing to the control computer,all front-end equipments are connected via Industrial Ethemet.     

水平管内含空气蒸汽强制对流冷凝换热模型研究

为研究含空气蒸汽在水平管内强制对流冷凝换热特性,基于对传热传质过程的分析,建立了管内为环状流与波状流条件下的流动冷凝换热模型。从潜热、显热和液膜3个环节对整个换热过程进行建模,最终得到计算局部冷凝换热系数的理论关系式。模型预测结果与实验数据的对比表明,二者相对偏差在±20%以内,验证了该换热模型的准确性与适用性。通过进一步的研究发现：从换热管入口至出口,随着冷凝的进行,管内换热主要热阻由液膜热阻向气液界面的凝结热阻转变;主流气体对流换热过程基本可忽略。     

Investigations on landmine detection by BF3 detector

Experiments were carried out to investigate the possible use of neutron backscattering for the detection of polyethylene (PE) sample buried in the soil. In detection of landmine by neutrons, the neutron detector and its shield play an important role. In this paper, the effects of graphite, heavy water, polyethylene and boric acid moderators on the flux of back scattered neutrons were investigated. We have also experimentally verified the effect of BF3 detector shield and obtained good agreement with theory.     

Web Services interface of SSRF archive data analysis system

Accelerator database stores various static parameters and real-time data of accelerator. SSRF (Shanghai Synchrotron Radiation Facility) adopts relational database to save the data. We developed a data retrieval system based on XML Web Services for accessing the archive data. It includes a bottom layer interface and an interface applicable for accelerator physics. Client samples exemplifying how to consume the interface are given. The users can browse, retrieve and plot data by the client samples. Also, we give a method to test its stability. The test result and performance are described.     

有效探测面积大于1000 cm2的正比计数器测量系统性能测试

为对自制的活性面积高达1 000 cm²的大面积源进行表面发射率定值,同时作为现有2πα、2πβ表面发射率标准装置能力的扩充,研制了一套内置式大面积2π多丝正比计数器测量系统,并利用活性区直径为8 mm的²⁴¹Am点源及活性区面积为10 cm×15 cm的大面积²⁴¹Am和⁹⁰Sr-⁹⁰Y源对其进行计量学性能测试。结果表明：计数器内计数响应均匀性优于±0.4%,有效探测面积达1 400 cm²;所得²⁴¹Am源高压坪曲线的坪长为1 400 V,坪斜为0.27%/100 V,坪区内计数变化为0.87%;⁹⁰Sr-⁹⁰Y源高压坪曲线的坪长为300 V,坪斜为0.75%/100 V,坪区内计数变化为0.80%;10次测量重复性好于0.4%,8 h内短期稳定性好于0.3%,1 a内长期稳定性好于0.8%。     

Assessment of radioactivity levels in some oil samples from the western desert, Egypt

Distributions of natural gamma-emitting radionuclides were determined in 93 oil samples collected from some petroleum fields in the western desert of Egypt. The radioisotope activities in the area under investigation lay in the range of (21 ± 4) to (38 ± 13) Bq?L-1 for 226Ra, (9 ± 2) to (15 ± 5) Bq?L-1 for 232Th, and (154 ± 28) to (303 ± 54) Bq?L-1 for 40K. The mean values were 27, 12, and 201 Bq?L-1, respectively. Among oils, variations in radionuclide ac- tivities could be on account of differences in TDS, HCO3, and Ba, with high or low pH. In this environment, oil prop- erties differently affected the mobilization of natural radionuclides. The range of 226Ra variation had been compared with available data from other countries. The calculated absorbed dose rate ranged from 22.33 to 32.66 nGy?h-1 in lo- cation (B) and (E) respectively, which was less than the accepted value.     

Preparation and properties of 117m Sn(IV)-TTHMP in in-vitro and in small animals

In this work,TTHMP was synthesized and labelled with 117m Sn.The preparation conditions,stability and lipophilicity of 117m Sn(IV)-TTHMP were investigated.Biodistribution of the complex in rabbits and mice was studied.It was found that the quantity of TTHMP and pH value of the prepararion solution had vital effects on the labeling yield of 117m Sn(IV)-TTHMP.It was also found that 117m Sn(IV)-TTHMP was hydrophilic and stable at room temperature and 37℃ in open air 117m Sn(IV)-TTHMP showed unexpectedly high bone uptake and bone-to-blood ratio in the animals.This made it potentially useful as an reagent for skeletal scintigraphy and radiotherapy of bone tumors.     

The role of AGFA high-energy CR in the calibration and quality control of multileaf collimators （MLC）

Linear accelerators equipped with multileaf collimators （MLC） are becoming more common and are widely used in the intensity-modulated radiotherapy （IMRT）. There is an imperative need to ensure the commissioning specification of the linear accelerators for the sake of quality assurance （QA） and quality control （QC）. This paper is aimed to investigate the role of AGFA high-energy CR （Computed Radiography） in calibrating dynamic multileaf collimators and evaluating the accuracy of the leaf position. The result shows that AGFA high-energy CR can easily and conveniently be used to calibrate MLC and verify its position. Hence, the application of AGFA high-energy CR is proved to be an accurate and time-saving method for routine MLC QC, especially when MLC calibration adjustments are required.