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中子注量

中子注量的相关文献在1989年到2022年内共计160篇,主要集中在原子能技术、一般工业技术、无线电电子学、电信技术 等领域,其中期刊论文72篇、会议论文22篇、专利文献101026篇;相关期刊22种,包括四川大学学报(自然科学版)、同位素、核科学与工程等; 相关会议19种,包括中国核学会2015年学术年会、中国辐射防护学会2014学术年会、四川省电子学会曙光分会第十七届学术年会暨中物院第十届电子技术青年学术交流会等;中子注量的相关文献由477位作者贡献,包括陈伟、邱东、郑春等。

中子注量—发文量

期刊论文>

论文:72 占比:0.07%

会议论文>

论文:22 占比:0.02%

专利文献>

论文:101026 占比:99.91%

总计:101120篇

中子注量—发文趋势图

中子注量

-研究学者

  • 陈伟
  • 邱东
  • 郑春
  • 王群勇
  • 白小燕
  • 阳辉
  • 陈冬梅
  • 刘毅娜
  • 王强
  • 金晓明
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 邹鹏; 操节宝; 张彪; 王云波; 杨斌; 康长虎
    • 摘要: 在单晶硅孔道中子注量测量实验中,布置的活化探测器需要人工拆卸,为减少实验人员在拆卸探测器时的受照剂量,需针对辐照装置选择合适的铝合金材料.当中子注量率及辐照时间确定时,使用JANIS软件查找活化探测器的截面及半衰期等核参数,计算出铝合金常含元素辐照后的比活度.根据比活度及机械强度,筛选出两种铝合金(5A66及2A25),并与6061铝合金进行放射性活度比较,最后用MCNP软件对不同铝合金材质的辐照装置进行剂量模拟.模拟分析结果表明:1)5A66铝合金在三种材料中剂量当量最低,出堆十五天后,辐照装置外表面半高度位置的剂量当量为25.44μSv/h,5A66铝合金辐照装置满足本次实验要求;2)从放射性角度考虑,今后在选择辐照装置铝合金材料时,Zn、Cr、Fe、Ni元素含量应尽可能少.
    • 刘东鹏; 夏兆东; 朱庆福; 李晓慧
    • 摘要: 中子注量可作为加速辐照实验的辐照指标.为了通过加速辐照的方式检验中子吸收材料的中子吸收性能,计算了中子吸收材料贮存不同时间下的中子注量.通过对乏燃料组件初始富集度、燃耗深度以及乏池温度、可溶硼浓度的研究,得到中子吸收材料在乏池贮存时中子注量的包络值,同时计算得到不同贮存时间材料10 B的消耗量.结果表明,材料的中子吸收性能在贮存10~60 a的情况下并无明显变化.本文结果可为检验材料的中子吸收性能提供支持.
    • 石秀安; 苏耿华; 包鹏飞
    • 摘要: 总结分析了目前压水堆辐照监督管中子注量的工程计算方法和流程.通过理论研究和敏感性分析,提出了部分改进的计算方法.根据实际核电厂辐照监督管快中子注量计算结果与实测值的比较,证明了本文提出的改进方法的合理性和先进性.
    • 徐航; 王英; 刘毅娜; 王志强; 李坚; 刘海侠; 周红召
    • 摘要: 为了有效降低长计数器中子探测能量下限并解决5 MeV以上能量响应急剧下降的问题,利用蒙特卡罗程序MCNP5分析了长计数器各结构参数对能量响应的影响.通过使用不同含氢量的慢化体、添加中子吸收材料及添加补偿材料相结合的方法,优化设计了一种长计数器.结果表明:使用含氢量较低的中子慢化材料聚苯乙烯可提高低能中子能量响应;采用Cd作为中子吸收材料可解决能量响应局部过高的问题;采用Pb作为补偿材料可提高高能中子能量响应.设计优化的长计数器在1 eV~15 MeV能量范围内能量响应最大相对偏差约为10.1%.
    • 凌礼恭; 孙海涛; 高晨; 徐宇
    • 摘要: Basing on the irradiation supervision of improved M310 units, the radiation supervision codes and standards for PWR Pressure vessels were analyzed. The technical points of ductile brittle transition temperature design curve, prediction formula, irradiation monitoring tube and sample setting, extraction plan and so on were studied and summarized. The effect and evaluation method of radiation monitoring data were analyzed and studied. Focusing on the difficulties encountered in the review of the applicability of the radiation monitoring codes for the Shidao Bay air cooled reactor and the correction of the radiation temperature effect. PWR radiation monitoring regulations and standards is relatively perfect. It is a feasible idea to establish the radiation monitoring plan of high temperature gas cooled reactor, basing on the principles of PWR related standards and combining with the characteristics of high temperature gas cooled reactor core physical parameters.%本文以我国M310改进型机组压力容器辐照监督为研究对象,梳理和分析了适用于压水堆压力容器的辐照监督规范体系.对辐照监督中韧脆转变温度设计曲线、预测公式、辐照监督管与试样设置、抽取计划等技术要点进行了研究和总结.结合标准规范的要求对辐照监督数据的作用和评价方法进行了分析研究和分步演绎.然后基于压水堆辐照监督的要求和堆型特点,重点研究了石岛湾气冷堆辐照监督规范适用性和辐照温度效应的修正等审评中遇到的难点.结论如下,压水堆压力容器辐照监督法规、标准体系较为完善,基于压水堆相关标准的技术原理,结合高温气冷堆的堆芯物理参数的特点,制定高温气冷堆的辐照监督方案是一个可行的思路.
    • 鲁艺
    • 摘要: 利用晶体管直流增益随中子辐照注量的变化关系,建立了基于电压补偿的晶体管直流增益在线测试系统,以模块化软件架构设计方法及电压回读技术,实现了不同辐照功率下晶体管直流增益的实时监测,获得了辐照期间晶体管器件敏感参数的变化规律.结果表明,在不同中子注量辐照下,研制的直流增益在线测试系统可满足晶体管损伤效应的实时测量要求,系统的测试精度达0.2%.
    • 邹德慧; 荣茹; 邱东; 艾自辉; 鲁艺; 吕学阳; 范晓强
    • 摘要: 利用硅双极晶体管在线监测中子注量,其直流增益和损伤常数是作为探测器指标的重要参数.高温退火可使受到中子辐照的双极晶体管性能部分恢复,进而可以重复使用.开展高温退火特性研究,分析双极晶体管直流增益的恢复程度以及损伤常数的重复性.在快中子脉冲堆上对贴片型3DG121C双极晶体管进行三轮中子辐照,每轮辐照累计注量2.64×1013 cm-2.经过第一轮中子辐照后,双极晶体管直流增益下降至辐照前的40%,经过180 °C连续24 h的高温退火后,直流增益恢复至辐照前的67%;经过第二轮辐照后,直流增益下降至第二轮辐照前的50%,在相同条件下退火后,直流增益恢复至第二轮辐照前的73%;经过第三轮辐照后,直流增益下降至第三轮辐照前的58%,在相同条件下退火后,其直流增益恢复至第三轮辐照前的87%.三轮实验结果表明:双极晶体管直流增益倒数随辐照中子注量变化的线性关系基本一致,具体表现为其损伤常数具有很好的重复性.利用该高温退火特性,将双极晶体管作为中子注量探测器应用于快中子脉冲堆中子注量在线监测,监测结果与活化箔结果基本吻合.%The direct current gain and damage constant are important indexs, when silicon bipolar transistors is used for neutron fluence on-line detector.Neutron irradiation can degrade the bipolar transistor direct gain, and the performance would recover partly by high temperature annealing,so the detceor can be used repeatly.High temperature annealing characteristic of bipolar transistors have been done to analyse direct current gain recovering level and damage constant repetitive.The three rounds of irradiation-annealing experiments have been performed using unsealed bipolar transistors 3DG121C on fast burst reactor for fluence 2.64×1013 cm-2.After the first round of neutron irradiation, the current gain decrease to 40% of pre-irradiation and recovered to 67% of pre-irradiation after 24 h annealing at 180 °C.After the second round of neutron irradiation, the current gain decrease to 50% of before the second round irradiation and recovered to 73% of before the second round irradiation after the annealing process the same with the first round.After the third round of neutron irradiation, the current gain decrease to 58% of before the third round irradiation and recover to 87% of before the third round irradiation after the annealing process the same with previous two rounds.Three rounds of experiments have shown that the linear relationship between reciprocal current gain and neutron fluence is basically consistent, in other words, the radiation damage constants have a well repetitive.Concerning this high temperature annealing characteristic, the BJTs can be used as an online neuron fluence detector of equivalent neutron fluence monitor of CFBR-II reactor.The results basically agree with the results from activation foil.
    • 杜金峰; 宋旺旺; 王三丙; 谢奇林; 范晓强; 梁文峰
    • 摘要: 针对40 kWe热管型月球堆的辐射屏蔽问题,建立了三维蒙特卡罗计算模型。屏蔽布局方式整体采用地埋式,堆芯上方的轴向屏蔽体则采用影锥构形,选取适用温度范围宽、耐辐照的碳化硼作为中子屏蔽材料,伽玛屏蔽材料则采用钨,模拟计算了空腔及钨层厚度对轴向屏蔽体后端典型位置的辐射影响,同时也考察了百米外人员所受剂量随径向屏蔽体厚度的变化关系。据此得到了热管型月球堆初步的屏蔽体构型,其总质量为215 t ,十年运行寿期内紧靠屏蔽体后端的敏感器件最大中子注量(1 MeV等效)为186×1014 cm-2、最大伽玛剂量为368 Mrad,而人员剂量仅为1192 mSv/a,在较大的裕量范围内满足辐射安全要求。%Three⁃dimension Monte Carlo calculation model was built to study the radiation shielding of heat pipe cooled lunar surface reactor with 40kWe. The lunar soil buried shielding method was chosen for the overall layout and the cone⁃shadow configuration was adopted for the axis shielding. B4 C was used for neutron shielding owing to its large range of applicable temperature and high radia⁃tion resistant, and W was adopted for gamma shielding. The radiation fluence on the back end of the axis shielding versus the chamber and W’ s thickness were calculated. The dose for an astronaut 100 m away versus the radial shield thickness was also calculated. The primary shielding configuration was provided and the whole mass was 215 t. The maximal neutron fluence (1 MeV equivalent) was 186 × 1014 cm-2 and the maximal gama dose for the radiation sensitive component was 3. 68Mrad, dose for an astronaut 100 m away was only 1192 mSv/a. The shield design can satisfy the shielding requirements with a large margin.
    • 鲁艺; 邱东; 李俊杰; 邹德惠; 荣茹
    • 摘要: Background: The transient neutron radiation damage effect was an important parameter for evaluating radioresistance of electron device. Purpose: The aim is to obtain the response to transient irradiation of bipolar transistors under pulse neutron radiation. Methods: In this paper, the silicon bipolar transistors (3DK9D) with good similarity of parameters have been employed as the displacement damage monitors based on the liner relationship between the reciprocal of gain and the neutron flux. Response characteristic of pulse neutron radiation for this transistor was obtained by on-line measuring the variation of zero-frequency gain the along with accumulation of the neutron flux. Results: The transient neutron radiation damage effect on transistors was the combined action of ionizing damage and displacement damage. Conclusion: The results shown that the transient irradiation effect of transistors was more remarkable than steady irradiation with the same accumulative neutron flux.%瞬时中子辐射损伤效应是评价电子器件抗辐射能力的一项重要指标。利用晶体管直流增益的倒数与中子注量呈线性关系这一特点,采用参数一致性好的硅双极晶体管3DK9D 作为位移损伤探测器,通过在线监测晶体管直流增益随累积中子注量的变化,获得了双极晶体管对脉冲中子辐照的响应特性。结果表明,晶体管的瞬时辐射效应是电离损伤和位移损伤共同作用的结果。在相同累计中子注量下,瞬态辐照损伤效应远强于稳态辐照损伤结果。
    • 冯琦杰; 刘耀光; 杨万奎; 张松宝; 石炳元; 杨锐
    • 摘要: 材料在辐照过程中所受的中子注量是辐照性能研究中的一个重要参数.上联箱铝材作为300#研究堆关键结构材料,经历了从反应堆首次临界到退役的全过程,极具材料辐照效应研究价值.为获取整个反应堆运行寿期内的上联箱中子注量水平,须克服堆芯装载变化频繁与堆芯不断扩大装载两大关键难点,故提出了堆芯归并等效计算方法.通过该方法的成功应用,得到了300#研究堆寿期内上联箱铝材的中子注量,并进行了误差分析.
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