共查询到19条相似文献,搜索用时 71 毫秒
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用外周血淋巴细胞染色体畸变(双+环)和微核的剂量效应曲线估算了5例受~(60)Co γ线事故照射病人的生物剂量。结果表明,在照后早期,用上述两种方法估算的剂量与物理剂量基本一致。尤其对较均匀照射的3例(A、B和E)“双十环”剂量与物理剂量相当吻合,同时发现,用微核率估算的剂量偏高。本文对上述结果进行了讨论。 相似文献
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一例事故受照者的剂量估算和染色体畸变的随访观察 总被引:1,自引:0,他引:1
本文报道用染色体畸变分析估算一例~(60)Co 源事故受照者的剂量及3 a 的随访观察结果。结果表明,用染色体畸变分析估算的剂量为1.46 Gy,与用物理方法测得的剂量(1.42 Gy)几乎相等;双着丝粒体加着丝粒环(双+环)是估算剂量的最佳指标;在照后3 a 受照者染色体畸变仍高于正常水平。 相似文献
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本文报道了1986年4次~(60)Coγ射线意外事故11名受照者的生物剂量估算。2次事故受照者于照后24小时检测,另2次事故受照者则于照后48小时进行。用已建立的外周血淋巴细胞ACP及中性粒细胞LAP活力的细胞化学检测估计受照者的辐射剂量。估算得出的最低受照剂量约为0.10Gy,而最高则达1.90Gy左右。初步讨论了LAP及ACP活力的细胞化学检测在生物剂量估值中的优点及照后使用抗放药物对ACP活力的细胞化学检测的影响。 相似文献
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对一起^60Co源辐照事故中受到过量照射的人员,通过现场调查和模拟试验,确定了照射的几何条件和受照时间,估算了4名受照者的造血干细胞活存计权等效剂量。最后将物理方法与生物学方法估算的剂量数据作了比较。 相似文献
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本文报道了一起~(60)Co 源辐照事故中受照人员的剂量模拟测量结果。经调查和现场模拟实验,确定了受照条件。使用组织等效人体模型和 LiF(Mg,Cu,P)热释光剂量计测定了受照人员的器官吸收剂量。事故受照人员 F(男)和 L(男)的造血干细胞活存计权等效剂量分别为1.24和0.3 Gy,红骨髓计权平均剂量分别为1.29和0.31 Gy,全身平均吸收剂量分别为1.22和0.32 Gy。 相似文献
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《Journal of Nuclear Science and Technology》2013,50(9):894-913
Developed as a remedy-oriented system for systematically analyzing and evaluating human- related incidents occurring in nuclear power plants, the present system aims particularly at identifying causal factors and at deriving proposals for specific hierarchical countermeasures. Unlike conventional methods, which are based on checksheet format, and are thus devoid of logical methodology for conducting the analysis, and which thus lack the means of searching for underlying causal factors, and which do not record factual information on the sequence of events, our system incorporates innovative techniques such as; (a) a modified fault tree method for searching the underlying causal factors, (b) compilation of related events into sequential charts, (c) technique for devising proposed hierarchical redundant countermeasures, and (d) implementation procedures set out in practical manual form for easy familiarization and application. Through several trial applications, our method has proved to permit identifying underlying causal factors even down to those associated with the software aspects of human action and state of mind, and with the mode of management, organization, operating rules and document forms, all of which are liable to be overlooked. The results of analysis are stored in database to permit subsequent searching to serve as useful material for activities aimed at promoting plant operation safety. 相似文献
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广东核电的现状与发展战略 总被引:1,自引:0,他引:1
描述了广东核电起步创业过程,简介了广东大亚湾核电站建设及其商业运行以来的良好业绩,为广东核电发展奠定了坚实的基础;进而以广东岭澳核电站建设的实践,证明国务院关于在广东实行”以核养核、滚动发展”方针的正确性。岭澳核电站在大亚湾核电站的基础上进行了改进提高,目前各项工作进展顺利。本文在这样的形势下,适时提出广东核电跨世纪发展战略思路,为推动中国核电产业化发展而努力。 相似文献
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针对海洋核事故应急情况,提出了具备快速装卸的船舶核辐射防护装置的设计和宽束γ耦合MCNP算法。该算法用于指导核辐射防护装置设计,并通过实验对算法进行验证的同时分析了核辐射防护装置的防护性能。实验结果表明:所采用的耦合算法真实可靠,防护性能分析结果可为驶入辐射区域船舶核辐射防护装置铺设提供指导。 相似文献
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设计、构建了一种基于常用手机端APP软件"微信"实现对环境辐射剂量率实时监控的系统。该系统借助第三方云平台服务器使辐射监测仪连入互联网,通过网络云平台的特定网络接口使辐射监测仪与微信服务器建立起绑定连接。上层界面在微信APP上使用HTML5结合脚本语言设计,底层辐射监测仪采用碘化钠闪烁体搭配光电倍增管以及后端的WIFI模块、MCU模块等完成数据采集处理。在数据通信协议方面,选用了Websocket与MQTT协议组合的方式,提高了系统的通信效率。该系统实现了辐射监测仪的远程监护,界面设计简单、操作便利、实时性好、通信效率高。 相似文献
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描述了反应堆运行阶段的维修策略和维修方法,介绍了以设备可靠性为中心的现代维修理念,提出了在反应堆堆修管理中的各种具体要求以及在维修过程中应正确运用的相应维修策略和维修方法,以满足反应堆安全、可靠、经济和高效运行的原则。 相似文献
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《Journal of Nuclear Science and Technology》2013,50(8):663-677
A study is made of the nuclear characteristics of blanket/shield design intended for the D-D tokamak reactor incorporating a cooperative effort by the University of Illinois, Brookhaven National Laboratory and Lawrence Livermore Laboratory. The reactor is characterized by high value of plasma beta (β=0.3) and low value of neutron wall loading (W n =0.436 MW/m2). The 1 m-thick blanket is composed mainly of graphite, and the 1 m-thick shield is a combination of B4C, Al and H2O. Multi-dimensional calculations are carried out to confirm the results of one-dimensional calculation and to assess the problems inherent in the design. Compared to blankets constituted of other materials, the graphite blanket possesses the characteristics of much smaller residual radioactivity, afterheat and biological hazard potential, which could possibly more than offset the lower nuclear heating that can be provided. The design requirements for the magnet shield are satisfied by the present combination and thicknesses of blanket/shield materials. 相似文献