共查询到17条相似文献,搜索用时 58 毫秒
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合肥光源原有的辐射监测系统是为衰减运行模式而设计建造的。为了更好地促进用户实验的科研产出,合肥光源正在进行恒流运行关键系统改造。在改造中,为了保障实验人员和设备的安全,根据恒流运行要求增加了辐射剂量监测点和完善了安全联锁功能。系统基于EPICS开发,由探测器、通讯模块、数据采集监测软件、数据分析系统等组成。该系统既能监测光源区及周边的辐射剂量率水平,还具备计算积分剂量、历史剂量查询以及必要的安全联锁等功能。新系统已经运行三个多月,系统稳定可靠,能很好地满足合肥光源恒流运行模式对辐射监测的要求。 相似文献
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合肥先进光源(HALF)是基于衍射极限储存环的第四代同步辐射光。同步辐射光通过管道进入光束线站,可能会对人体健康产生危害,为此,需要建立线站辐射安全联锁系统。线站辐射安全联锁系统是确保工作人员人身安全的重要保障。基于EPICS和冗余PLC技术,设计了HALF光束线站辐射安全联锁系统,并完成了系统IOC与OPI等软件的开发。最后在研制的原型样机上,进行了冗余PLC主备CPU的切换时间的测试,验证了冗余PLC的性能,满足设计要求。 相似文献
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中子物理实验装置是一台用于钍铀燃料循环系统中子截面测量的加速器装置,在运行时不可避免地产生电离辐射,为了避免人员误入高辐射区受到辐射危害,建立了基于冗余控制技术的辐射安全联锁系统。系统根据人员进出的控制模型,以高可靠性的硬冗余可编程逻辑控制器(PLC)为核心,开发了逻辑控制程序,实现了对联锁设备的控制。经现场测试,辐射安全联锁系统运行稳定、可靠,保护了人员的辐射安全,满足了系统的设计要求。 相似文献
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热释光断代中的年辐射剂量 总被引:1,自引:0,他引:1
李虎侯 《核电子学与探测技术》1988,(6)
本文讨论了热释光断代中的年辐射剂量,指出了环境辐射的正确概念,归纳了作者所采用的测定年辐射剂量方法及其效果。此外,对射气的散逸进行了讨论并叙述其测定方法,还考虑了宇宙辐射的影响。 相似文献
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《Journal of Nuclear Science and Technology》2013,50(10):1009-1015
The paper deals with the analysis of radiation barriers against proliferation focusing on denatured plutonium compositions and associated with the process of plutonium denaturing by some other heavy metals. The issue is discussed from the viewpoint of radiation dose induced by both gamma and neutron radiation, thus reflecting the technical and human resources the potential proliferators should have to meet the challenge of making a nuclear explosive. 相似文献
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To study the level of radiation dose on nuclear medicine of radionuclides with estimation method. We chose some diagnostic and therapeutic radionuclide to estimate the dose of internal radiation and external exposure with the estimation model of the dose coefficient method and point source. The results showed that the effective dose that patient suffered in a single diagnostic CNM procedure was up to 1.63 Sv; the single effective dose that A and B medical staffs suffered were 1.48 μSv and 1.15 μSv. The dosage level of some part of Diagnostic radionuclide beyond medical guidance level. The estimation results was slightly larger than the measured effective dose, less than other estimation. Combined with the actual situation, the estimation model can be used as an effective estimation method of the radiation dose level of nuclear medicine radionuclide. 相似文献
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本文对一种由计算机自动控制并进行数据采集的电子元器件总剂量辐照现场测试系统进行了描述,并通过应用该系统对CMOS数字电路CC4069进行与总剂量辐射同步的电参数在线测量,以及辐照后退火数据的快速采集,研究了CMOS数字电路总剂量辐照在响应特性和辐照后快速时间退火效应。 相似文献
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Photoneutrons, emitted by means of photonuclear interactions when gas bremsstrahlung interacts with beam- line components, can be another potential radiation source needed to be considered for shielding design and dose assessment of beamline. In this paper, simulations and measurements of photoneutrons dose rate at beam- line BL09U are carried out when Shanghai Synchrotron Radiation Facility (SSRF) running at Top-up mode (3.5 GeV, 235 mA). A geometry model is constructed for the beamline BL09U with considerations of the scattering process of the major optical components. The model is compiled into Monte Carlo simulation code FLUKA to calculate photoneutron dose distribution. Measurements of the photoneutrons dose rate were per- formed by using Environmental Neutron Monitor (ENM). Observation points were arranged uniformly along the inside and outside of the optical enclosure (OE) of BL09U. The calculation results agree with experiments within the measurements uncertainties. It is verified that photoneutrons dose simulation is reliable. The simula- tion and measurement methods can be applied to evaluate the neutron dose level of other beamline stations, and provide references for the shielding design of the beamlines at SSRF in the near future. 相似文献