共查询到18条相似文献,搜索用时 66 毫秒
1.
2.
对超导直线加速器的分段进行了详细的研究。包括超导加速器的分段原则的讨论,对称性分段和非对称性分段的讨论。超导加速腔的加速单元数及设计值βo的确定,加速器能量增益的确定。 相似文献
3.
4.
5.
6.
为避免人员误入辐射区域造成人身伤害事故,建立了一套安全联锁系统.本文阐述了安全联锁系统的设备组成和信号联锁功能,基于西门子故障安全型PLC模块,保证控制系统安全可靠、稳定性好、操作简便,确保加速器运行前后及运行过程中相关人员的辐射安全.安全联锁系统已开发完成,进行了总体联调与测试,达到了设计要求. 相似文献
7.
8.
加速器驱动次临界系统(ADS)与核能可持续发展 总被引:2,自引:0,他引:2
描述了ADS系统的主要技术特点和在我国核能可持续发展战略中的作用及地位;介绍了国内外ADS研究的状态和发展趋势;提出了ADS研发必须解决的关键技术问题及解决这些问题的时间表;分析了ADS研发与国内核能相关发展计划的关系;并就我国开展ADS的研发提出了一些建议。 相似文献
9.
10.
11.
12.
13.
根据中国加速器驱动嬗变研究装置(CiADS)的建设要求,完成了CiADS中次临界反应堆的概念设计。次临界反应堆为液态铅铋冷却快中子反应堆,采用半池式-半回路式的布置方式,通过主容器的中心管实现了与散裂靶在结构上的耦合。燃料组件及换料方式采用相对成熟的技术方案,设置了铅铋主冷却剂辅助系统,通过多种专设安全设施来保证反应堆的安全。CiADS次临界反应堆充分考虑了堆靶耦合界面的可实现性,利用了液态铅铋冷却剂良好的传热性,结合了池式堆冷却剂自然循环的特性及回路式堆冷却剂装量少的特性,具有良好的可行性、安全性、布置灵活性和技术扩展性。 相似文献
14.
为补偿由于次临界反应堆的燃耗所损失的反应性,降低次临界反应堆功率对加速器束流的依赖,考虑钍的转换,给出了采用钍基燃料,液态铅-铋合金单一回路冷却、石墨慢化的ADS快热单向耦合次临界堆芯设计方案。结果表明:本设计方案实现了堆芯功率展平、中子单向耦合,延长了换料周期,并消除了空腔的不利影响;堆芯寿期内的温度反应性反馈为负效应,安全性高;堆芯具有较高的能量放大能力;堆芯寿期内k_(eff)变化不超过1.05%;所需加速器最大束流强度为4.21mA;堆芯的MA嬗变支持比可达15个百万kW级的PWR,嬗变能力强。 相似文献
15.
16.
在模拟计算程序LINE-ACC/PC基础上,结合单一搜索方法和非线性最小二乘算法编程,实现一个X波段2MeV行波加速管的物理设计。应用此方法可以有效缩短加速管的优化设计时间。文章给出的优化计算可应用于一类常相速周期结构的加速管设计。文章同时给出了纵向粒子动力学、盘荷波导的几何尺寸及加速管的工作特性等方面的计算结果。 相似文献
17.
《Journal of Nuclear Science and Technology》2013,50(10):888-901
A method for solving the time-energy-dependent diffusion equation was devised to appreciate the effect of spatial harmonics on the power distribution in a subcritical graphite-moderated core with a pulsed fast neutron source. An instantaneous power peaking factor (IPF) was calculated using the thermal neutron flux thus obtained, to characterize the power distribution in the core. In case of a 50-cycles-per-second injections of fast neutron pulses of 3 ms pulse width, it was indicated that the value of IPF increased by 4.1 times with the decrease in the multiplication factor from 0.9951 to 0.9762, accompanying fuel burnup. To appreciate the dependence of the core power distribution on the spectrum hardening of the thermal neutron flux caused by injections of pulsed fast neutrons, comparison was made between the value of IPF and that derived from the time-dependent-one-group diffusion theory where the spectrum hardening of the thermal neutron flux was ignored. It was indicated that the disregard of the spectrum hardening of the thermal neutron flux resulted in the low estimate of IPF that changed from ?1% to ?14% with the decrease in the pulse width of pulsed fast neutrons from 3 ms to 0.15 ms. 相似文献
18.
《Journal of Nuclear Science and Technology》2013,50(3):483-490
For a dedicated transmutation system, Japan Atomic Energy Agency (JAEA) has been proceeding with the research and development on an accelerator-driven subcritical system (ADS). The ADS proposed by JAEA is a lead-bismuth eutectic (LBE) cooled fast subcritical core with 800 MWth. JAEA has started a comprehensive research and development (R&D) program since the fiscal year of 2002 to acquire knowledge and elemental technology that are necessary for the validation of engineering feasibility of the ADS. In this paper, the outline and the results in the first three-year stage of the program are reported. Items of R&D were concentrated on three technical areas peculiar to the ADS: (1) a superconducting linear accelerator (SC-LINAC), (2) the LBE as spallation target and core coolant, and (3) a subcritical core design and reactor physics of the ADS. For R&D on the accelerator, a prototype cryomodule was built and its good performance in electric field was examined. For R&D on the LBE, various technical data for material corrosion, thermal-hydraulics and radioactive impurity were obtained by loop tests and reactor irradiation. For R&D on the subcritical core, engineering feasibility for the LBE cooled tank-type ADS was discussed using thermal-hydraulic and structural analysis not only in normal operation but also in transient situations. Reactor physics experiments for subcritical monitoring and physics parameters of the ADS were also performed at critical assemblies. 相似文献