共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
3.
加速器驱动次临界反应堆的结构特点使其安全和控制特性有别于临界反应堆。本工作使用数值计算和仿真运行方法,驱动堆的安全和控制特性进行了初步研究。结果表明:驱动堆不易发生瞬发临界,其安全特性优于临界堆,次临界度越深,安全性越好;驱动堆控制回路具有小的时间常数和超调量,调整时间短,控制特性亦优于临界堆。 相似文献
4.
《Journal of Nuclear Science and Technology》2013,50(4):227-233
The reactor noise analysis technique is particularly useful in reactor diagnosis for on-line monitoring if the raw noise signals can be processed in almost real time. An on-line reactor noise analysis system has been developed with use made of the mini-computer HITAC-10. This system utilizes functions for calculating the power spectral density in almost real time, plots the output by digital incremental plotter, and displays the results by means of color graphic display equipment, in order to detect anomalous reactor conditions with the statistical technique. Using this system, reactor noise signals have been measured and analyzed under various operational conditions in the JMTR. The variance of the power spectral density is found to fit a logarithmic probability density function. This function is independent of the frequency, but is dependent on the number of sampling functions. A logical procedure for anomaly detection based on statistical characteristics has been developed. It is applied to a case where it is supposed that the PWR operating mode in the OWL-1 is the normal process and that the BWR mode is the anomalous. It is demonstrated as a result, that this procedure can successfully detect anomalous processes. 相似文献
5.
《Journal of Nuclear Science and Technology》2013,50(12):859-868
This paper concerns the application of the decoupling theory for a nonlinear system to the power control of the coupled core reactor. By using this theory, we can deal with the power change problem, the regulating problem for a system subject to a large perturbation, etc., which cannot be dealt with by the decoupling theory for a linear system. But, since this theory assumes tacitly that all the states are measurable, the theory can not be applied directly to the nuclear reactor that has nonmeasurable state variables such as the delayed neutron precursor. In this paper, the above difficulty is overcome by introducing the observer theory for a nonlinear system. The decoupling controller and observer resulted from these theories are applied to the coupled core reactor and the dynamic characteristic of the reactor is simulated by the digital computer. The simulation shows that the reactor power of each core is controlled satisfactorily in decoupling manner. 相似文献
6.
核反应堆中子通量密度的广义预测控制方法研究 总被引:2,自引:0,他引:2
将核反应堆中子动力学系统的数学模型变换成一种受控自回归积分滑动平均(CARIMA)模型,在此基础上,提出了中子通量密度的广义预测控制方法。该控制律能有效消除不确定干扰和非线性因素对系统的不良影响,提高系统的控制精度和动态品质。通过计算机仿真比较,证明了该方法优越于古典控制方法。 相似文献
7.
8.
针对核动力堆控制系统这一带不确定参数及干扰的复杂非线性系统 ,本工作用自校正模型算法控制原理提出了一种动力堆热功率跟踪控制的方法。该方法克服了一般多步模型算法控制律所存在的由于模型估计不准或模型参数大幅度变化引起系统动态特性和控制质量变坏的缺点。通过仿真 ,将本方法与一般多步模型算法控制相比较 ,结果证明了该方法可使系统具有更强的鲁棒性和更好的动态品质。 相似文献
9.
10.
11.
12.
动力堆控制系统是一带不确定参数及干扰的复杂非线性系统,采用常规的古典控制很难保证其势功率精确跟踪负荷的变化。本工作利用系统开环脉冲响应序列建立了一非参数模型,并应用多步模型算法控制原理提出了一种动力堆热功率跟踪数字控制方法。该方法跟踪调节性能好、鲁棒性强、能消除不可测干扰。通过仿真检验和调试证明了该方法的正确性和有效性,并实现了热功率-负荷的高精度匹配。 相似文献
13.
14.
15.
16.
17.
核电厂反应堆功率数字冗余控制系统及其可靠性 总被引:1,自引:0,他引:1
针对核电厂反应堆功率控制系统连续运行时间长、可靠性和安全性要求高的特点,提出了一种全新的基于双CPU冗余、电源冗余和ControlNet现场总线网络冗余控制的实现方案,对原有的反应堆功率模拟控制系统进行数字化改造设计,实现反应堆功率的可靠控制.通过对系统的主要可靠性指标进行定量计算和分析,评估了系统的可靠性和可用性. 相似文献
18.
《Journal of Nuclear Science and Technology》2013,50(7):483-498
The possibility eliminating the thermal instability of self-sustained pure and catalyzed D-D fusion reactor plasmas is examined, using the two feedback models of (a) fueling rate and (b) power control (control by power injection or subtraction). Calculations are performed on the bases of linear stability analysis and non-linear dynamic simulation. In contrast to D-T fusion plasma, Cat. D plasma can be stabilized by fueling rate control in all the confinement time scalings adopted in the study. Pure D plasma is not completely stabilized by fueling rate control except when the confinement times are governed by trapped-ion mode (TIM) scaling. The plasma, however, can be maintained near equilibrium state even in forms of scaling other than TIM. Among the different types of fueling rate control, the one most suitable would appear to be deuterium control, in which the rate of deuterium injection is increased [decreased] to counteract temperature increase [decreased]. With power control, temperature increase [decrease] is counteracted by subtraction [addition] of power out of [into] the plasma. Compared with fueling rate control, this method exerts a more direct effect, although it involves a more complex procedure. 相似文献
19.
与临界反应堆相比,ADS次临界反应堆的外源中子和裂变中子的空间分布具有严重的不均匀性,对应的中子价值也不同。本工作对次临界反应堆的稳态输运方程作分群扩散近似,得到了多群方程,进一步推导出按堆芯功率归一化的中子共轭方程表达式和与功率相关的中子价值函数表达式,给出了次临界反应堆中子价值的物理意义。由稳态中子共轭方程组出发,给出了两种带外加中子源的次临界反应堆增殖因数的表达式。 相似文献