共查询到18条相似文献,搜索用时 187 毫秒
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控制棒驱动线是一个比较复杂的系统,仅通过动力学建模计算分析无法准确获得其步进载荷值,因此开展反应堆驱动线控制棒步进载荷试验研究,对进一步改进和完善控制棒驱动机构的设计,验证其动力学模型的准确性,提供其安全性和可靠性等方面具有重大的实用价值。本文研究对象为"华龙一号"反应堆控制棒驱动线,模拟其在反应堆压力容器中的实际安装方式和对中,对其进行了步进载荷的实际测量,得到了控制棒驱动线在提升和下插过程中的步进载荷值,为后续的相关计算验证工作提供了准确的数据支撑。 相似文献
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在中国先进研究堆(CARR)调试阶段,发现其控制棒驱动机构在转向过程中存在驱动线圈与控制棒运动不同步的现象。为掌握控制棒驱动机构的转向性能参数,在静水条件下进行了控制棒驱动机构转向性能测试试验。试验表明:驱动线圈与控制棒运动不同步是磁悬浮式控制棒驱动机构的固有特性;棒位、棒速和驱动线圈通电电流大小等因素对静水条件下转向性能影响不大,且四组驱动机构静水条件下转向性能具有一致性。 相似文献
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针对同步磁阻电机型控制棒驱动机构(CRDM)电磁高度耦合难以对输出力矩进行有效线性调节的问题,研究了同步磁阻电机型CRDM的矢量控制技术。将同步磁阻电机CRDM的数学模型映射至同步旋转坐标系内,对输出电磁力矩与磁链进行解耦。通过励磁电流与力矩电流的独立调节,实现输出力矩的线性控制。利用MATLAB/SIMULINK搭建了同步磁阻电机型CRDM的矢量控制模型,对控制方案进行验证。仿真结果表明,本研究的控制方案具有更优的响应速度、稳态精度以及平稳性。 相似文献
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为获得中国先进研究堆(CARR)控制棒驱动机构电磁力及电磁场分布,对控制棒驱动机构进行了受力分析,设计制造CARR控制棒驱动机构试验样机。在试验样机上进行了电磁力试验,使用有限元分析软件Ansoft Maxwell对试验样机电磁场及电磁力分布进行仿真分析,计算得到了试验样机磁感应强度分布曲线和电磁力分布数据,以及永磁体磁场对电磁场的影响和结构参数对电磁力的影响。仿真结果与试验值符合较好,研究结果为CARR控制棒驱动机构电磁力研究和同类型控制棒驱动机构设计提供了参考。 相似文献
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In the event of the reactor accident, the control rod drive mechanism (CRDM) must be able to drop quickly and achieve the safe shutdown. In order to ensure the safety of the reactor, the nuclear power plant puts toward higher requirements on the failure rate of the CRDM. In this paper, the design algorithm of the test scheme for the failure rate of the CRDM and the corresponding solution method based on the dichotomy method were proposed. The correctness was verified by comparison with the scheme given in GB 5080.5-85. It supplements the design algorithm of the fixed-end censored test scheme for success rate verification test scheme of the success or failure type products in GB 5080.5-85. Based on any given success rate, risk value and discrimination ratio, it can give the censored test protocol in a short time. It also designs the success rate verification test scheme for general success or failure type products to meet the increasing reliability requirements for success or failure type products. 相似文献
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控制棒水压驱动技术是由清华大学核能与新能源技术研究院发明的具有自主知识产权的一项新型专利技术。组合阀是该项技术的关键部件,而组合阀是由3个直动电磁阀组成,因此,电磁阀的性能直接影响组合阀的性能,从而影响控制棒水压驱动技术的运行性能。本文就控制棒水压驱动系统运行过程中所出现的工况,对其直动电磁阀线圈进行了温升实验研究,并运用ANSYS软件进行了理论分析。分析结果表明:在电流增大情况下,线圈温度均会增大;线圈内壁温度高于外壁温度;线圈中间温度高于边缘温度。通过线圈温升研究可进一步优化直动电磁阀的设计。 相似文献
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为研究控制棒驱动机构(CRDM)的结构可靠性规律,考虑CRDM承压壳体的多失效模式,根据应力强度干涉理论建立与CRDM步跃动作次数相关的结构动态可靠性模型。用顺序统计量描述强度失效模式下应力幅值的动态分布模型,基于Miner累积损伤理论和疲劳等效应力分布模型建立结构疲劳寿命和累积损伤分布与步跃冲击载荷作用次数的关系。研究结果表明,在步跃冲击载荷作用下,承压壳体前期的结构可靠度主要由强度失效模式的可靠度决定,当步跃动作达到一定次数时,疲劳失效模式的失效率开始显著增大;相对于疲劳失效模式,强度失效模式的可靠度对应力均值的变化更加敏感。该结果可对CRDM承压壳体的可靠性设计和维修管理提供参考。 相似文献
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《Journal of Nuclear Science and Technology》2013,50(8):913-922
A highly reliable control rod drive mechanism driven by an electric motor installed inside the reactor vessel (INV- CRDM) for a very small reactor has been designed. The INV-CRDM contributes to the compactness and simplicity of the reactor system, and can eliminate the possibility of a rod ejection accident. In the design, a new type of latch mechanism using an electromagnetic force to directly connect both of the shafts, one of which was the motor driven shaft and the other the control rod driving shaft, was applied so as to make the INV-CRDM very compact. The cable supplying current remained stationary, even when both of the shafts was moving. The required functions of the latch mechanism are to maintain an adequate latching force for the control rod shaft to move within a stroke of 370 mm, and to release the shafts in a shorter time than 0.2 s after a scram signal is received. A functional test with a model that approximately simulated the design was conducted to test the latching force and de-latching at room temperature. The test showed that the latching force increased with the current of the magnet coil, as did the de-latch time. The post-test analysis with a finite element analysis code revealed that the clearance between the two shafts greatly affected the latching force. With the same analysis method, the design analysis of the latch mechanism at a high temperature condition of 300°C was conducted, and it was confirmed that the latch mechanism contained enough latching force. 相似文献