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Monte Carlo simulation of a research reactor with nominal power of 7 MW to design new control safety rods

机译:蒙特卡洛模拟研究额定功率为7兆瓦的研究堆,以设计新的控制安全棒

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The Monte Carlo simulation has been established for a research reactor with nominal power of 7 MW. A detailed model of the reactor core was employed including standard and control fuel elements, reflectors, irradiation channels, control rods, reactor pool and thermal column. The following physical parameters of reactor core were calculated for the present LEU core: core reactivity (ρ), control rod (CR) worth, thermal and epithermal neutron flux distributions, shutdown margin and delayed neutron fraction. Reduction of unfavorable effects of blockage probability of control safety rod (CSR)s in their interiors because of not enough space in their sites, and lack of suitable capabilities to fabricate very thin plates for CSR cladding, is the main aim of the present study. Making the absorber rod thinner and CSR cladding thicker by introducing a better blackness absorbing material and a new stainless steel alloy, respectively, are two studied ways to reduce the effects of mentioned problems.
机译:已为标称功率为7 MW的研究堆建立了蒙特卡洛模拟。采用了反应堆堆芯的详细模型,包括标准和控制燃料元件,反射器,辐照通道,控制棒,反应堆池和热塔。对于当前的LEU堆芯,计算了以下堆芯物理参数:堆芯反应性(ρ),控制棒(CR)值,热和超热中子通量分布,停工裕度和延迟中子分数。减少控制安全棒(CSR)在其内部的阻塞概率的不利影响,因为其位置空间不足,并且缺乏合适的能力来制造用于CSR熔覆的极薄板,这是本研究的主要目标。分别通过引入更好的黑度吸收材料和新型不锈钢合金来使吸收杆更细和CSR包层更厚是两种减少上述问题影响的研究方法。

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