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首页> 外文期刊>International Journal of Heat and Mass Transfer >The optimum design and arrangement of a steam generator in an integral pressurized water reactor
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The optimum design and arrangement of a steam generator in an integral pressurized water reactor

机译：整体压水反应堆中蒸汽发生器的优化设计和布置

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摘要

This paper presents a double-tube once-through steam generator (DOTSG), whose tube unit includes an outer straight tube and an inner helical tube, in an integral pressurized water reactor (IPWR). To obtain the optimum structure of the inner helical tube and the arrangement of DOTSGs in the reactor pressure vessel, a two-level optimization method is used, aiming at the lower pumping power needed, and a smaller reactor pressure vessel volume is used. The pitch of inner helical tubes and the central distance of outer tubes are considered design parameters when minimizing the pumping power with the genetic algorithm in the bottom level, while the number of tube units in a single DOTSG and the number of DOTSGs in the reactor pressure vessel (RPV) are optimized to obtain the minimum volume of the IPWR, which is conducted in the top level. The optimum pitch of the helical tube varies in the sub-cooled region, boiling region and superheated region. The results show that the smaller pitch brings a shorter tube length and a higher pressure drop, and the effects are strong in the sub-cooled region and the superheated region but weak in the boiling region. In this way, the optimal structure of the inner helical tube is a small pitch in the single-phase region and a large pitch in the boiling region. According to the bottom level results, the optimum arrangement of DOTSGs in the pressure vessel is determined.
机译：本文提出了一种双管直通蒸汽发生器（DOTSG），该管的单元包括一个整体式增压水反应堆（IPWR）中的一个外直管和一个内螺旋管。为了获得内螺旋管的最佳结构和DOTSG在反应堆压力容器中的布置，针对所需的较低泵送功率，采用了两级优化方法，并使用了较小的反应堆压力容器体积。当使用最低级别的遗传算法将泵送功率降至最低时，内部螺旋管的螺距和外部管的中心距离被视为设计参数，而单个DOTSG中的管单元数和反应堆压力中的DOTSG数优化船只（RPV）以获得IPWR的最小体积，该体积在顶层进行。螺旋管的最佳螺距在过冷区域，沸腾区域和过热区域中变化。结果表明，较小的螺距会带来较短的管长和较高的压降，并且在过冷区和过热区的影响较大，而在沸腾区的影响较小。以此方式，内螺旋管的最佳结构是在单相区域中的小螺距和在沸腾区域中的大螺距。根据最低水平的结果，确定压力容器中DOTSG的最佳布置。

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