Abstract

An analysis of various schemes for coolant motion in a nuclear reactor with spherical microfuel elements (coated fuel particles, or pebbles) is presented. The conditions under which it is possible to reduce the pressure losses in the coolant keeping all the advantages of the spherical microfuel elements versus the fuel rods are considered. The rate of coolant flow and the pressure losses in the reactor during its longitudinal-axial and radial motion through the pebble bed are determined. An interchannel scheme of coolant motion is proposed, and the conditions are defined for which it has advantages over the radial scheme.

中文翻译：

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减少先进航天器核动力推进系统卵石床反应堆中的水力损失

摘要

提出了对带有球形微燃料元件（涂层燃料颗粒或小卵石）的核反应堆中冷却剂运动的各种方案的分析。考虑了可以减少冷却剂中的压力损失并保持球形微燃料元件相对于燃料棒的所有优点的条件。确定了反应器在通过卵石床的纵向，轴向和径向运动过程中的冷却剂流量和压力损失。提出了一种冷却剂运动的通道间方案，并定义了其条件优于径向方案的条件。