To study the characteristics of the mass transfer of noncondensable gases in the primary loop of the nuclear icebreaker reactors, models of the core and the up-core space were developed using the Relap5 (USA) and Fluent (USA) codes and modeling of interphase mass transfer and transport of the gas phase by the water coolant was performed on these sections. Spatial non-uniformity of the content of undissolved gases, which arises as a result of vapor-gas bubbles concentrating in the vortex structures of the flow and resulting in a significant reduction of their dissolution rate, was revealed. This must be taken into account in the analysis of the operation of the primary loop equipment of nuclear icebreakers (hydrogen absorption in the titanium alloys of steam-generator piping, nodular corrosion of the zirconium cladding of the fuel rods).

中文翻译：

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核破冰堆主冷却剂对不凝性气体的传质特性

为了研究核破冰船反应堆主回路中不可凝气体的传质特性，使用 Relap5（美国）和 Fluent（美国）代码开发了堆芯和堆芯上空间模型以及相间质量建模在这些部分进行了水冷却剂对气相的转移和传输。揭示了未溶解气体含量的空间不均匀性，这是由于蒸汽气泡集中在流动的涡流结构中并导致其溶解速率显着降低而引起的。在分析核破冰船主回路设备的运行时必须考虑到这一点（蒸汽发生器管道钛合金中的氢吸收、燃料棒锆包壳的球状腐蚀）。