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<p>In order to improve the resource characteristics of main circulating pumps (MCPs) for nuclear reactors, the JSC “Afrikantov OKBM” conducted calculation studies and experimental work for optimizing the blade profile by improving the hydrodynamics of the flow around the inlet section. The studies aimed to develop impellers of the BN-600 MCP‑1 that are resistant to cavitation erosion. As a&#xa0;result, their cavitation-erosion wear was significantly reduced. The design of BN-1200 MCP‑1 and MCP‑2 ensures criteria based on the operating experience of the BN-600 MCP‑2 without any traces of cavitation-erosion wear after ~167,000 h of operation. In addition, corresponding blade profiling insensitive to feed changes was performed. Three-dimensional calculations were used to optimize the geometry of flow sections without developing expensive test benches. The design of BN-1200 MCP‑1 and MCP‑2, based on the experience of operating sodium pumps and CFD optimization calculations, will ensure the required resource of their flow parts.</p>

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Development of flow parts for MCP-1 and MCP-2 main circulating pumps of the BN-1200 reactor upon the experience of designing and operating main circulating pumps of BN-350, -600, -800 reactors

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • N. G. Skulkin,
  • D. V. Dormidontov,
  • E. N. Skulkina,
  • M. N. Fomin

摘要

In order to improve the resource characteristics of main circulating pumps (MCPs) for nuclear reactors, the JSC “Afrikantov OKBM” conducted calculation studies and experimental work for optimizing the blade profile by improving the hydrodynamics of the flow around the inlet section. The studies aimed to develop impellers of the BN-600 MCP‑1 that are resistant to cavitation erosion. As a result, their cavitation-erosion wear was significantly reduced. The design of BN-1200 MCP‑1 and MCP‑2 ensures criteria based on the operating experience of the BN-600 MCP‑2 without any traces of cavitation-erosion wear after ~167,000 h of operation. In addition, corresponding blade profiling insensitive to feed changes was performed. Three-dimensional calculations were used to optimize the geometry of flow sections without developing expensive test benches. The design of BN-1200 MCP‑1 and MCP‑2, based on the experience of operating sodium pumps and CFD optimization calculations, will ensure the required resource of their flow parts.