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<p>The article examines the composition and behavior of corrosion products, γ‑emitting radionuclides of corrosion origin, and α‑emitting radionuclides in the primary coolant of a&#xa0;light-water propulsion reactor in ammonia water chemistry conditions. Activated corrosion products in the coolant are represented by zirconium, chromium, manganese, cobalt, and iron. The total specific α‑activity of the coolant is determined by plutonium, americium, and curium. No increase in the activity of radionuclides in the coolant of a&#xa0;reactor operating at power was observed during the study. The stability of forms and content of impurities in the coolant means that ammonia water chemistry in the primary coolant of small modular reactors can be maintained without dosing under long-time operation conditions.</p>

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Predicting the composition and behavior of impurities in the primary coolant of the light-water small modular reactor based on the operating experience of propulsion reactors

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • S. N. Orlov,
  • A. A. Zmitrodan,
  • A. A. Efimov,
  • G. A. Zmitrodan

摘要

The article examines the composition and behavior of corrosion products, γ‑emitting radionuclides of corrosion origin, and α‑emitting radionuclides in the primary coolant of a light-water propulsion reactor in ammonia water chemistry conditions. Activated corrosion products in the coolant are represented by zirconium, chromium, manganese, cobalt, and iron. The total specific α‑activity of the coolant is determined by plutonium, americium, and curium. No increase in the activity of radionuclides in the coolant of a reactor operating at power was observed during the study. The stability of forms and content of impurities in the coolant means that ammonia water chemistry in the primary coolant of small modular reactors can be maintained without dosing under long-time operation conditions.