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Abstract <p>This article presents the results of comparative structural studies of steel with increased nickel content intended for the reactor pressure vessel with supercritical coolant parameters (<i>T</i> ≥ 400°C, pressure ≥25 MPa) after long-term strength tests. Structural factors in samples from various melts that affect their long-term strength characteristics are identified. Recommendations are formulated to improve the stress rupture characteristics of high-nickel pressure vessel steel.</p>

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Evaluation of the Influence of Structural Parameters on the Long-Term Strength Characteristics of High-Nickel Steel for the Vessels of Promising VVER-Type Reactors

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • E. A. Kuleshova,
  • I. V. Fedotov,
  • A. A. Potekhin,
  • D. A. Maltsev,
  • S. P. Kuznetsov,
  • I. A. Ivanov

摘要

Abstract

This article presents the results of comparative structural studies of steel with increased nickel content intended for the reactor pressure vessel with supercritical coolant parameters (T ≥ 400°C, pressure ≥25 MPa) after long-term strength tests. Structural factors in samples from various melts that affect their long-term strength characteristics are identified. Recommendations are formulated to improve the stress rupture characteristics of high-nickel pressure vessel steel.