Hydrogen Degradation of the Pressure Gas Tanks Materials after Long-Term Service

Balitskii, Alexander; Semerak, M.; Balitska, V.; Subota, Andriy; Wus, Oleh

doi:10.4028/www.scientific.net/ssp.225.39

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Особливу увагу необхідно приділяти роторам парових турбін. Оскільки вони працюють в складних експлуатаційних умовах, а їх поломка може призвести до катастрофічних наслідків [3,4].…”

Section: вступunclassified

Verification of Geometric Models of the LPC Rotor of the K-1000-60/3000 Turbine Unit Based on Natural and Critical Frequencies in the Ansys Software Complex

Chernousenko,

Marysiuk

2023

ENERHETYKA: ekonomika, tekhnolohiyi, ekolohiya

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One of the priority tasks of the energy industry is to ensure the reliable and safe operation of steam turbine units of thermal power plants and nuclear power plants. Given the difficult situation in the country, it is impossible to replace outdated equipment that has exhausted its design resource with new ones. As is known, the safety factor of the material taken into account during the design of steam turbine equipment was very approximate. At that time, there were no data on the operation of power equipment, which would have already worked for 200-220 thousand hours. in difficult operating conditions. The situation has changed now. There are power installations that have exhausted or are close to exhausting their design resource. By conducting experimental studies with metal samples of this equipment, it is possible to significantly clarify the physical and mechanical properties of steels and their damage due to operation. Therefore, the problem of extending the resource is becoming increasingly important. Computer modeling has greatly simplified the task of calculating the resource of the equipment. However, such a complex object as a steam turbine requires significant computing resources, and the calculation of equations in all finite element nodes is quite time-consuming. It is necessary to look for ways to rationalize calculation mathematical models. At the same time, the accuracy of the calculation should remain at a satisfactory level. In this work, were created simplified geometric models of the rotor of the LPC turbine unit К-1000-60/3000. The option is considered of replacing the working blades with equivalent distributed masses and toroidal rings. Verification of the obtained models based on critical rotation frequencies confirmed the possibility of replacing the working blades with distributed masses. On the other hand, the presence of toroidal rings of large radii leads to a significant reduction of critical frequencies in comparison with normalized values.

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Section: вступunclassified

Verification of Geometric Models of the LPC Rotor of the K-1000-60/3000 Turbine Unit Based on Natural and Critical Frequencies in the Ansys Software Complex

Chernousenko,

Marysiuk

2023

ENERHETYKA: ekonomika, tekhnolohiyi, ekolohiya

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Calculation of Fuel Rod Strength Under Steady-State Operating Condition

Lys

2024

Mater Sci

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Increasing Turbine Hall Safety by Using Fire-Resistant, Hydrogen-Containing Lubricant Cooling Liquid for Rotor Steel Mechanical Treatment

et al. 2023

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This paper is devoted to the development of hydrogen-containing, environmentally safe, fire-resistant, and corrosion-protected lubricant cooling liquids (LCLs) from vegetable oils with improved sanitary and hygienic parameters for the machining of parts and equipment made from high-strength steels for application during the interoperation period in turbine halls. The use of plant raw materials as ecologically and fire-safe LCLs increased the efficiency of LCLs when evaluating drilling steel in terms of the dependence of the stability of the cutting tool on the drilling speed. Chips formed from LCLs during turning had a compact, cylindrical appearance, and the addition of both water and coolant during turning significantly changed the morphology of the cutting particles. Using water and LCL intensified the physical and chemical destruction processes. After the use of water and LCL, the concentration of hydrogen in the cutting products of 38KHN3MFA steel increased, which indicated its participation in facilitating the destruction during machining. In the chips formed when using LCL, the amount of hydrogen increased by 2.25 times compared to the chips obtained with the dry treatment, while with coolants, it increased by 2.6 times, indicating the intense flow of decomposition products of LCL through diffusion processes in the cutting zone. Hydrogen reduces the energy costs for the destruction of structural and phase components and promotes their dispersion. The creation of 2D and 3D images allowed for a more detailed approach to the study of the influence of LCL on surface treatments.

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Hydrogen Degradation of the Pressure Gas Tanks Materials after Long-Term Service

Cited by 3 publications

References 7 publications

Verification of Geometric Models of the LPC Rotor of the K-1000-60/3000 Turbine Unit Based on Natural and Critical Frequencies in the Ansys Software Complex

Verification of Geometric Models of the LPC Rotor of the K-1000-60/3000 Turbine Unit Based on Natural and Critical Frequencies in the Ansys Software Complex

Calculation of Fuel Rod Strength Under Steady-State Operating Condition

Increasing Turbine Hall Safety by Using Fire-Resistant, Hydrogen-Containing Lubricant Cooling Liquid for Rotor Steel Mechanical Treatment

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