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Registration Number

0220U102835, 0118U004439 , R & D reports

Title

Development of methods for collecting and processing data and layouts of databases on the metal condition of the equipment of prirnary circuit of NPP to assess its strength and lifetime

Head

Kotliarenko Andrii A,

Registration Date

11-06-2020

Organization

G.S. Pisarenko Institute for Problems of Strength of the National Academy of Sciences of Ukraine

Description

 The regulatory documents of the Ukrainian nuclear power industry have been considered and analyzed within the framework of scientific activities. The documents specify the determination of the mechanical properties from the results of hardness measurements. It is implied that the use of the materials for the current monitor of the technical condition of the specified materials for NPP equipment, in particular, bypass pipeline of high-pressure pump SAOZ (08Kh18N10T), coil from the welded joint for inlet nozzle of the reverse flow valve 1RA30S02 Du 600 (steel 16GS) and shell of the vessel of the dismantled high-pressure heater of type PV 2500-97-10A (09G2S steel), requires more detailed justification. Using the results of investigations, the procedure of data accumulation and processing has been developed, as well as the database prototypes on the metal state of the main NPP equipment for the assessment of the mechanical properties complying with the results of hardness and indentation measurements. The database prototype allows one to accumulate the following information on the metal state: its initial state, chemical composition, metallographic investigations, hardness, correlation dependencies for the calculation of the mechanical properties from the results of hardness measurements, mechanical properties, and their variation according to the initial values provided in the technical specification. The proposed database prototype makes it possible to provide the storage and availability of the information for the assessment of the technical condition of the NPP equipment and pipeline elements, as well as collection of the additional information for the further analysis of the basic document on the determination of the mechanical characteristics of the structural materials of the main NPP equipment from the hardness and indentation results.

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