Registration Number
0223U005123,
0122U001185
, R & D reports
Title
Study of the effect of swelling, radiation-thermal creep, gaseous transmutants (helium, hydrogen) on the deformed state of VVER internals
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Head
Tolstolutska Halyna D., Доктор фізико-математичних наук
Registration Date
14-12-2023
Organization
National Science Center "Kharkiv Institute of Physics and Technology"
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A new equation for the damage parameter is proposed, which is suitable for describing the processes of accumulation of radiation damage and hydrogen embrittlement in the material from the point of view of macroscopic approaches of continuum damage mechanics. Qualitative data from radiation materials science experiments and phenomenological data from long-term changes in mechanical properties during hydrogen embrittlement and long-term strength during mechanical loading and irradiation were used to formulate the equation. New approaches have been created, methods of numerical modeling of long-term deformation processes of the structural elements of the nuclear reactor nuclear reactor's internal devices, namely the barriers, have been improved. A calculated analysis of the stress-strain state of the barrier was performed, taking into account thermoelastic deformations, radiation creep, radiation swelling, and hydrogen embrittlement. It is shown that the maximum deformation values for 60 years will be approximately 5.5%. The maximum displacement of the points of the free barrier outwards does not exceed 0.4 cm, inwards - 1 cm, which indicates the probable lack of contact with fuel.
Product Description
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Karpov Serhii O.
Nikitin Arkadii V.
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2023-12-14
