Study of the Sensitivity of the Calculated Radiation Load on VVER-1000 Internals to the Uncertainty of Initial Data

被引：0
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作者：
Yu. S. Daichenkova
M. A. Kalugin
D. N. Prokhorov
D. A. Shkarovsky
机构：
[1] National Research Center Kurchatov Institute,
来源：
Atomic Energy | 2023年 / 133卷
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摘要：
One of the limiting factors of the service life of a nuclear power plant involves the state of the reactor vessel and its internals. The structural materials of the vessel and its internals are subjected to intense irradiation and thermomechanical loads, resulting in radiation embrittlement that affects the mechanical properties of these elements. For this reason, determination of the radiation load, including fast neutron fluence, damaging dose (displacement per atom), and power density, represents an urgent task. In order to confirm the determination reliability of these values, the sensitivity of the calculated results to the uncertainty of the initial data used in the calculation was analyzed. The present paper considers uncertainties due to technological deviations in the dimensions of the core elements, geometric dimensions, operational parameters, and mass of the fuel in the fuel assembly. The effect of these uncertainties is estimated for the displacement per atom and power density of VVER-1000 internals.
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页码：288 / 291
页数：3
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